mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
f59a767ccd
On most cases, the vector type (VTYPE) for the RISC-V Vector extension is supplied as an immediate value, with either of the VSETVLI or VSETIVLI instructions. There is however a third instruction VSETVL which takes the vector type from a general purpose register. That is so the type can be selected at run-time. This introduces a macro to load a (valid) vector type into a register. The syntax follows that of VSETVLI and VSETIVLI, with element size, group multiplier, then tail and mask policies.
170 lines
3.7 KiB
ArmAsm
170 lines
3.7 KiB
ArmAsm
/*
|
|
* Copyright © 2022 Rémi Denis-Courmont.
|
|
* Loosely based on earlier work copyrighted by Måns Rullgård, 2008.
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#if defined (__riscv_float_abi_soft)
|
|
#define NOHWF
|
|
#define NOHWD
|
|
#define HWF #
|
|
#define HWD #
|
|
#elif defined (__riscv_float_abi_single)
|
|
#define NOHWF #
|
|
#define NOHWD
|
|
#define HWF
|
|
#define HWD #
|
|
#else
|
|
#define NOHWF #
|
|
#define NOHWD #
|
|
#define HWF
|
|
#define HWD
|
|
#endif
|
|
|
|
.macro func sym, ext=
|
|
.text
|
|
.align 2
|
|
|
|
.option push
|
|
.ifnb \ext
|
|
.option arch, +\ext
|
|
.endif
|
|
|
|
.global \sym
|
|
.hidden \sym
|
|
.type \sym, %function
|
|
\sym:
|
|
|
|
.macro endfunc
|
|
.size \sym, . - \sym
|
|
.option pop
|
|
.previous
|
|
.purgem endfunc
|
|
.endm
|
|
.endm
|
|
|
|
.macro const sym, align=3, relocate=0
|
|
.if \relocate
|
|
.pushsection .data.rel.ro
|
|
.else
|
|
.pushsection .rodata
|
|
.endif
|
|
.align \align
|
|
\sym:
|
|
|
|
.macro endconst
|
|
.size \sym, . - \sym
|
|
.popsection
|
|
.purgem endconst
|
|
.endm
|
|
.endm
|
|
|
|
#if !defined (__riscv_zba)
|
|
/* SH{1,2,3}ADD definitions for pre-Zba assemblers */
|
|
.macro shnadd n, rd, rs1, rs2
|
|
.insn r OP, 2 * \n, 16, \rd, \rs1, \rs2
|
|
.endm
|
|
|
|
.macro sh1add rd, rs1, rs2
|
|
shnadd 1, \rd, \rs1, \rs2
|
|
.endm
|
|
|
|
.macro sh2add rd, rs1, rs2
|
|
shnadd 2, \rd, \rs1, \rs2
|
|
.endm
|
|
|
|
.macro sh3add rd, rs1, rs2
|
|
shnadd 3, \rd, \rs1, \rs2
|
|
.endm
|
|
#endif
|
|
|
|
/* Convenience macro to load a Vector type (vtype) as immediate */
|
|
.macro lvtypei rd, e, m=m1, tp=tu, mp=mu
|
|
|
|
.ifc \e,e8
|
|
.equ ei, 0
|
|
.else
|
|
.ifc \e,e16
|
|
.equ ei, 8
|
|
.else
|
|
.ifc \e,e32
|
|
.equ ei, 16
|
|
.else
|
|
.ifc \e,e64
|
|
.equ ei, 24
|
|
.else
|
|
.error "Unknown element type"
|
|
.endif
|
|
.endif
|
|
.endif
|
|
.endif
|
|
|
|
.ifc \m,m1
|
|
.equ mi, 0
|
|
.else
|
|
.ifc \m,m2
|
|
.equ mi, 1
|
|
.else
|
|
.ifc \m,m4
|
|
.equ mi, 2
|
|
.else
|
|
.ifc \m,m8
|
|
.equ mi, 3
|
|
.else
|
|
.ifc \m,mf8
|
|
.equ mi, 5
|
|
.else
|
|
.ifc \m,mf4
|
|
.equ mi, 6
|
|
.else
|
|
.ifc \m,mf2
|
|
.equ mi, 7
|
|
.else
|
|
.error "Unknown multiplier"
|
|
.equ mi, 3
|
|
.endif
|
|
.endif
|
|
.endif
|
|
.endif
|
|
.endif
|
|
.endif
|
|
.endif
|
|
|
|
.ifc \tp,tu
|
|
.equ tpi, 0
|
|
.else
|
|
.ifc \tp,ta
|
|
.equ tpi, 64
|
|
.else
|
|
.error "Unknown tail policy"
|
|
.endif
|
|
.endif
|
|
|
|
.ifc \mp,mu
|
|
.equ mpi, 0
|
|
.else
|
|
.ifc \mp,ma
|
|
.equ mpi, 128
|
|
.else
|
|
.error "Unknown mask policy"
|
|
.endif
|
|
.endif
|
|
|
|
li \rd, (ei | mi | tpi | mpi)
|
|
.endm
|