;
; jfdctflt.asm - floating-point FDCT (3DNow!)
;
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
;
; Based on
; 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),
; can *not* be assembled with Microsoft's MASM or any compatible
; assembler (including Borland's Turbo Assembler).
; NASM is available from http://nasm.sourceforge.net/ or
; http://sourceforge.net/project/showfiles.php?group_id=6208
;
; This file contains a floating-point implementation of the forward DCT
; (Discrete Cosine Transform). The following code is based directly on
; the IJG's original jfdctflt.c; see the jfdctflt.c for more details.
;
; [TAB8]
%include "jsimdext.inc"
%include "jdct.inc"
; --------------------------------------------------------------------------
SECTION SEG_CONST
alignz 16
global EXTN(jconst_fdct_float_3dnow)
EXTN(jconst_fdct_float_3dnow):
PD_0_382 times 2 dd 0.382683432365089771728460
PD_0_707 times 2 dd 0.707106781186547524400844
PD_0_541 times 2 dd 0.541196100146196984399723
PD_1_306 times 2 dd 1.306562964876376527856643
alignz 16
; --------------------------------------------------------------------------
SECTION SEG_TEXT
BITS 32
;
; Perform the forward DCT on one block of samples.
;
; GLOBAL(void)
; jsimd_fdct_float_3dnow (FAST_FLOAT * data)
;
%define data(b) (b)+8 ; FAST_FLOAT * data
%define original_ebp ebp+0
%define wk(i) ebp-(WK_NUM-(i))*SIZEOF_MMWORD ; mmword wk[WK_NUM]
%define WK_NUM 2
align 16
global EXTN(jsimd_fdct_float_3dnow)
EXTN(jsimd_fdct_float_3dnow):
push ebp
mov eax,esp ; eax = original ebp
sub esp, byte 4
and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits
mov [esp],eax
mov ebp,esp ; ebp = aligned ebp
lea esp, [wk(0)]
pushpic ebx
; push ecx ; need not be preserved
; push edx ; need not be preserved
; push esi ; unused
; push edi ; unused
get_GOT ebx ; get GOT address
; ---- Pass 1: process rows.
mov edx, POINTER [data(eax)] ; (FAST_FLOAT *)
mov ecx, DCTSIZE/2
alignx 16,7
.rowloop:
movq mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)]
movq mm1, MMWORD [MMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)]
movq mm2, MMWORD [MMBLOCK(0,3,edx,SIZEOF_FAST_FLOAT)]
movq mm3, MMWORD [MMBLOCK(1,3,edx,SIZEOF_FAST_FLOAT)]
; mm0=(00 01), mm1=(10 11), mm2=(06 07), mm3=(16 17)
movq mm4,mm0 ; transpose coefficients
punpckldq mm0,mm1 ; mm0=(00 10)=data0
punpckhdq mm4,mm1 ; mm4=(01 11)=data1
movq mm5,mm2 ; transpose coefficients
punpckldq mm2,mm3 ; mm2=(06 16)=data6
punpckhdq mm5,mm3 ; mm5=(07 17)=data7
