mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
Implement put_pixels_clamped and add_pixels_clamped in Assembler. This
allows better scheduling of the memory accesses, and is portable among all compilers. Originally committed as revision 709 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Falk Hüffner
parent
e09d12f4f6
commit
bb7d4939ba
@ -63,10 +63,11 @@ endif
|
||||
# alpha specific stuff
|
||||
ifeq ($(TARGET_ARCH_ALPHA),yes)
|
||||
OBJS += alpha/dsputil_alpha.o alpha/mpegvideo_alpha.o
|
||||
ASM_OBJS += alpha/dsputil_alpha_asm.o
|
||||
CFLAGS += -Wa,-mpca56
|
||||
endif
|
||||
|
||||
SRCS := $(OBJS:.o=.c) $(ASM_OBJS:.o=.s)
|
||||
SRCS := $(OBJS:.o=.c) $(ASM_OBJS:.o=.S)
|
||||
OBJS := $(OBJS) $(ASM_OBJS)
|
||||
|
||||
LIB= libavcodec.a
|
||||
|
||||
@ -22,64 +22,86 @@
|
||||
|
||||
void simple_idct_axp(DCTELEM *block);
|
||||
|
||||
static void put_pixels_clamped_axp(const DCTELEM *block, UINT8 *pixels,
|
||||
int line_size)
|
||||
void put_pixels_clamped_mvi_asm(const DCTELEM *block, uint8_t *pixels,
|
||||
int line_size);
|
||||
void add_pixels_clamped_mvi_asm(const DCTELEM *block, uint8_t *pixels,
|
||||
int line_size);
|
||||
|
||||
#if 0
|
||||
/* These functions were the base for the optimized assembler routines,
|
||||
and remain here for documentation purposes. */
|
||||
static void put_pixels_clamped_mvi(const DCTELEM *block, uint8_t *pixels,
|
||||
int line_size)
|
||||
{
|
||||
int i = 8;
|
||||
uint64_t clampmask = zap(-1, 0xaa); /* 0x00ff00ff00ff00ff */
|
||||
|
||||
ASM_ACCEPT_MVI;
|
||||
|
||||
do {
|
||||
UINT64 shorts;
|
||||
uint64_t shorts0, shorts1;
|
||||
|
||||
shorts = ldq(block);
|
||||
shorts = maxsw4(shorts, 0);
|
||||
shorts = minsw4(shorts, WORD_VEC(0x00ff));
|
||||
stl(pkwb(shorts), pixels);
|
||||
shorts0 = ldq(block);
|
||||
shorts0 = maxsw4(shorts0, 0);
|
||||
shorts0 = minsw4(shorts0, clampmask);
|
||||
stl(pkwb(shorts0), pixels);
|
||||
|
||||
shorts = ldq(block + 4);
|
||||
shorts = maxsw4(shorts, 0);
|
||||
shorts = minsw4(shorts, WORD_VEC(0x00ff));
|
||||
stl(pkwb(shorts), pixels + 4);
|
||||
shorts1 = ldq(block + 4);
|
||||
shorts1 = maxsw4(shorts1, 0);
|
||||
shorts1 = minsw4(shorts1, clampmask);
|
||||
stl(pkwb(shorts1), pixels + 4);
|
||||
|
||||
pixels += line_size;
|
||||
block += 8;
|
||||
pixels += line_size;
|
||||
block += 8;
|
||||
} while (--i);
|
||||
}
|
||||
|
||||
static void add_pixels_clamped_axp(const DCTELEM *block, UINT8 *pixels,
|
||||
int line_size)
|
||||
void add_pixels_clamped_mvi(const DCTELEM *block, uint8_t *pixels,
|
||||
int line_size)
|
||||
{
|
||||
int i = 8;
|
||||
int h = 8;
|
||||
/* Keep this function a leaf function by generating the constants
|
||||
manually (mainly for the hack value ;-). */
|
||||
uint64_t clampmask = zap(-1, 0xaa); /* 0x00ff00ff00ff00ff */
|
||||
uint64_t signmask = zap(-1, 0x33);
|
||||
signmask ^= signmask >> 1; /* 0x8000800080008000 */
|
||||
