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FFmpeg/libavcodec/x86/dsputil_mmx.c

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/*
* MMX optimized DSP utils
* Copyright (c) 2000, 2001 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
* MMX optimization by Nick Kurshev <nickols_k@mail.ru>
*
* 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 "config.h"
#include "libavutil/cpu.h"
#include "libavutil/x86/asm.h"
#include "dsputil_x86.h"
#include "inline_asm.h"
#if HAVE_INLINE_ASM
void ff_put_pixels_clamped_mmx(const int16_t *block, uint8_t *pixels,
int line_size)
{
const int16_t *p;
uint8_t *pix;
/* read the pixels */
p = block;
pix = pixels;
/* unrolled loop */
__asm__ volatile (
"movq (%3), %%mm0 \n\t"
"movq 8(%3), %%mm1 \n\t"
"movq 16(%3), %%mm2 \n\t"
"movq 24(%3), %%mm3 \n\t"
"movq 32(%3), %%mm4 \n\t"
"movq 40(%3), %%mm5 \n\t"
"movq 48(%3), %%mm6 \n\t"
"movq 56(%3), %%mm7 \n\t"
"packuswb %%mm1, %%mm0 \n\t"
"packuswb %%mm3, %%mm2 \n\t"
"packuswb %%mm5, %%mm4 \n\t"
"packuswb %%mm7, %%mm6 \n\t"
"movq %%mm0, (%0) \n\t"
"movq %%mm2, (%0, %1) \n\t"
"movq %%mm4, (%0, %1, 2) \n\t"
"movq %%mm6, (%0, %2) \n\t"
:: "r" (pix), "r" ((x86_reg) line_size), "r" ((x86_reg) line_size * 3),
"r" (p)
: "memory");
pix += line_size * 4;
p += 32;
// if here would be an exact copy of the code above
// compiler would generate some very strange code
// thus using "r"
__asm__ volatile (
"movq (%3), %%mm0 \n\t"
"movq 8(%3), %%mm1 \n\t"
"movq 16(%3), %%mm2 \n\t"
"movq 24(%3), %%mm3 \n\t"
"movq 32(%3), %%mm4 \n\t"
"movq 40(%3), %%mm5 \n\t"
"movq 48(%3), %%mm6 \n\t"
"movq 56(%3), %%mm7 \n\t"
"packuswb %%mm1, %%mm0 \n\t"
"packuswb %%mm3, %%mm2 \n\t"
"packuswb %%mm5, %%mm4 \n\t"
"packuswb %%mm7, %%mm6 \n\t"
"movq %%mm0, (%0) \n\t"
"movq %%mm2, (%0, %1) \n\t"
"movq %%mm4, (%0, %1, 2) \n\t"
"movq %%mm6, (%0, %2) \n\t"
:: "r" (pix), "r" ((x86_reg) line_size), "r" ((x86_reg) line_size * 3),
"r" (p)
: "memory");
}
#define put_signed_pixels_clamped_mmx_half(off) \
"movq "#off"(%2), %%mm1 \n\t" \
"movq 16 + "#off"(%2), %%mm2 \n\t" \
"movq 32 + "#off"(%2), %%mm3 \n\t" \
"movq 48 + "#off"(%2), %%mm4 \n\t" \
"packsswb 8 + "#off"(%2), %%mm1 \n\t" \
"packsswb 24 + "#off"(%2), %%mm2 \n\t" \
"packsswb 40 + "#off"(%2), %%mm3 \n\t" \
"packsswb 56 + "#off"(%2), %%mm4 \n\t" \
"paddb %%mm0, %%mm1 \n\t" \