movq mm6,mm4
movq mm7,mm0
pfsub mm4,mm2 ; mm4=data1-data6=tmp6
pfsub mm0,mm5 ; mm0=data0-data7=tmp7
pfadd mm6,mm2 ; mm6=data1+data6=tmp1
pfadd mm7,mm5 ; mm7=data0+data7=tmp0
movq mm1, MMWORD [MMBLOCK(0,1,edx,SIZEOF_FAST_FLOAT)]
movq mm3, MMWORD [MMBLOCK(1,1,edx,SIZEOF_FAST_FLOAT)]
movq mm2, MMWORD [MMBLOCK(0,2,edx,SIZEOF_FAST_FLOAT)]
movq mm5, MMWORD [MMBLOCK(1,2,edx,SIZEOF_FAST_FLOAT)]
; mm1=(02 03), mm3=(12 13), mm2=(04 05), mm5=(14 15)
movq MMWORD [wk(0)], mm4 ; wk(0)=tmp6
movq MMWORD [wk(1)], mm0 ; wk(1)=tmp7
movq mm4,mm1 ; transpose coefficients
punpckldq mm1,mm3 ; mm1=(02 12)=data2
punpckhdq mm4,mm3 ; mm4=(03 13)=data3
movq mm0,mm2 ; transpose coefficients
punpckldq mm2,mm5 ; mm2=(04 14)=data4
punpckhdq mm0,mm5 ; mm0=(05 15)=data5
movq mm3,mm4
movq mm5,mm1
pfadd mm4,mm2 ; mm4=data3+data4=tmp3
pfadd mm1,mm0 ; mm1=data2+data5=tmp2
pfsub mm3,mm2 ; mm3=data3-data4=tmp4
pfsub mm5,mm0 ; mm5=data2-data5=tmp5
; -- Even part
movq mm2,mm7
movq mm0,mm6
pfsub mm7,mm4 ; mm7=tmp13
pfsub mm6,mm1 ; mm6=tmp12
pfadd mm2,mm4 ; mm2=tmp10
pfadd mm0,mm1 ; mm0=tmp11
pfadd mm6,mm7
pfmul mm6,[GOTOFF(ebx,PD_0_707)] ; mm6=z1
movq mm4,mm2
movq mm1,mm7
pfsub mm2,mm0 ; mm2=data4
pfsub mm7,mm6 ; mm7=data6
pfadd mm4,mm0 ; mm4=data0
pfadd mm1,mm6 ; mm1=data2
movq MMWORD [MMBLOCK(0,2,edx,SIZEOF_FAST_FLOAT)], mm2
movq MMWORD [MMBLOCK(0,3,edx,SIZEOF_FAST_FLOAT)], mm7
movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)], mm4
movq MMWORD [MMBLOCK(0,1,edx,SIZEOF_FAST_FLOAT)], mm1
; -- Odd part
movq mm0, MMWORD [wk(0)] ; mm0=tmp6
movq mm6, MMWORD [wk(1)] ; mm6=tmp7
pfadd mm3,mm5 ; mm3=tmp10
pfadd mm5,mm0 ; mm5=tmp11
pfadd mm0,mm6 ; mm0=tmp12, mm6=tmp7
pfmul mm5,[GOTOFF(ebx,PD_0_707)] ; mm5=z3
movq mm2,mm3 ; mm2=tmp10
pfsub mm3,mm0
pfmul mm3,[GOTOFF(ebx,PD_0_382)] ; mm3=z5
pfmul mm2,[GOTOFF(ebx,PD_0_541)] ; mm2=MULTIPLY(tmp10,FIX_0_54119610)
pfmul mm0,[GOTOFF(ebx,PD_1_306)] ; mm0=MULTIPLY(tmp12,FIX_1_30656296)
pfadd mm2,mm3 ; mm2=z2
pfadd mm0,mm3 ; mm0=z4
movq mm7,mm6
pfsub mm6,mm5 ; mm6=z13
pfadd mm7,mm5 ; mm7=z11
movq mm4,mm6
movq mm1,mm7
pfsub mm6,mm2 ; mm6=data3
pfsub mm7,mm0 ; mm7=data7
pfadd mm4,mm2 ; mm4=data5
pfadd mm1,mm0 ; mm1=data1
movq MMWORD [MMBLOCK(1,1,edx,SIZEOF_FAST_FLOAT)], mm6
movq MMWORD [MMBLOCK(1,3,edx,SIZEOF_FAST_FLOAT)], mm7
movq MMWORD [MMBLOCK(1,2,edx,SIZEOF_FAST_FLOAT)], mm4
movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)], mm1
add edx, byte 2*DCTSIZE*SIZEOF_FAST_FLOAT
dec ecx
jnz near .rowloop
; ---- Pass 2: process columns.
