; ; jfdctfst.asm - fast integer FDCT (64-bit SSE2) ; ; Copyright 2009 Pierre Ossman for Cendio AB ; Copyright 2009 D. R. Commander ; ; 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 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_sse2) EXTN(jconst_fdct_ifast_sse2): PW_F0707 times 8 dw F_0_707 << CONST_SHIFT PW_F0382 times 8 dw F_0_382 << CONST_SHIFT PW_F0541 times 8 dw F_0_541 << CONST_SHIFT PW_F1306 times 8 dw F_1_306 << CONST_SHIFT alignz 16 ; -------------------------------------------------------------------------- SECTION SEG_TEXT BITS 64 ; ; Perform the forward DCT on one block of samples. ; ; GLOBAL(void) ; jsimd_fdct_ifast_sse2 (DCTELEM * data) ; ; r10 = DCTELEM * data %define wk(i) rbp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM] %define WK_NUM 2 align 16 global EXTN(jsimd_fdct_ifast_sse2) EXTN(jsimd_fdct_ifast_sse2): push rbp mov rax,rsp ; rax = original rbp sub rsp, byte 4 and rsp, byte (-SIZEOF_XMMWORD) ; align to 128 bits mov [rsp],rax mov rbp,rsp ; rbp = aligned rbp lea rsp, [wk(0)] collect_args ; ---- Pass 1: process rows. mov rdx, r10 ; (DCTELEM *) movdqa xmm0, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_DCTELEM)] movdqa xmm1, XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_DCTELEM)] movdqa xmm2, XMMWORD [XMMBLOCK(2,0,rdx,SIZEOF_DCTELEM)] movdqa xmm3, XMMWORD [XMMBLOCK(3,0,rdx,SIZEOF_DCTELEM)] ; xmm0=(00 01 02 03 04 05 06 07), xmm2=(20 21 22 23 24 25 26 27) ; xmm1=(10 11 12 13 14 15 16 17), xmm3=(30 31 32 33 34 35 36 37) movdqa xmm4,xmm0 ; transpose coefficients(phase 1) punpcklwd xmm0,xmm1 ; xmm0=(00 10 01 11 02 12 03 13) punpckhwd xmm4,xmm1 ; xmm4=(04 14 05 15 06 16 07 17) movdqa xmm5,xmm2 ; transpose coefficients(phase 1) punpcklwd xmm2,xmm3 ; xmm2=(20 30 21 31 22 32 23 33) punpckhwd xmm5,xmm3 ; xmm5=(24 34 25 35 26 36 27 37) movdqa xmm6, XMMWORD [XMMBLOCK(4,0,rdx,SIZEOF_DCTELEM)] movdqa xmm7, XMMWORD [XMMBLOCK(5,0,rdx,SIZEOF_DCTELEM)] movdqa xmm1, XMMWORD [XMMBLOCK(6,0,rdx,SIZEOF_DCTELEM)] movdqa xmm3, XMMWORD [XMMBLOCK(7,0,rdx,SIZEOF_DCTELEM)] ; xmm6=( 4 12 20 28 36 44 52 60), xmm1=( 6 14 22 30 38 46 54 62) ; xmm7=( 5 13 21 29 37 45 53 61), xmm3=( 7 15 23 31 39 47 55 63) movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=(20 30 21 31 22 32 23 33) movdqa XMMWORD [wk(1)], xmm5 ; wk(1)=(24 34 25 35 26 36 27 37) movdqa xmm2,xmm6 ; transpose coefficients(phase 1) punpcklwd xmm6,xmm7 ; xmm6=(40 50 41 51 42 52 43 53) punpckhwd xmm2,xmm7 ; xmm2=(44 54 45 55 46 56 47 57) movdqa xmm5,xmm1 ; transpose coefficients(phase 1) punpcklwd xmm1,xmm3 ; xmm1=(60 70 61 71 62 72 63 73) punpckhwd xmm5,xmm3 ; xmm5=(64 74 65 75 66 76 67 77) movdqa xmm7,xmm6 ; transpose coefficients(phase 2) punpckldq xmm6,xmm1 ; xmm6=(40 50 60 70 41 51 61 71) punpckhdq xmm7,xmm1 ; xmm7=(42 52 62 72 43 53 63 73) movdqa xmm3,xmm2 ; transpose coefficients(phase 2) punpckldq xmm2,xmm5 ; xmm2=(44 54 64 74 45 55 65 75) punpckhdq xmm3,xmm5 ; xmm3=(46 56 66 76 47 57 67 77) movdqa xmm1, XMMWORD [wk(0)] ; xmm1=(20 30 21 31 22 32 23 33) movdqa xmm5, XMMWORD [wk(1)] ; xmm5=(24 