572 lines
24 KiB
NASM
572 lines
24 KiB
NASM
;
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; jidctflt.asm - floating-point IDCT (SSE & MMX)
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;
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; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
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; Copyright (C) 2016, D. R. Commander.
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;
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; Based on the x86 SIMD extension for IJG JPEG library
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; Copyright (C) 1999-2006, MIYASAKA Masaru.
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; For conditions of distribution and use, see copyright notice in jsimdext.inc
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;
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; This file should be assembled with NASM (Netwide Assembler),
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; can *not* be assembled with Microsoft's MASM or any compatible
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; assembler (including Borland's Turbo Assembler).
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; NASM is available from http://nasm.sourceforge.net/ or
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; http://sourceforge.net/project/showfiles.php?group_id=6208
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;
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; This file contains a floating-point implementation of the inverse DCT
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; (Discrete Cosine Transform). The following code is based directly on
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; the IJG's original jidctflt.c; see the jidctflt.c for more details.
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%include "jsimdext.inc"
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%include "jdct.inc"
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; --------------------------------------------------------------------------
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%macro unpcklps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(0 1 4 5)
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shufps %1, %2, 0x44
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%endmacro
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%macro unpckhps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(2 3 6 7)
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shufps %1, %2, 0xEE
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%endmacro
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; --------------------------------------------------------------------------
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SECTION SEG_CONST
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alignz 32
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GLOBAL_DATA(jconst_idct_float_sse)
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EXTN(jconst_idct_float_sse):
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PD_1_414 times 4 dd 1.414213562373095048801689
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PD_1_847 times 4 dd 1.847759065022573512256366
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PD_1_082 times 4 dd 1.082392200292393968799446
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PD_M2_613 times 4 dd -2.613125929752753055713286
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PD_0_125 times 4 dd 0.125 ; 1/8
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PB_CENTERJSAMP times 8 db CENTERJSAMPLE
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alignz 32
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; --------------------------------------------------------------------------
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SECTION SEG_TEXT
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BITS 32
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;
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; Perform dequantization and inverse DCT on one block of coefficients.
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;
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; GLOBAL(void)
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; jsimd_idct_float_sse(void *dct_table, JCOEFPTR coef_block,
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; JSAMPARRAY output_buf, JDIMENSION output_col)
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;
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%define dct_table(b) (b) + 8 ; void *dct_table
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%define coef_block(b) (b) + 12 ; JCOEFPTR coef_block
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%define output_buf(b) (b) + 16 ; JSAMPARRAY output_buf
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%define output_col(b) (b) + 20 ; JDIMENSION output_col
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%define original_ebp ebp + 0
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%define wk(i) ebp - (WK_NUM - (i)) * SIZEOF_XMMWORD
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; xmmword wk[WK_NUM]
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%define WK_NUM 2
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%define workspace wk(0) - DCTSIZE2 * SIZEOF_FAST_FLOAT
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; FAST_FLOAT workspace[DCTSIZE2]
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align 32
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GLOBAL_FUNCTION(jsimd_idct_float_sse)
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EXTN(jsimd_idct_float_sse):
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push ebp
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mov eax, esp ; eax = original ebp
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sub esp, byte 4
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and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
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mov [esp], eax
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mov ebp, esp ; ebp = aligned ebp
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lea esp, [workspace]
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push ebx
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; push ecx ; need not be preserved
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; push edx ; need not be preserved
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push esi
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push edi
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get_GOT ebx ; get GOT address
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; ---- Pass 1: process columns from input, store into work array.