mov edx, POINTER [data(eax)] ; (FAST_FLOAT *)
mov ecx, DCTSIZE/2
alignx 16,7
.columnloop:
movq mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)]
movq mm1, MMWORD [MMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)]
movq mm2, MMWORD [MMBLOCK(6,0,edx,SIZEOF_FAST_FLOAT)]
movq mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_FAST_FLOAT)]
; mm0=(00 10), mm1=(01 11), mm2=(60 70), mm3=(61 71)
movq mm4,mm0 ; transpose coefficients
punpckldq mm0,mm1 ; mm0=(00 01)=data0
punpckhdq mm4,mm1 ; mm4=(10 11)=data1
movq mm5,mm2 ; transpose coefficients
punpckldq mm2,mm3 ; mm2=(60 61)=data6
punpckhdq mm5,mm3 ; mm5=(70 71)=data7
movq mm6,mm4
movq mm7,mm0
pfsub mm4,mm2 ; mm4=data1-data6=tmp6
pfsub mm0,mm5 ; mm0=data0-data7=tmp7
pfadd mm6,mm2 ; mm6=data1+data6=tmp1
pfadd mm7,mm5 ; mm7=data0+data7=tmp0
movq mm1, MMWORD [MMBLOCK(2,0,edx,SIZEOF_FAST_FLOAT)]
movq mm3, MMWORD [MMBLOCK(3,0,edx,SIZEOF_FAST_FLOAT)]
movq mm2, MMWORD [MMBLOCK(4,0,edx,SIZEOF_FAST_FLOAT)]
movq mm5, MMWORD [MMBLOCK(5,0,edx,SIZEOF_FAST_FLOAT)]
; mm1=(20 30), mm3=(21 31), mm2=(40 50), mm5=(41 51)
movq MMWORD [wk(0)], mm4 ; wk(0)=tmp6
movq MMWORD [wk(1)], mm0 ; wk(1)=tmp7
movq mm4,mm1 ; transpose coefficients
punpckldq mm1,mm3 ; mm1=(20 21)=data2
punpckhdq mm4,mm3 ; mm4=(30 31)=data3
movq mm0,mm2 ; transpose coefficients
punpckldq mm2,mm5 ; mm2=(40 41)=data4
punpckhdq mm0,mm5 ; mm0=(50 51)=data5
movq mm3,mm4
movq mm5,mm1
pfadd mm4,mm2 ; mm4=data3+data4=tmp3
pfadd mm1,mm0 ; mm1=data2+data5=tmp2
pfsub mm3,mm2 ; mm3=data3-data4=tmp4
pfsub mm5,mm0 ; mm5=data2-data5=tmp5
; -- Even part
movq mm2,mm7
movq mm0,mm6
pfsub mm7,mm4 ; mm7=tmp13
pfsub mm6,mm1 ; mm6=tmp12
pfadd mm2,mm4 ; mm2=tmp10
pfadd mm0,mm1 ; mm0=tmp11
pfadd mm6,mm7
pfmul mm6,[GOTOFF(ebx,PD_0_707)] ; mm6=z1
movq mm4,mm2
movq mm1,mm7
pfsub mm2,mm0 ; mm2=data4
pfsub mm7,mm6 ; mm7=data6
pfadd mm4,mm0 ; mm4=data0
pfadd mm1,mm6 ; mm1=data2
movq MMWORD [MMBLOCK(4,0,edx,SIZEOF_FAST_FLOAT)], mm2
movq MMWORD [MMBLOCK(6,0,edx,SIZEOF_FAST_FLOAT)], mm7
movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)], mm4
movq MMWORD [MMBLOCK(2,0,edx,SIZEOF_FAST_FLOAT)], mm1
; -- Odd part
movq mm0, MMWORD [wk(0)] ; mm0=tmp6
movq mm6, MMWORD [wk(1)] ; mm6=tmp7
pfadd mm3,mm5 ; mm3=tmp10
pfadd mm5,mm0 ; mm5=tmp11
pfadd mm0,mm6 ; mm0=tmp12, mm6=tmp7
pfmul mm5,[GOTOFF(ebx,PD_0_707)] ; mm5=z3
movq mm2,mm3 ; mm2=tmp10
pfsub mm3,mm0
pfmul mm3,[GOTOFF(ebx,PD_0_382)] ; mm3=z5
pfmul mm2,[GOTOFF(ebx,PD_0_541)] ; mm2=MULTIPLY(tmp10,FIX_0_54119610)
pfmul mm0,[GOTOFF(ebx,PD_1_306)] ; mm0=MULTIPLY(tmp12,FIX_1_30656296)
pfadd mm2,mm3 ; mm2=z2
pfadd mm0,mm3 ; mm0=z4
movq mm7,mm6
pfsub mm6,mm5 ; mm6=z13
pfadd mm7,mm5 ; mm7=z11
movq mm4,mm6
movq mm1,mm7
pfsub mm6,mm2 ; mm6=data3
pfsub mm7,mm0 ; mm7=data7
pfadd mm4,mm2 ; mm4=data5
pfadd mm1,mm0 ; mm1=data1
movq MMWORD [MMBLOCK(3,0,edx,SIZEOF_FAST_FLOAT)], mm6
movq MMWORD [MMBLOCK(7,0,edx,SIZEOF_FAST_FLOAT)], mm7
movq MMWORD [MMBLOCK(5,0,edx,SIZEOF_FAST_FLOAT)], mm4
movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)], mm1
add edx, byte 2*SIZEOF_FAST_FLOAT
dec ecx
jnz near .columnloop
femms ; empty MMX/3DNow! state
; pop edi ; unused
; pop esi ; unused
; pop edx ; need not be preserved
; pop ecx ; need not be preserved
poppic 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 16