|
||||
ASM_ACCEPT_MVI;
|
||||
|
||||
do {
|
||||
UINT64 shorts;
|
||||
uint64_t shorts0, pix0, signs0;
|
||||
uint64_t shorts1, pix1, signs1;
|
||||
|
||||
shorts = ldq(block);
|
||||
shorts &= ~WORD_VEC(0x8000); /* clear highest bit to avoid overflow */
|
||||
shorts += unpkbw(ldl(pixels));
|
||||
shorts &= ~WORD_VEC(0x8000); /* hibit would be set for e. g. -2 + 3 */
|
||||
shorts = minuw4(shorts, WORD_VEC(0x4000)); /* set neg. to 0x4000 */
|
||||
shorts &= ~WORD_VEC(0x4000); /* ...and zap them */
|
||||
shorts = minsw4(shorts, WORD_VEC(0x00ff)); /* clamp to 255 */
|
||||
stl(pkwb(shorts), pixels);
|
||||
shorts0 = ldq(block);
|
||||
shorts1 = ldq(block + 4);
|
||||
|
||||
/* next 4 */
|
||||
shorts = ldq(block + 4);
|
||||
shorts &= ~WORD_VEC(0x8000);
|
||||
shorts += unpkbw(ldl(pixels + 4));
|
||||
shorts &= ~WORD_VEC(0x8000);
|
||||
shorts = minuw4(shorts, WORD_VEC(0x4000));
|
||||
shorts &= ~WORD_VEC(0x4000);
|
||||
shorts = minsw4(shorts, WORD_VEC(0x00ff));
|
||||
stl(pkwb(shorts), pixels + 4);
|
||||
pix0 = unpkbw(ldl(pixels));
|
||||
/* Signed subword add (MMX paddw). */
|
||||
signs0 = shorts0 & signmask;
|
||||
shorts0 &= ~signmask;
|
||||
shorts0 += pix0;
|
||||
shorts0 ^= signs0;
|
||||
/* Clamp. */
|
||||
shorts0 = maxsw4(shorts0, 0);
|
||||
shorts0 = minsw4(shorts0, clampmask);
|
||||
|
||||
pixels += line_size;
|
||||
block += 8;
|
||||
} while (--i);
|
||||
/* Next 4. */
|
||||
pix1 = unpkbw(ldl(pixels + 4));
|
||||
signs1 = shorts1 & signmask;
|
||||
shorts1 &= ~signmask;
|
||||
shorts1 += pix1;
|
||||
shorts1 ^= signs1;
|
||||
shorts1 = maxsw4(shorts1, 0);
|
||||
shorts1 = minsw4(shorts1, clampmask);
|
||||
|
||||
stl(pkwb(shorts0), pixels);
|
||||
stl(pkwb(shorts1), pixels + 4);
|
||||
|
||||
pixels += line_size;
|
||||
block += 8;
|
||||
} while (--h);
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Average 8 unsigned bytes in parallel: (b1 + b2) >> 1
|
||||
Since the immediate result could be greater than 255, we do the
|
||||
@ -222,7 +244,7 @@ void dsputil_init_alpha(void)
|
||||
|
||||
/* amask clears all bits that correspond to present features. */
|
||||
if (amask(AMASK_MVI) == 0) {
|
||||
put_pixels_clamped = put_pixels_clamped_axp;
|
||||
add_pixels_clamped = add_pixels_clamped_axp;
|
||||
put_pixels_clamped = put_pixels_clamped_mvi_asm;
|
||||
add_pixels_clamped = add_pixels_clamped_mvi_asm;
|
||||
}
|
||||
}
|
||||
|
||||
176
libavcodec/alpha/dsputil_alpha_asm.S
Normal file
176
libavcodec/alpha/dsputil_alpha_asm.S
Normal file
@ -0,0 +1,176 @@
|
||||
/*
|
||||
* Alpha optimized DSP utils
|
||||
* Copyright (c) 2002 Falk Hueffner <falk@debian.org>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program 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 General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
/*
|
||||
* These functions are scheduled for pca56. They should work
|
||||
* reasonably on ev6, though.