"paddb %%mm0, %%mm2 \n\t" \
"paddb %%mm0, %%mm3 \n\t" \
"paddb %%mm0, %%mm4 \n\t" \
"movq %%mm1, (%0) \n\t" \
"movq %%mm2, (%0, %3) \n\t" \
"movq %%mm3, (%0, %3, 2) \n\t" \
"movq %%mm4, (%0, %1) \n\t"
void ff_put_signed_pixels_clamped_mmx(const int16_t *block, uint8_t *pixels,
int line_size)
{
x86_reg line_skip = line_size;
x86_reg line_skip3;
__asm__ volatile (
"movq "MANGLE(ff_pb_80)", %%mm0 \n\t"
"lea (%3, %3, 2), %1 \n\t"
put_signed_pixels_clamped_mmx_half(0)
"lea (%0, %3, 4), %0 \n\t"
put_signed_pixels_clamped_mmx_half(64)
: "+&r" (pixels), "=&r" (line_skip3)
: "r" (block), "r" (line_skip)
: "memory");
}
void ff_add_pixels_clamped_mmx(const int16_t *block, uint8_t *pixels,
int line_size)
{
const int16_t *p;
uint8_t *pix;
int i;
/* read the pixels */
p = block;
pix = pixels;
MOVQ_ZERO(mm7);
i = 4;
do {
__asm__ volatile (
"movq (%2), %%mm0 \n\t"
"movq 8(%2), %%mm1 \n\t"
"movq 16(%2), %%mm2 \n\t"
"movq 24(%2), %%mm3 \n\t"
"movq %0, %%mm4 \n\t"
"movq %1, %%mm6 \n\t"
"movq %%mm4, %%mm5 \n\t"
"punpcklbw %%mm7, %%mm4 \n\t"
"punpckhbw %%mm7, %%mm5 \n\t"
"paddsw %%mm4, %%mm0 \n\t"
"paddsw %%mm5, %%mm1 \n\t"
"movq %%mm6, %%mm5 \n\t"
"punpcklbw %%mm7, %%mm6 \n\t"
"punpckhbw %%mm7, %%mm5 \n\t"
"paddsw %%mm6, %%mm2 \n\t"
"paddsw %%mm5, %%mm3 \n\t"
"packuswb %%mm1, %%mm0 \n\t"
"packuswb %%mm3, %%mm2 \n\t"
"movq %%mm0, %0 \n\t"
"movq %%mm2, %1 \n\t"
: "+m" (*pix), "+m" (*(pix + line_size))
: "r" (p)
: "memory");
pix += line_size * 2;
p += 16;
} while (--i);
}
/* Draw the edges of width 'w' of an image of size width, height
* this MMX version can only handle w == 8 || w == 16. */
void ff_draw_edges_mmx(uint8_t *buf, int wrap, int width, int height,
int w, int h, int sides)
{
uint8_t *ptr, *last_line;
int i;
last_line = buf + (height - 1) * wrap;
/* left and right */
ptr = buf;
if (w == 8) {
__asm__ volatile (
"1: \n\t"
"movd (%0), %%mm0 \n\t"
"punpcklbw %%mm0, %%mm0 \n\t"
"punpcklwd %%mm0, %%mm0 \n\t"
"punpckldq %%mm0, %%mm0 \n\t"
"movq %%mm0, -8(%0) \n\t"
"movq -8(%0, %2), %%mm1 \n\t"
"punpckhbw %%mm1, %%mm1 \n\t"
"punpckhwd %%mm1, %%mm1 \n\t"
"punpckhdq %%mm1, %%mm1 \n\t"
"movq %%mm1, (%0, %2) \n\t"
"add %1, %0 \n\t"
"cmp %3, %0 \n\t"
"jb 1b \n\t"
: "+r" (ptr)
: "r" ((x86_reg) wrap), "r" ((x86_reg) width),
"r" (ptr + wrap * height));
} else {
__asm__ volatile (
"1: \n\t"
"movd (%0), %%mm0 \n\t"