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; mov eax, [original_ebp]
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mov edx, POINTER [dct_table(eax)] ; quantptr
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mov esi, JCOEFPTR [coef_block(eax)] ; inptr
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lea edi, [workspace] ; FAST_FLOAT *wsptr
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mov ecx, DCTSIZE/4 ; ctr
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alignx 16, 7
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.columnloop:
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%ifndef NO_ZERO_COLUMN_TEST_FLOAT_SSE
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mov eax, dword [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
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or eax, dword [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
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jnz near .columnDCT
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movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
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movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
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por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
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por mm1, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
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por mm0, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
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por mm1, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
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por mm0, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
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por mm1, mm0
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packsswb mm1, mm1
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movd eax, mm1
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test eax, eax
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jnz short .columnDCT
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; -- AC terms all zero
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movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
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punpckhwd mm1, mm0 ; mm1=(** 02 ** 03)
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punpcklwd mm0, mm0 ; mm0=(00 00 01 01)
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psrad mm1, (DWORD_BIT-WORD_BIT) ; mm1=in0H=(02 03)
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psrad mm0, (DWORD_BIT-WORD_BIT) ; mm0=in0L=(00 01)
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cvtpi2ps xmm3, mm1 ; xmm3=(02 03 ** **)
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cvtpi2ps xmm0, mm0 ; xmm0=(00 01 ** **)
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movlhps xmm0, xmm3 ; xmm0=in0=(00 01 02 03)
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mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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movaps xmm1, xmm0
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movaps xmm2, xmm0
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movaps xmm3, xmm0
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shufps xmm0, xmm0, 0x00 ; xmm0=(00 00 00 00)
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shufps xmm1, xmm1, 0x55 ; xmm1=(01 01 01 01)
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shufps xmm2, xmm2, 0xAA ; xmm2=(02 02 02 02)
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shufps xmm3, xmm3, 0xFF ; xmm3=(03 03 03 03)
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movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm0
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movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm0
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movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm1
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movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm1
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movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm2
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movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm2
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movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm3
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movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3
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jmp near .nextcolumn
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alignx 16, 7
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%endif
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.columnDCT:
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; -- Even part
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movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
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movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
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movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
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movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
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punpckhwd mm4, mm0 ; mm4=(** 02 ** 03)
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punpcklwd mm0, mm0 ; mm0=(00 00 01 01)
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punpckhwd mm5, mm1 ; mm5=(** 22 ** 23)
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punpcklwd mm1, mm1 ; mm1=(20 20 21 21)
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psrad mm4, (DWORD_BIT-WORD_BIT) ; mm4=in0H=(02 03)
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psrad mm0, (DWORD_BIT-WORD_BIT) ; mm0=in0L=(00 01)
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cvtpi2ps xmm4, mm4 ; xmm4=(02 03 ** **)
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cvtpi2ps xmm0, mm0 ; xmm0=(00 01 ** **)
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psrad mm5, (DWORD_BIT-WORD_BIT) ; mm5=in2H=(22 23)
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psrad mm1, (DWORD_BIT-WORD_BIT) ; mm1=in2L=(20 21)
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cvtpi2ps xmm5, mm5 ; xmm5=(22 23 ** **)
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cvtpi2ps xmm1, mm1 ; xmm1=(20 21 ** **)
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punpckhwd mm6, mm2 ; mm6=(** 42 ** 43)
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punpcklwd mm2, mm2 ; mm2=(40 40 41 41)
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punpckhwd mm7, mm3 ; mm7=(** 62 ** 63)
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punpcklwd mm3, mm3 ; mm3=(60 60 61 61)
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psrad mm6, (DWORD_BIT-WORD_BIT) ; mm6=in4H=(42 43)
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psrad mm2, (DWORD_BIT-WORD_BIT) ; mm2=in4L=(40 41)
