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ffmpeg/libavcodec/x86/idct_sse2_xvid.c

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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 Libav.
*
* 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
*
* 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 "libavcodec/dsputil.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/x86/asm.h"
#include "idct_xvid.h"
#include "dsputil_mmx.h"
#if HAVE_INLINE_ASM
/**
* @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
".p2align 4 \n\t"
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);
}
#endif /* HAVE_INLINE_ASM */
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