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mozjpeg/simd/jfdctfst-mmx.asm
DRC 123f7258a8 Format copyright headers more consistently 
The IJG convention is to format copyright notices as:

Copyright (C) YYYY, Owner.

We try to maintain this convention for any code that is part of the
libjpeg API library (with the exception of preserving the copyright
notices from Cendio's code verbatim, since those predate
libjpeg-turbo.)

Note that the phrase "All Rights Reserved" is no longer necessary, since
all Buenos Aires Convention signatories signed onto the Berne Convention
in 2000.  However, our convention is to retain this phrase for any files
that have a self-contained copyright header but to leave it off of any
files that refer to another file for conditions of distribution and use.
For instance, all of the non-SIMD files in the libjpeg API library refer
to README.ijg, and the copyright message in that file contains "All
Rights Reserved", so it is unnecessary to add it to the individual
files.

The TurboJPEG code retains my preferred formatting convention for
copyright notices, which is based on that of VirtualGL (where the
TurboJPEG API originated.)
2016-05-28 19:16:58 -05:00

397 lines
15 KiB
NASM
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;
; jfdctfst.asm - fast integer FDCT (MMX)
;
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
;
; 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),
; 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 fast, not so accurate integer implementation of
; the forward DCT (Discrete Cosine Transform). The following code is
; based directly on the IJG's original jfdctfst.c; see the jfdctfst.c
; for more details.
;
; [TAB8]
%include "jsimdext.inc"
%include "jdct.inc"
; --------------------------------------------------------------------------
%define CONST_BITS 8 ; 14 is also OK.
%if CONST_BITS == 8
F_0_382 equ 98 ; FIX(0.382683433)
F_0_541 equ 139 ; FIX(0.541196100)
F_0_707 equ 181 ; FIX(0.707106781)
F_1_306 equ 334 ; FIX(1.306562965)
%else
; NASM cannot do compile-time arithmetic on floating-point constants.
%define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n))
F_0_382 equ DESCALE( 410903207,30-CONST_BITS) ; FIX(0.382683433)
F_0_541 equ DESCALE( 581104887,30-CONST_BITS) ; FIX(0.541196100)
F_0_707 equ DESCALE( 759250124,30-CONST_BITS) ; FIX(0.707106781)
F_1_306 equ DESCALE(1402911301,30-CONST_BITS) ; FIX(1.306562965)
%endif
; --------------------------------------------------------------------------
SECTION SEG_CONST
; PRE_MULTIPLY_SCALE_BITS <= 2 (to avoid overflow)
; CONST_BITS + CONST_SHIFT + PRE_MULTIPLY_SCALE_BITS == 16 (for pmulhw)
%define PRE_MULTIPLY_SCALE_BITS 2
%define CONST_SHIFT (16 - PRE_MULTIPLY_SCALE_BITS - CONST_BITS)
alignz 16
global EXTN(jconst_fdct_ifast_mmx)
EXTN(jconst_fdct_ifast_mmx):
PW_F0707 times 4 dw F_0_707 << CONST_SHIFT
PW_F0382 times 4 dw F_0_382 << CONST_SHIFT
PW_F0541 times 4 dw F_0_541 << CONST_SHIFT
PW_F1306 times 4 dw F_1_306 << CONST_SHIFT
alignz 16
; --------------------------------------------------------------------------
SECTION SEG_TEXT
BITS 32
;
; Perform the forward DCT on one block of samples.
