go/gops
go/gops
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gops/internal/obj/arm64/asm7.go
Jaana Burcu Dogan 29b45c622d move to github.com/google, fix the build
2016-11-05 13:03:31 -07:00

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// cmd/7l/asm.c, cmd/7l/asmout.c, cmd/7l/optab.c, cmd/7l/span.c, cmd/ld/sub.c, cmd/ld/mod.c, from Vita Nuova.
// https://code.google.com/p/ken-cc/source/browse/
//
// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
// Portions Copyright © 1997-1999 Vita Nuova Limited
// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
// Portions Copyright © 2004,2006 Bruce Ellis
// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
// Portions Copyright © 2009 The Go Authors. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package arm64
import (
"fmt"
"log"
"math"
"sort"
"github.com/google/gops/internal/obj"
)
const (
funcAlign = 16
)
const (
REGFROM = 1
)
type Optab struct {
as obj.As
a1 uint8
a2 uint8
a3 uint8
type_ int8
size int8
param int16
flag int8
scond uint16
}
var oprange [ALAST & obj.AMask][]Optab
var xcmp [C_NCLASS][C_NCLASS]bool
const (
S32 = 0 << 31
S64 = 1 << 31
Sbit = 1 << 29
LSL0_32 = 2 << 13
LSL0_64 = 3 << 13
)
func OPDP2(x uint32) uint32 {
return 0<<30 | 0<<29 | 0xd6<<21 | x<<10
}
func OPDP3(sf uint32, op54 uint32, op31 uint32, o0 uint32) uint32 {
return sf<<31 | op54<<29 | 0x1B<<24 | op31<<21 | o0<<15
}
func OPBcc(x uint32) uint32 {
return 0x2A<<25 | 0<<24 | 0<<4 | x&15
}
func OPBLR(x uint32) uint32 {
/* x=0, JMP; 1, CALL; 2, RET */
return 0x6B<<25 | 0<<23 | x<<21 | 0x1F<<16 | 0<<10
}
func SYSOP(l uint32, op0 uint32, op1 uint32, crn uint32, crm uint32, op2 uint32, rt uint32) uint32 {
return 0x354<<22 | l<<21 | op0<<19 | op1<<16 | crn&15<<12 | crm&15<<8 | op2<<5 | rt
}
func SYSHINT(x uint32) uint32 {
return SYSOP(0, 0, 3, 2, 0, x, 0x1F)
}
func LDSTR12U(sz uint32, v uint32, opc uint32) uint32 {
return sz<<30 | 7<<27 | v<<26 | 1<<24 | opc<<22
}
func LDSTR9S(sz uint32, v uint32, opc uint32) uint32 {
return sz<<30 | 7<<27 | v<<26 | 0<<24 | opc<<22
}
func LD2STR(o uint32) uint32 {
return o &^ (3 << 22)
}
func LDSTX(sz uint32, o2 uint32, l uint32, o1 uint32, o0 uint32) uint32 {
return sz<<30 | 0x8<<24 | o2<<23 | l<<22 | o1<<21 | o0<<15
}
func FPCMP(m uint32, s uint32, type_ uint32, op uint32, op2 uint32) uint32 {
return m<<31 | s<<29 | 0x1E<<24 | type_<<22 | 1<<21 | op<<14 | 8<<10 | op2
}
func FPCCMP(m uint32, s uint32, type_ uint32, op uint32) uint32 {
return m<<31 | s<<29 | 0x1E<<24 | type_<<22 | 1<<21 | 1<<10 | op<<4
}
func FPOP1S(m uint32, s uint32, type_ uint32, op uint32) uint32 {
return m<<31 | s<<29 | 0x1E<<24 | type_<<22 | 1<<21 | op<<15 | 0x10<<10
}
func FPOP2S(m uint32, s uint32, type_ uint32, op uint32) uint32 {
return m<<31 | s<<29 | 0x1E<<24 | type_<<22 | 1<<21 | op<<12 | 2<<10
}
func FPCVTI(sf uint32, s uint32, type_ uint32, rmode uint32, op uint32) uint32 {
return sf<<31 | s<<29 | 0x1E<<24 | type_<<22 | 1<<21 | rmode<<19 | op<<16 | 0<<10
}
func ADR(p uint32, o uint32, rt uint32) uint32 {
return p<<31 | (o&3)<<29 | 0x10<<24 | ((o>>2)&0x7FFFF)<<5 | rt&31
}
func OPBIT(x uint32) uint32 {
return 1<<30 | 0<<29 | 0xD6<<21 | 0<<16 | x<<10
}
const (
LFROM = 1 << 0
LTO = 1 << 1
)
var optab = []Optab{
/* struct Optab:
OPCODE, from, prog->reg, to, type,size,param,flag,scond */
{obj.ATEXT, C_ADDR, C_NONE, C_TEXTSIZE, 0, 0, 0, 0, 0},
/* arithmetic operations */
{AADD, C_REG, C_REG, C_REG, 1, 4, 0, 0, 0},
{AADD, C_REG, C_NONE, C_REG, 1, 4, 0, 0, 0},
{AADC, C_REG, C_REG, C_REG, 1, 4, 0, 0, 0},
{AADC, C_REG, C_NONE, C_REG, 1, 4, 0, 0, 0},
{ANEG, C_REG, C_NONE, C_REG, 25, 4, 0, 0, 0},
{ANEG, C_NONE, C_NONE, C_REG, 25, 4, 0, 0, 0},
{ANGC, C_REG, C_NONE, C_REG, 17, 4, 0, 0, 0},
{ACMP, C_REG, C_REG, C_NONE, 1, 4, 0, 0, 0},
{AADD, C_ADDCON, C_RSP, C_RSP, 2, 4, 0, 0, 0},
{AADD, C_ADDCON, C_NONE, C_RSP, 2, 4, 0, 0, 0},
{ACMP, C_ADDCON, C_RSP, C_NONE, 2, 4, 0, 0, 0},
{AADD, C_MOVCON, C_RSP, C_RSP, 62, 8, 0, 0, 0},
{AADD, C_MOVCON, C_NONE, C_RSP, 62, 8, 0, 0, 0},
{ACMP, C_MOVCON, C_RSP, C_NONE, 62, 8, 0, 0, 0},
{AADD, C_BITCON, C_RSP, C_RSP, 62, 8, 0, 0, 0},
{AADD, C_BITCON, C_NONE, C_RSP, 62, 8, 0, 0, 0},
{ACMP, C_BITCON, C_RSP, C_NONE, 62, 8, 0, 0, 0},
{AADD, C_VCON, C_RSP, C_RSP, 13, 8, 0, LFROM, 0},
{AADD, C_VCON, C_NONE, C_RSP, 13, 8, 0, LFROM, 0},
{ACMP, C_VCON, C_REG, C_NONE, 13, 8, 0, LFROM, 0},
{AADD, C_SHIFT, C_REG, C_REG, 3, 4, 0, 0, 0},
{AADD, C_SHIFT, C_NONE, C_REG, 3, 4, 0, 0, 0},
{AMVN, C_SHIFT, C_NONE, C_REG, 3, 4, 0, 0, 0},
{ACMP, C_SHIFT, C_REG, C_NONE, 3, 4, 0, 0, 0},
{ANEG, C_SHIFT, C_NONE, C_REG, 26, 4, 0, 0, 0},
{AADD, C_REG, C_RSP, C_RSP, 27, 4, 0, 0, 0},
{AADD, C_REG, C_NONE, C_RSP, 27, 4, 0, 0, 0},
{ACMP, C_REG, C_RSP, C_NONE, 27, 4, 0, 0, 0},
{AADD, C_EXTREG, C_RSP, C_RSP, 27, 4, 0, 0, 0},
{AADD, C_EXTREG, C_NONE, C_RSP, 27, 4, 0, 0, 0},
{AMVN, C_EXTREG, C_NONE, C_RSP, 27, 4, 0, 0, 0},
{ACMP, C_EXTREG, C_RSP, C_NONE, 27, 4, 0, 0, 0},
{AADD, C_REG, C_REG, C_REG, 1, 4, 0, 0, 0},
{AADD, C_REG, C_NONE, C_REG, 1, 4, 0, 0, 0},
/* logical operations */
{AAND, C_REG, C_REG, C_REG, 1, 4, 0, 0, 0},
{AAND, C_REG, C_NONE, C_REG, 1, 4, 0, 0, 0},
{ABIC, C_REG, C_REG, C_REG, 1, 4, 0, 0, 0},
{ABIC, C_REG, C_NONE, C_REG, 1, 4, 0, 0, 0},
{AAND, C_BITCON, C_REG, C_REG, 53, 4, 0, 0, 0},
{AAND, C_BITCON, C_NONE, C_REG, 53, 4, 0, 0, 0},
{ABIC, C_BITCON, C_REG, C_REG, 53, 4, 0, 0, 0},
{ABIC, C_BITCON, C_NONE, C_REG, 53, 4, 0, 0, 0},
{AAND, C_MOVCON, C_REG, C_REG, 62, 8, 0, 0, 0},
{AAND, C_MOVCON, C_NONE, C_REG, 62, 8, 0, 0, 0},
{ABIC, C_MOVCON, C_REG, C_REG, 62, 8, 0, 0, 0},
{ABIC, C_MOVCON, C_NONE, C_REG, 62, 8, 0, 0, 0},
{AAND, C_VCON, C_REG, C_REG, 28, 8, 0, LFROM, 0},
{AAND, C_VCON, C_NONE, C_REG, 28, 8, 0, LFROM, 0},
{ABIC, C_VCON, C_REG, C_REG, 28, 8, 0, LFROM, 0},
{ABIC, C_VCON, C_NONE, C_REG, 28, 8, 0, LFROM, 0},
{AAND, C_SHIFT, C_REG, C_REG, 3, 4, 0, 0, 0},
{AAND, C_SHIFT, C_NONE, C_REG, 3, 4, 0, 0, 0},
{ABIC, C_SHIFT, C_REG, C_REG, 3, 4, 0, 0, 0},
{ABIC, C_SHIFT, C_NONE, C_REG, 3, 4, 0, 0, 0},
{AMOVD, C_RSP, C_NONE, C_RSP, 24, 4, 0, 0, 0},
{AMVN, C_REG, C_NONE, C_REG, 24, 4, 0, 0, 0},
{AMOVB, C_REG, C_NONE, C_REG, 45, 4, 0, 0, 0},
{AMOVBU, C_REG, C_NONE, C_REG, 45, 4, 0, 0, 0},
{AMOVH, C_REG, C_NONE, C_REG, 45, 4, 0, 0, 0}, /* also MOVHU */
{AMOVW, C_REG, C_NONE, C_REG, 45, 4, 0, 0, 0}, /* also MOVWU */
/* TODO: MVN C_SHIFT */
/* MOVs that become MOVK/MOVN/MOVZ/ADD/SUB/OR */
{AMOVW, C_MOVCON, C_NONE, C_REG, 32, 4, 0, 0, 0},
{AMOVD, C_MOVCON, C_NONE, C_REG, 32, 4, 0, 0, 0},
// TODO: these don't work properly.
// { AMOVW, C_ADDCON, C_NONE, C_REG, 2, 4, 0 , 0},
// { AMOVD, C_ADDCON, C_NONE, C_REG, 2, 4, 0 , 0},
{AMOVW, C_BITCON, C_NONE, C_REG, 32, 4, 0, 0, 0},
{AMOVD, C_BITCON, C_NONE, C_REG, 32, 4, 0, 0, 0},
{AMOVK, C_VCON, C_NONE, C_REG, 33, 4, 0, 0, 0},
{AMOVD, C_AACON, C_NONE, C_REG, 4, 4, REGFROM, 0, 0},
{ASDIV, C_REG, C_NONE, C_REG, 1, 4, 0, 0, 0},
{ASDIV, C_REG, C_REG, C_REG, 1, 4, 0, 0, 0},
{AB, C_NONE, C_NONE, C_SBRA, 5, 4, 0, 0, 0},
{ABL, C_NONE, C_NONE, C_SBRA, 5, 4, 0, 0, 0},
{AB, C_NONE, C_NONE, C_ZOREG, 6, 4, 0, 0, 0},
{ABL, C_NONE, C_NONE, C_REG, 6, 4, 0, 0, 0},
{ABL, C_REG, C_NONE, C_REG, 6, 4, 0, 0, 0},
{ABL, C_NONE, C_NONE, C_ZOREG, 6, 4, 0, 0, 0},
{obj.ARET, C_NONE, C_NONE, C_REG, 6, 4, 0, 0, 0},
{obj.ARET, C_NONE, C_NONE, C_ZOREG, 6, 4, 0, 0, 0},
{AADRP, C_SBRA, C_NONE, C_REG, 60, 4, 0, 0, 0},
{AADR, C_SBRA, C_NONE, C_REG, 61, 4, 0, 0, 0},
{ABFM, C_VCON, C_REG, C_REG, 42, 4, 0, 0, 0},
{ABFI, C_VCON, C_REG, C_REG, 43, 4, 0, 0, 0},
{AEXTR, C_VCON, C_REG, C_REG, 44, 4, 0, 0, 0},
{ASXTB, C_REG, C_NONE, C_REG, 45, 4, 0, 0, 0},
{ACLS, C_REG, C_NONE, C_REG, 46, 4, 0, 0, 0},
{ABEQ, C_NONE, C_NONE, C_SBRA, 7, 4, 0, 0, 0},
{ALSL, C_VCON, C_REG, C_REG, 8, 4, 0, 0, 0},
{ALSL, C_VCON, C_NONE, C_REG, 8, 4, 0, 0, 0},
{ALSL, C_REG, C_NONE, C_REG, 9, 4, 0, 0, 0},
{ALSL, C_REG, C_REG, C_REG, 9, 4, 0, 0, 0},
{ASVC, C_NONE, C_NONE, C_VCON, 10, 4, 0, 0, 0},
{ASVC, C_NONE, C_NONE, C_NONE, 10, 4, 0, 0, 0},
{ADWORD, C_NONE, C_NONE, C_VCON, 11, 8, 0, 0, 0},
{ADWORD, C_NONE, C_NONE, C_LEXT, 11, 8, 0, 0, 0},
{ADWORD, C_NONE, C_NONE, C_ADDR, 11, 8, 0, 0, 0},
{ADWORD, C_NONE, C_NONE, C_LACON, 11, 8, 0, 0, 0},
{AWORD, C_NONE, C_NONE, C_LCON, 14, 4, 0, 0, 0},
{AWORD, C_NONE, C_NONE, C_LEXT, 14, 4, 0, 0, 0},
{AWORD, C_NONE, C_NONE, C_ADDR, 14, 4, 0, 0, 0},
{AMOVW, C_VCON, C_NONE, C_REG, 12, 4, 0, LFROM, 0},
{AMOVW, C_VCONADDR, C_NONE, C_REG, 68, 8, 0, 0, 0},
{AMOVD, C_VCON, C_NONE, C_REG, 12, 4, 0, LFROM, 0},
{AMOVD, C_VCONADDR, C_NONE, C_REG, 68, 8, 0, 0, 0},
{AMOVB, C_REG, C_NONE, C_ADDR, 64, 12, 0, 0, 0},
{AMOVBU, C_REG, C_NONE, C_ADDR, 64, 12, 0, 0, 0},
{AMOVH, C_REG, C_NONE, C_ADDR, 64, 12, 0, 0, 0},
{AMOVW, C_REG, C_NONE, C_ADDR, 64, 12, 0, 0, 0},
{AMOVD, C_REG, C_NONE, C_ADDR, 64, 12, 0, 0, 0},
{AMOVB, C_ADDR, C_NONE, C_REG, 65, 12, 0, 0, 0},
{AMOVBU, C_ADDR, C_NONE, C_REG, 65, 12, 0, 0, 0},
{AMOVH, C_ADDR, C_NONE, C_REG, 65, 12, 0, 0, 0},
{AMOVW, C_ADDR, C_NONE, C_REG, 65, 12, 0, 0, 0},
{AMOVD, C_ADDR, C_NONE, C_REG, 65, 12, 0, 0, 0},
{AMOVD, C_GOTADDR, C_NONE, C_REG, 71, 8, 0, 0, 0},
{AMOVD, C_TLS_LE, C_NONE, C_REG, 69, 4, 0, 0, 0},
{AMOVD, C_TLS_IE, C_NONE, C_REG, 70, 8, 0, 0, 0},
{AMUL, C_REG, C_REG, C_REG, 15, 4, 0, 0, 0},
{AMUL, C_REG, C_NONE, C_REG, 15, 4, 0, 0, 0},
{AMADD, C_REG, C_REG, C_REG, 15, 4, 0, 0, 0},
{AREM, C_REG, C_REG, C_REG, 16, 8, 0, 0, 0},
{AREM, C_REG, C_NONE, C_REG, 16, 8, 0, 0, 0},
{ACSEL, C_COND, C_REG, C_REG, 18, 4, 0, 0, 0}, /* from3 optional */
{ACSET, C_COND, C_NONE, C_REG, 18, 4, 0, 0, 0},
{ACCMN, C_COND, C_REG, C_VCON, 19, 4, 0, 0, 0}, /* from3 either C_REG or C_VCON */
/* scaled 12-bit unsigned displacement store */
{AMOVB, C_REG, C_NONE, C_UAUTO4K, 20, 4, REGSP, 0, 0},
{AMOVB, C_REG, C_NONE, C_UOREG4K, 20, 4, 0, 0, 0},
{AMOVBU, C_REG, C_NONE, C_UAUTO4K, 20, 4, REGSP, 0, 0},
{AMOVBU, C_REG, C_NONE, C_UOREG4K, 20, 4, 0, 0, 0},
{AMOVH, C_REG, C_NONE, C_UAUTO8K, 20, 4, REGSP, 0, 0},
{AMOVH, C_REG, C_NONE, C_ZOREG, 20, 4, 0, 0, 0},
{AMOVH, C_REG, C_NONE, C_UOREG8K, 20, 4, 0, 0, 0},
{AMOVW, C_REG, C_NONE, C_UAUTO16K, 20, 4, REGSP, 0, 0},
{AMOVW, C_REG, C_NONE, C_ZOREG, 20, 4, 0, 0, 0},
{AMOVW, C_REG, C_NONE, C_UOREG16K, 20, 4, 0, 0, 0},
/* unscaled 9-bit signed displacement store */
{AMOVB, C_REG, C_NONE, C_NSAUTO, 20, 4, REGSP, 0, 0},
{AMOVB, C_REG, C_NONE, C_NSOREG, 20, 4, 0, 0, 0},
{AMOVBU, C_REG, C_NONE, C_NSAUTO, 20, 4, REGSP, 0, 0},
{AMOVBU, C_REG, C_NONE, C_NSOREG, 20, 4, 0, 0, 0},
{AMOVH, C_REG, C_NONE, C_NSAUTO, 20, 4, REGSP, 0, 0},
{AMOVH, C_REG, C_NONE, C_NSOREG, 20, 4, 0, 0, 0},
{AMOVW, C_REG, C_NONE, C_NSAUTO, 20, 4, REGSP, 0, 0},
{AMOVW, C_REG, C_NONE, C_NSOREG, 20, 4, 0, 0, 0},
{AMOVD, C_REG, C_NONE, C_UAUTO32K, 20, 4, REGSP, 0, 0},
{AMOVD, C_REG, C_NONE, C_ZOREG, 20, 4, 0, 0, 0},
{AMOVD, C_REG, C_NONE, C_UOREG32K, 20, 4, 0, 0, 0},
{AMOVD, C_REG, C_NONE, C_NSOREG, 20, 4, 0, 0, 0},
{AMOVD, C_REG, C_NONE, C_NSAUTO, 20, 4, REGSP, 0, 0},
/* short displacement load */
{AMOVB, C_UAUTO4K, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVB, C_NSAUTO, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVB, C_ZOREG, C_NONE, C_REG, 21, 4, 0, 0, 0},