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cvtpi2ps xmm6, mm6 ; xmm6=(42 43 ** **)
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cvtpi2ps xmm2, mm2 ; xmm2=(40 41 ** **)
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psrad mm7, (DWORD_BIT-WORD_BIT) ; mm7=in6H=(62 63)
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psrad mm3, (DWORD_BIT-WORD_BIT) ; mm3=in6L=(60 61)
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cvtpi2ps xmm7, mm7 ; xmm7=(62 63 ** **)
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cvtpi2ps xmm3, mm3 ; xmm3=(60 61 ** **)
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movlhps xmm0, xmm4 ; xmm0=in0=(00 01 02 03)
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movlhps xmm1, xmm5 ; xmm1=in2=(20 21 22 23)
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mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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mulps xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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movlhps xmm2, xmm6 ; xmm2=in4=(40 41 42 43)
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movlhps xmm3, xmm7 ; xmm3=in6=(60 61 62 63)
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mulps xmm2, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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mulps xmm3, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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movaps xmm4, xmm0
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movaps xmm5, xmm1
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subps xmm0, xmm2 ; xmm0=tmp11
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subps xmm1, xmm3
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addps xmm4, xmm2 ; xmm4=tmp10
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addps xmm5, xmm3 ; xmm5=tmp13
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mulps xmm1, [GOTOFF(ebx,PD_1_414)]
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subps xmm1, xmm5 ; xmm1=tmp12
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movaps xmm6, xmm4
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movaps xmm7, xmm0
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subps xmm4, xmm5 ; xmm4=tmp3
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subps xmm0, xmm1 ; xmm0=tmp2
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addps xmm6, xmm5 ; xmm6=tmp0
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addps xmm7, xmm1 ; xmm7=tmp1
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movaps XMMWORD [wk(1)], xmm4 ; tmp3
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movaps XMMWORD [wk(0)], xmm0 ; tmp2
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; -- Odd part
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movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
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movq mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
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movq mm5, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
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movq mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
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punpckhwd mm6, mm4 ; mm6=(** 12 ** 13)
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punpcklwd mm4, mm4 ; mm4=(10 10 11 11)
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punpckhwd mm2, mm0 ; mm2=(** 32 ** 33)
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punpcklwd mm0, mm0 ; mm0=(30 30 31 31)
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psrad mm6, (DWORD_BIT-WORD_BIT) ; mm6=in1H=(12 13)
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psrad mm4, (DWORD_BIT-WORD_BIT) ; mm4=in1L=(10 11)
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cvtpi2ps xmm4, mm6 ; xmm4=(12 13 ** **)
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cvtpi2ps xmm2, mm4 ; xmm2=(10 11 ** **)
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psrad mm2, (DWORD_BIT-WORD_BIT) ; mm2=in3H=(32 33)
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psrad mm0, (DWORD_BIT-WORD_BIT) ; mm0=in3L=(30 31)
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cvtpi2ps xmm0, mm2 ; xmm0=(32 33 ** **)
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cvtpi2ps xmm3, mm0 ; xmm3=(30 31 ** **)
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punpckhwd mm7, mm5 ; mm7=(** 52 ** 53)
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punpcklwd mm5, mm5 ; mm5=(50 50 51 51)
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punpckhwd mm3, mm1 ; mm3=(** 72 ** 73)
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punpcklwd mm1, mm1 ; mm1=(70 70 71 71)
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movlhps xmm2, xmm4 ; xmm2=in1=(10 11 12 13)
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movlhps xmm3, xmm0 ; xmm3=in3=(30 31 32 33)
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psrad mm7, (DWORD_BIT-WORD_BIT) ; mm7=in5H=(52 53)
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psrad mm5, (DWORD_BIT-WORD_BIT) ; mm5=in5L=(50 51)
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cvtpi2ps xmm4, mm7 ; xmm4=(52 53 ** **)
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cvtpi2ps xmm5, mm5 ; xmm5=(50 51 ** **)
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psrad mm3, (DWORD_BIT-WORD_BIT) ; mm3=in7H=(72 73)
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psrad mm1, (DWORD_BIT-WORD_BIT) ; mm1=in7L=(70 71)
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cvtpi2ps xmm0, mm3 ; xmm0=(72 73 ** **)
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cvtpi2ps xmm1, mm1 ; xmm1=(70 71 ** **)
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mulps xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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mulps xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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movlhps xmm5, xmm4 ; xmm5=in5=(50 51 52 53)
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movlhps xmm1, xmm0 ; xmm1=in7=(70 71 72 73)
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mulps xmm5, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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mulps xmm1, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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movaps xmm4, xmm2
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movaps xmm0, xmm5
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addps xmm2, xmm1 ; xmm2=z11
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addps xmm5, xmm3 ; xmm5=z13
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subps xmm4, xmm1 ; xmm4=z12
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subps xmm0, xmm3 ; xmm0=z10
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movaps xmm1, xmm2
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subps xmm2, xmm5
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addps xmm1, xmm5 ; xmm1=tmp7
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mulps xmm2, [GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11
