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;
; jquant.asm - sample data conversion and quantization (3DNow! & MMX)
;
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
; Copyright (C) 2016, 2024, D. R. Commander.
;
; Based on the x86 SIMD extension for IJG JPEG library
; Copyright (C) 1999-2006, MIYASAKA Masaru.
; For conditions of distribution and use, see copyright notice in jsimdext.inc
;
; This file should be assembled with NASM (Netwide Assembler) or Yasm.
%include "jsimdext.inc"
%include "jdct.inc"
; --------------------------------------------------------------------------
SECTION SEG_TEXT
BITS 32
;
; Load data into workspace, applying unsigned->signed conversion
;
; GLOBAL(void)
; jsimd_convsamp_float_3dnow(JSAMPARRAY sample_data, JDIMENSION start_col,
; FAST_FLOAT *workspace);
;
%define sample_data ebp + 8 ; JSAMPARRAY sample_data
%define start_col ebp + 12 ; JDIMENSION start_col
%define workspace ebp + 16 ; FAST_FLOAT *workspace
align 32
GLOBAL_FUNCTION(jsimd_convsamp_float_3dnow)
EXTN(jsimd_convsamp_float_3dnow):
push ebp
mov ebp, esp
push ebx
; push ecx ; need not be preserved
; push edx ; need not be preserved
push esi
push edi
pcmpeqw mm7, mm7
psllw mm7, 7
packsswb mm7, mm7 ; mm7 = PB_CENTERJSAMPLE (0x808080..)
mov esi, JSAMPARRAY [sample_data] ; (JSAMPROW *)
mov eax, JDIMENSION [start_col]
mov edi, POINTER [workspace] ; (DCTELEM *)
mov ecx, DCTSIZE/2
ALIGNX 16, 7
.convloop:
mov ebx, JSAMPROW [esi+0*SIZEOF_JSAMPROW] ; (JSAMPLE *)
mov edx, JSAMPROW [esi+1*SIZEOF_JSAMPROW] ; (JSAMPLE *)
movq mm0, MMWORD [ebx+eax*SIZEOF_JSAMPLE]
movq mm1, MMWORD [edx+eax*SIZEOF_JSAMPLE]
psubb mm0, mm7 ; mm0=(01234567)
psubb mm1, mm7 ; mm1=(89ABCDEF)
punpcklbw mm2, mm0 ; mm2=(*0*1*2*3)
punpckhbw mm0, mm0 ; mm0=(*4*5*6*7)
punpcklbw mm3, mm1 ; mm3=(*8*9*A*B)
punpckhbw mm1, mm1 ; mm1=(*C*D*E*F)
punpcklwd mm4, mm2 ; mm4=(***0***1)
punpckhwd mm2, mm2 ; mm2=(***2***3)
punpcklwd mm5, mm0 ; mm5=(***4***5)
punpckhwd mm0, mm0 ; mm0=(***6***7)
psrad mm4, (DWORD_BIT-BYTE_BIT) ; mm4=(01)
psrad mm2, (DWORD_BIT-BYTE_BIT) ; mm2=(23)
pi2fd mm4, mm4
pi2fd mm2, mm2
psrad mm5, (DWORD_BIT-BYTE_BIT) ; mm5=(45)
psrad mm0, (DWORD_BIT-BYTE_BIT) ; mm0=(67)
pi2fd mm5, mm5
pi2fd mm0, mm0
movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], mm4
movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], mm2
movq MMWORD [MMBLOCK(0,2,edi,SIZEOF_FAST_FLOAT)], mm5
movq MMWORD [MMBLOCK(0,3,edi,SIZEOF_FAST_FLOAT)], mm0
punpcklwd mm6, mm3 ; mm6=(***8***9)
punpckhwd mm3, mm3 ; mm3=(***A***B)
punpcklwd mm4, mm1 ; mm4=(***C***D)
punpckhwd mm1, mm1 ; mm1=(***E***F)
psrad mm6, (DWORD_BIT-BYTE_BIT) ; mm6=(89)
psrad mm3, (DWORD_BIT-BYTE_BIT) ; mm3=(AB)
pi2fd mm6, mm6
pi2fd mm3, mm3
psrad mm4, (DWORD_BIT-BYTE_BIT) ; mm4=(CD)
psrad mm1, (DWORD_BIT-BYTE_BIT) ; mm1=(EF)
pi2fd mm4, mm4
pi2fd mm1, mm1
movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], mm6
movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], mm3
movq MMWORD [MMBLOCK(1,2,edi,SIZEOF_FAST_FLOAT)], mm4
movq MMWORD [MMBLOCK(1,3,edi,SIZEOF_FAST_FLOAT)], mm1
add esi, byte 2*SIZEOF_JSAMPROW
add edi, byte 2*DCTSIZE*SIZEOF_FAST_FLOAT
dec ecx
jnz near .convloop
femms ; empty MMX/3DNow! state
pop edi
pop esi
; pop edx ; need not be preserved