{AMOVB, C_UOREG4K, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVB, C_NSOREG, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVBU, C_UAUTO4K, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVBU, C_NSAUTO, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVBU, C_ZOREG, C_NONE, C_REG, 21, 4, 0, 0, 0},
{AMOVBU, C_UOREG4K, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVBU, C_NSOREG, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVH, C_UAUTO8K, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVH, C_NSAUTO, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVH, C_ZOREG, C_NONE, C_REG, 21, 4, 0, 0, 0},
{AMOVH, C_UOREG8K, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVH, C_NSOREG, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVW, C_UAUTO16K, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVW, C_NSAUTO, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVW, C_ZOREG, C_NONE, C_REG, 21, 4, 0, 0, 0},
{AMOVW, C_UOREG16K, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVW, C_NSOREG, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVD, C_UAUTO32K, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVD, C_NSAUTO, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVD, C_ZOREG, C_NONE, C_REG, 21, 4, 0, 0, 0},
{AMOVD, C_UOREG32K, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
{AMOVD, C_NSOREG, C_NONE, C_REG, 21, 4, REGSP, 0, 0},
/* long displacement store */
{AMOVB, C_REG, C_NONE, C_LAUTO, 30, 8, REGSP, 0, 0},
{AMOVB, C_REG, C_NONE, C_LOREG, 30, 8, 0, 0, 0},
{AMOVBU, C_REG, C_NONE, C_LAUTO, 30, 8, REGSP, 0, 0},
{AMOVBU, C_REG, C_NONE, C_LOREG, 30, 8, 0, 0, 0},
{AMOVH, C_REG, C_NONE, C_LAUTO, 30, 8, REGSP, 0, 0},
{AMOVH, C_REG, C_NONE, C_LOREG, 30, 8, 0, 0, 0},
{AMOVW, C_REG, C_NONE, C_LAUTO, 30, 8, REGSP, 0, 0},
{AMOVW, C_REG, C_NONE, C_LOREG, 30, 8, 0, 0, 0},
{AMOVD, C_REG, C_NONE, C_LAUTO, 30, 8, REGSP, 0, 0},
{AMOVD, C_REG, C_NONE, C_LOREG, 30, 8, 0, 0, 0},
/* long displacement load */
{AMOVB, C_LAUTO, C_NONE, C_REG, 31, 8, REGSP, 0, 0},
{AMOVB, C_LOREG, C_NONE, C_REG, 31, 8, 0, 0, 0},
{AMOVB, C_LOREG, C_NONE, C_REG, 31, 8, 0, 0, 0},
{AMOVBU, C_LAUTO, C_NONE, C_REG, 31, 8, REGSP, 0, 0},
{AMOVBU, C_LOREG, C_NONE, C_REG, 31, 8, 0, 0, 0},
{AMOVBU, C_LOREG, C_NONE, C_REG, 31, 8, 0, 0, 0},
{AMOVH, C_LAUTO, C_NONE, C_REG, 31, 8, REGSP, 0, 0},
{AMOVH, C_LOREG, C_NONE, C_REG, 31, 8, 0, 0, 0},
{AMOVH, C_LOREG, C_NONE, C_REG, 31, 8, 0, 0, 0},
{AMOVW, C_LAUTO, C_NONE, C_REG, 31, 8, REGSP, 0, 0},
{AMOVW, C_LOREG, C_NONE, C_REG, 31, 8, 0, 0, 0},
{AMOVW, C_LOREG, C_NONE, C_REG, 31, 8, 0, 0, 0},
{AMOVD, C_LAUTO, C_NONE, C_REG, 31, 8, REGSP, 0, 0},
{AMOVD, C_LOREG, C_NONE, C_REG, 31, 8, 0, 0, 0},
{AMOVD, C_LOREG, C_NONE, C_REG, 31, 8, 0, 0, 0},
/* load long effective stack address (load int32 offset and add) */
{AMOVD, C_LACON, C_NONE, C_REG, 34, 8, REGSP, LFROM, 0},
/* pre/post-indexed load (unscaled, signed 9-bit offset) */
{AMOVD, C_LOREG, C_NONE, C_REG, 22, 4, 0, 0, C_XPOST},
{AMOVW, C_LOREG, C_NONE, C_REG, 22, 4, 0, 0, C_XPOST},
{AMOVH, C_LOREG, C_NONE, C_REG, 22, 4, 0, 0, C_XPOST},
{AMOVB, C_LOREG, C_NONE, C_REG, 22, 4, 0, 0, C_XPOST},
{AMOVBU, C_LOREG, C_NONE, C_REG, 22, 4, 0, 0, C_XPOST},
{AFMOVS, C_LOREG, C_NONE, C_FREG, 22, 4, 0, 0, C_XPOST},
{AFMOVD, C_LOREG, C_NONE, C_FREG, 22, 4, 0, 0, C_XPOST},
{AMOVD, C_LOREG, C_NONE, C_REG, 22, 4, 0, 0, C_XPRE},
{AMOVW, C_LOREG, C_NONE, C_REG, 22, 4, 0, 0, C_XPRE},
{AMOVH, C_LOREG, C_NONE, C_REG, 22, 4, 0, 0, C_XPRE},
{AMOVB, C_LOREG, C_NONE, C_REG, 22, 4, 0, 0, C_XPRE},
{AMOVBU, C_LOREG, C_NONE, C_REG, 22, 4, 0, 0, C_XPRE},
{AFMOVS, C_LOREG, C_NONE, C_FREG, 22, 4, 0, 0, C_XPRE},
{AFMOVD, C_LOREG, C_NONE, C_FREG, 22, 4, 0, 0, C_XPRE},
/* pre/post-indexed store (unscaled, signed 9-bit offset) */
{AMOVD, C_REG, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPOST},
{AMOVW, C_REG, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPOST},
{AMOVH, C_REG, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPOST},
{AMOVB, C_REG, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPOST},
{AMOVBU, C_REG, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPOST},
{AFMOVS, C_FREG, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPOST},
{AFMOVD, C_FREG, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPOST},
{AMOVD, C_REG, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPRE},
{AMOVW, C_REG, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPRE},
{AMOVH, C_REG, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPRE},
{AMOVB, C_REG, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPRE},
{AMOVBU, C_REG, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPRE},
{AFMOVS, C_FREG, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPRE},
{AFMOVD, C_FREG, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPRE},
/* pre/post-indexed load/store register pair
(unscaled, signed 10-bit quad-aligned offset) */
{ALDP, C_LOREG, C_NONE, C_PAIR, 66, 4, 0, 0, C_XPRE},
{ALDP, C_LOREG, C_NONE, C_PAIR, 66, 4, 0, 0, C_XPOST},
{ASTP, C_PAIR, C_NONE, C_LOREG, 67, 4, 0, 0, C_XPRE},
{ASTP, C_PAIR, C_NONE, C_LOREG, 67, 4, 0, 0, C_XPOST},
/* special */
{AMOVD, C_SPR, C_NONE, C_REG, 35, 4, 0, 0, 0},
{AMRS, C_SPR, C_NONE, C_REG, 35, 4, 0, 0, 0},
{AMOVD, C_REG, C_NONE, C_SPR, 36, 4, 0, 0, 0},
{AMSR, C_REG, C_NONE, C_SPR, 36, 4, 0, 0, 0},
{AMOVD, C_VCON, C_NONE, C_SPR, 37, 4, 0, 0, 0},
{AMSR, C_VCON, C_NONE, C_SPR, 37, 4, 0, 0, 0},
{AERET, C_NONE, C_NONE, C_NONE, 41, 4, 0, 0, 0},
{AFMOVS, C_FREG, C_NONE, C_UAUTO16K, 20, 4, REGSP, 0, 0},
{AFMOVS, C_FREG, C_NONE, C_NSAUTO, 20, 4, REGSP, 0, 0},
{AFMOVS, C_FREG, C_NONE, C_ZOREG, 20, 4, 0, 0, 0},
{AFMOVS, C_FREG, C_NONE, C_UOREG16K, 20, 4, 0, 0, 0},
{AFMOVS, C_FREG, C_NONE, C_NSOREG, 20, 4, 0, 0, 0},
{AFMOVD, C_FREG, C_NONE, C_UAUTO32K, 20, 4, REGSP, 0, 0},
{AFMOVD, C_FREG, C_NONE, C_NSAUTO, 20, 4, REGSP, 0, 0},
{AFMOVD, C_FREG, C_NONE, C_ZOREG, 20, 4, 0, 0, 0},
{AFMOVD, C_FREG, C_NONE, C_UOREG32K, 20, 4, 0, 0, 0},
{AFMOVD, C_FREG, C_NONE, C_NSOREG, 20, 4, 0, 0, 0},
{AFMOVS, C_UAUTO16K, C_NONE, C_FREG, 21, 4, REGSP, 0, 0},
{AFMOVS, C_NSAUTO, C_NONE, C_FREG, 21, 4, REGSP, 0, 0},
{AFMOVS, C_ZOREG, C_NONE, C_FREG, 21, 4, 0, 0, 0},
{AFMOVS, C_UOREG16K, C_NONE, C_FREG, 21, 4, 0, 0, 0},
{AFMOVS, C_NSOREG, C_NONE, C_FREG, 21, 4, 0, 0, 0},
{AFMOVD, C_UAUTO32K, C_NONE, C_FREG, 21, 4, REGSP, 0, 0},
{AFMOVD, C_NSAUTO, C_NONE, C_FREG, 21, 4, REGSP, 0, 0},
{AFMOVD, C_ZOREG, C_NONE, C_FREG, 21, 4, 0, 0, 0},
{AFMOVD, C_UOREG32K, C_NONE, C_FREG, 21, 4, 0, 0, 0},
{AFMOVD, C_NSOREG, C_NONE, C_FREG, 21, 4, 0, 0, 0},
{AFMOVS, C_FREG, C_NONE, C_LAUTO, 30, 8, REGSP, LTO, 0},
{AFMOVS, C_FREG, C_NONE, C_LOREG, 30, 8, 0, LTO, 0},
{AFMOVD, C_FREG, C_NONE, C_LAUTO, 30, 8, REGSP, LTO, 0},
{AFMOVD, C_FREG, C_NONE, C_LOREG, 30, 8, 0, LTO, 0},
{AFMOVS, C_LAUTO, C_NONE, C_FREG, 31, 8, REGSP, LFROM, 0},
{AFMOVS, C_LOREG, C_NONE, C_FREG, 31, 8, 0, LFROM, 0},
{AFMOVD, C_LAUTO, C_NONE, C_FREG, 31, 8, REGSP, LFROM, 0},
{AFMOVD, C_LOREG, C_NONE, C_FREG, 31, 8, 0, LFROM, 0},
{AFMOVS, C_FREG, C_NONE, C_ADDR, 64, 12, 0, 0, 0},
{AFMOVS, C_ADDR, C_NONE, C_FREG, 65, 12, 0, 0, 0},
{AFMOVD, C_FREG, C_NONE, C_ADDR, 64, 12, 0, 0, 0},
{AFMOVD, C_ADDR, C_NONE, C_FREG, 65, 12, 0, 0, 0},
{AFADDS, C_FREG, C_NONE, C_FREG, 54, 4, 0, 0, 0},
{AFADDS, C_FREG, C_FREG, C_FREG, 54, 4, 0, 0, 0},
{AFADDS, C_FCON, C_NONE, C_FREG, 54, 4, 0, 0, 0},
{AFADDS, C_FCON, C_FREG, C_FREG, 54, 4, 0, 0, 0},
{AFMOVS, C_FCON, C_NONE, C_FREG, 54, 4, 0, 0, 0},
{AFMOVS, C_FREG, C_NONE, C_FREG, 54, 4, 0, 0, 0},
{AFMOVD, C_FCON, C_NONE, C_FREG, 54, 4, 0, 0, 0},
{AFMOVD, C_FREG, C_NONE, C_FREG, 54, 4, 0, 0, 0},
{AFCVTZSD, C_FREG, C_NONE, C_REG, 29, 4, 0, 0, 0},
{ASCVTFD, C_REG, C_NONE, C_FREG, 29, 4, 0, 0, 0},
{AFMOVS, C_REG, C_NONE, C_FREG, 29, 4, 0, 0, 0},
{AFMOVS, C_FREG, C_NONE, C_REG, 29, 4, 0, 0, 0},
{AFMOVD, C_REG, C_NONE, C_FREG, 29, 4, 0, 0, 0},
{AFMOVD, C_FREG, C_NONE, C_REG, 29, 4, 0, 0, 0},
{AFCMPS, C_FREG, C_FREG, C_NONE, 56, 4, 0, 0, 0},
{AFCMPS, C_FCON, C_FREG, C_NONE, 56, 4, 0, 0, 0},
{AFCCMPS, C_COND, C_REG, C_VCON, 57, 4, 0, 0, 0},
{AFCSELD, C_COND, C_REG, C_FREG, 18, 4, 0, 0, 0},
{AFCVTSD, C_FREG, C_NONE, C_FREG, 29, 4, 0, 0, 0},
{ACLREX, C_NONE, C_NONE, C_VCON, 38, 4, 0, 0, 0},
{ACLREX, C_NONE, C_NONE, C_NONE, 38, 4, 0, 0, 0},
{ACBZ, C_REG, C_NONE, C_SBRA, 39, 4, 0, 0, 0},
{ATBZ, C_VCON, C_REG, C_SBRA, 40, 4, 0, 0, 0},
{ASYS, C_VCON, C_NONE, C_NONE, 50, 4, 0, 0, 0},
{ASYS, C_VCON, C_REG, C_NONE, 50, 4, 0, 0, 0},
{ASYSL, C_VCON, C_NONE, C_REG, 50, 4, 0, 0, 0},
{ADMB, C_VCON, C_NONE, C_NONE, 51, 4, 0, 0, 0},
{AHINT, C_VCON, C_NONE, C_NONE, 52, 4, 0, 0, 0},
{ALDAR, C_ZOREG, C_NONE, C_REG, 58, 4, 0, 0, 0},
{ALDXR, C_ZOREG, C_NONE, C_REG, 58, 4, 0, 0, 0},
{ALDAXR, C_ZOREG, C_NONE, C_REG, 58, 4, 0, 0, 0},
{ALDXP, C_ZOREG, C_REG, C_REG, 58, 4, 0, 0, 0},
{ASTLR, C_REG, C_NONE, C_ZOREG, 59, 4, 0, 0, 0}, // to3=C_NONE
{ASTXR, C_REG, C_NONE, C_ZOREG, 59, 4, 0, 0, 0}, // to3=C_REG
{ASTLXR, C_REG, C_NONE, C_ZOREG, 59, 4, 0, 0, 0}, // to3=C_REG
// { ASTXP, C_REG, C_NONE, C_ZOREG, 59, 4, 0 , 0}, // TODO(aram):
{AAESD, C_VREG, C_NONE, C_VREG, 29, 4, 0, 0, 0},
{ASHA1C, C_VREG, C_REG, C_VREG, 1, 4, 0, 0, 0},
{obj.AUNDEF, C_NONE, C_NONE, C_NONE, 90, 4, 0, 0, 0},
{obj.AUSEFIELD, C_ADDR, C_NONE, C_NONE, 0, 0, 0, 0, 0},
{obj.APCDATA, C_VCON, C_NONE, C_VCON, 0, 0, 0, 0, 0},
{obj.AFUNCDATA, C_VCON, C_NONE, C_ADDR, 0, 0, 0, 0, 0},
{obj.ANOP, C_NONE, C_NONE, C_NONE, 0, 0, 0, 0, 0},
{obj.ADUFFZERO, C_NONE, C_NONE, C_SBRA, 5, 4, 0, 0, 0}, // same as AB/ABL
{obj.ADUFFCOPY, C_NONE, C_NONE, C_SBRA, 5, 4, 0, 0, 0}, // same as AB/ABL
{obj.AXXX, C_NONE, C_NONE, C_NONE, 0, 4, 0, 0, 0},
}
/*
* valid pstate field values, and value to use in instruction
*/
var pstatefield = []struct {
a uint32
b uint32
}{
{REG_SPSel, 0<<16 | 4<<12 | 5<<5},
{REG_DAIFSet, 3<<16 | 4<<12 | 6<<5},
{REG_DAIFClr, 3<<16 | 4<<12 | 7<<5},
}
var pool struct {
start uint32
size uint32
}
func prasm(p *obj.Prog) {
fmt.Printf("%v\n", p)
}
func span7(ctxt *obj.Link, cursym *obj.LSym) {
p := cursym.Text
if p == nil || p.Link == nil { // handle external functions and ELF section symbols
return
}
ctxt.Cursym = cursym
ctxt.Autosize = int32(p.To.Offset&0xffffffff) + 8
if oprange[AAND&obj.AMask] == nil {
buildop(ctxt)
}
bflag := 1
c := int64(0)
p.Pc = c
var m int
var o *Optab
for p = p.Link; p != nil; p = p.Link {
ctxt.Curp = p
if p.As == ADWORD && (c&7) != 0 {
c += 4
}
p.Pc = c
o = oplook(ctxt, p)
m = int(o.size)
if m == 0 {
if p.As != obj.ANOP && p.As != obj.AFUNCDATA && p.As != obj.APCDATA && p.As != obj.AUSEFIELD {
ctxt.Diag("zero-width instruction\n%v", p)
}
continue
}
switch o.flag & (LFROM | LTO) {
case LFROM:
addpool(ctxt, p, &p.From)
case LTO:
addpool(ctxt, p, &p.To)
break
}
if p.As == AB || p.As == obj.ARET || p.As == AERET { /* TODO: other unconditional operations */
checkpool(ctxt, p, 0)
}
c += int64(m)
if ctxt.Blitrl != nil {
checkpool(ctxt, p, 1)
}
}
cursym.Size = c
/*
* if any procedure is large enough to
* generate a large SBRA branch, then
* generate extra passes putting branches
* around jmps to fix. this is rare.