"punpcklbw %%mm0, %%mm0 \n\t"
"punpcklwd %%mm0, %%mm0 \n\t"
"punpckldq %%mm0, %%mm0 \n\t"
"movq %%mm0, -8(%0) \n\t"
"movq %%mm0, -16(%0) \n\t"
"movq -8(%0, %2), %%mm1 \n\t"
"punpckhbw %%mm1, %%mm1 \n\t"
"punpckhwd %%mm1, %%mm1 \n\t"
"punpckhdq %%mm1, %%mm1 \n\t"
"movq %%mm1, (%0, %2) \n\t"
"movq %%mm1, 8(%0, %2) \n\t"
"add %1, %0 \n\t"
"cmp %3, %0 \n\t"
"jb 1b \n\t"
: "+r" (ptr)
: "r" ((x86_reg) wrap), "r" ((x86_reg) width),
"r" (ptr + wrap * height));
}
/* top and bottom (and hopefully also the corners) */
if (sides & EDGE_TOP) {
for (i = 0; i < h; i += 4) {
ptr = buf - (i + 1) * wrap - w;
__asm__ volatile (
"1: \n\t"
"movq (%1, %0), %%mm0 \n\t"
"movq %%mm0, (%0) \n\t"
"movq %%mm0, (%0, %2) \n\t"
"movq %%mm0, (%0, %2, 2) \n\t"
"movq %%mm0, (%0, %3) \n\t"
"add $8, %0 \n\t"
"cmp %4, %0 \n\t"
"jb 1b \n\t"
: "+r" (ptr)
: "r" ((x86_reg) buf - (x86_reg) ptr - w),
"r" ((x86_reg) - wrap), "r" ((x86_reg) - wrap * 3),
"r" (ptr + width + 2 * w));
}
}
if (sides & EDGE_BOTTOM) {
for (i = 0; i < h; i += 4) {
ptr = last_line + (i + 1) * wrap - w;
__asm__ volatile (
"1: \n\t"
"movq (%1, %0), %%mm0 \n\t"
"movq %%mm0, (%0) \n\t"
"movq %%mm0, (%0, %2) \n\t"
"movq %%mm0, (%0, %2, 2) \n\t"
"movq %%mm0, (%0, %3) \n\t"
"add $8, %0 \n\t"
"cmp %4, %0 \n\t"
"jb 1b \n\t"
: "+r" (ptr)
: "r" ((x86_reg) last_line - (x86_reg) ptr - w),
"r" ((x86_reg) wrap), "r" ((x86_reg) wrap * 3),
"r" (ptr + width + 2 * w));
}
}
}
void ff_gmc_mmx(uint8_t *dst, uint8_t *src,
int stride, int h, int ox, int oy,
int dxx, int dxy, int dyx, int dyy,
int shift, int r, int width, int height)
{
const int w = 8;
const int ix = ox >> (16 + shift);
const int iy = oy >> (16 + shift);
const int oxs = ox >> 4;
const int oys = oy >> 4;
const int dxxs = dxx >> 4;
const int dxys = dxy >> 4;
const int dyxs = dyx >> 4;
const int dyys = dyy >> 4;
const uint16_t r4[4] = { r, r, r, r };
const uint16_t dxy4[4] = { dxys, dxys, dxys, dxys };
const uint16_t dyy4[4] = { dyys, dyys, dyys, dyys };
const uint64_t shift2 = 2 * shift;
int x, y;
const int dxw = (dxx - (1 << (16 + shift))) * (w - 1);
const int dyh = (dyy - (1 << (16 + shift))) * (h - 1);
const int dxh = dxy * (h - 1);
const int dyw = dyx * (w - 1);
if ( // non-constant fullpel offset (3% of blocks)
((ox ^ (ox + dxw)) | (ox ^ (ox + dxh)) | (ox ^ (ox + dxw + dxh)) |