;
; GLOBAL(void)
; jsimd_fdct_ifast_mmx (DCTELEM *data)
;
%define data(b) (b)+8 ; DCTELEM *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_ifast_mmx)
EXTN(jsimd_fdct_ifast_mmx):
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)] ; (DCTELEM *)
mov ecx, DCTSIZE/4
alignx 16,7
.rowloop:
movq mm0, MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)]
movq mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)]
movq mm2, MMWORD [MMBLOCK(2,1,edx,SIZEOF_DCTELEM)]
movq mm3, MMWORD [MMBLOCK(3,1,edx,SIZEOF_DCTELEM)]
; mm0=(20 21 22 23), mm2=(24 25 26 27)
; mm1=(30 31 32 33), mm3=(34 35 36 37)
movq mm4,mm0 ; transpose coefficients(phase 1)
punpcklwd mm0,mm1 ; mm0=(20 30 21 31)
punpckhwd mm4,mm1 ; mm4=(22 32 23 33)
movq mm5,mm2 ; transpose coefficients(phase 1)
punpcklwd mm2,mm3 ; mm2=(24 34 25 35)
punpckhwd mm5,mm3 ; mm5=(26 36 27 37)
movq mm6, MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)]
movq mm7, MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)]
movq mm1, MMWORD [MMBLOCK(0,1,edx,SIZEOF_DCTELEM)]
movq mm3, MMWORD [MMBLOCK(1,1,edx,SIZEOF_DCTELEM)]
; mm6=(00 01 02 03), mm1=(04 05 06 07)
; mm7=(10 11 12 13), mm3=(14 15 16 17)
movq MMWORD [wk(0)], mm4 ; wk(0)=(22 32 23 33)
movq MMWORD [wk(1)], mm2 ; wk(1)=(24 34 25 35)
movq mm4,mm6 ; transpose coefficients(phase 1)
punpcklwd mm6,mm7 ; mm6=(00 10 01 11)
punpckhwd mm4,mm7 ; mm4=(02 12 03 13)
movq mm2,mm1 ; transpose coefficients(phase 1)
punpcklwd mm1,mm3 ; mm1=(04 14 05 15)
punpckhwd mm2,mm3 ; mm2=(06 16 07 17)
movq mm7,mm6 ; transpose coefficients(phase 2)
punpckldq mm6,mm0 ; mm6=(00 10 20 30)=data0
punpckhdq mm7,mm0 ; mm7=(01 11 21 31)=data1
movq mm3,mm2 ; transpose coefficients(phase 2)
punpckldq mm2,mm5 ; mm2=(06 16 26 36)=data6
punpckhdq mm3,mm5 ; mm3=(07 17 27 37)=data7
movq mm0,mm7
movq mm5,mm6
psubw mm7,mm2 ; mm7=data1-data6=tmp6
psubw mm6,mm3 ; mm6=data0-data7=tmp7
paddw mm0,mm2 ; mm0=data1+data6=tmp1
paddw mm5,mm3 ; mm5=data0+data7=tmp0
movq mm2, MMWORD [wk(0)] ; mm2=(22 32 23 33)
movq mm3, MMWORD [wk(1)] ; mm3=(24 34 25 35)
movq MMWORD [wk(0)], mm7 ; wk(0)=tmp6
movq MMWORD [wk(1)], mm6 ; wk(1)=tmp7
movq mm7,mm4 ; transpose coefficients(phase 2)
punpckldq mm4,mm2 ; mm4=(02 12 22 32)=data2
punpckhdq mm7,mm2 ; mm7=(03 13 23 33)=data3
movq mm6,mm1 ; transpose coefficients(phase 2)
punpckldq mm1,mm3 ; mm1=(04 14 24 34)=data4
punpckhdq mm6,mm3 ; mm6=(05 15 25 35)=data5
movq mm2,mm7
movq mm3,mm4
paddw mm7,mm1 ; mm7=data3+data4=tmp3
paddw mm4,mm6 ; mm4=data2+data5=tmp2
psubw mm2,mm1 ; mm2=data3-data4=tmp4
psubw mm3,mm6 ; mm3=data2-data5=tmp5
; -- Even part
movq mm1,mm5
movq mm6,mm0
psubw mm5,mm7 ; mm5=tmp13
psubw mm0,mm4 ; mm0=tmp12
paddw mm1,mm7 ; mm1=tmp10
paddw mm6,mm4 ; mm6=tmp11
paddw mm0,mm5
psllw mm0,PRE_MULTIPLY_SCALE_BITS
pmulhw mm0,[GOTOFF(ebx,PW_F0707)] ; mm0=z1
movq mm7,mm1
