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FFmpeg/libavcodec/x86/idct_sse2_xvid.c
Ramiro Polla 153ca56b38 xmm_clobbers: list xmm registers first in clobber list 
suncc does not like the leading commas inside the macro, but it has no problem
with trailing commas.

Originally committed as revision 25615 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-10-31 18:14:48 +00:00

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/*
* XVID MPEG-4 VIDEO CODEC
* - SSE2 inverse discrete cosine transform -
*
* Copyright(C) 2003 Pascal Massimino <skal@planet-d.net>
*
* Conversion to gcc syntax with modifications
* by Alexander Strange <astrange@ithinksw.com>
*
* Originally from dct/x86_asm/fdct_sse2_skal.asm in Xvid.
*
* This file is part of FFmpeg.
*
* Vertical pass is an implementation of the scheme:
* Loeffler C., Ligtenberg A., and Moschytz C.S.:
* Practical Fast 1D DCT Algorithm with Eleven Multiplications,
* Proc. ICASSP 1989, 988-991.
*
* Horizontal pass is a double 4x4 vector/matrix multiplication,
* (see also Intel's Application Note 922:
* http://developer.intel.com/vtune/cbts/strmsimd/922down.htm
* Copyright (C) 1999 Intel Corporation)
*
* More details at http://skal.planet-d.net/coding/dct.html
*
* 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 "libavcodec/dsputil.h"
#include "libavutil/x86_cpu.h"
#include "idct_xvid.h"
#include "dsputil_mmx.h"
/*!
* @file
* @brief SSE2 idct compatible with xvidmmx
*/
#define X8(x) x,x,x,x,x,x,x,x
#define ROW_SHIFT 11
#define COL_SHIFT 6
DECLARE_ASM_CONST(16, int16_t, tan1)[] = {X8(13036)}; // tan( pi/16)
DECLARE_ASM_CONST(16, int16_t, tan2)[] = {X8(27146)}; // tan(2pi/16) = sqrt(2)-1
DECLARE_ASM_CONST(16, int16_t, tan3)[] = {X8(43790)}; // tan(3pi/16)-1
DECLARE_ASM_CONST(16, int16_t, sqrt2)[]= {X8(23170)}; // 0.5/sqrt(2)
DECLARE_ASM_CONST(8, uint8_t, m127)[] = {X8(127)};
DECLARE_ASM_CONST(16, int16_t, iTab1)[] = {
0x4000, 0x539f, 0xc000, 0xac61, 0x4000, 0xdd5d, 0x4000, 0xdd5d,
0x4000, 0x22a3, 0x4000, 0x22a3, 0xc000, 0x539f, 0x4000, 0xac61,
0x3249, 0x11a8, 0x4b42, 0xee58, 0x11a8, 0x4b42, 0x11a8, 0xcdb7,
0x58c5, 0x4b42, 0xa73b, 0xcdb7, 0x3249, 0xa73b, 0x4b42, 0xa73b
};
DECLARE_ASM_CONST(16, int16_t, iTab2)[] = {
0x58c5, 0x73fc, 0xa73b, 0x8c04, 0x58c5, 0xcff5, 0x58c5, 0xcff5,
0x58c5, 0x300b, 0x58c5, 0x300b, 0xa73b, 0x73fc, 0x58c5, 0x8c04,
0x45bf, 0x187e, 0x6862, 0xe782, 0x187e, 0x6862, 0x187e, 0xba41,
0x7b21, 0x6862, 0x84df, 0xba41, 0x45bf, 0x84df, 0x6862, 0x84df
};
DECLARE_ASM_CONST(16, int16_t, iTab3)[] = {