*/
for bflag != 0 {
if ctxt.Debugvlog != 0 {
ctxt.Logf("%5.2f span1\n", obj.Cputime())
}
bflag = 0
c = 0
for p = cursym.Text.Link; p != nil; p = p.Link {
if p.As == ADWORD && (c&7) != 0 {
c += 4
}
p.Pc = c
o = oplook(ctxt, p)
/* very large branches */
if o.type_ == 7 && p.Pcond != nil {
otxt := p.Pcond.Pc - c
if otxt <= -(1<<18)+10 || otxt >= (1<<18)-10 {
q := ctxt.NewProg()
q.Link = p.Link
p.Link = q
q.As = AB
q.To.Type = obj.TYPE_BRANCH
q.Pcond = p.Pcond
p.Pcond = q
q = ctxt.NewProg()
q.Link = p.Link
p.Link = q
q.As = AB
q.To.Type = obj.TYPE_BRANCH
q.Pcond = q.Link.Link
bflag = 1
}
}
m = int(o.size)
if m == 0 {
if p.As != obj.ANOP && p.As != obj.AFUNCDATA && p.As != obj.APCDATA && p.As != obj.AUSEFIELD {
ctxt.Diag("zero-width instruction\n%v", p)
}
continue
}
c += int64(m)
}
}
c += -c & (funcAlign - 1)
cursym.Size = c
/*
* lay out the code, emitting code and data relocations.
*/
cursym.Grow(cursym.Size)
bp := cursym.P
psz := int32(0)
var i int
var out [6]uint32
for p := cursym.Text.Link; p != nil; p = p.Link {
ctxt.Pc = p.Pc
ctxt.Curp = p
o = oplook(ctxt, p)
// need to align DWORDs on 8-byte boundary. The ISA doesn't
// require it, but the various 64-bit loads we generate assume it.
if o.as == ADWORD && psz%8 != 0 {
bp[3] = 0
bp[2] = bp[3]
bp[1] = bp[2]
bp[0] = bp[1]
bp = bp[4:]
psz += 4
}
if int(o.size) > 4*len(out) {
log.Fatalf("out array in span7 is too small, need at least %d for %v", o.size/4, p)
}
asmout(ctxt, p, o, out[:])
for i = 0; i < int(o.size/4); i++ {
ctxt.Arch.ByteOrder.PutUint32(bp, out[i])
bp = bp[4:]
psz += 4
}
}
}
/*
* when the first reference to the literal pool threatens
* to go out of range of a 1Mb PC-relative offset
* drop the pool now, and branch round it.
*/
func checkpool(ctxt *obj.Link, p *obj.Prog, skip int) {
if pool.size >= 0xffff0 || !ispcdisp(int32(p.Pc+4+int64(pool.size)-int64(pool.start)+8)) {
flushpool(ctxt, p, skip)
} else if p.Link == nil {
flushpool(ctxt, p, 2)
}
}
func flushpool(ctxt *obj.Link, p *obj.Prog, skip int) {
if ctxt.Blitrl != nil {
if skip != 0 {
if ctxt.Debugvlog != 0 && skip == 1 {
fmt.Printf("note: flush literal pool at %#x: len=%d ref=%x\n", uint64(p.Pc+4), pool.size, pool.start)
}
q := ctxt.NewProg()
q.As = AB
q.To.Type = obj.TYPE_BRANCH
q.Pcond = p.Link
q.Link = ctxt.Blitrl
q.Lineno = p.Lineno
ctxt.Blitrl = q
} else if p.Pc+int64(pool.size)-int64(pool.start) < maxPCDisp {
return
}
// The line number for constant pool entries doesn't really matter.
// We set it to the line number of the preceding instruction so that
// there are no deltas to encode in the pc-line tables.
for q := ctxt.Blitrl; q != nil; q = q.Link {
q.Lineno = p.Lineno
}
ctxt.Elitrl.Link = p.Link
p.Link = ctxt.Blitrl
ctxt.Blitrl = nil /* BUG: should refer back to values until out-of-range */
ctxt.Elitrl = nil
pool.size = 0
pool.start = 0
}
}
/*
* TODO: hash
*/
func addpool(ctxt *obj.Link, p *obj.Prog, a *obj.Addr) {
c := aclass(ctxt, a)
lit := ctxt.Instoffset
t := *ctxt.NewProg()
t.As = AWORD
sz := 4
// MOVD foo(SB), R is actually
// MOVD addr, REGTMP
// MOVD REGTMP, R
// where addr is the address of the DWORD containing the address of foo.
if p.As == AMOVD || c == C_ADDR || c == C_VCON || int64(lit) != int64(int32(lit)) || uint64(lit) != uint64(uint32(lit)) {
// conservative: don't know if we want signed or unsigned extension.
// in case of ambiguity, store 64-bit
t.As = ADWORD
sz = 8
}
switch c {
// TODO(aram): remove.
default:
if a.Name != obj.NAME_EXTERN {
fmt.Printf("addpool: %v in %v shouldn't go to default case\n", DRconv(c), p)
}
t.To.Offset = a.Offset
t.To.Sym = a.Sym
t.To.Type = a.Type
t.To.Name = a.Name
/* This is here because MOV uint12<<12, R is disabled in optab.
Because of this, we need to load the constant from memory. */
case C_ADDCON:
fallthrough
case C_PSAUTO,
C_PPAUTO,
C_UAUTO4K,
C_UAUTO8K,
C_UAUTO16K,
C_UAUTO32K,
C_UAUTO64K,
C_NSAUTO,
C_NPAUTO,
C_LAUTO,
C_PPOREG,
C_PSOREG,
C_UOREG4K,
C_UOREG8K,
C_UOREG16K,
C_UOREG32K,
C_UOREG64K,
C_NSOREG,
C_NPOREG,
C_LOREG,
C_LACON,
C_LCON,
C_VCON:
if a.Name == obj.NAME_EXTERN {
fmt.Printf("addpool: %v in %v needs reloc\n", DRconv(c), p)
}
t.To.Type = obj.TYPE_CONST
t.To.Offset = lit
break
}
for q := ctxt.Blitrl; q != nil; q = q.Link { /* could hash on t.t0.offset */
if q.To == t.To {
p.Pcond = q
return
}
}
q := ctxt.NewProg()
*q = t
q.Pc = int64(pool.size)
if ctxt.Blitrl == nil {
ctxt.Blitrl = q
pool.start = uint32(p.Pc)
} else {
ctxt.Elitrl.Link = q
}
ctxt.Elitrl = q
pool.size = -pool.size & (funcAlign - 1)
pool.size += uint32(sz)
p.Pcond = q
}
func regoff(ctxt *obj.Link, a *obj.Addr) uint32 {
ctxt.Instoffset = 0
aclass(ctxt, a)
return uint32(ctxt.Instoffset)
}
// Maximum PC-relative displacement.
// The actual limit is ±2²⁰, but we are conservative
// to avoid needing to recompute the literal pool flush points
// as span-dependent jumps are enlarged.
const maxPCDisp = 512 * 1024
// ispcdisp reports whether v is a valid PC-relative displacement.
func ispcdisp(v int32) bool {
return -maxPCDisp < v && v < maxPCDisp && v&3 == 0
}
func isaddcon(v int64) bool {
/* uimm12 or uimm24? */
if v < 0 {
return false
}
if (v & 0xFFF) == 0 {
v >>= 12
}
return v <= 0xFFF
}
// isbitcon returns whether a constant can be encoded into a logical instruction.
// bitcon has a binary form of repetition of a bit sequence of length 2, 4, 8, 16, 32, or 64,
// which itself is a rotate (w.r.t. the length of the unit) of a sequence of ones.
// special cases: 0 and -1 are not bitcon.
// this function needs to run against virtually all the constants, so it needs to be fast.
// for this reason, bitcon testing and bitcon encoding are separate functions.
func isbitcon(x uint64) bool {
if x == 1<<64-1 || x == 0 {
return false
}
// determine the period and sign-extend a unit to 64 bits
switch {
case x != x>>32|x<<32:
// period is 64
// nothing to do
case x != x>>16|x<<48:
// period is 32
x = uint64(int64(int32(x)))
case x != x>>8|x<<56:
// period is 16
x = uint64(int64(int16(x)))
case x != x>>4|x<<60:
// period is 8
x = uint64(int64(int8(x)))
default:
// period is 4 or 2, always true
// 0001, 0010, 0100, 1000 -- 0001 rotate
// 0011, 0110, 1100, 1001 -- 0011 rotate
// 0111, 1011, 1101, 1110 -- 0111 rotate
// 0101, 1010 -- 01 rotate, repeat
return true
}
return sequenceOfOnes(x) || sequenceOfOnes(^x)
}
// sequenceOfOnes tests whether a constant is a sequence of ones in binary, with leading and trailing zeros
func sequenceOfOnes(x uint64) bool {
y := x & -x // lowest set bit of x. x is good iff x+y is a power of 2
y += x
return (y-1)&y == 0
}
// bitconEncode returns the encoding of a bitcon used in logical instructions
// x is known to be a bitcon
// a bitcon is a sequence of n ones at low bits (i.e. 1<<n-1), right rotated
// by R bits, and repeated with period of 64, 32, 16, 8, 4, or 2.
// it is encoded in logical instructions with 3 bitfields
// N (1 bit) : R (6 bits) : S (6 bits), where
// N=1 -- period=64
// N=0, S=0xxxxx -- period=32
// N=0, S=10xxxx -- period=16
// N=0, S=110xxx -- period=8
// N=0, S=1110xx -- period=4
// N=0, S=11110x -- period=2
// R is the shift amount, low bits of S = n-1
func bitconEncode(x uint64, mode int) uint32 {
var period uint32
// determine the period and sign-extend a unit to 64 bits
switch {
case x != x>>32|x<<32:
period = 64
case x != x>>16|x<<48:
period = 32
x = uint64(int64(int32(x)))
case x != x>>8|x<<56:
period = 16
x = uint64(int64(int16(x)))
case x != x>>4|x<<60:
period = 8
x = uint64(int64(int8(x)))
case x != x>>2|x<<62:
period = 4
x = uint64(int64(x<<60) >> 60)
default:
period = 2
x = uint64(int64(x<<62) >> 62)
}
neg := false
if int64(x) < 0 {
x = ^x
neg = true
}
y := x & -x // lowest set bit of x.
s := log2(y)
n := log2(x+y) - s // x (or ^x) is a sequence of n ones left shifted by s bits
if neg {
// ^x is a sequence of n ones left shifted by s bits
// adjust n, s for x
s = n + s
n = period - n
}
N := uint32(0)
if mode == 64 && period == 64 {
N = 1
}
R := (period - s) & (period - 1) & uint32(mode-1) // shift amount of right rotate
S := (n - 1) | 63&^(period<<1-1) // low bits = #ones - 1, high bits encodes period
return N<<22 | R<<16 | S<<10
}
func log2(x uint64) uint32 {
if x == 0 {
panic("log2 of 0")
}
n := uint32(0)
if x >= 1<<32 {
x >>= 32
n += 32
}
if x >= 1<<16 {
x >>= 16
n += 16
}
if x >= 1<<8 {
x >>= 8
n += 8
}
if x >= 1<<4 {
x >>= 4
n += 4
}
if x >= 1<<2 {
x >>= 2
n += 2
}
if x >= 1<<1 {
x >>= 1
n += 1
}
return n
}
func autoclass(l int64) int {
if l < 0 {
if l >= -256 {
return C_NSAUTO
}
if l >= -512 && (l&7) == 0 {
return C_NPAUTO
}
return C_LAUTO
}
if l <= 255 {
return C_PSAUTO
}
if l <= 504 && (l&7) == 0 {
return C_PPAUTO
}
if l <= 4095 {
return C_UAUTO4K
}
if l <= 8190 && (l&1) == 0 {
return C_UAUTO8K
}
if l <= 16380 && (l&3) == 0 {
return C_UAUTO16K
}
if l <= 32760 && (l&7) == 0 {
return C_UAUTO32K
}
if l <= 65520 && (l&0xF) == 0 {
return C_UAUTO64K
}
return C_LAUTO
}
func oregclass(l int64) int {
if l == 0 {
return C_ZOREG
}
return autoclass(l) - C_NPAUTO + C_NPOREG
}
/*
* given an offset v and a class c (see above)
* return the offset value to use in the instruction,
* scaled if necessary
*/
func offsetshift(ctxt *obj.Link, v int64, c int) int64 {
s := 0
if c >= C_SEXT1 && c <= C_SEXT16 {
s = c - C_SEXT1
} else if c >= C_UAUTO4K && c <= C_UAUTO64K {
s = c - C_UAUTO4K
} else if c >= C_UOREG4K && c <= C_UOREG64K {
s = c - C_UOREG4K
}
vs := v >> uint(s)
if vs<<uint(s) != v {
ctxt.Diag("odd offset: %d\n%v", v, ctxt.Curp)
}
return vs
}
/*
* if v contains a single 16-bit value aligned
* on a 16-bit field, and thus suitable for movk/movn,
* return the field index 0 to 3; otherwise return -1
*/
func movcon(v int64) int {
for s := 0; s < 64; s += 16 {
if (uint64(v) &^ (uint64(0xFFFF) << uint(s))) == 0 {
return s / 16
}
}
return -1
}
func rclass(r int16) int {
switch {
case REG_R0 <= r && r <= REG_R30: // not 31
return C_REG
case r == REGZERO:
return C_ZCON
case REG_F0 <= r && r <= REG_F31:
return C_FREG
case REG_V0 <= r && r <= REG_V31:
return C_VREG
case COND_EQ <= r && r <= COND_NV:
return C_COND
case r == REGSP:
return C_RSP
case r&REG_EXT != 0:
return C_EXTREG
case r >= REG_SPECIAL:
return C_SPR
}
return C_GOK
}
func aclass(ctxt *obj.Link, a *obj.Addr) int {
switch a.Type {
case obj.TYPE_NONE:
return C_NONE
case obj.TYPE_REG:
return rclass(a.Reg)
case obj.TYPE_REGREG:
return C_PAIR
case obj.TYPE_SHIFT:
return C_SHIFT
case obj.TYPE_MEM:
switch a.Name {
case obj.NAME_EXTERN, obj.NAME_STATIC:
if a.Sym == nil {
break
}
ctxt.Instoffset = a.Offset
if a.Sym != nil { // use relocation
if a.Sym.Type == obj.STLSBSS {
if ctxt.Flag_shared {
return C_TLS_IE
} else {
return C_TLS_LE
}
}
return C_ADDR
}
return C_LEXT
case obj.NAME_GOTREF:
return C_GOTADDR
case obj.NAME_AUTO:
ctxt.Instoffset = int64(ctxt.Autosize) + a.Offset
return autoclass(ctxt.Instoffset)
case obj.NAME_PARAM:
ctxt.Instoffset = int64(ctxt.Autosize) + a.Offset + 8
return autoclass(ctxt.Instoffset)
case obj.NAME_NONE:
ctxt.Instoffset = a.Offset
return oregclass(ctxt.Instoffset)
}
return C_GOK
case obj.TYPE_FCONST:
return C_FCON
case obj.TYPE_TEXTSIZE:
return C_TEXTSIZE
case obj.TYPE_CONST, obj.TYPE_ADDR:
switch a.Name {
case obj.NAME_NONE:
ctxt.Instoffset = a.Offset
if a.Reg != 0 && a.Reg != REGZERO {
goto aconsize
}
v := ctxt.Instoffset
if v == 0 {
return C_ZCON
}
if isaddcon(v) {
if v <= 0xFFF {
if isbitcon(uint64(v)) {
return C_ABCON0
}
return C_ADDCON0
}
if isbitcon(uint64(v)) {
return C_ABCON
}
return C_ADDCON
}
t := movcon(v)
if t >= 0 {
if isbitcon(uint64(v)) {
return C_MBCON
}
return C_MOVCON
}
t = movcon(^v)
if t >= 0 {
if isbitcon(uint64(v)) {
return C_MBCON
}
return C_MOVCON
}
if isbitcon(uint64(v)) {
return C_BITCON
}
if uint64(v) == uint64(uint32(v)) || v == int64(int32(v)) {
return C_LCON
}
return C_VCON
case obj.NAME_EXTERN, obj.NAME_STATIC:
if a.Sym == nil {
break
}
if a.Sym.Type == obj.STLSBSS {
ctxt.Diag("taking address of TLS variable is not supported")
}
ctxt.Instoffset = a.Offset
return C_VCONADDR
case obj.NAME_AUTO:
ctxt.Instoffset = int64(ctxt.Autosize) + a.Offset
goto aconsize
case obj.NAME_PARAM:
ctxt.Instoffset = int64(ctxt.Autosize) + a.Offset + 8
goto aconsize
}
return C_GOK
aconsize:
if isaddcon(ctxt.Instoffset) {
return C_AACON
}
return C_LACON
case obj.TYPE_BRANCH:
return C_SBRA
}
return C_GOK
}
func oclass(a *obj.Addr) int {
return int(a.Class) - 1
}
func oplook(ctxt *obj.Link, p *obj.Prog) *Optab {
a1 := int(p.Optab)
if a1 != 0 {
return &optab[a1-1]
}
a1 = int(p.From.Class)
if a1 == 0 {
a1 = aclass(ctxt, &p.From) + 1
p.From.Class = int8(a1)
}
a1--
a3 := int(p.To.Class)
if a3 == 0 {
a3 = aclass(ctxt, &p.To) + 1
p.To.Class = int8(a3)
}
a3--
a2 := C_NONE
if p.Reg != 0 {
a2 = rclass(p.Reg)
}
if false {
fmt.Printf("oplook %v %d %d %d\n", p.As, a1, a2, a3)
fmt.Printf("\t\t%d %d\n", p.From.Type, p.To.Type)
}
ops := oprange[p.As&obj.AMask]
c1 := &xcmp[a1]
c2 := &xcmp[a2]
c3 := &xcmp[a3]
c4 := &xcmp[p.Scond>>5]
for i := range ops {
op := &ops[i]
if (int(op.a2) == a2 || c2[op.a2]) && c4[op.scond>>5] && c1[op.a1] && c3[op.a3] {
p.Optab = uint16(cap(optab) - cap(ops) + i + 1)
return op
}
}
ctxt.Diag("illegal combination %v %v %v %v, %d %d", p, DRconv(a1), DRconv(a2), DRconv(a3), p.From.Type, p.To.Type)
prasm(p)
if ops == nil {
ops = optab
}
return &ops[0]
}
func cmp(a int, b int) bool {
if a == b {
return true
}
switch a {
case C_RSP:
if b == C_REG {
return true
}
case C_REG:
if b == C_ZCON {
return true
}
case C_ADDCON0:
if b == C_ZCON || b == C_ABCON0 {
return true
}
case C_ADDCON:
if b == C_ZCON || b == C_ABCON0 || b == C_ADDCON0 || b == C_ABCON {
return true
}
case C_BITCON:
if b == C_ABCON0 || b == C_ABCON || b == C_MBCON {
return true
}
case C_MOVCON:
if b == C_MBCON || b == C_ZCON || b == C_ADDCON0 {
return true
}
case C_LCON:
if b == C_ZCON || b == C_BITCON || b == C_ADDCON || b == C_ADDCON0 || b == C_ABCON || b == C_ABCON0 || b == C_MBCON || b == C_MOVCON {
return true
}
case C_VCON:
return cmp(C_LCON, b)
case C_LACON:
if b == C_AACON {
return true
}
case C_SEXT2:
if b == C_SEXT1 {
return true
}
case C_SEXT4:
if b == C_SEXT1 || b == C_SEXT2 {
return true
}
case C_SEXT8:
if b >= C_SEXT1 && b <= C_SEXT4 {
return true
}