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movaps xmm3, xmm0
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addps xmm0, xmm4
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mulps xmm0, [GOTOFF(ebx,PD_1_847)] ; xmm0=z5
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mulps xmm3, [GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930)
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mulps xmm4, [GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200)
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addps xmm3, xmm0 ; xmm3=tmp12
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subps xmm4, xmm0 ; xmm4=tmp10
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; -- Final output stage
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subps xmm3, xmm1 ; xmm3=tmp6
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movaps xmm5, xmm6
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movaps xmm0, xmm7
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addps xmm6, xmm1 ; xmm6=data0=(00 01 02 03)
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addps xmm7, xmm3 ; xmm7=data1=(10 11 12 13)
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subps xmm5, xmm1 ; xmm5=data7=(70 71 72 73)
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subps xmm0, xmm3 ; xmm0=data6=(60 61 62 63)
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subps xmm2, xmm3 ; xmm2=tmp5
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movaps xmm1, xmm6 ; transpose coefficients(phase 1)
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unpcklps xmm6, xmm7 ; xmm6=(00 10 01 11)
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unpckhps xmm1, xmm7 ; xmm1=(02 12 03 13)
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movaps xmm3, xmm0 ; transpose coefficients(phase 1)
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unpcklps xmm0, xmm5 ; xmm0=(60 70 61 71)
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unpckhps xmm3, xmm5 ; xmm3=(62 72 63 73)
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movaps xmm7, XMMWORD [wk(0)] ; xmm7=tmp2
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movaps xmm5, XMMWORD [wk(1)] ; xmm5=tmp3
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movaps XMMWORD [wk(0)], xmm0 ; wk(0)=(60 70 61 71)
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movaps XMMWORD [wk(1)], xmm3 ; wk(1)=(62 72 63 73)
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addps xmm4, xmm2 ; xmm4=tmp4
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movaps xmm0, xmm7
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movaps xmm3, xmm5
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addps xmm7, xmm2 ; xmm7=data2=(20 21 22 23)
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addps xmm5, xmm4 ; xmm5=data4=(40 41 42 43)
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subps xmm0, xmm2 ; xmm0=data5=(50 51 52 53)
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subps xmm3, xmm4 ; xmm3=data3=(30 31 32 33)
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movaps xmm2, xmm7 ; transpose coefficients(phase 1)
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unpcklps xmm7, xmm3 ; xmm7=(20 30 21 31)
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unpckhps xmm2, xmm3 ; xmm2=(22 32 23 33)
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movaps xmm4, xmm5 ; transpose coefficients(phase 1)
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unpcklps xmm5, xmm0 ; xmm5=(40 50 41 51)
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unpckhps xmm4, xmm0 ; xmm4=(42 52 43 53)
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movaps xmm3, xmm6 ; transpose coefficients(phase 2)
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unpcklps2 xmm6, xmm7 ; xmm6=(00 10 20 30)
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unpckhps2 xmm3, xmm7 ; xmm3=(01 11 21 31)
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movaps xmm0, xmm1 ; transpose coefficients(phase 2)
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unpcklps2 xmm1, xmm2 ; xmm1=(02 12 22 32)
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unpckhps2 xmm0, xmm2 ; xmm0=(03 13 23 33)
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movaps xmm7, XMMWORD [wk(0)] ; xmm7=(60 70 61 71)
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movaps xmm2, XMMWORD [wk(1)] ; xmm2=(62 72 63 73)
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movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm6
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movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm3
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movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm1
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movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm0
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movaps xmm6, xmm5 ; transpose coefficients(phase 2)
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unpcklps2 xmm5, xmm7 ; xmm5=(40 50 60 70)
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unpckhps2 xmm6, xmm7 ; xmm6=(41 51 61 71)
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movaps xmm3, xmm4 ; transpose coefficients(phase 2)
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unpcklps2 xmm4, xmm2 ; xmm4=(42 52 62 72)
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unpckhps2 xmm3, xmm2 ; xmm3=(43 53 63 73)
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movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm5
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movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm6
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movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm4
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movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3
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.nextcolumn:
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add esi, byte 4*SIZEOF_JCOEF ; coef_block
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add edx, byte 4*SIZEOF_FLOAT_MULT_TYPE ; quantptr
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add edi, 4*DCTSIZE*SIZEOF_FAST_FLOAT ; wsptr
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dec ecx ; ctr
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jnz near .columnloop
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; -- Prefetch the next coefficient block
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prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 0*32]
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prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 1*32]
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prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 2*32]
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prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 3*32]
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; ---- Pass 2: process rows from work array, store into output array.