0x539f, 0x6d41, 0xac61, 0x92bf, 0x539f, 0xd2bf, 0x539f, 0xd2bf,
0x539f, 0x2d41, 0x539f, 0x2d41, 0xac61, 0x6d41, 0x539f, 0x92bf,
0x41b3, 0x1712, 0x6254, 0xe8ee, 0x1712, 0x6254, 0x1712, 0xbe4d,
0x73fc, 0x6254, 0x8c04, 0xbe4d, 0x41b3, 0x8c04, 0x6254, 0x8c04
};
DECLARE_ASM_CONST(16, int16_t, iTab4)[] = {
0x4b42, 0x6254, 0xb4be, 0x9dac, 0x4b42, 0xd746, 0x4b42, 0xd746,
0x4b42, 0x28ba, 0x4b42, 0x28ba, 0xb4be, 0x6254, 0x4b42, 0x9dac,
0x3b21, 0x14c3, 0x587e, 0xeb3d, 0x14c3, 0x587e, 0x14c3, 0xc4df,
0x6862, 0x587e, 0x979e, 0xc4df, 0x3b21, 0x979e, 0x587e, 0x979e
};
DECLARE_ASM_CONST(16, int32_t, walkenIdctRounders)[] = {
65536, 65536, 65536, 65536,
3597, 3597, 3597, 3597,
2260, 2260, 2260, 2260,
1203, 1203, 1203, 1203,
120, 120, 120, 120,
512, 512, 512, 512
};
// Temporary storage before the column pass
#define ROW1 "%%xmm6"
#define ROW3 "%%xmm4"
#define ROW5 "%%xmm5"
#define ROW7 "%%xmm7"
#define CLEAR_ODD(r) "pxor "r","r" \n\t"
#define PUT_ODD(dst) "pshufhw $0x1B, %%xmm2, "dst" \n\t"
#if ARCH_X86_64
# define ROW0 "%%xmm8"
# define REG0 ROW0
# define ROW2 "%%xmm9"
# define REG2 ROW2
# define ROW4 "%%xmm10"
# define REG4 ROW4
# define ROW6 "%%xmm11"
# define REG6 ROW6
# define CLEAR_EVEN(r) CLEAR_ODD(r)
# define PUT_EVEN(dst) PUT_ODD(dst)
# define XMMS "%%xmm12"
# define MOV_32_ONLY "#"
# define SREG2 REG2
# define TAN3 "%%xmm13"
# define TAN1 "%%xmm14"
#else
# define ROW0 "(%0)"
# define REG0 "%%xmm4"
# define ROW2 "2*16(%0)"
# define REG2 "%%xmm4"
# define ROW4 "4*16(%0)"
# define REG4 "%%xmm6"
# define ROW6 "6*16(%0)"
# define REG6 "%%xmm6"
# define CLEAR_EVEN(r)
# define PUT_EVEN(dst) \
"pshufhw $0x1B, %%xmm2, %%xmm2 \n\t" \
"movdqa %%xmm2, "dst" \n\t"
# define XMMS "%%xmm2"
# define MOV_32_ONLY "movdqa "
# define SREG2 "%%xmm7"
# define TAN3 "%%xmm0"
# define TAN1 "%%xmm2"
#endif
#define ROUND(x) "paddd "MANGLE(x)
#define JZ(reg, to) \
"testl "reg","reg" \n\t" \
"jz "to" \n\t"
#define JNZ(reg, to) \
"testl "reg","reg" \n\t" \
"jnz "to" \n\t"
#define TEST_ONE_ROW(src, reg, clear) \
clear \
"movq "src", %%mm1 \n\t" \
"por 8+"src", %%mm1 \n\t" \
"paddusb %%mm0, %%mm1 \n\t" \
"pmovmskb %%mm1, "reg" \n\t"
#define TEST_TWO_ROWS(row1, row2, reg1, reg2, clear1, clear2) \
clear1 \
clear2 \
"movq "row1", %%mm1 \n\t" \
"por 8+"row1", %%mm1 \n\t" \
"movq "row2", %%mm2 \n\t" \
"por 8+"row2", %%mm2 \n\t" \
"paddusb %%mm0, %%mm1 \n\t" \
"paddusb %%mm0, %%mm2 \n\t" \
"pmovmskb %%mm1, "reg1" \n\t" \
"pmovmskb %%mm2, "reg2" \n\t"
///IDCT pass on rows.
