[FFmpeg-cvslog] png: move DSP functions to their own DSP context.
Ronald S. Bultje
git at videolan.org
Mon Jan 30 05:29:43 CET 2012
ffmpeg | branch: master | Ronald S. Bultje <rsbultje at gmail.com> | Fri Jan 27 23:00:36 2012 +0800| [e92003514d7aab25d56e2d827820f47755d397ec] | committer: Ronald S. Bultje
png: move DSP functions to their own DSP context.
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e92003514d7aab25d56e2d827820f47755d397ec
---
libavcodec/Makefile | 2 +-
libavcodec/dsputil.c | 16 -----
libavcodec/dsputil.h | 3 -
libavcodec/pngdec.c | 10 ++--
libavcodec/pngdsp.c | 48 +++++++++++++++
libavcodec/pngdsp.h | 40 ++++++++++++
libavcodec/x86/Makefile | 1 +
libavcodec/x86/dsputil_mmx.c | 102 -------------------------------
libavcodec/x86/pngdsp-init.c | 135 ++++++++++++++++++++++++++++++++++++++++++
9 files changed, 230 insertions(+), 127 deletions(-)
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 27f8546..daf2ce3 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -296,7 +296,7 @@ OBJS-$(CONFIG_PGMYUV_DECODER) += pnmdec.o pnm.o
OBJS-$(CONFIG_PGMYUV_ENCODER) += pnmenc.o pnm.o
OBJS-$(CONFIG_PGSSUB_DECODER) += pgssubdec.o
OBJS-$(CONFIG_PICTOR_DECODER) += pictordec.o cga_data.o
-OBJS-$(CONFIG_PNG_DECODER) += png.o pngdec.o
+OBJS-$(CONFIG_PNG_DECODER) += png.o pngdec.o pngdsp.o
OBJS-$(CONFIG_PNG_ENCODER) += png.o pngenc.o
OBJS-$(CONFIG_PPM_DECODER) += pnmdec.o pnm.o
OBJS-$(CONFIG_PPM_ENCODER) += pnmenc.o pnm.o
diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 5c1039b..a7c69c0 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -38,7 +38,6 @@
#include "config.h"
#include "ac3dec.h"
#include "vorbis.h"
-#include "png.h"
uint8_t ff_cropTbl[256 + 2 * MAX_NEG_CROP] = {0, };
uint32_t ff_squareTbl[512] = {0, };
@@ -1882,17 +1881,6 @@ static void add_bytes_c(uint8_t *dst, uint8_t *src, int w){
dst[i+0] += src[i+0];
}
-static void add_bytes_l2_c(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w){
- long i;
- for(i=0; i<=w-sizeof(long); i+=sizeof(long)){
- long a = *(long*)(src1+i);
- long b = *(long*)(src2+i);
- *(long*)(dst+i) = ((a&pb_7f) + (b&pb_7f)) ^ ((a^b)&pb_80);
- }
- for(; i<w; i++)
- dst[i] = src1[i]+src2[i];
-}
-
static void diff_bytes_c(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w){
long i;
#if !HAVE_FAST_UNALIGNED
@@ -3003,7 +2991,6 @@ av_cold void dsputil_init(DSPContext* c, AVCodecContext *avctx)
c->ssd_int8_vs_int16 = ssd_int8_vs_int16_c;
c->add_bytes= add_bytes_c;
- c->add_bytes_l2= add_bytes_l2_c;
c->diff_bytes= diff_bytes_c;
c->add_hfyu_median_prediction= add_hfyu_median_prediction_c;
