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swscale: move yuv2yuvX_sse3 to yasm, unrolls main loop

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And other small optimizations for ~20% speedup.
pull/371/head
Alan Kelly 4 years ago committed by Paul B Mahol
parent 1628409b18
commit 554c2bc708
5 changed files with 294 additions and 158 deletions
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  1. 1
      libswscale/x86/Makefile
  2. 130
      libswscale/x86/swscale.c
  3. 82
      libswscale/x86/swscale_template.c
  4. 136
      libswscale/x86/yuv2yuvX.asm
  5. 103
      tests/checkasm/sw_scale.c

1
libswscale/x86/Makefile
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@ -13,3 +13,4 @@ X86ASM-OBJS += x86/input.o \
x86/scale.o \
x86/rgb_2_rgb.o \
x86/yuv_2_rgb.o \
x86/yuv2yuvX.o \

130
libswscale/x86/swscale.c
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@ -63,6 +63,16 @@ DECLARE_ASM_ALIGNED(8, const uint64_t, ff_bgr2UVOffset) = 0x8080808080808080ULL;
DECLARE_ASM_ALIGNED(8, const uint64_t, ff_w1111) = 0x0001000100010001ULL;
#define YUV2YUVX_FUNC_DECL(opt) \
static void yuv2yuvX_ ##opt(const int16_t *filter, int filterSize, const int16_t **src, \
uint8_t *dest, int dstW, \
const uint8_t *dither, int offset); \
YUV2YUVX_FUNC_DECL(mmx)
YUV2YUVX_FUNC_DECL(mmxext)
YUV2YUVX_FUNC_DECL(sse3)
YUV2YUVX_FUNC_DECL(avx2)
//MMX versions
#if HAVE_MMX_INLINE
#undef RENAME
@ -198,81 +208,44 @@ void ff_updateMMXDitherTables(SwsContext *c, int dstY)
}
#if HAVE_MMXEXT
static void yuv2yuvX_sse3(const int16_t *filter, int filterSize,
const int16_t **src, uint8_t *dest, int dstW,
const uint8_t *dither, int offset)
{
if(((uintptr_t)dest) & 15){
yuv2yuvX_mmxext(filter, filterSize, src, dest, dstW, dither, offset);
return;
}
filterSize--;
#define MAIN_FUNCTION \
"pxor %%xmm0, %%xmm0 \n\t" \
"punpcklbw %%xmm0, %%xmm3 \n\t" \
"movd %4, %%xmm1 \n\t" \
"punpcklwd %%xmm1, %%xmm1 \n\t" \
"punpckldq %%xmm1, %%xmm1 \n\t" \
"punpcklqdq %%xmm1, %%xmm1 \n\t" \
"psllw $3, %%xmm1 \n\t" \
"paddw %%xmm1, %%xmm3 \n\t" \
"psraw $4, %%xmm3 \n\t" \
"movdqa %%xmm3, %%xmm4 \n\t" \
"movdqa %%xmm3, %%xmm7 \n\t" \
"movl %3, %%ecx \n\t" \
"mov %0, %%"FF_REG_d" \n\t"\
"mov (%%"FF_REG_d"), %%"FF_REG_S" \n\t"\
".p2align 4 \n\t" /* FIXME Unroll? */\
"1: \n\t"\
"movddup 8(%%"FF_REG_d"), %%xmm0 \n\t" /* filterCoeff */\
"movdqa (%%"FF_REG_S", %%"FF_REG_c", 2), %%xmm2 \n\t" /* srcData */\
"movdqa 16(%%"FF_REG_S", %%"FF_REG_c", 2), %%xmm5 \n\t" /* srcData */\
"add $16, %%"FF_REG_d" \n\t"\
"mov (%%"FF_REG_d"), %%"FF_REG_S" \n\t"\
"test %%"FF_REG_S", %%"FF_REG_S" \n\t"\
"pmulhw %%xmm0, %%xmm2 \n\t"\
"pmulhw %%xmm0, %%xmm5 \n\t"\
"paddw %%xmm2, %%xmm3 \n\t"\
"paddw %%xmm5, %%xmm4 \n\t"\
" jnz 1b \n\t"\
"psraw $3, %%xmm3 \n\t"\
"psraw $3, %%xmm4 \n\t"\
"packuswb %%xmm4, %%xmm3 \n\t"\
"movntdq %%xmm3, (%1, %%"FF_REG_c") \n\t"\
