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* new mmx code - based upon http://aggregate.org/MAGIC

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for now it's rather sneak preview (new functions are nearly 100% faster)

Originally committed as revision 623 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Zdenek Kabelac 23 years ago
parent 541027e26a
commit def60345ad
1 changed files with 103 additions and 2 deletions
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  1. 105
      libavcodec/i386/dsputil_mmx.c

105
libavcodec/i386/dsputil_mmx.c
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@ -49,6 +49,7 @@ void ff_mmx_idct(DCTELEM *block);
void ff_mmxext_idct(DCTELEM *block);
/* pixel operations */
static const uint64_t mm_bfe __attribute__ ((aligned(8))) = 0xfefefefefefefefeULL;
static const uint64_t mm_bone __attribute__ ((aligned(8))) = 0x0101010101010101ULL;
static const uint64_t mm_wone __attribute__ ((aligned(8))) = 0x0001000100010001ULL;
static const uint64_t mm_wtwo __attribute__ ((aligned(8))) = 0x0002000200020002ULL;
@ -62,6 +63,7 @@ static const uint64_t mm_wtwo __attribute__ ((aligned(8))) = 0x0002000200020002U
#define MOVQ_WONE(regd) __asm __volatile ("movq %0, %%" #regd " \n\t" ::"m"(mm_wone))
#define MOVQ_WTWO(regd) __asm __volatile ("movq %0, %%" #regd " \n\t" ::"m"(mm_wtwo))
#define MOVQ_BONE(regd) "movq "MANGLE(mm_bone)", "#regd" \n\t"
#define MOVQ_BFE(regd) "movq "MANGLE(mm_bfe)", "#regd" \n\t"
#else
// for shared library it's better to use this way for accessing constants
// pcmpeqd -> -1
@ -80,8 +82,31 @@ static const uint64_t mm_wtwo __attribute__ ((aligned(8))) = 0x0002000200020002U
"pcmpeqd " #regd ", " #regd " \n\t" \
"psrlw $15, " #regd " \n\t"\
"packuswb " #regd ", " #regd " \n\t"
#define MOVQ_BFE(regd) \
"pcmpeqd " #regd ", " #regd " \n\t"\
"paddb " #regd ", " #regd " \n\t"
#endif
// using mm6 as temporary and for the output result
// first argument is unmodifed and second is trashed
// mm7 is supposed to contain 0xfefefefefefefefe
#define PAVG_MMX_NO_RND(rega, regb) \
"movq " #rega ", %%mm6 \n\t"\
"pand " #regb ", %%mm6 \n\t"\
"pxor " #rega ", " #regb " \n\t"\
"pand %%mm7, " #regb " \n\t"\
"psrlq $1, " #regb " \n\t"\
"paddb " #regb ", %%mm6 \n\t"
#define PAVG_MMX(rega, regb) \
"movq " #rega ", %%mm6 \n\t"\
"por " #regb ", %%mm6 \n\t"\
"pxor " #rega ", " #regb " \n\t"\
"pand %%mm7, " #regb " \n\t"\
"psrlq $1, " #regb " \n\t"\
"psubb " #regb ", %%mm6 \n\t"
/***********************************/
/* 3Dnow specific */
@ -291,8 +316,12 @@ static void put_pixels_mmx(UINT8 *block, const UINT8 *pixels, int line_size, int
);
}
// will have to be check if it's better to have bigger
// unrolled code also on Celerons - for now yes
#define LONG_UNROLL 1
static void put_pixels_x2_mmx(UINT8 *block, const UINT8 *pixels, int line_size, int h)
{
#if 0
UINT8 *p;
const UINT8 *pix;
p = block;
@ -301,7 +330,7 @@ static void put_pixels_x2_mmx(UINT8 *block, const UINT8 *pixels, int line_size,
MOVQ_WONE(mm4);
JUMPALIGN();
do {
__asm __volatile(
__asm __volatile(
"movq %1, %%mm0\n\t"
"movq 1%1, %%mm1\n\t"
"movq %%mm0, %%mm2\n\t"
@ -320,13 +349,50 @@ static void put_pixels_x2_mmx(UINT8 *block, const UINT8 *pixels, int line_size,
"movq %%mm0, %0\n\t"
:"=m"(*p)
:"m"(*pix)
:"memory");
:"memory");
pix += line_size; p += line_size;
} while (--h);
#else
__asm __volatile(
MOVQ_BFE(%%mm7)
"lea (%3, %3), %%eax \n\t"
".balign 8 \n\t"
"1: \n\t"
"movq (%1), %%mm0 \n\t"
"movq (%1, %3), %%mm2 \n\t"
"movq 1(%1), %%mm1 \n\t"
"movq 1(%1, %3), %%mm3 \n\t"
PAVG_MMX(%%mm0, %%mm1)
"movq %%mm6, (%2) \n\t"
PAVG_MMX(%%mm2, %%mm3)
"movq %%mm6, (%2, %3) \n\t"
"addl %%eax, %1 \n\t"
"addl %%eax, %2 \n\t"
#if LONG_UNROLL
"movq (%1), %%mm0 \n\t"
"movq (%1, %3), %%mm2 \n\t"
"movq 1(%1), %%mm1 \n\t"
"movq 1(%1, %3), %%mm3 \n\t"
PAVG_MMX(%%mm0, %%mm1)
"movq %%mm6, (%2) \n\t"
PAVG_MMX(%%mm2, %%mm3)
"movq %%mm6, (%2, %3) \n\t"
"addl %%eax, %1 \n\t"
"addl %%eax, %2 \n\t"
"subl $4, %0 \n\t"
#else
"subl $2, %0 \n\t"
#endif
"jnz 1b \n\t"
:"+g"(h), "+S"(pixels), "+D"(block)
:"r"(line_size)
:"eax", "memory");
#endif
}
static void put_pixels_y2_mmx(UINT8 *block, const UINT8 *pixels, int line_size, int h)
{
#if 0
UINT8 *p;
const UINT8 *pix;
p = block;
@ -359,6 +425,41 @@ static void put_pixels_y2_mmx(UINT8 *block, const UINT8 *pixels, int line_size,
pix += line_size;
p += line_size;
} while (--h);
#else
__asm __volatile(
MOVQ_BFE(%%mm7)
"lea (%3, %3), %%eax \n\t"
"movq (%1), %%mm0 \n\t"
".balign 8 \n\t"
"1: \n\t"
"movq (%1, %3), %%mm1 \n\t"
"movq (%1, %%eax),%%mm2 \n\t"
PAVG_MMX(%%mm1, %%mm0)
"movq %%mm6, (%2) \n\t"
PAVG_MMX(%%mm2, %%mm1)
"movq %%mm6, (%2, %3) \n\t"
"addl %%eax, %1 \n\t"
"addl %%eax, %2 \n\t"
#ifdef LONG_UNROLL
"movq (%1, %3), %%mm1 \n\t"
"movq (%1, %%eax),%%mm0 \n\t"
PAVG_MMX(%%mm1, %%mm2)
"movq %%mm6, (%2) \n\t"
PAVG_MMX(%%mm0, %%mm1)
"movq %%mm6, (%2, %3) \n\t"
"addl %%eax, %1 \n\t"
"addl %%eax, %2 \n\t"
"subl $4, %0 \n\t"
#else
"subl $2, %0 \n\t"
#endif
"jnz 1b \n\t"
:"+g"(h), "+S"(pixels), "+D"(block)
:"r"(line_size)
:"eax", "memory");
#endif
}
static void put_pixels_xy2_mmx(UINT8 *block, const UINT8 *pixels, int line_size, int h)

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