c->sub_hfyu_median_prediction= sub_hfyu_median_prediction_c;
@@ -3011,9 +2998,6 @@ av_cold void dsputil_init(DSPContext* c, AVCodecContext *avctx)
c->add_hfyu_left_prediction_bgr32 = add_hfyu_left_prediction_bgr32_c;
c->bswap_buf= bswap_buf;
c->bswap16_buf = bswap16_buf;
-#if CONFIG_PNG_DECODER
- c->add_png_paeth_prediction= ff_add_png_paeth_prediction;
-#endif
if (CONFIG_H263_DECODER || CONFIG_H263_ENCODER) {
c->h263_h_loop_filter= h263_h_loop_filter_c;
diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h
index 3001609..579b54b 100644
--- a/libavcodec/dsputil.h
+++ b/libavcodec/dsputil.h
@@ -378,7 +378,6 @@ typedef struct DSPContext {
/* huffyuv specific */
void (*add_bytes)(uint8_t *dst/*align 16*/, uint8_t *src/*align 16*/, int w);
- void (*add_bytes_l2)(uint8_t *dst/*align 16*/, uint8_t *src1/*align 16*/, uint8_t *src2/*align 16*/, int w);
void (*diff_bytes)(uint8_t *dst/*align 16*/, uint8_t *src1/*align 16*/, uint8_t *src2/*align 1*/,int w);
/**
* subtract huffyuv's variant of median prediction
@@ -388,8 +387,6 @@ typedef struct DSPContext {
void (*add_hfyu_median_prediction)(uint8_t *dst, const uint8_t *top, const uint8_t *diff, int w, int *left, int *left_top);
int (*add_hfyu_left_prediction)(uint8_t *dst, const uint8_t *src, int w, int left);
void (*add_hfyu_left_prediction_bgr32)(uint8_t *dst, const uint8_t *src, int w, int *red, int *green, int *blue, int *alpha);
- /* this might write to dst[w] */
- void (*add_png_paeth_prediction)(uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp);
void (*bswap_buf)(uint32_t *dst, const uint32_t *src, int w);
void (*bswap16_buf)(uint16_t *dst, const uint16_t *src, int len);
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index a40cebb..801085b 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -22,7 +22,7 @@
#include "avcodec.h"
#include "bytestream.h"
#include "png.h"
-#include "dsputil.h"
+#include "pngdsp.h"
/* TODO:
* - add 2, 4 and 16 bit depth support
@@ -33,7 +33,7 @@
//#define DEBUG
typedef struct PNGDecContext {
- DSPContext dsp;
+ PNGDSPContext dsp;
const uint8_t *bytestream;
const uint8_t *bytestream_start;
@@ -191,7 +191,7 @@ void ff_add_png_paeth_prediction(uint8_t *dst, uint8_t *src, uint8_t *top, int w
}
/* NOTE: 'dst' can be equal to 'last' */
-static void png_filter_row(DSPContext *dsp, uint8_t *dst, int filter_type,
+static void png_filter_row(PNGDSPContext *dsp, uint8_t *dst, int filter_type,
uint8_t *src, uint8_t *last, int size, int bpp)
{
int i, p, r, g, b, a;