#define iMTX_MULT(src, table, rounder, put) \
"movdqa "src", %%xmm3 \n\t" \
"movdqa %%xmm3, %%xmm0 \n\t" \
"pshufd $0x11, %%xmm3, %%xmm1 \n\t" /* 4602 */ \
"punpcklqdq %%xmm0, %%xmm0 \n\t" /* 0246 */ \
"pmaddwd "table", %%xmm0 \n\t" \
"pmaddwd 16+"table", %%xmm1 \n\t" \
"pshufd $0xBB, %%xmm3, %%xmm2 \n\t" /* 5713 */ \
"punpckhqdq %%xmm3, %%xmm3 \n\t" /* 1357 */ \
"pmaddwd 32+"table", %%xmm2 \n\t" \
"pmaddwd 48+"table", %%xmm3 \n\t" \
"paddd %%xmm1, %%xmm0 \n\t" \
"paddd %%xmm3, %%xmm2 \n\t" \
rounder", %%xmm0 \n\t" \
"movdqa %%xmm2, %%xmm3 \n\t" \
"paddd %%xmm0, %%xmm2 \n\t" \
"psubd %%xmm3, %%xmm0 \n\t" \
"psrad $11, %%xmm2 \n\t" \
"psrad $11, %%xmm0 \n\t" \
"packssdw %%xmm0, %%xmm2 \n\t" \
put \
"1: \n\t"
#define iLLM_HEAD \
"movdqa "MANGLE(tan3)", "TAN3" \n\t" \
"movdqa "MANGLE(tan1)", "TAN1" \n\t" \
///IDCT pass on columns.
#define iLLM_PASS(dct) \
"movdqa "TAN3", %%xmm1 \n\t" \
"movdqa "TAN1", %%xmm3 \n\t" \
"pmulhw %%xmm4, "TAN3" \n\t" \
"pmulhw %%xmm5, %%xmm1 \n\t" \
"paddsw %%xmm4, "TAN3" \n\t" \
"paddsw %%xmm5, %%xmm1 \n\t" \
"psubsw %%xmm5, "TAN3" \n\t" \
"paddsw %%xmm4, %%xmm1 \n\t" \
"pmulhw %%xmm7, %%xmm3 \n\t" \
"pmulhw %%xmm6, "TAN1" \n\t" \
"paddsw %%xmm6, %%xmm3 \n\t" \
"psubsw %%xmm7, "TAN1" \n\t" \
"movdqa %%xmm3, %%xmm7 \n\t" \
"movdqa "TAN1", %%xmm6 \n\t" \
"psubsw %%xmm1, %%xmm3 \n\t" \
"psubsw "TAN3", "TAN1" \n\t" \
"paddsw %%xmm7, %%xmm1 \n\t" \
"paddsw %%xmm6, "TAN3" \n\t" \
"movdqa %%xmm3, %%xmm6 \n\t" \
"psubsw "TAN3", %%xmm3 \n\t" \
"paddsw %%xmm6, "TAN3" \n\t" \
"movdqa "MANGLE(sqrt2)", %%xmm4 \n\t" \
"pmulhw %%xmm4, %%xmm3 \n\t" \
"pmulhw %%xmm4, "TAN3" \n\t" \
"paddsw "TAN3", "TAN3" \n\t" \
"paddsw %%xmm3, %%xmm3 \n\t" \
"movdqa "MANGLE(tan2)", %%xmm7 \n\t" \
MOV_32_ONLY ROW2", "REG2" \n\t" \
MOV_32_ONLY ROW6", "REG6" \n\t" \
"movdqa %%xmm7, %%xmm5 \n\t" \
"pmulhw "REG6", %%xmm7 \n\t" \
"pmulhw "REG2", %%xmm5 \n\t" \
"paddsw "REG2", %%xmm7 \n\t" \
"psubsw "REG6", %%xmm5 \n\t" \
MOV_32_ONLY ROW0", "REG0" \n\t" \
MOV_32_ONLY ROW4", "REG4" \n\t" \
MOV_32_ONLY" "TAN1", (%0) \n\t" \
"movdqa "REG0", "XMMS" \n\t" \
"psubsw "REG4", "REG0" \n\t" \
"paddsw "XMMS", "REG4" \n\t" \
"movdqa "REG4", "XMMS" \n\t" \
"psubsw %%xmm7, "REG4" \n\t" \
"paddsw "XMMS", %%xmm7 \n\t" \
"movdqa "REG0", "XMMS" \n\t" \
"psubsw %%xmm5, "REG0" \n\t" \
"paddsw "XMMS", %%xmm5 \n\t" \