"add $16, %%"FF_REG_c" \n\t"\
"cmp %2, %%"FF_REG_c" \n\t"\
"movdqa %%xmm7, %%xmm3 \n\t" \
"movdqa %%xmm7, %%xmm4 \n\t" \
"mov %0, %%"FF_REG_d" \n\t"\
"mov (%%"FF_REG_d"), %%"FF_REG_S" \n\t"\
"jb 1b \n\t"
if (offset) {
__asm__ volatile(
"movq %5, %%xmm3 \n\t"
"movdqa %%xmm3, %%xmm4 \n\t"
"psrlq $24, %%xmm3 \n\t"
"psllq $40, %%xmm4 \n\t"
"por %%xmm4, %%xmm3 \n\t"
MAIN_FUNCTION
:: "g" (filter),
"r" (dest-offset), "g" ((x86_reg)(dstW+offset)), "m" (offset),
"m"(filterSize), "m"(((uint64_t *) dither)[0])
: XMM_CLOBBERS("%xmm0" , "%xmm1" , "%xmm2" , "%xmm3" , "%xmm4" , "%xmm5" , "%xmm7" ,)
"%"FF_REG_d, "%"FF_REG_S, "%"FF_REG_c
);
} else {
__asm__ volatile(
"movq %5, %%xmm3 \n\t"
MAIN_FUNCTION
:: "g" (filter),
"r" (dest-offset), "g" ((x86_reg)(dstW+offset)), "m" (offset),
"m"(filterSize), "m"(((uint64_t *) dither)[0])
: XMM_CLOBBERS("%xmm0" , "%xmm1" , "%xmm2" , "%xmm3" , "%xmm4" , "%xmm5" , "%xmm7" ,)
"%"FF_REG_d, "%"FF_REG_S, "%"FF_REG_c
);
}
#define YUV2YUVX_FUNC_MMX(opt, step) \
void ff_yuv2yuvX_ ##opt(const int16_t *filter, int filterSize, int srcOffset, \
uint8_t *dest, int dstW, \
const uint8_t *dither, int offset); \
static void yuv2yuvX_ ##opt(const int16_t *filter, int filterSize, \
const int16_t **src, uint8_t *dest, int dstW, \
const uint8_t *dither, int offset) \
{ \
ff_yuv2yuvX_ ##opt(filter, filterSize - 1, 0, dest - offset, dstW + offset, dither, offset); \
return; \
}
#define YUV2YUVX_FUNC(opt, step) \
void ff_yuv2yuvX_ ##opt(const int16_t *filter, int filterSize, int srcOffset, \
uint8_t *dest, int dstW, \
const uint8_t *dither, int offset); \
static void yuv2yuvX_ ##opt(const int16_t *filter, int filterSize, \
const int16_t **src, uint8_t *dest, int dstW, \
const uint8_t *dither, int offset) \
{ \
int remainder = (dstW % step); \
int pixelsProcessed = dstW - remainder; \
if(((uintptr_t)dest) & 15){ \
yuv2yuvX_mmx(filter, filterSize, src, dest, dstW, dither, offset); \
return; \
} \
ff_yuv2yuvX_ ##opt(filter, filterSize - 1, 0, dest - offset, pixelsProcessed + offset, dither, offset); \
if(remainder > 0){ \
ff_yuv2yuvX_mmx(filter, filterSize - 1, pixelsProcessed, dest - offset, pixelsProcessed + remainder + offset, dither, offset); \
} \
return; \
}
YUV2YUVX_FUNC_MMX(mmx, 16)
YUV2YUVX_FUNC_MMX(mmxext, 16)
YUV2YUVX_FUNC(sse3, 32)
YUV2YUVX_FUNC(avx2, 64)
#endif
#endif /* HAVE_INLINE_ASM */
@ -403,9 +376,14 @@ av_cold void ff_sws_init_swscale_x86(SwsContext *c)
#if HAVE_MMXEXT_INLINE
if (INLINE_MMXEXT(cpu_flags))
sws_init_swscale_mmxext(c);
if (cpu_flags & AV_CPU_FLAG_SSE3){
if(c->use_mmx_vfilter && !(c->flags & SWS_ACCURATE_RND))
if (cpu_flags & AV_CPU_FLAG_AVX2){
if(c->use_mmx_vfilter && !(c->flags & SWS_ACCURATE_RND)){
c->yuv2planeX = yuv2yuvX_avx2;
}
} else if (cpu_flags & AV_CPU_FLAG_SSE3){
if(c->use_mmx_vfilter && !(c->flags & SWS_ACCURATE_RND)){
c->yuv2planeX = yuv2yuvX_sse3;
}
}
#endif

82