|
||||
*/
|
||||
|
||||
#include "regdef.h"
|
||||
|
||||
/* Some nicer register names. */
|
||||
#define ta t10
|
||||
#define tb t11
|
||||
#define tc t12
|
||||
#define td AT
|
||||
/* Danger: these overlap with the argument list and the return value */
|
||||
#define te a5
|
||||
#define tf a4
|
||||
#define tg a3
|
||||
#define th v0
|
||||
|
||||
.set noat
|
||||
.set noreorder
|
||||
.arch pca56
|
||||
.text
|
||||
|
||||
/************************************************************************
|
||||
* void put_pixels_clamped_mvi_asm(const DCTELEM *block, uint8_t *pixels,
|
||||
* int line_size)
|
||||
*/
|
||||
.align 6
|
||||
.globl put_pixels_clamped_mvi_asm
|
||||
.ent put_pixels_clamped_mvi_asm
|
||||
put_pixels_clamped_mvi_asm:
|
||||
.frame sp, 0, ra
|
||||
.prologue 0
|
||||
|
||||
lda t8, -1
|
||||
lda t9, 8 # loop counter
|
||||
zap t8, 0xaa, t8 # 00ff00ff00ff00ff
|
||||
|
||||
.align 4
|
||||
1: ldq t0, 0(a0)
|
||||
ldq t1, 8(a0)
|
||||
ldq t2, 16(a0)
|
||||
ldq t3, 24(a0)
|
||||
|
||||
maxsw4 t0, zero, t0
|
||||
subq t9, 2, t9
|
||||
maxsw4 t1, zero, t1
|
||||
lda a0, 32(a0)
|
||||
|
||||
maxsw4 t2, zero, t2
|
||||
addq a1, a2, ta
|
||||
maxsw4 t3, zero, t3
|
||||
minsw4 t0, t8, t0
|
||||
|
||||
minsw4 t1, t8, t1
|
||||
minsw4 t2, t8, t2
|
||||
minsw4 t3, t8, t3
|
||||
pkwb t0, t0
|
||||
|
||||
pkwb t1, t1
|
||||
pkwb t2, t2
|
||||
pkwb t3, t3
|
||||
stl t0, 0(a1)
|
||||
|
||||
stl t1, 4(a1)
|
||||
addq ta, a2, a1
|
||||
stl t2, 0(ta)
|
||||
stl t3, 4(ta)
|
||||
|
||||
bne t9, 1b
|
||||
ret
|
||||
.end put_pixels_clamped_mvi_asm
|
||||
|
||||
/************************************************************************
|
||||
* void add_pixels_clamped_mvi_asm(const DCTELEM *block, uint8_t *pixels,
|
||||
* int line_size)
|
||||
*/
|
||||
.align 6
|
||||
.globl add_pixels_clamped_mvi_asm
|
||||
.ent add_pixels_clamped_mvi_asm
|
||||
add_pixels_clamped_mvi_asm:
|
||||
.frame sp, 0, ra
|
||||
.prologue 0
|
||||
|
||||
lda t1, -1
|
||||
lda th, 8
|
||||
zap t1, 0x33, tg
|
||||
nop
|
||||
|
||||
srl tg, 1, t0
|
||||
xor tg, t0, tg # 0x8000800080008000
|
||||
zap t1, 0xaa, tf # 0x00ff00ff00ff00ff
|
||||
|
||||
.align 4
|
||||
1: ldl t1, 0(a1) # pix0 (try to hit cache line soon)
|
||||
ldl t4, 4(a1) # pix1
|
||||
addq a1, a2, te # pixels += line_size
|
||||
ldq t0, 0(a0) # shorts0
|
||||
|
||||
ldl t7, 0(te) # pix2 (try to hit cache line soon)
|
||||
ldl ta, 4(te) # pix3
|
||||
ldq t3, 8(a0) # shorts1
|
||||
ldq t6, 16(a0) # shorts2
|
||||
|
||||
ldq t9, 24(a0) # shorts3
|
||||
unpkbw t1, t1 # 0 0 (quarter/op no.)