@@ -235,7 +235,7 @@ static void png_filter_row(DSPContext *dsp, uint8_t *dst, int filter_type,
if(bpp > 1 && size > 4) {
// would write off the end of the array if we let it process the last pixel with bpp=3
int w = bpp==4 ? size : size-3;
- dsp->add_png_paeth_prediction(dst+i, src+i, last+i, w-i, bpp);
+ dsp->add_paeth_prediction(dst+i, src+i, last+i, w-i, bpp);
i = w;
}
ff_add_png_paeth_prediction(dst+i, src+i, last+i, size-i, bpp);
@@ -639,7 +639,7 @@ static av_cold int png_dec_init(AVCodecContext *avctx){
s->last_picture = &s->picture2;
avcodec_get_frame_defaults(&s->picture1);
avcodec_get_frame_defaults(&s->picture2);
- dsputil_init(&s->dsp, avctx);
+ ff_pngdsp_init(&s->dsp);
return 0;
}
diff --git a/libavcodec/pngdsp.c b/libavcodec/pngdsp.c
new file mode 100644
index 0000000..d40bf9c
--- /dev/null
+++ b/libavcodec/pngdsp.c
@@ -0,0 +1,48 @@
+/*
+ * PNG image format
+ * Copyright (c) 2008 Loren Merrit <lorenm at u.washington.edu>
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/common.h"
+#include "png.h"
+#include "pngdsp.h"
+
+// 0x7f7f7f7f or 0x7f7f7f7f7f7f7f7f or whatever, depending on the cpu's native arithmetic size
+#define pb_7f (~0UL/255 * 0x7f)
+#define pb_80 (~0UL/255 * 0x80)
+
+static void add_bytes_l2_c(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w)
+{
+ long i;
+ for (i = 0; i <= w - sizeof(long); i += sizeof(long)) {
+ long a = *(long *)(src1 + i);
+ long b = *(long *)(src2 + i);
+ *(long *)(dst + i) = ((a & pb_7f) + (b & pb_7f)) ^ ((a ^ b) & pb_80);
+ }
+ for (; i < w; i++)
+ dst[i] = src1[i] + src2[i];
+}
+
+void ff_pngdsp_init(PNGDSPContext *dsp)
+{
+ dsp->add_bytes_l2 = add_bytes_l2_c;
+ dsp->add_paeth_prediction = ff_add_png_paeth_prediction;
+
+ if (HAVE_MMX) ff_pngdsp_init_x86(dsp);
+}
diff --git a/libavcodec/pngdsp.h b/libavcodec/pngdsp.h
new file mode 100644
index 0000000..98d29a8
--- /dev/null
+++ b/libavcodec/pngdsp.h
@@ -0,0 +1,40 @@
+/*
+ * PNG image format
+ * Copyright (c) 2008 Loren Merrit <lorenm at u.washington.edu>
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_PNGDSP_H
+#define AVCODEC_PNGDSP_H
+
+#include <stdint.h>
+
+typedef struct PNGDSPContext {
+ void (*add_bytes_l2)(uint8_t *dst /* align 16 */,
+ uint8_t *src1 /* align 16 */,
+ uint8_t *src2 /* align 16 */, int w);
+
+ /* this might write to dst[w] */
+ void (*add_paeth_prediction)(uint8_t *dst, uint8_t *src,
+ uint8_t *top, int w, int bpp);
+} PNGDSPContext;
+
+void ff_pngdsp_init(PNGDSPContext *dsp);
+void ff_pngdsp_init_x86(PNGDSPContext *dsp);
+
+#endif /* AVCDODEC_PNGDSP_H */
diff --git a/libavcodec/x86/Makefile b/libavcodec/x86/Makefile