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mov eax, [original_ebp]
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lea esi, [workspace] ; FAST_FLOAT *wsptr
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mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
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mov eax, JDIMENSION [output_col(eax)]
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mov ecx, DCTSIZE/4 ; ctr
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alignx 16, 7
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.rowloop:
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; -- Even part
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movaps xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)]
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movaps xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_FAST_FLOAT)]
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movaps xmm2, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_FAST_FLOAT)]
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movaps xmm3, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_FAST_FLOAT)]
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movaps xmm4, xmm0
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movaps xmm5, xmm1
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subps xmm0, xmm2 ; xmm0=tmp11
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subps xmm1, xmm3
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addps xmm4, xmm2 ; xmm4=tmp10
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addps xmm5, xmm3 ; xmm5=tmp13
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mulps xmm1, [GOTOFF(ebx,PD_1_414)]
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subps xmm1, xmm5 ; xmm1=tmp12
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movaps xmm6, xmm4
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movaps xmm7, xmm0
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subps xmm4, xmm5 ; xmm4=tmp3
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subps xmm0, xmm1 ; xmm0=tmp2
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addps xmm6, xmm5 ; xmm6=tmp0
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addps xmm7, xmm1 ; xmm7=tmp1
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movaps XMMWORD [wk(1)], xmm4 ; tmp3
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movaps XMMWORD [wk(0)], xmm0 ; tmp2
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; -- Odd part
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movaps xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)]
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movaps xmm3, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_FAST_FLOAT)]
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movaps xmm5, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_FAST_FLOAT)]
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movaps xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_FAST_FLOAT)]
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movaps xmm4, xmm2
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movaps xmm0, xmm5
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addps xmm2, xmm1 ; xmm2=z11
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addps xmm5, xmm3 ; xmm5=z13
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subps xmm4, xmm1 ; xmm4=z12
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subps xmm0, xmm3 ; xmm0=z10
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movaps xmm1, xmm2
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subps xmm2, xmm5
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addps xmm1, xmm5 ; xmm1=tmp7
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mulps xmm2, [GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11
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movaps xmm3, xmm0
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addps xmm0, xmm4
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mulps xmm0, [GOTOFF(ebx,PD_1_847)] ; xmm0=z5
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mulps xmm3, [GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930)
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mulps xmm4, [GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200)
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addps xmm3, xmm0 ; xmm3=tmp12
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subps xmm4, xmm0 ; xmm4=tmp10
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; -- Final output stage
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subps xmm3, xmm1 ; xmm3=tmp6
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movaps xmm5, xmm6
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movaps xmm0, xmm7
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addps xmm6, xmm1 ; xmm6=data0=(00 10 20 30)
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addps xmm7, xmm3 ; xmm7=data1=(01 11 21 31)
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subps xmm5, xmm1 ; xmm5=data7=(07 17 27 37)
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subps xmm0, xmm3 ; xmm0=data6=(06 16 26 36)
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subps xmm2, xmm3 ; xmm2=tmp5
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movaps xmm1, [GOTOFF(ebx,PD_0_125)] ; xmm1=[PD_0_125]
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mulps xmm6, xmm1 ; descale(1/8)
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mulps xmm7, xmm1 ; descale(1/8)
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mulps xmm5, xmm1 ; descale(1/8)
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mulps xmm0, xmm1 ; descale(1/8)
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movhlps xmm3, xmm6
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movhlps xmm1, xmm7
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cvtps2pi mm0, xmm6 ; round to int32, mm0=data0L=(00 10)
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cvtps2pi mm1, xmm7 ; round to int32, mm1=data1L=(01 11)
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cvtps2pi mm2, xmm3 ; round to int32, mm2=data0H=(20 30)
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cvtps2pi mm3, xmm1 ; round to int32, mm3=data1H=(21 31)
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packssdw mm0, mm2 ; mm0=data0=(00 10 20 30)
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packssdw mm1, mm3 ; mm1=data1=(01 11 21 31)
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movhlps xmm6, xmm5
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movhlps xmm7, xmm0
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cvtps2pi mm4, xmm5 ; round to int32, mm4=data7L=(07 17)
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cvtps2pi mm5, xmm0 ; round to int32, mm5=data6L=(06 16)
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cvtps2pi mm6, xmm6 ; round to int32, mm6=data7H=(27 37)
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cvtps2pi mm7, xmm7 ; round to int32, mm7=data6H=(26 36)
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packssdw mm4, mm6 ; mm4=data7=(07 17 27 37)