"movdqa %%xmm5, "XMMS" \n\t" \
"psubsw "TAN3", %%xmm5 \n\t" \
"paddsw "XMMS", "TAN3" \n\t" \
"movdqa "REG0", "XMMS" \n\t" \
"psubsw %%xmm3, "REG0" \n\t" \
"paddsw "XMMS", %%xmm3 \n\t" \
MOV_32_ONLY" (%0), "TAN1" \n\t" \
"psraw $6, %%xmm5 \n\t" \
"psraw $6, "REG0" \n\t" \
"psraw $6, "TAN3" \n\t" \
"psraw $6, %%xmm3 \n\t" \
"movdqa "TAN3", 1*16("dct") \n\t" \
"movdqa %%xmm3, 2*16("dct") \n\t" \
"movdqa "REG0", 5*16("dct") \n\t" \
"movdqa %%xmm5, 6*16("dct") \n\t" \
"movdqa %%xmm7, %%xmm0 \n\t" \
"movdqa "REG4", %%xmm4 \n\t" \
"psubsw %%xmm1, %%xmm7 \n\t" \
"psubsw "TAN1", "REG4" \n\t" \
"paddsw %%xmm0, %%xmm1 \n\t" \
"paddsw %%xmm4, "TAN1" \n\t" \
"psraw $6, %%xmm1 \n\t" \
"psraw $6, %%xmm7 \n\t" \
"psraw $6, "TAN1" \n\t" \
"psraw $6, "REG4" \n\t" \
"movdqa %%xmm1, ("dct") \n\t" \
"movdqa "TAN1", 3*16("dct") \n\t" \
"movdqa "REG4", 4*16("dct") \n\t" \
"movdqa %%xmm7, 7*16("dct") \n\t"
///IDCT pass on columns, assuming rows 4-7 are zero.
#define iLLM_PASS_SPARSE(dct) \
"pmulhw %%xmm4, "TAN3" \n\t" \
"paddsw %%xmm4, "TAN3" \n\t" \
"movdqa %%xmm6, %%xmm3 \n\t" \
"pmulhw %%xmm6, "TAN1" \n\t" \
"movdqa %%xmm4, %%xmm1 \n\t" \
"psubsw %%xmm1, %%xmm3 \n\t" \
"paddsw %%xmm6, %%xmm1 \n\t" \
"movdqa "TAN1", %%xmm6 \n\t" \
"psubsw "TAN3", "TAN1" \n\t" \
"paddsw %%xmm6, "TAN3" \n\t" \
"movdqa %%xmm3, %%xmm6 \n\t" \
"psubsw "TAN3", %%xmm3 \n\t" \
"paddsw %%xmm6, "TAN3" \n\t" \
"movdqa "MANGLE(sqrt2)", %%xmm4 \n\t" \
"pmulhw %%xmm4, %%xmm3 \n\t" \
"pmulhw %%xmm4, "TAN3" \n\t" \
"paddsw "TAN3", "TAN3" \n\t" \
"paddsw %%xmm3, %%xmm3 \n\t" \
"movdqa "MANGLE(tan2)", %%xmm5 \n\t" \
MOV_32_ONLY ROW2", "SREG2" \n\t" \
"pmulhw "SREG2", %%xmm5 \n\t" \
MOV_32_ONLY ROW0", "REG0" \n\t" \
"movdqa "REG0", %%xmm6 \n\t" \
"psubsw "SREG2", %%xmm6 \n\t" \
"paddsw "REG0", "SREG2" \n\t" \
MOV_32_ONLY" "TAN1", (%0) \n\t" \
"movdqa "REG0", "XMMS" \n\t" \
"psubsw %%xmm5, "REG0" \n\t" \
"paddsw "XMMS", %%xmm5 \n\t" \
"movdqa %%xmm5, "XMMS" \n\t" \
"psubsw "TAN3", %%xmm5 \n\t" \
"paddsw "XMMS", "TAN3" \n\t" \
"movdqa "REG0", "XMMS" \n\t" \
"psubsw %%xmm3, "REG0" \n\t" \
"paddsw "XMMS", %%xmm3 \n\t" \
MOV_32_ONLY" (%0), "TAN1" \n\t" \
"psraw $6, %%xmm5 \n\t" \
"psraw $6, "REG0" \n\t" \
"psraw $6, "TAN3" \n\t" \
"psraw $6, %%xmm3 \n\t" \
"movdqa "TAN3", 1*16("dct") \n\t" \
"movdqa %%xmm3, 2*16("dct") \n\t" \
"movdqa "REG0", 5*16("dct") \n\t" \