index 1e88e4a..7b76aab 100644
--- a/libavcodec/x86/Makefile
+++ b/libavcodec/x86/Makefile
@@ -42,6 +42,7 @@ MMX-OBJS-$(CONFIG_ENCODERS) += x86/dsputilenc_mmx.o
YASM-OBJS-$(CONFIG_ENCODERS) += x86/dsputilenc_yasm.o
MMX-OBJS-$(CONFIG_GPL) += x86/idct_mmx.o
MMX-OBJS-$(CONFIG_LPC) += x86/lpc_mmx.o
+MMX-OBJS-$(CONFIG_PNG_DECODER) += x86/pngdsp-init.o
YASM-OBJS-$(CONFIG_PRORES_DECODER) += x86/proresdsp.o
MMX-OBJS-$(CONFIG_PRORES_DECODER) += x86/proresdsp-init.o
MMX-OBJS-$(CONFIG_DWT) += x86/snowdsp_mmx.o
diff --git a/libavcodec/x86/dsputil_mmx.c b/libavcodec/x86/dsputil_mmx.c
index 7964014..7cc16c0 100644
--- a/libavcodec/x86/dsputil_mmx.c
+++ b/libavcodec/x86/dsputil_mmx.c
@@ -582,28 +582,6 @@ static void add_bytes_mmx(uint8_t *dst, uint8_t *src, int w){
dst[i+0] += src[i+0];
}
-static void add_bytes_l2_mmx(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w){
- x86_reg i=0;
- __asm__ volatile(
- "jmp 2f \n\t"
- "1: \n\t"
- "movq (%2, %0), %%mm0 \n\t"
- "movq 8(%2, %0), %%mm1 \n\t"
- "paddb (%3, %0), %%mm0 \n\t"
- "paddb 8(%3, %0), %%mm1 \n\t"
- "movq %%mm0, (%1, %0) \n\t"
- "movq %%mm1, 8(%1, %0) \n\t"
- "add $16, %0 \n\t"
- "2: \n\t"
- "cmp %4, %0 \n\t"
- " js 1b \n\t"
- : "+r" (i)
- : "r"(dst), "r"(src1), "r"(src2), "r"((x86_reg)w-15)
- );
- for(; i<w; i++)
- dst[i] = src1[i] + src2[i];
-}
-
#if HAVE_7REGS
static void add_hfyu_median_prediction_cmov(uint8_t *dst, const uint8_t *top, const uint8_t *diff, int w, int *left, int *left_top) {
x86_reg w2 = -w;
@@ -879,80 +857,6 @@ static void draw_edges_mmx(uint8_t *buf, int wrap, int width, int height, int w,
}
}
-#define PAETH(cpu, abs3)\
-static void add_png_paeth_prediction_##cpu(uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp)\
-{\
- x86_reg i = -bpp;\
- x86_reg end = w-3;\
- __asm__ volatile(\
- "pxor %%mm7, %%mm7 \n"\
- "movd (%1,%0), %%mm0 \n"\
- "movd (%2,%0), %%mm1 \n"\
- "punpcklbw %%mm7, %%mm0 \n"\
- "punpcklbw %%mm7, %%mm1 \n"\
- "add %4, %0 \n"\
- "1: \n"\
- "movq %%mm1, %%mm2 \n"\
- "movd (%2,%0), %%mm1 \n"\
- "movq %%mm2, %%mm3 \n"\
- "punpcklbw %%mm7, %%mm1 \n"\
- "movq %%mm2, %%mm4 \n"\
- "psubw %%mm1, %%mm3 \n"\
- "psubw %%mm0, %%mm4 \n"\
- "movq %%mm3, %%mm5 \n"\
- "paddw %%mm4, %%mm5 \n"\
- abs3\
- "movq %%mm4, %%mm6 \n"\
- "pminsw %%mm5, %%mm6 \n"\
- "pcmpgtw %%mm6, %%mm3 \n"\
- "pcmpgtw %%mm5, %%mm4 \n"\
- "movq %%mm4, %%mm6 \n"\
- "pand %%mm3, %%mm4 \n"\
- "pandn %%mm3, %%mm6 \n"\
- "pandn %%mm0, %%mm3 \n"\
- "movd (%3,%0), %%mm0 \n"\
- "pand %%mm1, %%mm6 \n"\
- "pand %%mm4, %%mm2 \n"\
- "punpcklbw %%mm7, %%mm0 \n"\