movq mm4,mm5
psubw mm1,mm6 ; mm1=data4
psubw mm5,mm0 ; mm5=data6
paddw mm7,mm6 ; mm7=data0
paddw mm4,mm0 ; mm4=data2
movq MMWORD [MMBLOCK(0,1,edx,SIZEOF_DCTELEM)], mm1
movq MMWORD [MMBLOCK(2,1,edx,SIZEOF_DCTELEM)], mm5
movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)], mm7
movq MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)], mm4
; -- Odd part
movq mm6, MMWORD [wk(0)] ; mm6=tmp6
movq mm0, MMWORD [wk(1)] ; mm0=tmp7
paddw mm2,mm3 ; mm2=tmp10
paddw mm3,mm6 ; mm3=tmp11
paddw mm6,mm0 ; mm6=tmp12, mm0=tmp7
psllw mm2,PRE_MULTIPLY_SCALE_BITS
psllw mm6,PRE_MULTIPLY_SCALE_BITS
psllw mm3,PRE_MULTIPLY_SCALE_BITS
pmulhw mm3,[GOTOFF(ebx,PW_F0707)] ; mm3=z3
movq mm1,mm2 ; mm1=tmp10
psubw mm2,mm6
pmulhw mm2,[GOTOFF(ebx,PW_F0382)] ; mm2=z5
pmulhw mm1,[GOTOFF(ebx,PW_F0541)] ; mm1=MULTIPLY(tmp10,FIX_0_54119610)
pmulhw mm6,[GOTOFF(ebx,PW_F1306)] ; mm6=MULTIPLY(tmp12,FIX_1_30656296)
paddw mm1,mm2 ; mm1=z2
paddw mm6,mm2 ; mm6=z4
movq mm5,mm0
psubw mm0,mm3 ; mm0=z13
paddw mm5,mm3 ; mm5=z11
movq mm7,mm0
movq mm4,mm5
psubw mm0,mm1 ; mm0=data3
psubw mm5,mm6 ; mm5=data7
paddw mm7,mm1 ; mm7=data5
paddw mm4,mm6 ; mm4=data1
movq MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)], mm0
movq MMWORD [MMBLOCK(3,1,edx,SIZEOF_DCTELEM)], mm5
movq MMWORD [MMBLOCK(1,1,edx,SIZEOF_DCTELEM)], mm7
movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)], mm4
add edx, byte 4*DCTSIZE*SIZEOF_DCTELEM
dec ecx
jnz near .rowloop
; ---- Pass 2: process columns.
mov edx, POINTER [data(eax)] ; (DCTELEM *)
mov ecx, DCTSIZE/4
alignx 16,7
.columnloop:
movq mm0, MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)]
movq mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)]
movq mm2, MMWORD [MMBLOCK(6,0,edx,SIZEOF_DCTELEM)]
movq mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_DCTELEM)]
; mm0=(02 12 22 32), mm2=(42 52 62 72)
; mm1=(03 13 23 33), mm3=(43 53 63 73)
movq mm4,mm0 ; transpose coefficients(phase 1)
punpcklwd mm0,mm1 ; mm0=(02 03 12 13)
punpckhwd mm4,mm1 ; mm4=(22 23 32 33)
movq mm5,mm2 ; transpose coefficients(phase 1)
punpcklwd mm2,mm3 ; mm2=(42 43 52 53)
punpckhwd mm5,mm3 ; mm5=(62 63 72 73)
movq mm6, MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)]
movq mm7, MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)]
movq mm1, MMWORD [MMBLOCK(4,0,edx,SIZEOF_DCTELEM)]
movq mm3, MMWORD [MMBLOCK(5,0,edx,SIZEOF_DCTELEM)]
; mm6=(00 10 20 30), mm1=(40 50 60 70)
; mm7=(01 11 21 31), mm3=(41 51 61 71)
movq MMWORD [wk(0)], mm4 ; wk(0)=(22 23 32 33)
movq MMWORD [wk(1)], mm2 ; wk(1)=(42 43 52 53)
movq mm4,mm6 ; transpose coefficients(phase 1)
punpcklwd mm6,mm7 ; mm6=(00 01 10 11)
punpckhwd mm4,mm7 ; mm4=(20 21 30 31)
movq mm2,mm1 ; transpose coefficients(phase 1)
punpcklwd mm1,mm3 ; mm1=(40 41 50 51)
punpckhwd mm2,mm3 ; mm2=(60 61 70 71)
movq mm7,mm6 ; transpose coefficients(phase 2)