case C_SEXT16:
if b >= C_SEXT1 && b <= C_SEXT8 {
return true
}
case C_LEXT:
if b >= C_SEXT1 && b <= C_SEXT16 {
return true
}
case C_PPAUTO:
if b == C_PSAUTO {
return true
}
case C_UAUTO4K:
if b == C_PSAUTO || b == C_PPAUTO {
return true
}
case C_UAUTO8K:
return cmp(C_UAUTO4K, b)
case C_UAUTO16K:
return cmp(C_UAUTO8K, b)
case C_UAUTO32K:
return cmp(C_UAUTO16K, b)
case C_UAUTO64K:
return cmp(C_UAUTO32K, b)
case C_NPAUTO:
return cmp(C_NSAUTO, b)
case C_LAUTO:
return cmp(C_NPAUTO, b) || cmp(C_UAUTO64K, b)
case C_PSOREG:
if b == C_ZOREG {
return true
}
case C_PPOREG:
if b == C_ZOREG || b == C_PSOREG {
return true
}
case C_UOREG4K:
if b == C_ZOREG || b == C_PSAUTO || b == C_PSOREG || b == C_PPAUTO || b == C_PPOREG {
return true
}
case C_UOREG8K:
return cmp(C_UOREG4K, b)
case C_UOREG16K:
return cmp(C_UOREG8K, b)
case C_UOREG32K:
return cmp(C_UOREG16K, b)
case C_UOREG64K:
return cmp(C_UOREG32K, b)
case C_NPOREG:
return cmp(C_NSOREG, b)
case C_LOREG:
return cmp(C_NPOREG, b) || cmp(C_UOREG64K, b)
case C_LBRA:
if b == C_SBRA {
return true
}
}
return false
}
type ocmp []Optab
func (x ocmp) Len() int {
return len(x)
}
func (x ocmp) Swap(i, j int) {
x[i], x[j] = x[j], x[i]
}
func (x ocmp) Less(i, j int) bool {
p1 := &x[i]
p2 := &x[j]
if p1.as != p2.as {
return p1.as < p2.as
}
if p1.a1 != p2.a1 {
return p1.a1 < p2.a1
}
if p1.a2 != p2.a2 {
return p1.a2 < p2.a2
}
if p1.a3 != p2.a3 {
return p1.a3 < p2.a3
}
if p1.scond != p2.scond {
return p1.scond < p2.scond
}
return false
}
func oprangeset(a obj.As, t []Optab) {
oprange[a&obj.AMask] = t
}
func buildop(ctxt *obj.Link) {
var n int
for i := 0; i < C_GOK; i++ {
for n = 0; n < C_GOK; n++ {
if cmp(n, i) {
xcmp[i][n] = true
}
}
}
for n = 0; optab[n].as != obj.AXXX; n++ {
}
sort.Sort(ocmp(optab[:n]))
for i := 0; i < n; i++ {
r := optab[i].as
start := i
for optab[i].as == r {
i++
}
t := optab[start:i]
i--
oprangeset(r, t)
switch r {
default:
ctxt.Diag("unknown op in build: %v", r)
log.Fatalf("bad code")
case AADD:
oprangeset(AADDS, t)
oprangeset(ASUB, t)
oprangeset(ASUBS, t)
oprangeset(AADDW, t)
oprangeset(AADDSW, t)
oprangeset(ASUBW, t)
oprangeset(ASUBSW, t)
case AAND: /* logical immediate, logical shifted register */
oprangeset(AANDS, t)
oprangeset(AANDSW, t)
oprangeset(AANDW, t)
oprangeset(AEOR, t)
oprangeset(AEORW, t)
oprangeset(AORR, t)
oprangeset(AORRW, t)
case ABIC: /* only logical shifted register */
oprangeset(ABICS, t)
oprangeset(ABICSW, t)
oprangeset(ABICW, t)
oprangeset(AEON, t)
oprangeset(AEONW, t)
oprangeset(AORN, t)
oprangeset(AORNW, t)
case ANEG:
oprangeset(ANEGS, t)
oprangeset(ANEGSW, t)
oprangeset(ANEGW, t)
case AADC: /* rn=Rd */
oprangeset(AADCW, t)
oprangeset(AADCS, t)
oprangeset(AADCSW, t)
oprangeset(ASBC, t)
oprangeset(ASBCW, t)
oprangeset(ASBCS, t)
oprangeset(ASBCSW, t)
case ANGC: /* rn=REGZERO */
oprangeset(ANGCW, t)
oprangeset(ANGCS, t)
oprangeset(ANGCSW, t)
case ACMP:
oprangeset(ACMPW, t)
oprangeset(ACMN, t)
oprangeset(ACMNW, t)
case ATST:
oprangeset(ATSTW, t)
/* register/register, and shifted */
case AMVN:
oprangeset(AMVNW, t)
case AMOVK:
oprangeset(AMOVKW, t)
oprangeset(AMOVN, t)
oprangeset(AMOVNW, t)
oprangeset(AMOVZ, t)
oprangeset(AMOVZW, t)
case ABEQ:
oprangeset(ABNE, t)
oprangeset(ABCS, t)
oprangeset(ABHS, t)
oprangeset(ABCC, t)
oprangeset(ABLO, t)
oprangeset(ABMI, t)
oprangeset(ABPL, t)
oprangeset(ABVS, t)
oprangeset(ABVC, t)
oprangeset(ABHI, t)
oprangeset(ABLS, t)
oprangeset(ABGE, t)
oprangeset(ABLT, t)
oprangeset(ABGT, t)
oprangeset(ABLE, t)
case ALSL:
oprangeset(ALSLW, t)
oprangeset(ALSR, t)
oprangeset(ALSRW, t)
oprangeset(AASR, t)
oprangeset(AASRW, t)
oprangeset(AROR, t)
oprangeset(ARORW, t)
case ACLS:
oprangeset(ACLSW, t)
oprangeset(ACLZ, t)
oprangeset(ACLZW, t)
oprangeset(ARBIT, t)
oprangeset(ARBITW, t)
oprangeset(AREV, t)
oprangeset(AREVW, t)
oprangeset(AREV16, t)
oprangeset(AREV16W, t)
oprangeset(AREV32, t)
case ASDIV:
oprangeset(ASDIVW, t)
oprangeset(AUDIV, t)
oprangeset(AUDIVW, t)
oprangeset(ACRC32B, t)
oprangeset(ACRC32CB, t)
oprangeset(ACRC32CH, t)
oprangeset(ACRC32CW, t)
oprangeset(ACRC32CX, t)
oprangeset(ACRC32H, t)
oprangeset(ACRC32W, t)
oprangeset(ACRC32X, t)
case AMADD:
oprangeset(AMADDW, t)
oprangeset(AMSUB, t)
oprangeset(AMSUBW, t)
oprangeset(ASMADDL, t)
oprangeset(ASMSUBL, t)
oprangeset(AUMADDL, t)
oprangeset(AUMSUBL, t)
case AREM:
oprangeset(AREMW, t)
oprangeset(AUREM, t)
oprangeset(AUREMW, t)
case AMUL:
oprangeset(AMULW, t)
oprangeset(AMNEG, t)
oprangeset(AMNEGW, t)
oprangeset(ASMNEGL, t)
oprangeset(ASMULL, t)
oprangeset(ASMULH, t)
oprangeset(AUMNEGL, t)
oprangeset(AUMULH, t)
oprangeset(AUMULL, t)
case AMOVB:
oprangeset(AMOVBU, t)
case AMOVH:
oprangeset(AMOVHU, t)
case AMOVW:
oprangeset(AMOVWU, t)
case ABFM:
oprangeset(ABFMW, t)
oprangeset(ASBFM, t)
oprangeset(ASBFMW, t)
oprangeset(AUBFM, t)
oprangeset(AUBFMW, t)
case ABFI:
oprangeset(ABFIW, t)
oprangeset(ABFXIL, t)
oprangeset(ABFXILW, t)
oprangeset(ASBFIZ, t)
oprangeset(ASBFIZW, t)
oprangeset(ASBFX, t)
oprangeset(ASBFXW, t)
oprangeset(AUBFIZ, t)
oprangeset(AUBFIZW, t)
oprangeset(AUBFX, t)
oprangeset(AUBFXW, t)
case AEXTR:
oprangeset(AEXTRW, t)
case ASXTB:
oprangeset(ASXTBW, t)
oprangeset(ASXTH, t)
oprangeset(ASXTHW, t)
oprangeset(ASXTW, t)
oprangeset(AUXTB, t)
oprangeset(AUXTH, t)
oprangeset(AUXTW, t)
oprangeset(AUXTBW, t)
oprangeset(AUXTHW, t)
case ACCMN:
oprangeset(ACCMNW, t)
oprangeset(ACCMP, t)
oprangeset(ACCMPW, t)
case ACSEL:
oprangeset(ACSELW, t)
oprangeset(ACSINC, t)
oprangeset(ACSINCW, t)
oprangeset(ACSINV, t)
oprangeset(ACSINVW, t)
oprangeset(ACSNEG, t)
oprangeset(ACSNEGW, t)
// aliases Rm=Rn, !cond
oprangeset(ACINC, t)
oprangeset(ACINCW, t)
oprangeset(ACINV, t)
oprangeset(ACINVW, t)
oprangeset(ACNEG, t)
oprangeset(ACNEGW, t)
// aliases, Rm=Rn=REGZERO, !cond
case ACSET:
oprangeset(ACSETW, t)
oprangeset(ACSETM, t)
oprangeset(ACSETMW, t)
case AMOVD,
AMOVBU,
AB,
ABL,
AWORD,
ADWORD,
obj.ARET,
obj.ATEXT,
ASTP,
ALDP:
break
case AERET:
oprangeset(AWFE, t)
oprangeset(AWFI, t)
oprangeset(AYIELD, t)
oprangeset(ASEV, t)
oprangeset(ASEVL, t)
oprangeset(ADRPS, t)
case ACBZ:
oprangeset(ACBZW, t)
oprangeset(ACBNZ, t)
oprangeset(ACBNZW, t)
case ATBZ:
oprangeset(ATBNZ, t)
case AADR, AADRP:
break
case ACLREX:
break
case ASVC:
oprangeset(AHLT, t)
oprangeset(AHVC, t)
oprangeset(ASMC, t)
oprangeset(ABRK, t)
oprangeset(ADCPS1, t)
oprangeset(ADCPS2, t)
oprangeset(ADCPS3, t)
case AFADDS:
oprangeset(AFADDD, t)
oprangeset(AFSUBS, t)
oprangeset(AFSUBD, t)
oprangeset(AFMULS, t)
oprangeset(AFMULD, t)
oprangeset(AFNMULS, t)
oprangeset(AFNMULD, t)
oprangeset(AFDIVS, t)
oprangeset(AFMAXD, t)
oprangeset(AFMAXS, t)
oprangeset(AFMIND, t)
oprangeset(AFMINS, t)
oprangeset(AFMAXNMD, t)
oprangeset(AFMAXNMS, t)
oprangeset(AFMINNMD, t)
oprangeset(AFMINNMS, t)
oprangeset(AFDIVD, t)
case AFCVTSD:
oprangeset(AFCVTDS, t)
oprangeset(AFABSD, t)
oprangeset(AFABSS, t)
oprangeset(AFNEGD, t)
oprangeset(AFNEGS, t)
oprangeset(AFSQRTD, t)
oprangeset(AFSQRTS, t)
oprangeset(AFRINTNS, t)
oprangeset(AFRINTND, t)
oprangeset(AFRINTPS, t)
oprangeset(AFRINTPD, t)
oprangeset(AFRINTMS, t)
oprangeset(AFRINTMD, t)
oprangeset(AFRINTZS, t)
oprangeset(AFRINTZD, t)
oprangeset(AFRINTAS, t)
oprangeset(AFRINTAD, t)
oprangeset(AFRINTXS, t)
oprangeset(AFRINTXD, t)
oprangeset(AFRINTIS, t)
oprangeset(AFRINTID, t)
oprangeset(AFCVTDH, t)
oprangeset(AFCVTHS, t)
oprangeset(AFCVTHD, t)
oprangeset(AFCVTSH, t)
case AFCMPS:
oprangeset(AFCMPD, t)
oprangeset(AFCMPES, t)
oprangeset(AFCMPED, t)
case AFCCMPS:
oprangeset(AFCCMPD, t)
oprangeset(AFCCMPES, t)
oprangeset(AFCCMPED, t)
case AFCSELD:
oprangeset(AFCSELS, t)
case AFMOVS, AFMOVD:
break
case AFCVTZSD:
oprangeset(AFCVTZSDW, t)
oprangeset(AFCVTZSS, t)
oprangeset(AFCVTZSSW, t)
oprangeset(AFCVTZUD, t)
oprangeset(AFCVTZUDW, t)
oprangeset(AFCVTZUS, t)
oprangeset(AFCVTZUSW, t)
case ASCVTFD:
oprangeset(ASCVTFS, t)
oprangeset(ASCVTFWD, t)
oprangeset(ASCVTFWS, t)
oprangeset(AUCVTFD, t)
oprangeset(AUCVTFS, t)
oprangeset(AUCVTFWD, t)
oprangeset(AUCVTFWS, t)
case ASYS:
oprangeset(AAT, t)
oprangeset(ADC, t)
oprangeset(AIC, t)
oprangeset(ATLBI, t)
case ASYSL, AHINT:
break
case ADMB:
oprangeset(ADSB, t)
oprangeset(AISB, t)
case AMRS, AMSR:
break
case ALDAR:
oprangeset(ALDARW, t)
fallthrough
case ALDXR:
oprangeset(ALDXRB, t)
oprangeset(ALDXRH, t)
oprangeset(ALDXRW, t)
case ALDAXR:
oprangeset(ALDAXRB, t)
oprangeset(ALDAXRH, t)
oprangeset(ALDAXRW, t)
case ALDXP:
oprangeset(ALDXPW, t)
case ASTLR:
oprangeset(ASTLRW, t)
case ASTXR:
oprangeset(ASTXRB, t)
oprangeset(ASTXRH, t)
oprangeset(ASTXRW, t)
case ASTLXR:
oprangeset(ASTLXRB, t)
oprangeset(ASTLXRH, t)
oprangeset(ASTLXRW, t)
case ASTXP:
oprangeset(ASTXPW, t)
case AAESD:
oprangeset(AAESE, t)
oprangeset(AAESMC, t)
oprangeset(AAESIMC, t)
oprangeset(ASHA1H, t)
oprangeset(ASHA1SU1, t)
oprangeset(ASHA256SU0, t)
case ASHA1C:
oprangeset(ASHA1P, t)
oprangeset(ASHA1M, t)
oprangeset(ASHA1SU0, t)
oprangeset(ASHA256H, t)
oprangeset(ASHA256H2, t)
oprangeset(ASHA256SU1, t)
case obj.ANOP,
obj.AUNDEF,
obj.AUSEFIELD,
obj.AFUNCDATA,
obj.APCDATA,
obj.ADUFFZERO,
obj.ADUFFCOPY:
break
}
}
}
func chipfloat7(ctxt *obj.Link, e float64) int {
ei := math.Float64bits(e)
l := uint32(int32(ei))
h := uint32(int32(ei >> 32))
if l != 0 || h&0xffff != 0 {
return -1
}
h1 := h & 0x7fc00000
if h1 != 0x40000000 && h1 != 0x3fc00000 {
return -1
}
n := 0
// sign bit (a)
if h&0x80000000 != 0 {
n |= 1 << 7
}
// exp sign bit (b)
if h1 == 0x3fc00000 {
n |= 1 << 6
}
// rest of exp and mantissa (cd-efgh)
n |= int((h >> 16) & 0x3f)
//print("match %.8lux %.8lux %d\n", l, h, n);
return n
}
/* form offset parameter to SYS; special register number */
func SYSARG5(op0 int, op1 int, Cn int, Cm int, op2 int) int {
return op0<<19 | op1<<16 | Cn<<12 | Cm<<8 | op2<<5
}
func SYSARG4(op1 int, Cn int, Cm int, op2 int) int {
return SYSARG5(0, op1, Cn, Cm, op2)
}
func asmout(ctxt *obj.Link, p *obj.Prog, o *Optab, out []uint32) {
o1 := uint32(0)
o2 := uint32(0)
o3 := uint32(0)
o4 := uint32(0)
o5 := uint32(0)
if false { /*debug['P']*/
fmt.Printf("%x: %v\ttype %d\n", uint32(p.Pc), p, o.type_)
}
switch o.type_ {
default:
ctxt.Diag("unknown asm %d", o.type_)
prasm(p)
case 0: /* pseudo ops */
break
case 1: /* op Rm,[Rn],Rd; default Rn=Rd -> op Rm<<0,[Rn,]Rd (shifted register) */
o1 = oprrr(ctxt, p.As)
rf := int(p.From.Reg)
rt := int(p.To.Reg)
r := int(p.Reg)
if p.To.Type == obj.TYPE_NONE {
rt = REGZERO
}
if r == 0 {
r = rt
}
o1 |= (uint32(rf&31) << 16) | (uint32(r&31) << 5) | uint32(rt&31)
case 2: /* add/sub $(uimm12|uimm24)[,R],R; cmp $(uimm12|uimm24),R */
o1 = opirr(ctxt, p.As)
rt := int(p.To.Reg)
if p.To.Type == obj.TYPE_NONE {
if (o1 & Sbit) == 0 {
ctxt.Diag("ineffective ZR destination\n%v", p)
}
rt = REGZERO
}
r := int(p.Reg)
if r == 0 {
r = rt
}
v := int32(regoff(ctxt, &p.From))
o1 = oaddi(ctxt, int32(o1), v, r, rt)
case 3: /* op R<<n[,R],R (shifted register) */
o1 = oprrr(ctxt, p.As)
o1 |= uint32(p.From.Offset) /* includes reg, op, etc */
rt := int(p.To.Reg)
if p.To.Type == obj.TYPE_NONE {
rt = REGZERO
}
r := int(p.Reg)
if p.As == AMVN || p.As == AMVNW {
r = REGZERO
} else if r == 0 {
r = rt
}
o1 |= (uint32(r&31) << 5) | uint32(rt&31)
case 4: /* mov $addcon, R; mov $recon, R; mov $racon, R */
o1 = opirr(ctxt, p.As)
rt := int(p.To.Reg)
r := int(o.param)
if r == 0 {
r = REGZERO
} else if r == REGFROM {
r = int(p.From.Reg)
}
if r == 0 {
r = REGSP
}
v := int32(regoff(ctxt, &p.From))
if (v & 0xFFF000) != 0 {
v >>= 12
o1 |= 1 << 22 /* shift, by 12 */
}
o1 |= ((uint32(v) & 0xFFF) << 10) | (uint32(r&31) << 5) | uint32(rt&31)
case 5: /* b s; bl s */
o1 = opbra(ctxt, p.As)
if p.To.Sym == nil {
o1 |= uint32(brdist(ctxt, p, 0, 26, 2))
break
}
rel := obj.Addrel(ctxt.Cursym)
rel.Off = int32(ctxt.Pc)
rel.Siz = 4
rel.Sym = p.To.Sym
rel.Add = p.To.Offset
rel.Type = obj.R_CALLARM64
case 6: /* b ,O(R); bl ,O(R) */
o1 = opbrr(ctxt, p.As)
o1 |= uint32(p.To.Reg&31) << 5
rel := obj.Addrel(ctxt.Cursym)
rel.Off = int32(ctxt.Pc)
rel.Siz = 0
rel.Type = obj.R_CALLIND
case 7: /* beq s */
o1 = opbra(ctxt, p.As)
o1 |= uint32(brdist(ctxt, p, 0, 19, 2) << 5)
case 8: /* lsl $c,[R],R -> ubfm $(W-1)-c,$(-c MOD (W-1)),Rn,Rd */
rt := int(p.To.Reg)
rf := int(p.Reg)
if rf == 0 {
rf = rt
}
v := int32(p.From.Offset)
switch p.As {
case AASR:
o1 = opbfm(ctxt, ASBFM, int(v), 63, rf, rt)
case AASRW:
o1 = opbfm(ctxt, ASBFMW, int(v), 31, rf, rt)
case ALSL:
o1 = opbfm(ctxt, AUBFM, int((64-v)&63), int(63-v), rf, rt)
case ALSLW:
o1 = opbfm(ctxt, AUBFMW, int((32-v)&31), int(31-v), rf, rt)
case ALSR:
o1 = opbfm(ctxt, AUBFM, int(v), 63, rf, rt)
case ALSRW:
o1 = opbfm(ctxt, AUBFMW, int(v), 31, rf, rt)
case AROR:
o1 = opextr(ctxt, AEXTR, v, rf, rf, rt)
case ARORW:
o1 = opextr(ctxt, AEXTRW, v, rf, rf, rt)
default:
ctxt.Diag("bad shift $con\n%v", ctxt.Curp)
break
}
case 9: /* lsl Rm,[Rn],Rd -> lslv Rm, Rn, Rd */
o1 = oprrr(ctxt, p.As)
r := int(p.Reg)
if r == 0 {
r = int(p.To.Reg)
}
o1 |= (uint32(p.From.Reg&31) << 16) | (uint32(r&31) << 5) | uint32(p.To.Reg&31)
case 10: /* brk/hvc/.../svc [$con] */
o1 = opimm(ctxt, p.As)
if p.To.Type != obj.TYPE_NONE {
o1 |= uint32((p.To.Offset & 0xffff) << 5)
}
case 11: /* dword */
aclass(ctxt, &p.To)
o1 = uint32(ctxt.Instoffset)
o2 = uint32(ctxt.Instoffset >> 32)
if p.To.Sym != nil {
rel := obj.Addrel(ctxt.Cursym)
rel.Off = int32(ctxt.Pc)
rel.Siz = 8
rel.Sym = p.To.Sym
rel.Add = p.To.Offset
rel.Type = obj.R_ADDR
o2 = 0
o1 = o2
}
case 12: /* movT $vcon, reg */
o1 = omovlit(ctxt, p.As, p, &p.From, int(p.To.Reg))
case 13: /* addop $vcon, [R], R (64 bit literal); cmp $lcon,R -> addop $lcon,R, ZR */
o1 = omovlit(ctxt, AMOVD, p, &p.From, REGTMP)
if !(o1 != 0) {
break
}
rt := int(p.To.Reg)
if p.To.Type == obj.TYPE_NONE {
rt = REGZERO
}
r := int(p.Reg)
if r == 0 {
r = rt
}
if p.To.Type != obj.TYPE_NONE && (p.To.Reg == REGSP || r == REGSP) {
o2 = opxrrr(ctxt, p.As)
o2 |= REGTMP & 31 << 16
o2 |= LSL0_64
} else {
o2 = oprrr(ctxt, p.As)
o2 |= REGTMP & 31 << 16 /* shift is 0 */
}
o2 |= uint32(r&31) << 5
o2 |= uint32(rt & 31)
case 14: /* word */
if aclass(ctxt, &p.To) == C_ADDR {
ctxt.Diag("address constant needs DWORD\n%v", p)
}
o1 = uint32(ctxt.Instoffset)
if p.To.Sym != nil {
// This case happens with words generated
// in the PC stream as part of the literal pool.