"movdqa %%xmm5, 6*16("dct") \n\t" \
"movdqa "SREG2", %%xmm0 \n\t" \
"movdqa %%xmm6, %%xmm4 \n\t" \
"psubsw %%xmm1, "SREG2" \n\t" \
"psubsw "TAN1", %%xmm6 \n\t" \
"paddsw %%xmm0, %%xmm1 \n\t" \
"paddsw %%xmm4, "TAN1" \n\t" \
"psraw $6, %%xmm1 \n\t" \
"psraw $6, "SREG2" \n\t" \
"psraw $6, "TAN1" \n\t" \
"psraw $6, %%xmm6 \n\t" \
"movdqa %%xmm1, ("dct") \n\t" \
"movdqa "TAN1", 3*16("dct") \n\t" \
"movdqa %%xmm6, 4*16("dct") \n\t" \
"movdqa "SREG2", 7*16("dct") \n\t"
inline void ff_idct_xvid_sse2(short *block)
{
__asm__ volatile(
"movq "MANGLE(m127)", %%mm0 \n\t"
iMTX_MULT("(%0)", MANGLE(iTab1), ROUND(walkenIdctRounders), PUT_EVEN(ROW0))
iMTX_MULT("1*16(%0)", MANGLE(iTab2), ROUND(walkenIdctRounders+1*16), PUT_ODD(ROW1))
iMTX_MULT("2*16(%0)", MANGLE(iTab3), ROUND(walkenIdctRounders+2*16), PUT_EVEN(ROW2))
TEST_TWO_ROWS("3*16(%0)", "4*16(%0)", "%%eax", "%%ecx", CLEAR_ODD(ROW3), CLEAR_EVEN(ROW4))
JZ("%%eax", "1f")
iMTX_MULT("3*16(%0)", MANGLE(iTab4), ROUND(walkenIdctRounders+3*16), PUT_ODD(ROW3))
TEST_TWO_ROWS("5*16(%0)", "6*16(%0)", "%%eax", "%%edx", CLEAR_ODD(ROW5), CLEAR_EVEN(ROW6))
TEST_ONE_ROW("7*16(%0)", "%%esi", CLEAR_ODD(ROW7))
iLLM_HEAD
ASMALIGN(4)
JNZ("%%ecx", "2f")
JNZ("%%eax", "3f")
JNZ("%%edx", "4f")
JNZ("%%esi", "5f")
iLLM_PASS_SPARSE("%0")
"jmp 6f \n\t"
"2: \n\t"
iMTX_MULT("4*16(%0)", MANGLE(iTab1), "#", PUT_EVEN(ROW4))
"3: \n\t"
iMTX_MULT("5*16(%0)", MANGLE(iTab4), ROUND(walkenIdctRounders+4*16), PUT_ODD(ROW5))
JZ("%%edx", "1f")
"4: \n\t"
iMTX_MULT("6*16(%0)", MANGLE(iTab3), ROUND(walkenIdctRounders+5*16), PUT_EVEN(ROW6))
JZ("%%esi", "1f")
"5: \n\t"
iMTX_MULT("7*16(%0)", MANGLE(iTab2), ROUND(walkenIdctRounders+5*16), PUT_ODD(ROW7))
#if !ARCH_X86_64
iLLM_HEAD
#endif
iLLM_PASS("%0")
"6: \n\t"
: "+r"(block)
:
: XMM_CLOBBERS("%xmm0" , "%xmm1" , "%xmm2" , "%xmm3" ,
"%xmm4" , "%xmm5" , "%xmm6" , "%xmm7" ,)
#if ARCH_X86_64
XMM_CLOBBERS("%xmm8" , "%xmm9" , "%xmm10", "%xmm11",
"%xmm12", "%xmm13", "%xmm14",)
#endif
"%eax", "%ecx", "%edx", "%esi", "memory"
);
}
void ff_idct_xvid_sse2_put(uint8_t *dest, int line_size, short *block)
{
ff_idct_xvid_sse2(block);
ff_put_pixels_clamped_mmx(block, dest, line_size);
}
void ff_idct_xvid_sse2_add(uint8_t *dest, int line_size, short *block)
{
ff_idct_xvid_sse2(block);
ff_add_pixels_clamped_mmx(block, dest, line_size);
}
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