libswscale/x86/swscale_template.c
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@ -38,88 +38,6 @@
#endif
#define MOVNTQ(a,b) REAL_MOVNTQ(a,b)
#if !COMPILE_TEMPLATE_MMXEXT
static av_always_inline void
dither_8to16(const uint8_t *srcDither, int rot)
{
if (rot) {
__asm__ volatile("pxor %%mm0, %%mm0\n\t"
"movq (%0), %%mm3\n\t"
"movq %%mm3, %%mm4\n\t"
"psrlq $24, %%mm3\n\t"
"psllq $40, %%mm4\n\t"
"por %%mm4, %%mm3\n\t"
"movq %%mm3, %%mm4\n\t"
"punpcklbw %%mm0, %%mm3\n\t"
"punpckhbw %%mm0, %%mm4\n\t"
:: "r"(srcDither)
);
} else {
__asm__ volatile("pxor %%mm0, %%mm0\n\t"
"movq (%0), %%mm3\n\t"
"movq %%mm3, %%mm4\n\t"
"punpcklbw %%mm0, %%mm3\n\t"
"punpckhbw %%mm0, %%mm4\n\t"
:: "r"(srcDither)
);
}
}
#endif
static void RENAME(yuv2yuvX)(const int16_t *filter, int filterSize,
const int16_t **src, uint8_t *dest, int dstW,
const uint8_t *dither, int offset)
{
dither_8to16(dither, offset);
filterSize--;
__asm__ volatile(
"movd %0, %%mm1\n\t"
"punpcklwd %%mm1, %%mm1\n\t"
"punpckldq %%mm1, %%mm1\n\t"
"psllw $3, %%mm1\n\t"
"paddw %%mm1, %%mm3\n\t"
"paddw %%mm1, %%mm4\n\t"
"psraw $4, %%mm3\n\t"
"psraw $4, %%mm4\n\t"
::"m"(filterSize)
);
__asm__ volatile(\
"movq %%mm3, %%mm6\n\t"
"movq %%mm4, %%mm7\n\t"
"movl %3, %%ecx\n\t"
"mov %0, %%"FF_REG_d" \n\t"\
"mov (%%"FF_REG_d"), %%"FF_REG_S" \n\t"\
".p2align 4 \n\t" /* FIXME Unroll? */\
"1: \n\t"\
"movq 8(%%"FF_REG_d"), %%mm0 \n\t" /* filterCoeff */\
"movq (%%"FF_REG_S", %%"FF_REG_c", 2), %%mm2 \n\t" /* srcData */\
"movq 8(%%"FF_REG_S", %%"FF_REG_c", 2), %%mm5 \n\t" /* srcData */\
"add $16, %%"FF_REG_d" \n\t"\
"mov (%%"FF_REG_d"), %%"FF_REG_S" \n\t"\
"test %%"FF_REG_S", %%"FF_REG_S" \n\t"\
"pmulhw %%mm0, %%mm2 \n\t"\
"pmulhw %%mm0, %%mm5 \n\t"\
"paddw %%mm2, %%mm3 \n\t"\
"paddw %%mm5, %%mm4 \n\t"\
" jnz 1b \n\t"\
"psraw $3, %%mm3 \n\t"\
"psraw $3, %%mm4 \n\t"\
"packuswb %%mm4, %%mm3 \n\t"
MOVNTQ2 " %%mm3, (%1, %%"FF_REG_c")\n\t"
"add $8, %%"FF_REG_c" \n\t"\
"cmp %2, %%"FF_REG_c" \n\t"\
"movq %%mm6, %%mm3\n\t"
"movq %%mm7, %%mm4\n\t"
"mov %0, %%"FF_REG_d" \n\t"\
"mov (%%"FF_REG_d"), %%"FF_REG_S" \n\t"\
"jb 1b \n\t"\
:: "g" (filter),
"r" (dest-offset), "g" ((x86_reg)(dstW+offset)), "m" (offset)
: "%"FF_REG_d, "%"FF_REG_S, "%"FF_REG_c
);
}
#define YSCALEYUV2PACKEDX_UV \
__asm__ volatile(\
"xor %%"FF_REG_a", %%"FF_REG_a" \n\t"\

136
libswscale/x86/yuv2yuvX.asm
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@ -0,0 +1,136 @@
;******************************************************************************
;* x86-optimized yuv2yuvX
;* Copyright 2020 Google LLC
;* Copyright (C) 2001-2011 Michael Niedermayer <michaelni@gmx.at>
;*
;* 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
;******************************************************************************
%include "libavutil/x86/x86util.asm"
SECTION .text
;-----------------------------------------------------------------------------