; pop ecx ; need not be preserved
pop ebx
pop ebp
ret
; --------------------------------------------------------------------------
;
; Quantize/descale the coefficients, and store into coef_block
;
; GLOBAL(void)
; jsimd_quantize_float_3dnow(JCOEFPTR coef_block, FAST_FLOAT *divisors,
; FAST_FLOAT *workspace);
;
%define coef_block ebp + 8 ; JCOEFPTR coef_block
%define divisors ebp + 12 ; FAST_FLOAT *divisors
%define workspace ebp + 16 ; FAST_FLOAT *workspace
align 32
GLOBAL_FUNCTION(jsimd_quantize_float_3dnow)
EXTN(jsimd_quantize_float_3dnow):
push ebp
mov ebp, esp
; push ebx ; unused
; push ecx ; unused
; push edx ; need not be preserved
push esi
push edi
mov eax, 0x4B400000 ; (float)0x00C00000 (rndint_magic)
movd mm7, eax
punpckldq mm7, mm7 ; mm7={12582912.0F 12582912.0F}
mov esi, POINTER [workspace]
mov edx, POINTER [divisors]
mov edi, JCOEFPTR [coef_block]
mov eax, DCTSIZE2/16
ALIGNX 16, 7
.quantloop:
movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)]
movq mm1, MMWORD [MMBLOCK(0,1,esi,SIZEOF_FAST_FLOAT)]
pfmul mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)]
pfmul mm1, MMWORD [MMBLOCK(0,1,edx,SIZEOF_FAST_FLOAT)]
movq mm2, MMWORD [MMBLOCK(0,2,esi,SIZEOF_FAST_FLOAT)]
movq mm3, MMWORD [MMBLOCK(0,3,esi,SIZEOF_FAST_FLOAT)]
pfmul mm2, MMWORD [MMBLOCK(0,2,edx,SIZEOF_FAST_FLOAT)]
pfmul mm3, MMWORD [MMBLOCK(0,3,edx,SIZEOF_FAST_FLOAT)]
pfadd mm0, mm7 ; mm0=(00 ** 01 **)
pfadd mm1, mm7 ; mm1=(02 ** 03 **)
pfadd mm2, mm7 ; mm0=(04 ** 05 **)
pfadd mm3, mm7 ; mm1=(06 ** 07 **)
movq mm4, mm0
punpcklwd mm0, mm1 ; mm0=(00 02 ** **)
punpckhwd mm4, mm1 ; mm4=(01 03 ** **)
movq mm5, mm2
punpcklwd mm2, mm3 ; mm2=(04 06 ** **)
punpckhwd mm5, mm3 ; mm5=(05 07 ** **)
punpcklwd mm0, mm4 ; mm0=(00 01 02 03)
punpcklwd mm2, mm5 ; mm2=(04 05 06 07)
movq mm6, MMWORD [MMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)]
movq mm1, MMWORD [MMBLOCK(1,1,esi,SIZEOF_FAST_FLOAT)]
pfmul mm6, MMWORD [MMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)]
pfmul mm1, MMWORD [MMBLOCK(1,1,edx,SIZEOF_FAST_FLOAT)]
movq mm3, MMWORD [MMBLOCK(1,2,esi,SIZEOF_FAST_FLOAT)]
movq mm4, MMWORD [MMBLOCK(1,3,esi,SIZEOF_FAST_FLOAT)]
pfmul mm3, MMWORD [MMBLOCK(1,2,edx,SIZEOF_FAST_FLOAT)]
pfmul mm4, MMWORD [MMBLOCK(1,3,edx,SIZEOF_FAST_FLOAT)]
pfadd mm6, mm7 ; mm0=(10 ** 11 **)
pfadd mm1, mm7 ; mm4=(12 ** 13 **)
pfadd mm3, mm7 ; mm0=(14 ** 15 **)
pfadd mm4, mm7 ; mm4=(16 ** 17 **)
movq mm5, mm6
punpcklwd mm6, mm1 ; mm6=(10 12 ** **)
punpckhwd mm5, mm1 ; mm5=(11 13 ** **)
movq mm1, mm3
punpcklwd mm3, mm4 ; mm3=(14 16 ** **)
punpckhwd mm1, mm4 ; mm1=(15 17 ** **)
punpcklwd mm6, mm5 ; mm6=(10 11 12 13)
punpcklwd mm3, mm1 ; mm3=(14 15 16 17)
movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm0
movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_JCOEF)], mm2
movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm6
movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_JCOEF)], mm3
add esi, byte 16*SIZEOF_FAST_FLOAT
add edx, byte 16*SIZEOF_FAST_FLOAT
add edi, byte 16*SIZEOF_JCOEF
dec eax
jnz near .quantloop
femms ; empty MMX/3DNow! state
pop edi
pop esi
; pop edx ; need not be preserved
; pop ecx ; unused
; pop ebx ; unused
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