209 lines
7.4 KiB
NASM
209 lines
7.4 KiB
NASM
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; jquant.asm - sample data conversion and quantization (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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%include "jsimdext.inc"
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%include "jdct.inc"
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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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; Load data into workspace, applying unsigned->signed conversion
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;
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; GLOBAL(void)
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; jsimd_convsamp_float_sse(JSAMPARRAY sample_data, JDIMENSION start_col,
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; FAST_FLOAT *workspace);
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;
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%define sample_data ebp + 8 ; JSAMPARRAY sample_data
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%define start_col ebp + 12 ; JDIMENSION start_col
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%define workspace ebp + 16 ; FAST_FLOAT *workspace
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align 32
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GLOBAL_FUNCTION(jsimd_convsamp_float_sse)
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EXTN(jsimd_convsamp_float_sse):
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push ebp
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mov ebp, esp
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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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pcmpeqw mm7, mm7
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psllw mm7, 7
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packsswb mm7, mm7 ; mm7 = PB_CENTERJSAMPLE (0x808080..)
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mov esi, JSAMPARRAY [sample_data] ; (JSAMPROW *)
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mov eax, JDIMENSION [start_col]
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mov edi, POINTER [workspace] ; (DCTELEM *)
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mov ecx, DCTSIZE/2
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alignx 16, 7
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.convloop:
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mov ebx, JSAMPROW [esi+0*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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mov edx, JSAMPROW [esi+1*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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movq mm0, MMWORD [ebx+eax*SIZEOF_JSAMPLE]
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movq mm1, MMWORD [edx+eax*SIZEOF_JSAMPLE]
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psubb mm0, mm7 ; mm0=(01234567)
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psubb mm1, mm7 ; mm1=(89ABCDEF)
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punpcklbw mm2, mm0 ; mm2=(*0*1*2*3)
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punpckhbw mm0, mm0 ; mm0=(*4*5*6*7)
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punpcklbw mm3, mm1 ; mm3=(*8*9*A*B)
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punpckhbw mm1, mm1 ; mm1=(*C*D*E*F)
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punpcklwd mm4, mm2 ; mm4=(***0***1)
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punpckhwd mm2, mm2 ; mm2=(***2***3)
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punpcklwd mm5, mm0 ; mm5=(***4***5)
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punpckhwd mm0, mm0 ; mm0=(***6***7)
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psrad mm4, (DWORD_BIT-BYTE_BIT) ; mm4=(01)
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psrad mm2, (DWORD_BIT-BYTE_BIT) ; mm2=(23)
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cvtpi2ps xmm0, mm4 ; xmm0=(01**)
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cvtpi2ps xmm1, mm2 ; xmm1=(23**)
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psrad mm5, (DWORD_BIT-BYTE_BIT) ; mm5=(45)
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psrad mm0, (DWORD_BIT-BYTE_BIT) ; mm0=(67)
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cvtpi2ps xmm2, mm5 ; xmm2=(45**)
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cvtpi2ps xmm3, mm0 ; xmm3=(67**)
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punpcklwd mm6, mm3 ; mm6=(***8***9)
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punpckhwd mm3, mm3 ; mm3=(***A***B)
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punpcklwd mm4, mm1 ; mm4=(***C***D)
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punpckhwd mm1, mm1 ; mm1=(***E***F)
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psrad mm6, (DWORD_BIT-BYTE_BIT) ; mm6=(89)
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psrad mm3, (DWORD_BIT-BYTE_BIT) ; mm3=(AB)
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cvtpi2ps xmm4, mm6 ; xmm4=(89**)
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cvtpi2ps xmm5, mm3 ; xmm5=(AB**)
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psrad mm4, (DWORD_BIT-BYTE_BIT) ; mm4=(CD)
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psrad mm1, (DWORD_BIT-BYTE_BIT) ; mm1=(EF)
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cvtpi2ps xmm6, mm4 ; xmm6=(CD**)
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cvtpi2ps xmm7, mm1 ; xmm7=(EF**)
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movlhps xmm0, xmm1 ; xmm0=(0123)
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movlhps xmm2, xmm3 ; xmm2=(4567)
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movlhps xmm4, xmm5 ; xmm4=(89AB)
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movlhps xmm6, xmm7 ; xmm6=(CDEF)
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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)], xmm2
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movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm4
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movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm6
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add esi, byte 2*SIZEOF_JSAMPROW
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add edi, byte 2*DCTSIZE*SIZEOF_FAST_FLOAT
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dec ecx
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jnz near .convloop
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emms ; empty MMX state
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pop edi
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pop esi
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; pop edx ; need not be preserved
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; pop ecx ; need not be preserved
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pop ebx
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pop ebp
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ret
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; --------------------------------------------------------------------------
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;
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; Quantize/descale the coefficients, and store into coef_block
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;
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; GLOBAL(void)
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; jsimd_quantize_float_sse(JCOEFPTR coef_block, FAST_FLOAT *divisors,
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; FAST_FLOAT *workspace);
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;
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%define coef_block ebp + 8 ; JCOEFPTR coef_block
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%define divisors ebp + 12 ; FAST_FLOAT *divisors
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%define workspace ebp + 16 ; FAST_FLOAT *workspace
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align 32
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GLOBAL_FUNCTION(jsimd_quantize_float_sse)
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EXTN(jsimd_quantize_float_sse):
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push ebp
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mov ebp, esp
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; push ebx ; unused
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; push ecx ; unused
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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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mov esi, POINTER [workspace]
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mov edx, POINTER [divisors]
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mov edi, JCOEFPTR [coef_block]
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mov eax, DCTSIZE2/16
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alignx 16, 7
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.quantloop:
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movaps xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)]
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movaps xmm1, XMMWORD [XMMBLOCK(0,1,esi,SIZEOF_FAST_FLOAT)]
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mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)]
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mulps xmm1, XMMWORD [XMMBLOCK(0,1,edx,SIZEOF_FAST_FLOAT)]
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movaps xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)]
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movaps xmm3, XMMWORD [XMMBLOCK(1,1,esi,SIZEOF_FAST_FLOAT)]
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mulps xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)]
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mulps xmm3, XMMWORD [XMMBLOCK(1,1,edx,SIZEOF_FAST_FLOAT)]
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movhlps xmm4, xmm0
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movhlps xmm5, xmm1
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cvtps2pi mm0, xmm0
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cvtps2pi mm1, xmm1
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cvtps2pi mm4, xmm4
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cvtps2pi mm5, xmm5
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movhlps xmm6, xmm2
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movhlps xmm7, xmm3
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cvtps2pi mm2, xmm2
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cvtps2pi mm3, xmm3
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cvtps2pi mm6, xmm6
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cvtps2pi mm7, xmm7
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packssdw mm0, mm4
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packssdw mm1, mm5
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packssdw mm2, mm6
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packssdw mm3, mm7
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movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm0
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movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_JCOEF)], mm1
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movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm2
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movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_JCOEF)], mm3
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add esi, byte 16*SIZEOF_FAST_FLOAT
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add edx, byte 16*SIZEOF_FAST_FLOAT
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add edi, byte 16*SIZEOF_JCOEF
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dec eax
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jnz short .quantloop
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emms ; empty MMX state
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pop edi
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pop esi
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; pop edx ; need not be preserved
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; pop ecx ; unused
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; pop ebx ; unused
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pop ebp
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ret
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; For some reason, the OS X linker does not honor the request to align the
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; segment unless we do this.
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align 32
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