|
||||
and t0, tg, t2 # 0 1
|
||||
unpkbw t4, t4 # 1 0
|
||||
|
||||
bic t0, tg, t0 # 0 2
|
||||
unpkbw t7, t7 # 2 0
|
||||
and t3, tg, t5 # 1 1
|
||||
addq t0, t1, t0 # 0 3
|
||||
|
||||
xor t0, t2, t0 # 0 4
|
||||
unpkbw ta, ta # 3 0
|
||||
and t6, tg, t8 # 2 1
|
||||
maxsw4 t0, zero, t0 # 0 5
|
||||
|
||||
bic t3, tg, t3 # 1 2
|
||||
bic t6, tg, t6 # 2 2
|
||||
minsw4 t0, tf, t0 # 0 6
|
||||
addq t3, t4, t3 # 1 3
|
||||
|
||||
pkwb t0, t0 # 0 7
|
||||
xor t3, t5, t3 # 1 4
|
||||
maxsw4 t3, zero, t3 # 1 5
|
||||
addq t6, t7, t6 # 2 3
|
||||
|
||||
xor t6, t8, t6 # 2 4
|
||||
and t9, tg, tb # 3 1
|
||||
minsw4 t3, tf, t3 # 1 6
|
||||
bic t9, tg, t9 # 3 2
|
||||
|
||||
maxsw4 t6, zero, t6 # 2 5
|
||||
addq t9, ta, t9 # 3 3
|
||||
stl t0, 0(a1) # 0 8
|
||||
minsw4 t6, tf, t6 # 2 6
|
||||
|
||||
xor t9, tb, t9 # 3 4
|
||||
maxsw4 t9, zero, t9 # 3 5
|
||||
lda a0, 32(a0) # block += 16;
|
||||
pkwb t3, t3 # 1 7
|
||||
|
||||
minsw4 t9, tf, t9 # 3 6
|
||||
subq th, 2, th
|
||||
pkwb t6, t6 # 2 7
|
||||
pkwb t9, t9 # 3 7
|
||||
|
||||
stl t3, 4(a1) # 1 8
|
||||
addq te, a2, a1 # pixels += line_size
|
||||
stl t6, 0(te) # 2 8
|
||||
stl t9, 4(te) # 3 8
|
||||
|
||||
bne th, 1b
|
||||
ret
|
||||
.end add_pixels_clamped_mvi_asm
|
||||
45
libavcodec/alpha/regdef.h
Normal file
45
libavcodec/alpha/regdef.h
Normal file
@ -0,0 +1,45 @@
|
||||
/* Some BSDs don't seem to have regdef.h... sigh */
|
||||
#ifndef alpha_regdef_h
|
||||
#define alpha_regdef_h
|
||||
|
||||
#define v0 $0 /* function return value */
|
||||
|
||||
#define t0 $1 /* temporary registers (caller-saved) */
|
||||
#define t1 $2
|
||||
#define t2 $3
|
||||
#define t3 $4
|
||||
#define t4 $5
|
||||
#define t5 $6
|
||||
#define t6 $7
|
||||
#define t7 $8
|
||||
|
||||
#define s0 $9 /* saved-registers (callee-saved registers) */
|
||||
#define s1 $10
|
||||
#define s2 $11
|
||||
#define s3 $12
|
||||
#define s4 $13
|
||||
#define s5 $14
|
||||
#define s6 $15
|
||||
#define fp s6 /* frame-pointer (s6 in frame-less procedures) */
|
||||
|
||||
#define a0 $16 /* argument registers (caller-saved) */
|
||||
#define a1 $17
|
||||
#define a2 $18
|
||||
#define a3 $19
|
||||
#define a4 $20
|
||||
#define a5 $21
|
||||
|
||||
#define t8 $22 /* more temps (caller-saved) */
|
||||
#define t9 $23
|
||||
#define t10 $24
|
||||
#define t11 $25
|
||||
#define ra $26 /* return address register */
|
||||
#define t12 $27
|
||||
|
||||
#define pv t12 /* procedure-variable register */
|
||||
#define AT $at /* assembler temporary */
|
||||
#define gp $29 /* global pointer */
|
||||
#define sp $30 /* stack pointer */
|
||||
#define zero $31 /* reads as zero, writes are noops */
|
||||
|
||||
#endif /* alpha_regdef_h */
|
||||
Loading…
Reference in New Issue
Block a user