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packssdw mm5, mm7 ; mm5=data6=(06 16 26 36)
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packsswb mm0, mm5 ; mm0=(00 10 20 30 06 16 26 36)
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packsswb mm1, mm4 ; mm1=(01 11 21 31 07 17 27 37)
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movaps xmm3, XMMWORD [wk(0)] ; xmm3=tmp2
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movaps xmm1, XMMWORD [wk(1)] ; xmm1=tmp3
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movaps xmm6, [GOTOFF(ebx,PD_0_125)] ; xmm6=[PD_0_125]
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addps xmm4, xmm2 ; xmm4=tmp4
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movaps xmm5, xmm3
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movaps xmm0, xmm1
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addps xmm3, xmm2 ; xmm3=data2=(02 12 22 32)
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addps xmm1, xmm4 ; xmm1=data4=(04 14 24 34)
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subps xmm5, xmm2 ; xmm5=data5=(05 15 25 35)
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subps xmm0, xmm4 ; xmm0=data3=(03 13 23 33)
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mulps xmm3, xmm6 ; descale(1/8)
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mulps xmm1, xmm6 ; descale(1/8)
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mulps xmm5, xmm6 ; descale(1/8)
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mulps xmm0, xmm6 ; descale(1/8)
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movhlps xmm7, xmm3
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movhlps xmm2, xmm1
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cvtps2pi mm2, xmm3 ; round to int32, mm2=data2L=(02 12)
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cvtps2pi mm3, xmm1 ; round to int32, mm3=data4L=(04 14)
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cvtps2pi mm6, xmm7 ; round to int32, mm6=data2H=(22 32)
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cvtps2pi mm7, xmm2 ; round to int32, mm7=data4H=(24 34)
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packssdw mm2, mm6 ; mm2=data2=(02 12 22 32)
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packssdw mm3, mm7 ; mm3=data4=(04 14 24 34)
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movhlps xmm4, xmm5
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movhlps xmm6, xmm0
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cvtps2pi mm5, xmm5 ; round to int32, mm5=data5L=(05 15)
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cvtps2pi mm4, xmm0 ; round to int32, mm4=data3L=(03 13)
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cvtps2pi mm6, xmm4 ; round to int32, mm6=data5H=(25 35)
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cvtps2pi mm7, xmm6 ; round to int32, mm7=data3H=(23 33)
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packssdw mm5, mm6 ; mm5=data5=(05 15 25 35)
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packssdw mm4, mm7 ; mm4=data3=(03 13 23 33)
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movq mm6, [GOTOFF(ebx,PB_CENTERJSAMP)] ; mm6=[PB_CENTERJSAMP]
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packsswb mm2, mm3 ; mm2=(02 12 22 32 04 14 24 34)
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packsswb mm4, mm5 ; mm4=(03 13 23 33 05 15 25 35)
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paddb mm0, mm6
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paddb mm1, mm6
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paddb mm2, mm6
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paddb mm4, mm6
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movq mm7, mm0 ; transpose coefficients(phase 1)
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punpcklbw mm0, mm1 ; mm0=(00 01 10 11 20 21 30 31)
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punpckhbw mm7, mm1 ; mm7=(06 07 16 17 26 27 36 37)
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movq mm3, mm2 ; transpose coefficients(phase 1)
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punpcklbw mm2, mm4 ; mm2=(02 03 12 13 22 23 32 33)
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punpckhbw mm3, mm4 ; mm3=(04 05 14 15 24 25 34 35)
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movq mm5, mm0 ; transpose coefficients(phase 2)
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punpcklwd mm0, mm2 ; mm0=(00 01 02 03 10 11 12 13)
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punpckhwd mm5, mm2 ; mm5=(20 21 22 23 30 31 32 33)
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movq mm6, mm3 ; transpose coefficients(phase 2)
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punpcklwd mm3, mm7 ; mm3=(04 05 06 07 14 15 16 17)
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punpckhwd mm6, mm7 ; mm6=(24 25 26 27 34 35 36 37)
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movq mm1, mm0 ; transpose coefficients(phase 3)
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punpckldq mm0, mm3 ; mm0=(00 01 02 03 04 05 06 07)
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punpckhdq mm1, mm3 ; mm1=(10 11 12 13 14 15 16 17)
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movq mm4, mm5 ; transpose coefficients(phase 3)
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punpckldq mm5, mm6 ; mm5=(20 21 22 23 24 25 26 27)
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punpckhdq mm4, mm6 ; mm4=(30 31 32 33 34 35 36 37)
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|
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pushpic ebx ; save GOT address
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|
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mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
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mov ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
|
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movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm0
|
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movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm1
|
|
mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
|
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mov ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
|
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movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm5
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|
movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm4
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|
|
|
poppic ebx ; restore GOT address
|
|
|
|
add esi, byte 4*SIZEOF_FAST_FLOAT ; wsptr
|
|
add edi, byte 4*SIZEOF_JSAMPROW
|
|
dec ecx ; ctr
|
|
jnz near .rowloop
|
|
|
|
emms ; empty MMX state
|
|
|
|
pop edi
|
|
pop esi
|
|
; pop edx ; need not be preserved
|
|
; pop ecx ; need not be preserved
|
|
pop ebx
|
|
mov esp, ebp ; esp <- aligned ebp
|
|
pop esp ; esp <- original ebp
|
|
pop ebp
|
|
ret
|
|
|
|
; For some reason, the OS X linker does not honor the request to align the
|
|
; segment unless we do this.
|
|
align 32
|