rel := obj.Addrel(ctxt.Cursym)
rel.Off = int32(ctxt.Pc)
rel.Siz = 4
rel.Sym = p.To.Sym
rel.Add = p.To.Offset
rel.Type = obj.R_ADDR
o1 = 0
}
case 15: /* mul/mneg/umulh/umull r,[r,]r; madd/msub Rm,Rn,Ra,Rd */
o1 = oprrr(ctxt, p.As)
rf := int(p.From.Reg)
rt := int(p.To.Reg)
var r int
var ra int
if p.From3Type() == obj.TYPE_REG {
r = int(p.From3.Reg)
ra = int(p.Reg)
if ra == 0 {
ra = REGZERO
}
} else {
r = int(p.Reg)
if r == 0 {
r = rt
}
ra = REGZERO
}
o1 |= (uint32(rf&31) << 16) | (uint32(ra&31) << 10) | (uint32(r&31) << 5) | uint32(rt&31)
case 16: /* XremY R[,R],R -> XdivY; XmsubY */
o1 = oprrr(ctxt, p.As)
rf := int(p.From.Reg)
rt := int(p.To.Reg)
r := int(p.Reg)
if r == 0 {
r = rt
}
o1 |= (uint32(rf&31) << 16) | (uint32(r&31) << 5) | REGTMP&31
o2 = oprrr(ctxt, AMSUBW)
o2 |= o1 & (1 << 31) /* same size */
o2 |= (uint32(rf&31) << 16) | (uint32(r&31) << 10) | (REGTMP & 31 << 5) | uint32(rt&31)
case 17: /* op Rm,[Rn],Rd; default Rn=ZR */
o1 = oprrr(ctxt, p.As)
rf := int(p.From.Reg)
rt := int(p.To.Reg)
r := int(p.Reg)
if p.To.Type == obj.TYPE_NONE {
rt = REGZERO
}
if r == 0 {
r = REGZERO
}
o1 |= (uint32(rf&31) << 16) | (uint32(r&31) << 5) | uint32(rt&31)
case 18: /* csel cond,Rn,Rm,Rd; cinc/cinv/cneg cond,Rn,Rd; cset cond,Rd */
o1 = oprrr(ctxt, p.As)
cond := int(p.From.Reg)
r := int(p.Reg)
var rf int
if r != 0 {
if p.From3Type() == obj.TYPE_NONE {
/* CINC/CINV/CNEG */
rf = r
cond ^= 1
} else {
rf = int(p.From3.Reg) /* CSEL */
}
} else {
/* CSET */
if p.From3Type() != obj.TYPE_NONE {
ctxt.Diag("invalid combination\n%v", p)
}
rf = REGZERO
r = rf
cond ^= 1
}
rt := int(p.To.Reg)
o1 |= (uint32(rf&31) << 16) | (uint32(cond&31) << 12) | (uint32(r&31) << 5) | uint32(rt&31)
case 19: /* CCMN cond, (Rm|uimm5),Rn, uimm4 -> ccmn Rn,Rm,uimm4,cond */
nzcv := int(p.To.Offset)
cond := int(p.From.Reg)
var rf int
if p.From3.Type == obj.TYPE_REG {
o1 = oprrr(ctxt, p.As)
rf = int(p.From3.Reg) /* Rm */
} else {
o1 = opirr(ctxt, p.As)
rf = int(p.From3.Offset & 0x1F)
}
o1 |= (uint32(rf&31) << 16) | (uint32(cond) << 12) | (uint32(p.Reg&31) << 5) | uint32(nzcv)
case 20: /* movT R,O(R) -> strT */
v := int32(regoff(ctxt, &p.To))
sz := int32(1 << uint(movesize(p.As)))
r := int(p.To.Reg)
if r == 0 {
r = int(o.param)
}
if v < 0 || v%sz != 0 { /* unscaled 9-bit signed */
o1 = olsr9s(ctxt, int32(opstr9(ctxt, p.As)), v, r, int(p.From.Reg))
} else {
v = int32(offsetshift(ctxt, int64(v), int(o.a3)))
o1 = olsr12u(ctxt, int32(opstr12(ctxt, p.As)), v, r, int(p.From.Reg))
}
case 21: /* movT O(R),R -> ldrT */
v := int32(regoff(ctxt, &p.From))
sz := int32(1 << uint(movesize(p.As)))
r := int(p.From.Reg)
if r == 0 {
r = int(o.param)
}
if v < 0 || v%sz != 0 { /* unscaled 9-bit signed */
o1 = olsr9s(ctxt, int32(opldr9(ctxt, p.As)), v, r, int(p.To.Reg))
} else {
v = int32(offsetshift(ctxt, int64(v), int(o.a1)))
//print("offset=%lld v=%ld a1=%d\n", instoffset, v, o->a1);
o1 = olsr12u(ctxt, int32(opldr12(ctxt, p.As)), v, r, int(p.To.Reg))
}
case 22: /* movT (R)O!,R; movT O(R)!, R -> ldrT */
v := int32(p.From.Offset)
if v < -256 || v > 255 {
ctxt.Diag("offset out of range\n%v", p)
}
o1 = opldrpp(ctxt, p.As)
if o.scond == C_XPOST {
o1 |= 1 << 10
} else {
o1 |= 3 << 10
}
o1 |= ((uint32(v) & 0x1FF) << 12) | (uint32(p.From.Reg&31) << 5) | uint32(p.To.Reg&31)
case 23: /* movT R,(R)O!; movT O(R)!, R -> strT */
v := int32(p.To.Offset)
if v < -256 || v > 255 {
ctxt.Diag("offset out of range\n%v", p)
}
o1 = LD2STR(opldrpp(ctxt, p.As))
if o.scond == C_XPOST {
o1 |= 1 << 10
} else {
o1 |= 3 << 10
}
o1 |= ((uint32(v) & 0x1FF) << 12) | (uint32(p.To.Reg&31) << 5) | uint32(p.From.Reg&31)
case 24: /* mov/mvn Rs,Rd -> add $0,Rs,Rd or orr Rs,ZR,Rd */
rf := int(p.From.Reg)
rt := int(p.To.Reg)
s := rf == REGSP || rt == REGSP
if p.As == AMVN || p.As == AMVNW {
if s {
ctxt.Diag("illegal SP reference\n%v", p)
}
o1 = oprrr(ctxt, p.As)
o1 |= (uint32(rf&31) << 16) | (REGZERO & 31 << 5) | uint32(rt&31)
} else if s {
o1 = opirr(ctxt, p.As)
o1 |= (uint32(rf&31) << 5) | uint32(rt&31)
} else {
o1 = oprrr(ctxt, p.As)
o1 |= (uint32(rf&31) << 16) | (REGZERO & 31 << 5) | uint32(rt&31)
}
case 25: /* negX Rs, Rd -> subX Rs<<0, ZR, Rd */
o1 = oprrr(ctxt, p.As)
rf := int(p.From.Reg)
if rf == C_NONE {
rf = int(p.To.Reg)
}
rt := int(p.To.Reg)
o1 |= (uint32(rf&31) << 16) | (REGZERO & 31 << 5) | uint32(rt&31)
case 26: /* negX Rm<<s, Rd -> subX Rm<<s, ZR, Rd */
o1 = oprrr(ctxt, p.As)
o1 |= uint32(p.From.Offset) /* includes reg, op, etc */
rt := int(p.To.Reg)
o1 |= (REGZERO & 31 << 5) | uint32(rt&31)
case 27: /* op Rm<<n[,Rn],Rd (extended register) */
o1 = opxrrr(ctxt, p.As)
if (p.From.Reg-obj.RBaseARM64)&REG_EXT != 0 {
ctxt.Diag("extended register not implemented\n%v", p)
// o1 |= uint32(p.From.Offset) /* includes reg, op, etc */
} else {
o1 |= uint32(p.From.Reg&31) << 16
}
rt := int(p.To.Reg)
if p.To.Type == obj.TYPE_NONE {
rt = REGZERO
}
r := int(p.Reg)
if r == 0 {
r = rt
}
o1 |= (uint32(r&31) << 5) | uint32(rt&31)
case 28: /* logop $vcon, [R], R (64 bit literal) */
o1 = omovlit(ctxt, AMOVD, p, &p.From, REGTMP)
if !(o1 != 0) {
break
}
r := int(p.Reg)
if r == 0 {
r = int(p.To.Reg)
}
o2 = oprrr(ctxt, p.As)
o2 |= REGTMP & 31 << 16 /* shift is 0 */
o2 |= uint32(r&31) << 5
o2 |= uint32(p.To.Reg & 31)
case 29: /* op Rn, Rd */
fc := aclass(ctxt, &p.From)
tc := aclass(ctxt, &p.To)
if (p.As == AFMOVD || p.As == AFMOVS) && (fc == C_REG || fc == C_ZCON || tc == C_REG || tc == C_ZCON) {
// FMOV Rx, Fy or FMOV Fy, Rx
o1 = FPCVTI(0, 0, 0, 0, 6)
if p.As == AFMOVD {
o1 |= 1<<31 | 1<<22 // 64-bit
}
if fc == C_REG || fc == C_ZCON {
o1 |= 1 << 16 // FMOV Rx, Fy
}
} else {
o1 = oprrr(ctxt, p.As)
}
o1 |= uint32(p.From.Reg&31)<<5 | uint32(p.To.Reg&31)
case 30: /* movT R,L(R) -> strT */
s := movesize(o.as)
if s < 0 {
ctxt.Diag("unexpected long move, op %v tab %v\n%v", p.As, o.as, p)
}
v := int32(regoff(ctxt, &p.To))
if v < 0 {
ctxt.Diag("negative large offset\n%v", p)
}
if (v & ((1 << uint(s)) - 1)) != 0 {
ctxt.Diag("misaligned offset\n%v", p)
}
hi := v - (v & (0xFFF << uint(s)))
if (hi & 0xFFF) != 0 {
ctxt.Diag("internal: miscalculated offset %d [%d]\n%v", v, s, p)
}
//fprint(2, "v=%ld (%#lux) s=%d hi=%ld (%#lux) v'=%ld (%#lux)\n", v, v, s, hi, hi, ((v-hi)>>s)&0xFFF, ((v-hi)>>s)&0xFFF);
r := int(p.To.Reg)
if r == 0 {
r = int(o.param)
}
o1 = oaddi(ctxt, int32(opirr(ctxt, AADD)), hi, r, REGTMP)
o2 = olsr12u(ctxt, int32(opstr12(ctxt, p.As)), ((v-hi)>>uint(s))&0xFFF, REGTMP, int(p.From.Reg))
case 31: /* movT L(R), R -> ldrT */
s := movesize(o.as)
if s < 0 {
ctxt.Diag("unexpected long move, op %v tab %v\n%v", p.As, o.as, p)
}
v := int32(regoff(ctxt, &p.From))
if v < 0 {
ctxt.Diag("negative large offset\n%v", p)
}
if (v & ((1 << uint(s)) - 1)) != 0 {
ctxt.Diag("misaligned offset\n%v", p)
}
hi := v - (v & (0xFFF << uint(s)))
if (hi & 0xFFF) != 0 {
ctxt.Diag("internal: miscalculated offset %d [%d]\n%v", v, s, p)
}
//fprint(2, "v=%ld (%#lux) s=%d hi=%ld (%#lux) v'=%ld (%#lux)\n", v, v, s, hi, hi, ((v-hi)>>s)&0xFFF, ((v-hi)>>s)&0xFFF);
r := int(p.From.Reg)
if r == 0 {
r = int(o.param)
}
o1 = oaddi(ctxt, int32(opirr(ctxt, AADD)), hi, r, REGTMP)
o2 = olsr12u(ctxt, int32(opldr12(ctxt, p.As)), ((v-hi)>>uint(s))&0xFFF, REGTMP, int(p.To.Reg))
case 32: /* mov $con, R -> movz/movn */
o1 = omovconst(ctxt, p.As, p, &p.From, int(p.To.Reg))
case 33: /* movk $uimm16 << pos */
o1 = opirr(ctxt, p.As)
d := p.From.Offset
if (d >> 16) != 0 {
ctxt.Diag("requires uimm16\n%v", p)
}
s := 0
if p.From3Type() != obj.TYPE_NONE {
if p.From3.Type != obj.TYPE_CONST {
ctxt.Diag("missing bit position\n%v", p)
}
s = int(p.From3.Offset / 16)
if (s*16&0xF) != 0 || s >= 4 || (o1&S64) == 0 && s >= 2 {
ctxt.Diag("illegal bit position\n%v", p)
}
}
rt := int(p.To.Reg)
o1 |= uint32(((d & 0xFFFF) << 5) | int64((uint32(s)&3)<<21) | int64(rt&31))
case 34: /* mov $lacon,R */
o1 = omovlit(ctxt, AMOVD, p, &p.From, REGTMP)
if !(o1 != 0) {
break
}
o2 = opxrrr(ctxt, AADD)
o2 |= REGTMP & 31 << 16
o2 |= LSL0_64
r := int(p.From.Reg)
if r == 0 {
r = int(o.param)
}
o2 |= uint32(r&31) << 5
o2 |= uint32(p.To.Reg & 31)
case 35: /* mov SPR,R -> mrs */
o1 = oprrr(ctxt, AMRS)
v := int32(p.From.Offset)
if (o1 & uint32(v&^(3<<19))) != 0 {
ctxt.Diag("MRS register value overlap\n%v", p)
}
o1 |= uint32(v)
o1 |= uint32(p.To.Reg & 31)
case 36: /* mov R,SPR */
o1 = oprrr(ctxt, AMSR)
v := int32(p.To.Offset)
if (o1 & uint32(v&^(3<<19))) != 0 {
ctxt.Diag("MSR register value overlap\n%v", p)
}
o1 |= uint32(v)
o1 |= uint32(p.From.Reg & 31)
case 37: /* mov $con,PSTATEfield -> MSR [immediate] */
if (uint64(p.From.Offset) &^ uint64(0xF)) != 0 {
ctxt.Diag("illegal immediate for PSTATE field\n%v", p)
}
o1 = opirr(ctxt, AMSR)
o1 |= uint32((p.From.Offset & 0xF) << 8) /* Crm */
v := int32(0)
for i := 0; i < len(pstatefield); i++ {
if int64(pstatefield[i].a) == p.To.Offset {
v = int32(pstatefield[i].b)
break
}
}
if v == 0 {
ctxt.Diag("illegal PSTATE field for immediate move\n%v", p)
}
o1 |= uint32(v)
case 38: /* clrex [$imm] */
o1 = opimm(ctxt, p.As)
if p.To.Type == obj.TYPE_NONE {
o1 |= 0xF << 8
} else {
o1 |= uint32((p.To.Offset & 0xF) << 8)
}
case 39: /* cbz R, rel */