; yuv2yuvX
;
; void ff_yuv2yuvX_<opt>(const int16_t *filter, int filterSize,
; int srcOffset, uint8_t *dest, int dstW,
; const uint8_t *dither, int offset);
;
;-----------------------------------------------------------------------------
%macro YUV2YUVX_FUNC 0
cglobal yuv2yuvX, 7, 7, 8, filter, filterSize, src, dest, dstW, dither, offset
%if notcpuflag(sse3)
%define movr mova
%else
%define movr movdqu
%endif
%if ARCH_X86_64
movsxd dstWq, dstWd
movsxd offsetq, offsetd
movsxd srcq, srcd
%endif ; x86-64
%if cpuflag(avx2)
vpbroadcastq m3, [ditherq]
%elif cpuflag(sse3)
movq xmm3, [ditherq]
%else
mova m3, [ditherq]
%endif ; avx2
cmp offsetd, 0
jz .offset
; offset != 0 path.
psrlq m5, m3, $18
psllq m3, m3, $28
por m3, m3, m5
.offset:
add offsetq, srcq
%if cpuflag(avx2)
movd xmm1, filterSized
vpbroadcastw m1, xmm1
%elif cpuflag(sse3)
movd xmm1, filterSized
pshuflw m1, m1, q0000
punpcklqdq m1, m1
%else
movd m1, filterSized
punpcklwd m1, m1
punpckldq m1, m1
%endif ; avx2
pxor m0, m0, m0
mov filterSizeq, filterq
mov srcq, [filterSizeq]
punpcklbw m3, m0
psllw m1, m1, 3
paddw m3, m3, m1
psraw m7, m3, 4
.outerloop:
mova m4, m7
mova m3, m7
mova m6, m7
mova m1, m7
.loop:
%if cpuflag(avx2)
vpbroadcastq m0, [filterSizeq + 8]
%elif cpuflag(sse3)
movddup m0, [filterSizeq + 8]
%else
mova m0, [filterSizeq + 8]
%endif
pmulhw m2, m0, [srcq + offsetq * 2]
pmulhw m5, m0, [srcq + offsetq * 2 + mmsize]
paddw m3, m3, m2
paddw m4, m4, m5
pmulhw m2, m0, [srcq + offsetq * 2 + 2 * mmsize]
pmulhw m5, m0, [srcq + offsetq * 2 + 3 * mmsize]
paddw m6, m6, m2
paddw m1, m1, m5
add filterSizeq, $10
mov srcq, [filterSizeq]
test srcq, srcq
jnz .loop
psraw m3, m3, 3
psraw m4, m4, 3
psraw m6, m6, 3
psraw m1, m1, 3
packuswb m3, m3, m4
packuswb m6, m6, m1
mov srcq, [filterq]
%if cpuflag(avx2)
vpermq m3, m3, 216
vpermq m6, m6, 216
%endif
movr [destq + offsetq], m3
movr [destq + offsetq + mmsize], m6
add offsetq, mmsize * 2
mov filterSizeq, filterq
cmp offsetq, dstWq
jb .outerloop
REP_RET
%endmacro
INIT_MMX mmx
YUV2YUVX_FUNC
INIT_MMX mmxext
YUV2YUVX_FUNC
INIT_XMM sse3
YUV2YUVX_FUNC
INIT_YMM avx2
YUV2YUVX_FUNC

103
tests/checkasm/sw_scale.c
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@ -36,6 +36,107 @@
AV_WN32(buf + j, rnd()); \
} while (0)
// This reference function is the same approximate algorithm employed by the
// SIMD functions
static void ref_function(const int16_t *filter, int filterSize,
const int16_t **src, uint8_t *dest, int dstW,
const uint8_t *dither, int offset)
{
int i, d;
d = ((filterSize - 1) * 8 + dither[0]) >> 4;
for ( i = 0; i < dstW; i++) {
int16_t val = d;
int j;
union {
int val;
int16_t v[2];
} t;
for (j = 0; j < filterSize; j++){
t.val = (int)src[j][i + offset] * (int)filter[j];
val += t.v[1];
}
dest[i]= av_clip_uint8(val>>3);
}
}
static void check_yuv2yuvX(void)
{
struct SwsContext *ctx;
int fsi, osi, isi, i, j;
int dstW;