- "movq %6, %%mm5 \n"\
- "paddw %%mm6, %%mm0 \n"\
- "paddw %%mm2, %%mm3 \n"\
- "paddw %%mm3, %%mm0 \n"\
- "pand %%mm5, %%mm0 \n"\
- "movq %%mm0, %%mm3 \n"\
- "packuswb %%mm3, %%mm3 \n"\
- "movd %%mm3, (%1,%0) \n"\
- "add %4, %0 \n"\
- "cmp %5, %0 \n"\
- "jle 1b \n"\
- :"+r"(i)\
- :"r"(dst), "r"(top), "r"(src), "r"((x86_reg)bpp), "g"(end),\
- "m"(ff_pw_255)\
- :"memory"\
- );\
-}
-
-#define ABS3_MMX2\
- "psubw %%mm5, %%mm7 \n"\
- "pmaxsw %%mm7, %%mm5 \n"\
- "pxor %%mm6, %%mm6 \n"\
- "pxor %%mm7, %%mm7 \n"\
- "psubw %%mm3, %%mm6 \n"\
- "psubw %%mm4, %%mm7 \n"\
- "pmaxsw %%mm6, %%mm3 \n"\
- "pmaxsw %%mm7, %%mm4 \n"\
- "pxor %%mm7, %%mm7 \n"
-
-#define ABS3_SSSE3\
- "pabsw %%mm3, %%mm3 \n"\
- "pabsw %%mm4, %%mm4 \n"\
- "pabsw %%mm5, %%mm5 \n"
-
-PAETH(mmx2, ABS3_MMX2)
-#if HAVE_SSSE3
-PAETH(ssse3, ABS3_SSSE3)
-#endif
-
#define QPEL_V_LOW(m3,m4,m5,m6, pw_20, pw_3, rnd, in0, in1, in2, in7, out, OP)\
"paddw " #m4 ", " #m3 " \n\t" /* x1 */\
"movq "MANGLE(ff_pw_20)", %%mm4 \n\t" /* 20 */\
@@ -2552,7 +2456,6 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
#endif
c->add_bytes= add_bytes_mmx;
- c->add_bytes_l2= add_bytes_l2_mmx;
if (!high_bit_depth)
c->draw_edges = draw_edges_mmx;
@@ -2686,8 +2589,6 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
if (HAVE_AMD3DNOW && (mm_flags & AV_CPU_FLAG_3DNOW))
c->add_hfyu_median_prediction = add_hfyu_median_prediction_cmov;
#endif
-
- c->add_png_paeth_prediction= add_png_paeth_prediction_mmx2;
} else if (HAVE_AMD3DNOW && (mm_flags & AV_CPU_FLAG_3DNOW)) {
c->prefetch = prefetch_3dnow;
@@ -2826,9 +2727,6 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
H264_QPEL_FUNCS_10(2, 0, ssse3_cache64)
H264_QPEL_FUNCS_10(3, 0, ssse3_cache64)
}
-#endif
- c->add_png_paeth_prediction= add_png_paeth_prediction_ssse3;
-#if HAVE_YASM
if (!high_bit_depth && CONFIG_H264CHROMA) {
c->put_h264_chroma_pixels_tab[0]= ff_put_h264_chroma_mc8_ssse3_rnd;
c->avg_h264_chroma_pixels_tab[0]= ff_avg_h264_chroma_mc8_ssse3_rnd;
diff --git a/libavcodec/x86/pngdsp-init.c b/libavcodec/x86/pngdsp-init.c
new file mode 100644
index 0000000..6545236
--- /dev/null
+++ b/libavcodec/x86/pngdsp-init.c
@@ -0,0 +1,135 @@
+/*
+ * x86 PNG optimizations.
+ * Copyright (c) 2008 Loren Merrit <lorenm at u.washington.edu>
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/cpu.h"
+#include "libavutil/x86_cpu.h"
+#include "libavcodec/pngdsp.h"
+#include "dsputil_mmx.h"
+
+#define PAETH(cpu, abs3)\
+static void add_png_paeth_prediction_##cpu(uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp)\
+{\
+ x86_reg i = -bpp;\