o1 = opirr(ctxt, p.As)
o1 |= uint32(p.From.Reg & 31)
o1 |= uint32(brdist(ctxt, p, 0, 19, 2) << 5)
case 40: /* tbz */
o1 = opirr(ctxt, p.As)
v := int32(p.From.Offset)
if v < 0 || v > 63 {
ctxt.Diag("illegal bit number\n%v", p)
}
o1 |= ((uint32(v) & 0x20) << (31 - 5)) | ((uint32(v) & 0x1F) << 19)
o1 |= uint32(brdist(ctxt, p, 0, 14, 2) << 5)
o1 |= uint32(p.Reg)
case 41: /* eret, nop, others with no operands */
o1 = op0(ctxt, p.As)
case 42: /* bfm R,r,s,R */
o1 = opbfm(ctxt, p.As, int(p.From.Offset), int(p.From3.Offset), int(p.Reg), int(p.To.Reg))
case 43: /* bfm aliases */
r := int(p.From.Offset)
s := int(p.From3.Offset)
rf := int(p.Reg)
rt := int(p.To.Reg)
if rf == 0 {
rf = rt
}
switch p.As {
case ABFI:
o1 = opbfm(ctxt, ABFM, 64-r, s-1, rf, rt)
case ABFIW:
o1 = opbfm(ctxt, ABFMW, 32-r, s-1, rf, rt)
case ABFXIL:
o1 = opbfm(ctxt, ABFM, r, r+s-1, rf, rt)
case ABFXILW:
o1 = opbfm(ctxt, ABFMW, r, r+s-1, rf, rt)
case ASBFIZ:
o1 = opbfm(ctxt, ASBFM, 64-r, s-1, rf, rt)
case ASBFIZW:
o1 = opbfm(ctxt, ASBFMW, 32-r, s-1, rf, rt)
case ASBFX:
o1 = opbfm(ctxt, ASBFM, r, r+s-1, rf, rt)
case ASBFXW:
o1 = opbfm(ctxt, ASBFMW, r, r+s-1, rf, rt)
case AUBFIZ:
o1 = opbfm(ctxt, AUBFM, 64-r, s-1, rf, rt)
case AUBFIZW:
o1 = opbfm(ctxt, AUBFMW, 32-r, s-1, rf, rt)
case AUBFX:
o1 = opbfm(ctxt, AUBFM, r, r+s-1, rf, rt)
case AUBFXW:
o1 = opbfm(ctxt, AUBFMW, r, r+s-1, rf, rt)
default:
ctxt.Diag("bad bfm alias\n%v", ctxt.Curp)
break
}
case 44: /* extr $b, Rn, Rm, Rd */
o1 = opextr(ctxt, p.As, int32(p.From.Offset), int(p.From3.Reg), int(p.Reg), int(p.To.Reg))
case 45: /* sxt/uxt[bhw] R,R; movT R,R -> sxtT R,R */
rf := int(p.From.Reg)
rt := int(p.To.Reg)
as := p.As
if rf == REGZERO {
as = AMOVWU /* clearer in disassembly */
}
switch as {
case AMOVB, ASXTB:
o1 = opbfm(ctxt, ASBFM, 0, 7, rf, rt)
case AMOVH, ASXTH:
o1 = opbfm(ctxt, ASBFM, 0, 15, rf, rt)
case AMOVW, ASXTW:
o1 = opbfm(ctxt, ASBFM, 0, 31, rf, rt)
case AMOVBU, AUXTB:
o1 = opbfm(ctxt, AUBFM, 0, 7, rf, rt)
case AMOVHU, AUXTH:
o1 = opbfm(ctxt, AUBFM, 0, 15, rf, rt)
case AMOVWU:
o1 = oprrr(ctxt, as) | (uint32(rf&31) << 16) | (REGZERO & 31 << 5) | uint32(rt&31)
case AUXTW:
o1 = opbfm(ctxt, AUBFM, 0, 31, rf, rt)
case ASXTBW:
o1 = opbfm(ctxt, ASBFMW, 0, 7, rf, rt)
case ASXTHW:
o1 = opbfm(ctxt, ASBFMW, 0, 15, rf, rt)
case AUXTBW:
o1 = opbfm(ctxt, AUBFMW, 0, 7, rf, rt)
case AUXTHW:
o1 = opbfm(ctxt, AUBFMW, 0, 15, rf, rt)
default:
ctxt.Diag("bad sxt %v", as)
break
}
case 46: /* cls */
o1 = opbit(ctxt, p.As)
o1 |= uint32(p.From.Reg&31) << 5
o1 |= uint32(p.To.Reg & 31)
case 47: /* movT R,V(R) -> strT (huge offset) */
o1 = omovlit(ctxt, AMOVW, p, &p.To, REGTMP)
if !(o1 != 0) {
break
}
r := int(p.To.Reg)
if r == 0 {
r = int(o.param)
}
o2 = olsxrr(ctxt, p.As, REGTMP, r, int(p.From.Reg))
case 48: /* movT V(R), R -> ldrT (huge offset) */
o1 = omovlit(ctxt, AMOVW, p, &p.From, REGTMP)
if !(o1 != 0) {
break
}
r := int(p.From.Reg)
if r == 0 {
r = int(o.param)
}
o2 = olsxrr(ctxt, p.As, REGTMP, r, int(p.To.Reg))
case 50: /* sys/sysl */
o1 = opirr(ctxt, p.As)
if (p.From.Offset &^ int64(SYSARG4(0x7, 0xF, 0xF, 0x7))) != 0 {
ctxt.Diag("illegal SYS argument\n%v", p)
}
o1 |= uint32(p.From.Offset)
if p.To.Type == obj.TYPE_REG {
o1 |= uint32(p.To.Reg & 31)
} else if p.Reg != 0 {
o1 |= uint32(p.Reg & 31)
} else {
o1 |= 0x1F
}
case 51: /* dmb */
o1 = opirr(ctxt, p.As)
if p.From.Type == obj.TYPE_CONST {
o1 |= uint32((p.From.Offset & 0xF) << 8)
}
case 52: /* hint */
o1 = opirr(ctxt, p.As)
o1 |= uint32((p.From.Offset & 0x7F) << 5)
case 53: /* and/or/eor/bic/... $bitcon, Rn, Rd */
a := p.As
rt := int(p.To.Reg)
r := int(p.Reg)
if r == 0 {
r = rt
}
mode := 64
v := uint64(p.From.Offset)
switch p.As {
case AANDW, AORRW, AEORW, AANDSW:
mode = 32
case ABIC, AORN, AEON, ABICS:
v = ^v
case ABICW, AORNW, AEONW, ABICSW:
v = ^v
mode = 32
}
o1 = opirr(ctxt, a)
o1 |= bitconEncode(v, mode) | uint32(r&31)<<5 | uint32(rt&31)
case 54: /* floating point arith */
o1 = oprrr(ctxt, p.As)
var rf int
if p.From.Type == obj.TYPE_CONST {
rf = chipfloat7(ctxt, p.From.Val.(float64))
if rf < 0 || true {
ctxt.Diag("invalid floating-point immediate\n%v", p)
rf = 0
}
rf |= (1 << 3)
} else {
rf = int(p.From.Reg)
}
rt := int(p.To.Reg)
r := int(p.Reg)
if (o1&(0x1F<<24)) == (0x1E<<24) && (o1&(1<<11)) == 0 { /* monadic */
r = rf
rf = 0
} else if r == 0 {
r = rt
}
o1 |= (uint32(rf&31) << 16) | (uint32(r&31) << 5) | uint32(rt&31)
case 56: /* floating point compare */
o1 = oprrr(ctxt, p.As)
var rf int
if p.From.Type == obj.TYPE_CONST {
o1 |= 8 /* zero */
rf = 0
} else {
rf = int(p.From.Reg)
}
rt := int(p.Reg)
o1 |= uint32(rf&31)<<16 | uint32(rt&31)<<5
case 57: /* floating point conditional compare */
o1 = oprrr(ctxt, p.As)
cond := int(p.From.Reg)
nzcv := int(p.To.Offset)
if nzcv&^0xF != 0 {
ctxt.Diag("implausible condition\n%v", p)
}
rf := int(p.Reg)
if p.From3 == nil || p.From3.Reg < REG_F0 || p.From3.Reg > REG_F31 {
ctxt.Diag("illegal FCCMP\n%v", p)
break
}
rt := int(p.From3.Reg)
o1 |= uint32(rf&31)<<16 | uint32(cond)<<12 | uint32(rt&31)<<5 | uint32(nzcv)
case 58: /* ldar/ldxr/ldaxr */
o1 = opload(ctxt, p.As)
o1 |= 0x1F << 16
o1 |= uint32(p.From.Reg) << 5
if p.Reg != 0 {
o1 |= uint32(p.Reg) << 10
} else {
o1 |= 0x1F << 10
}
o1 |= uint32(p.To.Reg & 31)
case 59: /* stxr/stlxr */
o1 = opstore(ctxt, p.As)
if p.RegTo2 != obj.REG_NONE {
o1 |= uint32(p.RegTo2&31) << 16
} else {
o1 |= 0x1F << 16
}
// TODO(aram): add support for STXP
o1 |= uint32(p.To.Reg&31) << 5
o1 |= uint32(p.From.Reg & 31)
case 60: /* adrp label,r */
d := brdist(ctxt, p, 12, 21, 0)
o1 = ADR(1, uint32(d), uint32(p.To.Reg))
case 61: /* adr label, r */
d := brdist(ctxt, p, 0, 21, 0)
o1 = ADR(0, uint32(d), uint32(p.To.Reg))
case 62: /* op $movcon, [R], R -> mov $movcon, REGTMP + op REGTMP, [R], R */
if p.Reg == REGTMP {
ctxt.Diag("cannot use REGTMP as source: %v\n", p)
}
o1 = omovconst(ctxt, AMOVD, p, &p.From, REGTMP)
rt := int(p.To.Reg)
if p.To.Type == obj.TYPE_NONE {
rt = REGZERO
}
r := int(p.Reg)
if r == 0 {
r = rt
}
if p.To.Type != obj.TYPE_NONE && (p.To.Reg == REGSP || r == REGSP) {
o2 = opxrrr(ctxt, p.As)
o2 |= REGTMP & 31 << 16
o2 |= LSL0_64
} else {
o2 = oprrr(ctxt, p.As)
o2 |= REGTMP & 31 << 16 /* shift is 0 */
}
o2 |= uint32(r&31) << 5
o2 |= uint32(rt & 31)
/* reloc ops */
case 64: /* movT R,addr -> adrp + add + movT R, (REGTMP) */
o1 = ADR(1, 0, REGTMP)
o2 = opirr(ctxt, AADD) | REGTMP&31<<5 | REGTMP&31
rel := obj.Addrel(ctxt.Cursym)
rel.Off = int32(ctxt.Pc)
rel.Siz = 8
rel.Sym = p.To.Sym
rel.Add = p.To.Offset
rel.Type = obj.R_ADDRARM64
o3 = olsr12u(ctxt, int32(opstr12(ctxt, p.As)), 0, REGTMP, int(p.From.Reg))
case 65: /* movT addr,R -> adrp + add + movT (REGTMP), R */
o1 = ADR(1, 0, REGTMP)
o2 = opirr(ctxt, AADD) | REGTMP&31<<5 | REGTMP&31
rel := obj.Addrel(ctxt.Cursym)
rel.Off = int32(ctxt.Pc)
rel.Siz = 8
rel.Sym = p.From.Sym
rel.Add = p.From.Offset
rel.Type = obj.R_ADDRARM64
o3 = olsr12u(ctxt, int32(opldr12(ctxt, p.As)), 0, REGTMP, int(p.To.Reg))
case 66: /* ldp O(R)!, (r1, r2); ldp (R)O!, (r1, r2) */
v := int32(p.From.Offset)
if v < -512 || v > 504 {
ctxt.Diag("offset out of range\n%v", p)
}
if o.scond == C_XPOST {
o1 |= 1 << 23
} else {
o1 |= 3 << 23
}
o1 |= 1 << 22
o1 |= uint32(int64(2<<30|5<<27|((uint32(v)/8)&0x7f)<<15) | p.To.Offset<<10 | int64(uint32(p.From.Reg&31)<<5) | int64(p.To.Reg&31))
case 67: /* stp (r1, r2), O(R)!; stp (r1, r2), (R)O! */
v := int32(p.To.Offset)
if v < -512 || v > 504 {
ctxt.Diag("offset out of range\n%v", p)
}
if o.scond == C_XPOST {
o1 |= 1 << 23
} else {
o1 |= 3 << 23
}
o1 |= uint32(int64(2<<30|5<<27|((uint32(v)/8)&0x7f)<<15) | p.From.Offset<<10 | int64(uint32(p.To.Reg&31)<<5) | int64(p.From.Reg&31))
case 68: /* movT $vconaddr(SB), reg -> adrp + add + reloc */
if p.As == AMOVW {
ctxt.Diag("invalid load of 32-bit address: %v", p)
}
o1 = ADR(1, 0, uint32(p.To.Reg))
o2 = opirr(ctxt, AADD) | uint32(p.To.Reg&31)<<5 | uint32(p.To.Reg&31)
rel := obj.Addrel(ctxt.Cursym)
rel.Off = int32(ctxt.Pc)
rel.Siz = 8
rel.Sym = p.From.Sym
rel.Add = p.From.Offset
rel.Type = obj.R_ADDRARM64
case 69: /* LE model movd $tlsvar, reg -> movz reg, 0 + reloc */
o1 = opirr(ctxt, AMOVZ)
o1 |= uint32(p.To.Reg & 31)
rel := obj.Addrel(ctxt.Cursym)
rel.Off = int32(ctxt.Pc)
rel.Siz = 4
rel.Sym = p.From.Sym
rel.Type = obj.R_ARM64_TLS_LE
if p.From.Offset != 0 {
ctxt.Diag("invalid offset on MOVW $tlsvar")
}
case 70: /* IE model movd $tlsvar, reg -> adrp REGTMP, 0; ldr reg, [REGTMP, #0] + relocs */
o1 = ADR(1, 0, REGTMP)
o2 = olsr12u(ctxt, int32(opldr12(ctxt, AMOVD)), 0, REGTMP, int(p.To.Reg))
rel := obj.Addrel(ctxt.Cursym)
rel.Off = int32(ctxt.Pc)
rel.Siz = 8
rel.Sym = p.From.Sym
rel.Add = 0
rel.Type = obj.R_ARM64_TLS_IE
if p.From.Offset != 0 {
ctxt.Diag("invalid offset on MOVW $tlsvar")
}
case 71: /* movd sym@GOT, reg -> adrp REGTMP, #0; ldr reg, [REGTMP, #0] + relocs */
o1 = ADR(1, 0, REGTMP)
o2 = olsr12u(ctxt, int32(opldr12(ctxt, AMOVD)), 0, REGTMP, int(p.To.Reg))
rel := obj.Addrel(ctxt.Cursym)
rel.Off = int32(ctxt.Pc)
rel.Siz = 8
rel.Sym = p.From.Sym
rel.Add = 0
rel.Type = obj.R_ARM64_GOTPCREL
// This is supposed to be something that stops execution.