(oy ^ (oy + dyw)) | (oy ^ (oy + dyh)) | (oy ^ (oy + dyw + dyh))) >> (16 + shift) ||
// uses more than 16 bits of subpel mv (only at huge resolution)
(dxx | dxy | dyx | dyy) & 15 ||
(unsigned) ix >= width - w ||
(unsigned) iy >= height - h) {
// FIXME could still use mmx for some of the rows
ff_gmc_c(dst, src, stride, h, ox, oy, dxx, dxy, dyx, dyy,
shift, r, width, height);
return;
}
src += ix + iy * stride;
__asm__ volatile (
"movd %0, %%mm6 \n\t"
"pxor %%mm7, %%mm7 \n\t"
"punpcklwd %%mm6, %%mm6 \n\t"
"punpcklwd %%mm6, %%mm6 \n\t"
:: "r" (1 << shift));
for (x = 0; x < w; x += 4) {
uint16_t dx4[4] = { oxs - dxys + dxxs * (x + 0),
oxs - dxys + dxxs * (x + 1),
oxs - dxys + dxxs * (x + 2),
oxs - dxys + dxxs * (x + 3) };
uint16_t dy4[4] = { oys - dyys + dyxs * (x + 0),
oys - dyys + dyxs * (x + 1),
oys - dyys + dyxs * (x + 2),
oys - dyys + dyxs * (x + 3) };
for (y = 0; y < h; y++) {
__asm__ volatile (
"movq %0, %%mm4 \n\t"
"movq %1, %%mm5 \n\t"
"paddw %2, %%mm4 \n\t"
"paddw %3, %%mm5 \n\t"
"movq %%mm4, %0 \n\t"
"movq %%mm5, %1 \n\t"
"psrlw $12, %%mm4 \n\t"
"psrlw $12, %%mm5 \n\t"
: "+m" (*dx4), "+m" (*dy4)
: "m" (*dxy4), "m" (*dyy4));
__asm__ volatile (
"movq %%mm6, %%mm2 \n\t"
"movq %%mm6, %%mm1 \n\t"
"psubw %%mm4, %%mm2 \n\t"
"psubw %%mm5, %%mm1 \n\t"
"movq %%mm2, %%mm0 \n\t"
"movq %%mm4, %%mm3 \n\t"
"pmullw %%mm1, %%mm0 \n\t" // (s - dx) * (s - dy)
"pmullw %%mm5, %%mm3 \n\t" // dx * dy
"pmullw %%mm5, %%mm2 \n\t" // (s - dx) * dy
"pmullw %%mm4, %%mm1 \n\t" // dx * (s - dy)
"movd %4, %%mm5 \n\t"
"movd %3, %%mm4 \n\t"
"punpcklbw %%mm7, %%mm5 \n\t"
"punpcklbw %%mm7, %%mm4 \n\t"
"pmullw %%mm5, %%mm3 \n\t" // src[1, 1] * dx * dy
"pmullw %%mm4, %%mm2 \n\t" // src[0, 1] * (s - dx) * dy
"movd %2, %%mm5 \n\t"
"movd %1, %%mm4 \n\t"
"punpcklbw %%mm7, %%mm5 \n\t"
"punpcklbw %%mm7, %%mm4 \n\t"
"pmullw %%mm5, %%mm1 \n\t" // src[1, 0] * dx * (s - dy)
"pmullw %%mm4, %%mm0 \n\t" // src[0, 0] * (s - dx) * (s - dy)
"paddw %5, %%mm1 \n\t"
"paddw %%mm3, %%mm2 \n\t"
"paddw %%mm1, %%mm0 \n\t"
"paddw %%mm2, %%mm0 \n\t"
"psrlw %6, %%mm0 \n\t"
"packuswb %%mm0, %%mm0 \n\t"
"movd %%mm0, %0 \n\t"
: "=m" (dst[x + y * stride])
: "m" (src[0]), "m" (src[1]),
"m" (src[stride]), "m" (src[stride + 1]),
"m" (*r4), "m" (shift2));
src += stride;
}
src += 4 - h * stride;
}
}
#endif /* HAVE_INLINE_ASM */
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