+ x86_reg end = w-3;\
+ __asm__ volatile(\
+ "pxor %%mm7, %%mm7 \n"\
+ "movd (%1,%0), %%mm0 \n"\
+ "movd (%2,%0), %%mm1 \n"\
+ "punpcklbw %%mm7, %%mm0 \n"\
+ "punpcklbw %%mm7, %%mm1 \n"\
+ "add %4, %0 \n"\
+ "1: \n"\
+ "movq %%mm1, %%mm2 \n"\
+ "movd (%2,%0), %%mm1 \n"\
+ "movq %%mm2, %%mm3 \n"\
+ "punpcklbw %%mm7, %%mm1 \n"\
+ "movq %%mm2, %%mm4 \n"\
+ "psubw %%mm1, %%mm3 \n"\
+ "psubw %%mm0, %%mm4 \n"\
+ "movq %%mm3, %%mm5 \n"\
+ "paddw %%mm4, %%mm5 \n"\
+ abs3\
+ "movq %%mm4, %%mm6 \n"\
+ "pminsw %%mm5, %%mm6 \n"\
+ "pcmpgtw %%mm6, %%mm3 \n"\
+ "pcmpgtw %%mm5, %%mm4 \n"\
+ "movq %%mm4, %%mm6 \n"\
+ "pand %%mm3, %%mm4 \n"\
+ "pandn %%mm3, %%mm6 \n"\
+ "pandn %%mm0, %%mm3 \n"\
+ "movd (%3,%0), %%mm0 \n"\
+ "pand %%mm1, %%mm6 \n"\
+ "pand %%mm4, %%mm2 \n"\
+ "punpcklbw %%mm7, %%mm0 \n"\
+ "movq %6, %%mm5 \n"\
+ "paddw %%mm6, %%mm0 \n"\
+ "paddw %%mm2, %%mm3 \n"\
+ "paddw %%mm3, %%mm0 \n"\
+ "pand %%mm5, %%mm0 \n"\
+ "movq %%mm0, %%mm3 \n"\
+ "packuswb %%mm3, %%mm3 \n"\
+ "movd %%mm3, (%1,%0) \n"\
+ "add %4, %0 \n"\
+ "cmp %5, %0 \n"\
+ "jle 1b \n"\
+ :"+r"(i)\
+ :"r"(dst), "r"(top), "r"(src), "r"((x86_reg)bpp), "g"(end),\
+ "m"(ff_pw_255)\
+ :"memory"\
+ );\
+}
+
+#define ABS3_MMX2\
+ "psubw %%mm5, %%mm7 \n"\
+ "pmaxsw %%mm7, %%mm5 \n"\
+ "pxor %%mm6, %%mm6 \n"\
+ "pxor %%mm7, %%mm7 \n"\
+ "psubw %%mm3, %%mm6 \n"\
+ "psubw %%mm4, %%mm7 \n"\
+ "pmaxsw %%mm6, %%mm3 \n"\
+ "pmaxsw %%mm7, %%mm4 \n"\
+ "pxor %%mm7, %%mm7 \n"
+
+#define ABS3_SSSE3\
+ "pabsw %%mm3, %%mm3 \n"\
+ "pabsw %%mm4, %%mm4 \n"\
+ "pabsw %%mm5, %%mm5 \n"
+
+PAETH(mmx2, ABS3_MMX2)
+#if HAVE_SSSE3
+PAETH(ssse3, ABS3_SSSE3)
+#endif
+
+static void add_bytes_l2_mmx(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w)
+{
+ x86_reg i=0;
+
+ __asm__ volatile(
+ "jmp 2f \n\t"
+ "1: \n\t"
+ "movq (%2, %0), %%mm0 \n\t"
+ "movq 8(%2, %0), %%mm1 \n\t"
+ "paddb (%3, %0), %%mm0 \n\t"
+ "paddb 8(%3, %0), %%mm1 \n\t"
+ "movq %%mm0, (%1, %0) \n\t"
+ "movq %%mm1, 8(%1, %0) \n\t"
+ "add $16, %0 \n\t"
+ "2: \n\t"
+ "cmp %4, %0 \n\t"
+ " js 1b \n\t"
+ : "+r" (i)
+ : "r"(dst), "r"(src1), "r"(src2), "r"((x86_reg) w - 15)
+ );
+ for (; i < w; i++)
+ dst[i] = src1[i] + src2[i];
+}
+
+void ff_pngdsp_init_x86(PNGDSPContext *dsp)
+{
+ int flags = av_get_cpu_flags();
+
+ if (flags & AV_CPU_FLAG_MMX)
+ dsp->add_bytes_l2 = add_bytes_l2_mmx;
+ if (flags & AV_CPU_FLAG_MMX2)
+ dsp->add_paeth_prediction = add_png_paeth_prediction_mmx2;
+ if (flags & AV_CPU_FLAG_SSSE3)
+ dsp->add_paeth_prediction = add_png_paeth_prediction_ssse3;
+}
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