mirror of
https://bitbucket.org/CPMADevs/cnq3
synced 2024-12-14 14:21:31 +00:00
233 lines
8.8 KiB
NASM
233 lines
8.8 KiB
NASM
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; jquant.asm - sample data conversion and quantization (3DNow! & MMX)
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;
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; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
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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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; [TAB8]
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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_3dnow (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 16
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global EXTN(jsimd_convsamp_float_3dnow)
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EXTN(jsimd_convsamp_float_3dnow):
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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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pi2fd mm4,mm4
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pi2fd mm2,mm2
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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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pi2fd mm5,mm5
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pi2fd mm0,mm0
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movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], mm4
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movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], mm2
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movq MMWORD [MMBLOCK(0,2,edi,SIZEOF_FAST_FLOAT)], mm5
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movq MMWORD [MMBLOCK(0,3,edi,SIZEOF_FAST_FLOAT)], mm0
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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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pi2fd mm6,mm6
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pi2fd mm3,mm3
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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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pi2fd mm4,mm4
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pi2fd mm1,mm1
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movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], mm6
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movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], mm3
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movq MMWORD [MMBLOCK(1,2,edi,SIZEOF_FAST_FLOAT)], mm4
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movq MMWORD [MMBLOCK(1,3,edi,SIZEOF_FAST_FLOAT)], mm1
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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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femms ; empty MMX/3DNow! 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_3dnow (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 16
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global EXTN(jsimd_quantize_float_3dnow)
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EXTN(jsimd_quantize_float_3dnow):
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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 eax, 0x4B400000 ; (float)0x00C00000 (rndint_magic)
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movd mm7,eax
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punpckldq mm7,mm7 ; mm7={12582912.0F 12582912.0F}
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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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movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)]
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movq mm1, MMWORD [MMBLOCK(0,1,esi,SIZEOF_FAST_FLOAT)]
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pfmul mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)]
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pfmul mm1, MMWORD [MMBLOCK(0,1,edx,SIZEOF_FAST_FLOAT)]
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movq mm2, MMWORD [MMBLOCK(0,2,esi,SIZEOF_FAST_FLOAT)]
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movq mm3, MMWORD [MMBLOCK(0,3,esi,SIZEOF_FAST_FLOAT)]
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pfmul mm2, MMWORD [MMBLOCK(0,2,edx,SIZEOF_FAST_FLOAT)]
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pfmul mm3, MMWORD [MMBLOCK(0,3,edx,SIZEOF_FAST_FLOAT)]
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pfadd mm0,mm7 ; mm0=(00 ** 01 **)
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pfadd mm1,mm7 ; mm1=(02 ** 03 **)
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pfadd mm2,mm7 ; mm0=(04 ** 05 **)
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pfadd mm3,mm7 ; mm1=(06 ** 07 **)
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movq mm4,mm0
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punpcklwd mm0,mm1 ; mm0=(00 02 ** **)
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punpckhwd mm4,mm1 ; mm4=(01 03 ** **)
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movq mm5,mm2
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punpcklwd mm2,mm3 ; mm2=(04 06 ** **)
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punpckhwd mm5,mm3 ; mm5=(05 07 ** **)
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punpcklwd mm0,mm4 ; mm0=(00 01 02 03)
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punpcklwd mm2,mm5 ; mm2=(04 05 06 07)
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movq mm6, MMWORD [MMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)]
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movq mm1, MMWORD [MMBLOCK(1,1,esi,SIZEOF_FAST_FLOAT)]
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pfmul mm6, MMWORD [MMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)]
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pfmul mm1, MMWORD [MMBLOCK(1,1,edx,SIZEOF_FAST_FLOAT)]
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movq mm3, MMWORD [MMBLOCK(1,2,esi,SIZEOF_FAST_FLOAT)]
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movq mm4, MMWORD [MMBLOCK(1,3,esi,SIZEOF_FAST_FLOAT)]
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pfmul mm3, MMWORD [MMBLOCK(1,2,edx,SIZEOF_FAST_FLOAT)]
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pfmul mm4, MMWORD [MMBLOCK(1,3,edx,SIZEOF_FAST_FLOAT)]
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pfadd mm6,mm7 ; mm0=(10 ** 11 **)
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pfadd mm1,mm7 ; mm4=(12 ** 13 **)
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pfadd mm3,mm7 ; mm0=(14 ** 15 **)
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pfadd mm4,mm7 ; mm4=(16 ** 17 **)
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movq mm5,mm6
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punpcklwd mm6,mm1 ; mm6=(10 12 ** **)
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punpckhwd mm5,mm1 ; mm5=(11 13 ** **)
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movq mm1,mm3
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punpcklwd mm3,mm4 ; mm3=(14 16 ** **)
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punpckhwd mm1,mm4 ; mm1=(15 17 ** **)
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punpcklwd mm6,mm5 ; mm6=(10 11 12 13)
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punpcklwd mm3,mm1 ; mm3=(14 15 16 17)
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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)], mm2
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movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm6
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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 near .quantloop
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femms ; empty MMX/3DNow! 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 16
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