// It's not supposed to be reached, ever, but if it is, we'd
// like to be able to tell how we got there. Assemble as
// 0xbea71700 which is guaranteed to raise undefined instruction
// exception.
case 90:
o1 = 0xbea71700
break
}
out[0] = o1
out[1] = o2
out[2] = o3
out[3] = o4
out[4] = o5
return
}
/*
* basic Rm op Rn -> Rd (using shifted register with 0)
* also op Rn -> Rt
* also Rm*Rn op Ra -> Rd
*/
func oprrr(ctxt *obj.Link, a obj.As) uint32 {
switch a {
case AADC:
return S64 | 0<<30 | 0<<29 | 0xd0<<21 | 0<<10
case AADCW:
return S32 | 0<<30 | 0<<29 | 0xd0<<21 | 0<<10
case AADCS:
return S64 | 0<<30 | 1<<29 | 0xd0<<21 | 0<<10
case AADCSW:
return S32 | 0<<30 | 1<<29 | 0xd0<<21 | 0<<10
case ANGC, ASBC:
return S64 | 1<<30 | 0<<29 | 0xd0<<21 | 0<<10
case ANGCS, ASBCS:
return S64 | 1<<30 | 1<<29 | 0xd0<<21 | 0<<10
case ANGCW, ASBCW:
return S32 | 1<<30 | 0<<29 | 0xd0<<21 | 0<<10
case ANGCSW, ASBCSW:
return S32 | 1<<30 | 1<<29 | 0xd0<<21 | 0<<10
case AADD:
return S64 | 0<<30 | 0<<29 | 0x0b<<24 | 0<<22 | 0<<21 | 0<<10
case AADDW:
return S32 | 0<<30 | 0<<29 | 0x0b<<24 | 0<<22 | 0<<21 | 0<<10
case ACMN, AADDS:
return S64 | 0<<30 | 1<<29 | 0x0b<<24 | 0<<22 | 0<<21 | 0<<10
case ACMNW, AADDSW:
return S32 | 0<<30 | 1<<29 | 0x0b<<24 | 0<<22 | 0<<21 | 0<<10
case ASUB:
return S64 | 1<<30 | 0<<29 | 0x0b<<24 | 0<<22 | 0<<21 | 0<<10
case ASUBW:
return S32 | 1<<30 | 0<<29 | 0x0b<<24 | 0<<22 | 0<<21 | 0<<10
case ACMP, ASUBS:
return S64 | 1<<30 | 1<<29 | 0x0b<<24 | 0<<22 | 0<<21 | 0<<10
case ACMPW, ASUBSW:
return S32 | 1<<30 | 1<<29 | 0x0b<<24 | 0<<22 | 0<<21 | 0<<10
case AAND:
return S64 | 0<<29 | 0xA<<24
case AANDW:
return S32 | 0<<29 | 0xA<<24
case AMOVD, AORR:
return S64 | 1<<29 | 0xA<<24
// case AMOVW:
case AMOVWU, AORRW:
return S32 | 1<<29 | 0xA<<24
case AEOR:
return S64 | 2<<29 | 0xA<<24
case AEORW:
return S32 | 2<<29 | 0xA<<24
case AANDS:
return S64 | 3<<29 | 0xA<<24
case AANDSW:
return S32 | 3<<29 | 0xA<<24
case ABIC:
return S64 | 0<<29 | 0xA<<24 | 1<<21
case ABICW:
return S32 | 0<<29 | 0xA<<24 | 1<<21
case ABICS:
return S64 | 3<<29 | 0xA<<24 | 1<<21
case ABICSW:
return S32 | 3<<29 | 0xA<<24 | 1<<21
case AEON:
return S64 | 2<<29 | 0xA<<24 | 1<<21
case AEONW:
return S32 | 2<<29 | 0xA<<24 | 1<<21
case AMVN, AORN:
return S64 | 1<<29 | 0xA<<24 | 1<<21
case AMVNW, AORNW:
return S32 | 1<<29 | 0xA<<24 | 1<<21
case AASR:
return S64 | OPDP2(10) /* also ASRV */
case AASRW:
return S32 | OPDP2(10)
case ALSL:
return S64 | OPDP2(8)
case ALSLW:
return S32 | OPDP2(8)
case ALSR:
return S64 | OPDP2(9)
case ALSRW:
return S32 | OPDP2(9)
case AROR:
return S64 | OPDP2(11)
case ARORW:
return S32 | OPDP2(11)
case ACCMN:
return S64 | 0<<30 | 1<<29 | 0xD2<<21 | 0<<11 | 0<<10 | 0<<4 /* cond<<12 | nzcv<<0 */
case ACCMNW:
return S32 | 0<<30 | 1<<29 | 0xD2<<21 | 0<<11 | 0<<10 | 0<<4
case ACCMP:
return S64 | 1<<30 | 1<<29 | 0xD2<<21 | 0<<11 | 0<<10 | 0<<4 /* imm5<<16 | cond<<12 | nzcv<<0 */
case ACCMPW:
return S32 | 1<<30 | 1<<29 | 0xD2<<21 | 0<<11 | 0<<10 | 0<<4
case ACRC32B:
return S32 | OPDP2(16)
case ACRC32H:
return S32 | OPDP2(17)
case ACRC32W:
return S32 | OPDP2(18)
case ACRC32X:
return S64 | OPDP2(19)
case ACRC32CB:
return S32 | OPDP2(20)
case ACRC32CH:
return S32 | OPDP2(21)
case ACRC32CW:
return S32 | OPDP2(22)
case ACRC32CX:
return S64 | OPDP2(23)
case ACSEL:
return S64 | 0<<30 | 0<<29 | 0xD4<<21 | 0<<11 | 0<<10
case ACSELW:
return S32 | 0<<30 | 0<<29 | 0xD4<<21 | 0<<11 | 0<<10
case ACSET:
return S64 | 0<<30 | 0<<29 | 0xD4<<21 | 0<<11 | 1<<10
case ACSETW:
return S32 | 0<<30 | 0<<29 | 0xD4<<21 | 0<<11 | 1<<10
case ACSETM:
return S64 | 1<<30 | 0<<29 | 0xD4<<21 | 0<<11 | 0<<10
case ACSETMW:
return S32 | 1<<30 | 0<<29 | 0xD4<<21 | 0<<11 | 0<<10
case ACINC, ACSINC:
return S64 | 0<<30 | 0<<29 | 0xD4<<21 | 0<<11 | 1<<10
case ACINCW, ACSINCW:
return S32 | 0<<30 | 0<<29 | 0xD4<<21 | 0<<11 | 1<<10
case ACINV, ACSINV:
return S64 | 1<<30 | 0<<29 | 0xD4<<21 | 0<<11 | 0<<10
case ACINVW, ACSINVW:
return S32 | 1<<30 | 0<<29 | 0xD4<<21 | 0<<11 | 0<<10
case ACNEG, ACSNEG:
return S64 | 1<<30 | 0<<29 | 0xD4<<21 | 0<<11 | 1<<10
case ACNEGW, ACSNEGW:
return S32 | 1<<30 | 0<<29 | 0xD4<<21 | 0<<11 | 1<<10
case AMUL, AMADD:
return S64 | 0<<29 | 0x1B<<24 | 0<<21 | 0<<15
case AMULW, AMADDW:
return S32 | 0<<29 | 0x1B<<24 | 0<<21 | 0<<15
case AMNEG, AMSUB:
return S64 | 0<<29 | 0x1B<<24 | 0<<21 | 1<<15
case AMNEGW, AMSUBW:
return S32 | 0<<29 | 0x1B<<24 | 0<<21 | 1<<15
case AMRS:
return SYSOP(1, 2, 0, 0, 0, 0, 0)
case AMSR:
return SYSOP(0, 2, 0, 0, 0, 0, 0)
case ANEG:
return S64 | 1<<30 | 0<<29 | 0xB<<24 | 0<<21
case ANEGW:
return S32 | 1<<30 | 0<<29 | 0xB<<24 | 0<<21
case ANEGS:
return S64 | 1<<30 | 1<<29 | 0xB<<24 | 0<<21
case ANEGSW:
return S32 | 1<<30 | 1<<29 | 0xB<<24 | 0<<21
case AREM, ASDIV:
return S64 | OPDP2(3)
case AREMW, ASDIVW:
return S32 | OPDP2(3)
case ASMULL, ASMADDL:
return OPDP3(1, 0, 1, 0)
case ASMNEGL, ASMSUBL:
return OPDP3(1, 0, 1, 1)
case ASMULH:
return OPDP3(1, 0, 2, 0)
case AUMULL, AUMADDL:
return OPDP3(1, 0, 5, 0)
case AUMNEGL, AUMSUBL:
return OPDP3(1, 0, 5, 1)
case AUMULH:
return OPDP3(1, 0, 6, 0)
case AUREM, AUDIV:
return S64 | OPDP2(2)
case AUREMW, AUDIVW:
return S32 | OPDP2(2)
case AAESE:
return 0x4E<<24 | 2<<20 | 8<<16 | 4<<12 | 2<<10
case AAESD:
return 0x4E<<24 | 2<<20 | 8<<16 | 5<<12 | 2<<10
case AAESMC:
return 0x4E<<24 | 2<<20 | 8<<16 | 6<<12 | 2<<10
case AAESIMC:
return 0x4E<<24 | 2<<20 | 8<<16 | 7<<12 | 2<<10
case ASHA1C:
return 0x5E<<24 | 0<<12
case ASHA1P:
return 0x5E<<24 | 1<<12
case ASHA1M:
return 0x5E<<24 | 2<<12
case ASHA1SU0:
return 0x5E<<24 | 3<<12
case ASHA256H:
return 0x5E<<24 | 4<<12
case ASHA256H2:
return 0x5E<<24 | 5<<12
case ASHA256SU1:
return 0x5E<<24 | 6<<12
case ASHA1H:
return 0x5E<<24 | 2<<20 | 8<<16 | 0<<12 | 2<<10
case ASHA1SU1:
return 0x5E<<24 | 2<<20 | 8<<16 | 1<<12 | 2<<10
case ASHA256SU0:
return 0x5E<<24 | 2<<20 | 8<<16 | 2<<12 | 2<<10
case AFCVTZSD:
return FPCVTI(1, 0, 1, 3, 0)
case AFCVTZSDW:
return FPCVTI(0, 0, 1, 3, 0)
case AFCVTZSS:
return FPCVTI(1, 0, 0, 3, 0)
case AFCVTZSSW:
return FPCVTI(0, 0, 0, 3, 0)
case AFCVTZUD:
return FPCVTI(1, 0, 1, 3, 1)
case AFCVTZUDW:
return FPCVTI(0, 0, 1, 3, 1)
case AFCVTZUS:
return FPCVTI(1, 0, 0, 3, 1)
case AFCVTZUSW:
return FPCVTI(0, 0, 0, 3, 1)
case ASCVTFD:
return FPCVTI(1, 0, 1, 0, 2)
case ASCVTFS:
return FPCVTI(1, 0, 0, 0, 2)
case ASCVTFWD:
return FPCVTI(0, 0, 1, 0, 2)
case ASCVTFWS:
return FPCVTI(0, 0, 0, 0, 2)
case AUCVTFD:
return FPCVTI(1, 0, 1, 0, 3)
case AUCVTFS:
return FPCVTI(1, 0, 0, 0, 3)
case AUCVTFWD:
return FPCVTI(0, 0, 1, 0, 3)
case AUCVTFWS:
return FPCVTI(0, 0, 0, 0, 3)
case AFADDS:
return FPOP2S(0, 0, 0, 2)
case AFADDD:
return FPOP2S(0, 0, 1, 2)
case AFSUBS:
return FPOP2S(0, 0, 0, 3)
case AFSUBD:
return FPOP2S(0, 0, 1, 3)
case AFMULS:
return FPOP2S(0, 0, 0, 0)
case AFMULD:
return FPOP2S(0, 0, 1, 0)
case AFDIVS:
return FPOP2S(0, 0, 0, 1)
case AFDIVD:
return FPOP2S(0, 0, 1, 1)
case AFMAXS:
return FPOP2S(0, 0, 0, 4)
case AFMINS:
return FPOP2S(0, 0, 0, 5)
case AFMAXD:
return FPOP2S(0, 0, 1, 4)
case AFMIND:
return FPOP2S(0, 0, 1, 5)
case AFMAXNMS:
return FPOP2S(0, 0, 0, 6)
case AFMAXNMD:
return FPOP2S(0, 0, 1, 6)
case AFMINNMS:
return FPOP2S(0, 0, 0, 7)
case AFMINNMD:
return FPOP2S(0, 0, 1, 7)
case AFNMULS:
return FPOP2S(0, 0, 0, 8)
case AFNMULD:
return FPOP2S(0, 0, 1, 8)
case AFCMPS:
return FPCMP(0, 0, 0, 0, 0)
case AFCMPD:
return FPCMP(0, 0, 1, 0, 0)
case AFCMPES:
return FPCMP(0, 0, 0, 0, 16)
case AFCMPED:
return FPCMP(0, 0, 1, 0, 16)
case AFCCMPS:
return FPCCMP(0, 0, 0, 0)
case AFCCMPD:
return FPCCMP(0, 0, 1, 0)
case AFCCMPES:
return FPCCMP(0, 0, 0, 1)
case AFCCMPED:
return FPCCMP(0, 0, 1, 1)
case AFCSELS:
return 0x1E<<24 | 0<<22 | 1<<21 | 3<<10
case AFCSELD:
return 0x1E<<24 | 1<<22 | 1<<21 | 3<<10
case AFMOVS:
return FPOP1S(0, 0, 0, 0)
case AFABSS:
return FPOP1S(0, 0, 0, 1)
case AFNEGS:
return FPOP1S(0, 0, 0, 2)
case AFSQRTS:
return FPOP1S(0, 0, 0, 3)
case AFCVTSD:
return FPOP1S(0, 0, 0, 5)
case AFCVTSH:
return FPOP1S(0, 0, 0, 7)
case AFRINTNS:
return FPOP1S(0, 0, 0, 8)
case AFRINTPS:
return FPOP1S(0, 0, 0, 9)
case AFRINTMS:
return FPOP1S(0, 0, 0, 10)
case AFRINTZS:
return FPOP1S(0, 0, 0, 11)
case AFRINTAS:
return FPOP1S(0, 0, 0, 12)
case AFRINTXS:
return FPOP1S(0, 0, 0, 14)
case AFRINTIS:
return FPOP1S(0, 0, 0, 15)
case AFMOVD:
return FPOP1S(0, 0, 1, 0)
case AFABSD:
return FPOP1S(0, 0, 1, 1)
case AFNEGD:
return FPOP1S(0, 0, 1, 2)
case AFSQRTD:
return FPOP1S(0, 0, 1, 3)
case AFCVTDS:
return FPOP1S(0, 0, 1, 4)
case AFCVTDH:
return FPOP1S(0, 0, 1, 7)
case AFRINTND:
return FPOP1S(0, 0, 1, 8)
case AFRINTPD:
return FPOP1S(0, 0, 1, 9)
case AFRINTMD:
return FPOP1S(0, 0, 1, 10)
case AFRINTZD:
return FPOP1S(0, 0, 1, 11)
case AFRINTAD:
return FPOP1S(0, 0, 1, 12)
case AFRINTXD:
return FPOP1S(0, 0, 1, 14)
case AFRINTID:
return FPOP1S(0, 0, 1, 15)
case AFCVTHS:
return FPOP1S(0, 0, 3, 4)
case AFCVTHD:
return FPOP1S(0, 0, 3, 5)
}
ctxt.Diag("bad rrr %d %v", a, a)
prasm(ctxt.Curp)
return 0
}
/*
* imm -> Rd
* imm op Rn -> Rd
*/
func opirr(ctxt *obj.Link, a obj.As) uint32 {
switch a {
/* op $addcon, Rn, Rd */
case AMOVD, AADD:
return S64 | 0<<30 | 0<<29 | 0x11<<24
case ACMN, AADDS:
return S64 | 0<<30 | 1<<29 | 0x11<<24
case AMOVW, AADDW:
return S32 | 0<<30 | 0<<29 | 0x11<<24
case ACMNW, AADDSW:
return S32 | 0<<30 | 1<<29 | 0x11<<24
case ASUB:
return S64 | 1<<30 | 0<<29 | 0x11<<24
case ACMP, ASUBS:
return S64 | 1<<30 | 1<<29 | 0x11<<24
case ASUBW:
return S32 | 1<<30 | 0<<29 | 0x11<<24
case ACMPW, ASUBSW:
return S32 | 1<<30 | 1<<29 | 0x11<<24
/* op $imm(SB), Rd; op label, Rd */
case AADR:
return 0<<31 | 0x10<<24
case AADRP:
return 1<<31 | 0x10<<24
/* op $bimm, Rn, Rd */
case AAND, ABIC:
return S64 | 0<<29 | 0x24<<23
case AANDW, ABICW:
return S32 | 0<<29 | 0x24<<23 | 0<<22
case AORR, AORN:
return S64 | 1<<29 | 0x24<<23
case AORRW, AORNW:
return S32 | 1<<29 | 0x24<<23 | 0<<22
case AEOR, AEON:
return S64 | 2<<29 | 0x24<<23
case AEORW, AEONW:
return S32 | 2<<29 | 0x24<<23 | 0<<22
case AANDS, ABICS:
return S64 | 3<<29 | 0x24<<23
case AANDSW, ABICSW:
return S32 | 3<<29 | 0x24<<23 | 0<<22
case AASR:
return S64 | 0<<29 | 0x26<<23 /* alias of SBFM */
case AASRW:
return S32 | 0<<29 | 0x26<<23 | 0<<22
/* op $width, $lsb, Rn, Rd */
case ABFI:
return S64 | 2<<29 | 0x26<<23 | 1<<22
/* alias of BFM */
case ABFIW:
return S32 | 2<<29 | 0x26<<23 | 0<<22
/* op $imms, $immr, Rn, Rd */
case ABFM:
return S64 | 1<<29 | 0x26<<23 | 1<<22
case ABFMW:
return S32 | 1<<29 | 0x26<<23 | 0<<22
case ASBFM:
return S64 | 0<<29 | 0x26<<23 | 1<<22
case ASBFMW:
return S32 | 0<<29 | 0x26<<23 | 0<<22
case AUBFM:
return S64 | 2<<29 | 0x26<<23 | 1<<22
case AUBFMW:
return S32 | 2<<29 | 0x26<<23 | 0<<22
case ABFXIL:
return S64 | 1<<29 | 0x26<<23 | 1<<22 /* alias of BFM */
case ABFXILW:
return S32 | 1<<29 | 0x26<<23 | 0<<22
case AEXTR:
return S64 | 0<<29 | 0x27<<23 | 1<<22 | 0<<21
case AEXTRW:
return S32 | 0<<29 | 0x27<<23 | 0<<22 | 0<<21
case ACBNZ:
return S64 | 0x1A<<25 | 1<<24
case ACBNZW:
return S32 | 0x1A<<25 | 1<<24
case ACBZ:
return S64 | 0x1A<<25 | 0<<24
case ACBZW:
return S32 | 0x1A<<25 | 0<<24
case ACCMN:
return S64 | 0<<30 | 1<<29 | 0xD2<<21 | 1<<11 | 0<<10 | 0<<4 /* imm5<<16 | cond<<12 | nzcv<<0 */
case ACCMNW:
return S32 | 0<<30 | 1<<29 | 0xD2<<21 | 1<<11 | 0<<10 | 0<<4
case ACCMP:
return S64 | 1<<30 | 1<<29 | 0xD2<<21 | 1<<11 | 0<<10 | 0<<4 /* imm5<<16 | cond<<12 | nzcv<<0 */
case ACCMPW:
return S32 | 1<<30 | 1<<29 | 0xD2<<21 | 1<<11 | 0<<10 | 0<<4
case AMOVK:
return S64 | 3<<29 | 0x25<<23
case AMOVKW:
return S32 | 3<<29 | 0x25<<23
case AMOVN:
return S64 | 0<<29 | 0x25<<23
case AMOVNW:
return S32 | 0<<29 | 0x25<<23
case AMOVZ:
return S64 | 2<<29 | 0x25<<23
case AMOVZW:
return S32 | 2<<29 | 0x25<<23
case AMSR:
return SYSOP(0, 0, 0, 4, 0, 0, 0x1F) /* MSR (immediate) */
case AAT,
ADC,
AIC,
ATLBI,
ASYS:
return SYSOP(0, 1, 0, 0, 0, 0, 0)
case ASYSL:
return SYSOP(1, 1, 0, 0, 0, 0, 0)
case ATBZ:
return 0x36 << 24
case ATBNZ:
return 0x37 << 24
case ADSB:
return SYSOP(0, 0, 3, 3, 0, 4, 0x1F)
case ADMB:
return SYSOP(0, 0, 3, 3, 0, 5, 0x1F)
case AISB:
return SYSOP(0, 0, 3, 3, 0, 6, 0x1F)
case AHINT:
return SYSOP(0, 0, 3, 2, 0, 0, 0x1F)
}
ctxt.Diag("bad irr %v", a)
prasm(ctxt.Curp)
return 0
}
func opbit(ctxt *obj.Link, a obj.As) uint32 {
switch a {
case ACLS:
return S64 | OPBIT(5)
case ACLSW:
return S32 | OPBIT(5)
case ACLZ:
return S64 | OPBIT(4)
case ACLZW:
return S32 | OPBIT(4)
case ARBIT:
return S64 | OPBIT(0)
case ARBITW:
return S32 | OPBIT(0)
case AREV:
return S64 | OPBIT(3)
case AREVW:
return S32 | OPBIT(2)
case AREV16:
return S64 | OPBIT(1)
case AREV16W:
return S32 | OPBIT(1)
case AREV32:
return S64 | OPBIT(2)
default:
ctxt.Diag("bad bit op\n%v", ctxt.Curp)
return 0
}
}
/*
* add/subtract extended register
*/
func opxrrr(ctxt *obj.Link, a obj.As) uint32 {
switch a {
case AADD:
return S64 | 0<<30 | 0<<29 | 0x0b<<24 | 0<<22 | 1<<21 | LSL0_64
case AADDW:
return S32 | 0<<30 | 0<<29 | 0x0b<<24 | 0<<22 | 1<<21 | LSL0_32
case ACMN, AADDS:
return S64 | 0<<30 | 1<<29 | 0x0b<<24 | 0<<22 | 1<<21 | LSL0_64
case ACMNW, AADDSW:
return S32 | 0<<30 | 1<<29 | 0x0b<<24 | 0<<22 | 1<<21 | LSL0_32
case ASUB:
return S64 | 1<<30 | 0<<29 | 0x0b<<24 | 0<<22 | 1<<21 | LSL0_64
case ASUBW:
return S32 | 1<<30 | 0<<29 | 0x0b<<24 | 0<<22 | 1<<21 | LSL0_32
case ACMP, ASUBS:
return S64 | 1<<30 | 1<<29 | 0x0b<<24 | 0<<22 | 1<<21 | LSL0_64
case ACMPW, ASUBSW:
return S32 | 1<<30 | 1<<29 | 0x0b<<24 | 0<<22 | 1<<21 | LSL0_32
}
ctxt.Diag("bad opxrrr %v\n%v", a, ctxt.Curp)
return 0
}
func opimm(ctxt *obj.Link, a obj.As) uint32 {
switch a {
case ASVC:
return 0xD4<<24 | 0<<21 | 1 /* imm16<<5 */
case AHVC:
return 0xD4<<24 | 0<<21 | 2
case ASMC:
return 0xD4<<24 | 0<<21 | 3
case ABRK:
return 0xD4<<24 | 1<<21 | 0
case AHLT:
return 0xD4<<24 | 2<<21 | 0
case ADCPS1:
return 0xD4<<24 | 5<<21 | 1
case ADCPS2:
return 0xD4<<24 | 5<<21 | 2
case ADCPS3:
return 0xD4<<24 | 5<<21 | 3
case ACLREX:
return SYSOP(0, 0, 3, 3, 0, 2, 0x1F)
}
ctxt.Diag("bad imm %v", a)
prasm(ctxt.Curp)
return 0
}
func brdist(ctxt *obj.Link, p *obj.Prog, preshift int, flen int, shift int) int64 {
v := int64(0)
t := int64(0)
if p.Pcond != nil {
v = (p.Pcond.Pc >> uint(preshift)) - (ctxt.Pc >> uint(preshift))
if (v & ((1 << uint(shift)) - 1)) != 0 {
ctxt.Diag("misaligned label\n%v", p)
}
v >>= uint(shift)
t = int64(1) << uint(flen-1)
if v < -t || v >= t {
ctxt.Diag("branch too far %#x vs %#x [%p]\n%v\n%v", v, t, ctxt.Blitrl, p, p.Pcond)
panic("branch too far")
}
}
return v & ((t << 1) - 1)
}
/*
* pc-relative branches
*/
func opbra(ctxt *obj.Link, a obj.As) uint32 {
switch a {
case ABEQ:
return OPBcc(0x0)
case ABNE:
return OPBcc(0x1)
case ABCS:
return OPBcc(0x2)
case ABHS:
return OPBcc(0x2)
case ABCC:
return OPBcc(0x3)
case ABLO:
return OPBcc(0x3)
case ABMI:
return OPBcc(0x4)
case ABPL:
return OPBcc(0x5)
case ABVS:
return OPBcc(0x6)
case ABVC:
return OPBcc(0x7)
case ABHI:
return OPBcc(0x8)
case ABLS:
return OPBcc(0x9)
case ABGE:
return OPBcc(0xa)
case ABLT:
return OPBcc(0xb)
case ABGT:
return OPBcc(0xc)
case ABLE:
return OPBcc(0xd) /* imm19<<5 | cond */
case AB:
return 0<<31 | 5<<26 /* imm26 */
case obj.ADUFFZERO, obj.ADUFFCOPY, ABL:
return 1<<31 | 5<<26
}
ctxt.Diag("bad bra %v", a)
prasm(ctxt.Curp)
return 0
}
func opbrr(ctxt *obj.Link, a obj.As) uint32 {
switch a {
case ABL:
return OPBLR(1) /* BLR */
case AB:
return OPBLR(0) /* BR */
case obj.ARET:
return OPBLR(2) /* RET */
}
ctxt.Diag("bad brr %v", a)
prasm(ctxt.Curp)
return 0
}
func op0(ctxt *obj.Link, a obj.As) uint32 {
switch a {
case ADRPS:
return 0x6B<<25 | 5<<21 | 0x1F<<16 | 0x1F<<5
case AERET:
return 0x6B<<25 | 4<<21 | 0x1F<<16 | 0<<10 | 0x1F<<5
// case ANOP:
// return SYSHINT(0)
case AYIELD:
return SYSHINT(1)
case AWFE:
return SYSHINT(2)
case AWFI:
return SYSHINT(3)
case ASEV:
return SYSHINT(4)
case ASEVL:
return SYSHINT(5)
}
ctxt.Diag("bad op0 %v", a)
prasm(ctxt.Curp)
return 0
}
/*
* register offset
*/
func opload(ctxt *obj.Link, a obj.As) uint32 {
switch a {
case ALDAR:
return LDSTX(3, 1, 1, 0, 1) | 0x1F<<10
case ALDARW:
return LDSTX(2, 1, 1, 0, 1) | 0x1F<<10
case ALDARB:
return LDSTX(0, 1, 1, 0, 1) | 0x1F<<10
case ALDARH:
return LDSTX(1, 1, 1, 0, 1) | 0x1F<<10
case ALDAXP:
return LDSTX(3, 0, 1, 1, 1)
case ALDAXPW:
return LDSTX(2, 0, 1, 1, 1)
case ALDAXR:
return LDSTX(3, 0, 1, 0, 1) | 0x1F<<10
case ALDAXRW:
return LDSTX(2, 0, 1, 0, 1) | 0x1F<<10
case ALDAXRB:
return LDSTX(0, 0, 1, 0, 1) | 0x1F<<10
case ALDAXRH:
return LDSTX(1, 0, 1, 0, 1) | 0x1F<<10
case ALDXR:
return LDSTX(3, 0, 1, 0, 0) | 0x1F<<10
case ALDXRB:
return LDSTX(0, 0, 1, 0, 0) | 0x1F<<10
case ALDXRH:
return LDSTX(1, 0, 1, 0, 0) | 0x1F<<10
case ALDXRW:
return LDSTX(2, 0, 1, 0, 0) | 0x1F<<10
case ALDXP:
return LDSTX(3, 0, 1, 1, 0)
case ALDXPW:
return LDSTX(2, 0, 1, 1, 0)
case AMOVNP:
return S64 | 0<<30 | 5<<27 | 0<<26 | 0<<23 | 1<<22
case AMOVNPW:
return S32 | 0<<30 | 5<<27 | 0<<26 | 0<<23 | 1<<22
}
ctxt.Diag("bad opload %v\n%v", a, ctxt.Curp)
return 0
}
func opstore(ctxt *obj.Link, a obj.As) uint32 {
switch a {
case ASTLR:
return LDSTX(3, 1, 0, 0, 1) | 0x1F<<10
case ASTLRB:
return LDSTX(0, 1, 0, 0, 1) | 0x1F<<10
case ASTLRH:
return LDSTX(1, 1, 0, 0, 1) | 0x1F<<10
case ASTLP:
return LDSTX(3, 0, 0, 1, 1)
case ASTLPW:
return LDSTX(2, 0, 0, 1, 1)
case ASTLRW:
return LDSTX(2, 1, 0, 0, 1) | 0x1F<<10
case ASTLXP:
return LDSTX(2, 0, 0, 1, 1)
case ASTLXPW:
return LDSTX(3, 0, 0, 1, 1)
case ASTLXR:
return LDSTX(3, 0, 0, 0, 1) | 0x1F<<10
case ASTLXRB:
return LDSTX(0, 0, 0, 0, 1) | 0x1F<<10
case ASTLXRH:
return LDSTX(1, 0, 0, 0, 1) | 0x1F<<10
case ASTLXRW:
return LDSTX(2, 0, 0, 0, 1) | 0x1F<<10
case ASTXR:
return LDSTX(3, 0, 0, 0, 0) | 0x1F<<10
case ASTXRB:
return LDSTX(0, 0, 0, 0, 0) | 0x1F<<10
case ASTXRH:
return LDSTX(1, 0, 0, 0, 0) | 0x1F<<10
case ASTXP:
return LDSTX(3, 0, 0, 1, 0)
case ASTXPW:
return LDSTX(2, 0, 0, 1, 0)
case ASTXRW:
return LDSTX(2, 0, 0, 0, 0) | 0x1F<<10
case AMOVNP:
return S64 | 0<<30 | 5<<27 | 0<<26 | 0<<23 | 1<<22
case AMOVNPW:
return S32 | 0<<30 | 5<<27 | 0<<26 | 0<<23 | 1<<22
}
ctxt.Diag("bad opstore %v\n%v", a, ctxt.Curp)
return 0
}
/*
* load/store register (unsigned immediate) C3.3.13
* these produce 64-bit values (when there's an option)
*/
func olsr12u(ctxt *obj.Link, o int32, v int32, b int, r int) uint32 {
if v < 0 || v >= (1<<12) {
ctxt.Diag("offset out of range: %d\n%v", v, ctxt.Curp)
}
o |= (v & 0xFFF) << 10
o |= int32(b&31) << 5
o |= int32(r & 31)
return uint32(o)
}
func opldr12(ctxt *obj.Link, a obj.As) uint32 {
switch a {
case AMOVD:
return LDSTR12U(3, 0, 1) /* imm12<<10 | Rn<<5 | Rt */
case AMOVW:
return LDSTR12U(2, 0, 2)
case AMOVWU:
return LDSTR12U(2, 0, 1)
case AMOVH:
return LDSTR12U(1, 0, 2)
case AMOVHU:
return LDSTR12U(1, 0, 1)
case AMOVB:
return LDSTR12U(0, 0, 2)
case AMOVBU:
return LDSTR12U(0, 0, 1)
case AFMOVS:
return LDSTR12U(2, 1, 1)
case AFMOVD:
return LDSTR12U(3, 1, 1)
}
ctxt.Diag("bad opldr12 %v\n%v", a, ctxt.Curp)
return 0
}
func opstr12(ctxt *obj.Link, a obj.As) uint32 {
return LD2STR(opldr12(ctxt, a))
}
/*
* load/store register (unscaled immediate) C3.3.12
*/
func olsr9s(ctxt *obj.Link, o int32, v int32, b int, r int) uint32 {
if v < -256 || v > 255 {
ctxt.Diag("offset out of range: %d\n%v", v, ctxt.Curp)
}
o |= (v & 0x1FF) << 12
o |= int32(b&31) << 5
o |= int32(r & 31)
return uint32(o)
}
func opldr9(ctxt *obj.Link, a obj.As) uint32 {
switch a {
case AMOVD:
return LDSTR9S(3, 0, 1) /* simm9<<12 | Rn<<5 | Rt */
case AMOVW:
return LDSTR9S(2, 0, 2)
case AMOVWU:
return LDSTR9S(2, 0, 1)
case AMOVH:
return LDSTR9S(1, 0, 2)
case AMOVHU:
return LDSTR9S(1, 0, 1)
case AMOVB:
return LDSTR9S(0, 0, 2)
case AMOVBU:
return LDSTR9S(0, 0, 1)
case AFMOVS:
return LDSTR9S(2, 1, 1)
case AFMOVD:
return LDSTR9S(3, 1, 1)
}
ctxt.Diag("bad opldr9 %v\n%v", a, ctxt.Curp)
return 0
}
func opstr9(ctxt *obj.Link, a obj.As) uint32 {
return LD2STR(opldr9(ctxt, a))
}
func opldrpp(ctxt *obj.Link, a obj.As) uint32 {
switch a {
case AMOVD:
return 3<<30 | 7<<27 | 0<<26 | 0<<24 | 1<<22 /* simm9<<12 | Rn<<5 | Rt */
case AMOVW:
return 2<<30 | 7<<27 | 0<<26 | 0<<24 | 2<<22
case AMOVWU:
return 2<<30 | 7<<27 | 0<<26 | 0<<24 | 1<<22
case AMOVH:
return 1<<30 | 7<<27 | 0<<26 | 0<<24 | 2<<22
case AMOVHU:
return 1<<30 | 7<<27 | 0<<26 | 0<<24 | 1<<22
case AMOVB:
return 0<<30 | 7<<27 | 0<<26 | 0<<24 | 2<<22
case AMOVBU:
return 0<<30 | 7<<27 | 0<<26 | 0<<24 | 1<<22
}
ctxt.Diag("bad opldr %v\n%v", a, ctxt.Curp)
return 0
}
/*
* load/store register (extended register)
*/
func olsxrr(ctxt *obj.Link, as obj.As, rt int, r1 int, r2 int) uint32 {
ctxt.Diag("need load/store extended register\n%v", ctxt.Curp)
return 0xffffffff
}
func oaddi(ctxt *obj.Link, o1 int32, v int32, r int, rt int) uint32 {
if (v & 0xFFF000) != 0 {
if v&0xFFF != 0 {
ctxt.Diag("%v misuses oaddi", ctxt.Curp)
}
v >>= 12
o1 |= 1 << 22
}
o1 |= ((v & 0xFFF) << 10) | (int32(r&31) << 5) | int32(rt&31)
return uint32(o1)
}
/*
* load a a literal value into dr
*/
func omovlit(ctxt *obj.Link, as obj.As, p *obj.Prog, a *obj.Addr, dr int) uint32 {
var o1 int32
if p.Pcond == nil { /* not in literal pool */
aclass(ctxt, a)
ctxt.Logf("omovlit add %d (%#x)\n", ctxt.Instoffset, uint64(ctxt.Instoffset))
/* TODO: could be clever, and use general constant builder */
o1 = int32(opirr(ctxt, AADD))
v := int32(ctxt.Instoffset)
if v != 0 && (v&0xFFF) == 0 {
v >>= 12
o1 |= 1 << 22 /* shift, by 12 */
}
o1 |= ((v & 0xFFF) << 10) | (REGZERO & 31 << 5) | int32(dr&31)
} else {
fp := 0
w := 0 /* default: 32 bit, unsigned */
switch as {
case AFMOVS:
fp = 1
case AFMOVD:
fp = 1
w = 1 /* 64 bit simd&fp */
case AMOVD:
if p.Pcond.As == ADWORD {
w = 1 /* 64 bit */
} else if p.Pcond.To.Offset < 0 {
w = 2 /* sign extend */
}
case AMOVB, AMOVH, AMOVW:
w = 2 /* 32 bit, sign-extended to 64 */
break
}
v := int32(brdist(ctxt, p, 0, 19, 2))
o1 = (int32(w) << 30) | (int32(fp) << 26) | (3 << 27)
o1 |= (v & 0x7FFFF) << 5
o1 |= int32(dr & 31)
}
return uint32(o1)
}
// load a constant (MOVCON or BITCON) in a into rt
func omovconst(ctxt *obj.Link, as obj.As, p *obj.Prog, a *obj.Addr, rt int) (o1 uint32) {
if c := oclass(a); c == C_BITCON || c == C_ABCON || c == C_ABCON0 {
// or $bitcon, REGZERO, rt
mode := 64
var as1 obj.As
switch as {
case AMOVW:
as1 = AORRW
mode = 32
case AMOVD:
as1 = AORR
}
o1 = opirr(ctxt, as1)
o1 |= bitconEncode(uint64(a.Offset), mode) | uint32(REGZERO&31)<<5 | uint32(rt&31)
return o1
}
r := 32
if as == AMOVD {
r = 64
}
d := a.Offset
s := movcon(d)
if s < 0 || s >= r {
d = ^d
s = movcon(d)
if s < 0 || s >= r {
ctxt.Diag("impossible move wide: %#x\n%v", uint64(a.Offset), p)
}
if as == AMOVD {
o1 = opirr(ctxt, AMOVN)
} else {
o1 = opirr(ctxt, AMOVNW)
}
} else {
if as == AMOVD {
o1 = opirr(ctxt, AMOVZ)
} else {
o1 = opirr(ctxt, AMOVZW)
}
}
o1 |= uint32((((d >> uint(s*16)) & 0xFFFF) << 5) | int64((uint32(s)&3)<<21) | int64(rt&31))
return o1
}
func opbfm(ctxt *obj.Link, a obj.As, r int, s int, rf int, rt int) uint32 {
var c uint32
o := opirr(ctxt, a)
if (o & (1 << 31)) == 0 {
c = 32
} else {
c = 64
}
if r < 0 || uint32(r) >= c {
ctxt.Diag("illegal bit number\n%v", ctxt.Curp)
}
o |= (uint32(r) & 0x3F) << 16
if s < 0 || uint32(s) >= c {
ctxt.Diag("illegal bit number\n%v", ctxt.Curp)
}
o |= (uint32(s) & 0x3F) << 10
o |= (uint32(rf&31) << 5) | uint32(rt&31)
return o
}
func opextr(ctxt *obj.Link, a obj.As, v int32, rn int, rm int, rt int) uint32 {
var c uint32
o := opirr(ctxt, a)
if (o & (1 << 31)) != 0 {
c = 63
} else {
c = 31
}
if v < 0 || uint32(v) > c {
ctxt.Diag("illegal bit number\n%v", ctxt.Curp)
}
o |= uint32(v) << 10
o |= uint32(rn&31) << 5
o |= uint32(rm&31) << 16
o |= uint32(rt & 31)
return o
}
/*
* size in log2(bytes)
*/
func movesize(a obj.As) int {
switch a {
case AMOVD:
return 3
case AMOVW, AMOVWU:
return 2
case AMOVH, AMOVHU:
return 1
case AMOVB, AMOVBU:
return 0
case AFMOVS:
return 2
case AFMOVD:
return 3
default:
return -1
}
}
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