#define LARGEST_FILTER 16
#define FILTER_SIZES 4
static const int filter_sizes[FILTER_SIZES] = {1, 4, 8, 16};
#define LARGEST_INPUT_SIZE 512
#define INPUT_SIZES 4
static const int input_sizes[INPUT_SIZES] = {128, 144, 256, 512};
declare_func_emms(AV_CPU_FLAG_MMX, void, const int16_t *filter,
int filterSize, const int16_t **src, uint8_t *dest,
int dstW, const uint8_t *dither, int offset);
const int16_t **src;
LOCAL_ALIGNED_8(int16_t, src_pixels, [LARGEST_FILTER * LARGEST_INPUT_SIZE]);
LOCAL_ALIGNED_8(int16_t, filter_coeff, [LARGEST_FILTER]);
LOCAL_ALIGNED_8(uint8_t, dst0, [LARGEST_INPUT_SIZE]);
LOCAL_ALIGNED_8(uint8_t, dst1, [LARGEST_INPUT_SIZE]);
LOCAL_ALIGNED_8(uint8_t, dither, [LARGEST_INPUT_SIZE]);
union VFilterData{
const int16_t *src;
uint16_t coeff[8];
} *vFilterData;
uint8_t d_val = rnd();
randomize_buffers(filter_coeff, LARGEST_FILTER);
randomize_buffers(src_pixels, LARGEST_FILTER * LARGEST_INPUT_SIZE);
ctx = sws_alloc_context();
if (sws_init_context(ctx, NULL, NULL) < 0)
fail();
ff_getSwsFunc(ctx);
for(i = 0; i < LARGEST_INPUT_SIZE; ++i){
dither[i] = d_val;
}
for(isi = 0; isi < INPUT_SIZES; ++isi){
dstW = input_sizes[isi];
for(osi = 0; osi < 64; osi += 16){
for(fsi = 0; fsi < FILTER_SIZES; ++fsi){
src = av_malloc(sizeof(int16_t*) * filter_sizes[fsi]);
vFilterData = av_malloc((filter_sizes[fsi] + 2) * sizeof(union VFilterData));
memset(vFilterData, 0, (filter_sizes[fsi] + 2) * sizeof(union VFilterData));
for(i = 0; i < filter_sizes[fsi]; ++i){
src[i] = &src_pixels[i * LARGEST_INPUT_SIZE];
vFilterData[i].src = src[i];
for(j = 0; j < 4; ++j)
vFilterData[i].coeff[j + 4] = filter_coeff[i];
}
if (check_func(ctx->yuv2planeX, "yuv2yuvX_%d_%d", filter_sizes[fsi], osi)){
memset(dst0, 0, LARGEST_INPUT_SIZE * sizeof(dst0[0]));
memset(dst1, 0, LARGEST_INPUT_SIZE * sizeof(dst1[0]));
// The reference function is not the scalar function selected when mmx
// is deactivated as the SIMD functions do not give the same result as
// the scalar ones due to rounding. The SIMD functions are activated by
// the flag SWS_ACCURATE_RND
ref_function(&filter_coeff[0], filter_sizes[fsi], src, dst0, dstW - osi, dither, osi);
// There's no point in calling new for the reference function
if(ctx->use_mmx_vfilter){
call_new((const int16_t*)vFilterData, filter_sizes[fsi], src, dst1, dstW - osi, dither, osi);
if (memcmp(dst0, dst1, LARGEST_INPUT_SIZE * sizeof(dst0[0])))
fail();
if(dstW == LARGEST_INPUT_SIZE)
bench_new((const int16_t*)vFilterData, filter_sizes[fsi], src, dst1, dstW - osi, dither, osi);
}
}
free(src);
free(vFilterData);
}
}
}
sws_freeContext(ctx);
#undef FILTER_SIZES
}
#undef SRC_PIXELS
#define SRC_PIXELS 128
static void check_hscale(void)
@ -132,4 +233,6 @@ void checkasm_check_sw_scale(void)
{
check_hscale();
report("hscale");
check_yuv2yuvX();
report("yuv2yuvX");
}

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