punpckldq mm6,mm0 ; mm6=(00 01 02 03)=data0
punpckhdq mm7,mm0 ; mm7=(10 11 12 13)=data1
movq mm3,mm2 ; transpose coefficients(phase 2)
punpckldq mm2,mm5 ; mm2=(60 61 62 63)=data6
punpckhdq mm3,mm5 ; mm3=(70 71 72 73)=data7
movq mm0,mm7
movq mm5,mm6
psubw mm7,mm2 ; mm7=data1-data6=tmp6
psubw mm6,mm3 ; mm6=data0-data7=tmp7
paddw mm0,mm2 ; mm0=data1+data6=tmp1
paddw mm5,mm3 ; mm5=data0+data7=tmp0
movq mm2, MMWORD [wk(0)] ; mm2=(22 23 32 33)
movq mm3, MMWORD [wk(1)] ; mm3=(42 43 52 53)
movq MMWORD [wk(0)], mm7 ; wk(0)=tmp6
movq MMWORD [wk(1)], mm6 ; wk(1)=tmp7
movq mm7,mm4 ; transpose coefficients(phase 2)
punpckldq mm4,mm2 ; mm4=(20 21 22 23)=data2
punpckhdq mm7,mm2 ; mm7=(30 31 32 33)=data3
movq mm6,mm1 ; transpose coefficients(phase 2)
punpckldq mm1,mm3 ; mm1=(40 41 42 43)=data4
punpckhdq mm6,mm3 ; mm6=(50 51 52 53)=data5
movq mm2,mm7
movq mm3,mm4
paddw mm7,mm1 ; mm7=data3+data4=tmp3
paddw mm4,mm6 ; mm4=data2+data5=tmp2
psubw mm2,mm1 ; mm2=data3-data4=tmp4
psubw mm3,mm6 ; mm3=data2-data5=tmp5
; -- Even part
movq mm1,mm5
movq mm6,mm0
psubw mm5,mm7 ; mm5=tmp13
psubw mm0,mm4 ; mm0=tmp12
paddw mm1,mm7 ; mm1=tmp10
paddw mm6,mm4 ; mm6=tmp11
paddw mm0,mm5
psllw mm0,PRE_MULTIPLY_SCALE_BITS
pmulhw mm0,[GOTOFF(ebx,PW_F0707)] ; mm0=z1
movq mm7,mm1
movq mm4,mm5
psubw mm1,mm6 ; mm1=data4
psubw mm5,mm0 ; mm5=data6
paddw mm7,mm6 ; mm7=data0
paddw mm4,mm0 ; mm4=data2
movq MMWORD [MMBLOCK(4,0,edx,SIZEOF_DCTELEM)], mm1
movq MMWORD [MMBLOCK(6,0,edx,SIZEOF_DCTELEM)], mm5
movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)], mm7
movq MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)], mm4
; -- Odd part
movq mm6, MMWORD [wk(0)] ; mm6=tmp6
movq mm0, MMWORD [wk(1)] ; mm0=tmp7
paddw mm2,mm3 ; mm2=tmp10
paddw mm3,mm6 ; mm3=tmp11
paddw mm6,mm0 ; mm6=tmp12, mm0=tmp7
psllw mm2,PRE_MULTIPLY_SCALE_BITS
psllw mm6,PRE_MULTIPLY_SCALE_BITS
psllw mm3,PRE_MULTIPLY_SCALE_BITS
pmulhw mm3,[GOTOFF(ebx,PW_F0707)] ; mm3=z3
movq mm1,mm2 ; mm1=tmp10
psubw mm2,mm6
pmulhw mm2,[GOTOFF(ebx,PW_F0382)] ; mm2=z5
pmulhw mm1,[GOTOFF(ebx,PW_F0541)] ; mm1=MULTIPLY(tmp10,FIX_0_54119610)
pmulhw mm6,[GOTOFF(ebx,PW_F1306)] ; mm6=MULTIPLY(tmp12,FIX_1_30656296)
paddw mm1,mm2 ; mm1=z2
paddw mm6,mm2 ; mm6=z4
movq mm5,mm0
psubw mm0,mm3 ; mm0=z13
paddw mm5,mm3 ; mm5=z11
movq mm7,mm0
movq mm4,mm5
psubw mm0,mm1 ; mm0=data3
psubw mm5,mm6 ; mm5=data7
paddw mm7,mm1 ; mm7=data5
paddw mm4,mm6 ; mm4=data1
movq MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)], mm0
movq MMWORD [MMBLOCK(7,0,edx,SIZEOF_DCTELEM)], mm5
movq MMWORD [MMBLOCK(5,0,edx,SIZEOF_DCTELEM)], mm7
movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)], mm4
add edx, byte 4*SIZEOF_DCTELEM
dec ecx
jnz near .columnloop
emms ; empty MMX 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
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