34 25 35 26 36 27 37) movdqa XMMWORD [wk(0)], xmm7 ; wk(0)=(42 52 62 72 43 53 63 73) movdqa XMMWORD [wk(1)], xmm2 ; wk(1)=(44 54 64 74 45 55 65 75) movdqa xmm7,xmm0 ; transpose coefficients(phase 2) punpckldq xmm0,xmm1 ; xmm0=(00 10 20 30 01 11 21 31) punpckhdq xmm7,xmm1 ; xmm7=(02 12 22 32 03 13 23 33) movdqa xmm2,xmm4 ; transpose coefficients(phase 2) punpckldq xmm4,xmm5 ; xmm4=(04 14 24 34 05 15 25 35) punpckhdq xmm2,xmm5 ; xmm2=(06 16 26 36 07 17 27 37) movdqa xmm1,xmm0 ; transpose coefficients(phase 3) punpcklqdq xmm0,xmm6 ; xmm0=(00 10 20 30 40 50 60 70)=data0 punpckhqdq xmm1,xmm6 ; xmm1=(01 11 21 31 41 51 61 71)=data1 movdqa xmm5,xmm2 ; transpose coefficients(phase 3) punpcklqdq xmm2,xmm3 ; xmm2=(06 16 26 36 46 56 66 76)=data6 punpckhqdq xmm5,xmm3 ; xmm5=(07 17 27 37 47 57 67 77)=data7 movdqa xmm6,xmm1 movdqa xmm3,xmm0 psubw xmm1,xmm2 ; xmm1=data1-data6=tmp6 psubw xmm0,xmm5 ; xmm0=data0-data7=tmp7 paddw xmm6,xmm2 ; xmm6=data1+data6=tmp1 paddw xmm3,xmm5 ; xmm3=data0+data7=tmp0 movdqa xmm2, XMMWORD [wk(0)] ; xmm2=(42 52 62 72 43 53 63 73) movdqa xmm5, XMMWORD [wk(1)] ; xmm5=(44 54 64 74 45 55 65 75) movdqa XMMWORD [wk(0)], xmm1 ; wk(0)=tmp6 movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=tmp7 movdqa xmm1,xmm7 ; transpose coefficients(phase 3) punpcklqdq xmm7,xmm2 ; xmm7=(02 12 22 32 42 52 62 72)=data2 punpckhqdq xmm1,xmm2 ; xmm1=(03 13 23 33 43 53 63 73)=data3 movdqa xmm0,xmm4 ; transpose coefficients(phase 3) punpcklqdq xmm4,xmm5 ; xmm4=(04 14 24 34 44 54 64 74)=data4 punpckhqdq xmm0,xmm5 ; xmm0=(05 15 25 35 45 55 65 75)=data5 movdqa xmm2,xmm1 movdqa xmm5,xmm7 paddw xmm1,xmm4 ; xmm1=data3+data4=tmp3 paddw xmm7,xmm0 ; xmm7=data2+data5=tmp2 psubw xmm2,xmm4 ; xmm2=data3-data4=tmp4 psubw xmm5,xmm0 ; xmm5=data2-data5=tmp5 ; -- Even part movdqa xmm4,xmm3 movdqa xmm0,xmm6 psubw xmm3,xmm1 ; xmm3=tmp13 psubw xmm6,xmm7 ; xmm6=tmp12 paddw xmm4,xmm1 ; xmm4=tmp10 paddw xmm0,xmm7 ; xmm0=tmp11 paddw xmm6,xmm3 psllw xmm6,PRE_MULTIPLY_SCALE_BITS pmulhw xmm6,[rel PW_F0707] ; xmm6=z1 movdqa xmm1,xmm4 movdqa xmm7,xmm3 psubw xmm4,xmm0 ; xmm4=data4 psubw xmm3,xmm6 ; xmm3=data6 paddw xmm1,xmm0 ; xmm1=data0 paddw xmm7,xmm6 ; xmm7=data2 movdqa xmm0, XMMWORD [wk(0)] ; xmm0=tmp6 movdqa xmm6, XMMWORD [wk(1)] ; xmm6=tmp7 movdqa XMMWORD [wk(0)], xmm4 ; wk(0)=data4 movdqa XMMWORD [wk(1)], xmm3 ; wk(1)=data6 ; -- Odd part paddw xmm2,xmm5 ; xmm2=tmp10 paddw xmm5,xmm0 ; xmm5=tmp11 paddw xmm0,xmm6 ; xmm0=tmp12, xmm6=tmp7 psllw xmm2,PRE_MULTIPLY_SCALE_BITS psllw xmm0,PRE_MULTIPLY_SCALE_BITS psllw xmm5,PRE_MULTIPLY_SCALE_BITS pmulhw xmm5,[rel PW_F0707] ; xmm5=z3 movdqa xmm4,xmm2 ; xmm4=tmp10 psubw xmm2,xmm0 pmulhw xmm2,[rel PW_F0382] ; xmm2=z5 pmulhw xmm4,[rel PW_F0541] ; xmm4=MULTIPLY(tmp10,FIX_0_541196) pmulhw xmm0,[rel PW_F1306] ; xmm0=MULTIPLY(tmp12,FIX_1_306562) paddw xmm4,xmm2 ; xmm4=z2 paddw xmm0,xmm2 ; xmm0=z4 movdqa xmm3,xmm6 psubw xmm6,xmm5 ; xmm6=z13 paddw xmm3,xmm5 ; xmm3=z11 movdqa xmm2,xmm6 movdqa xmm5,xmm3 psubw xmm6,xmm4 ; xmm6=data3 psubw xmm3,xmm0 ; xmm3=data7 paddw xmm2,xmm4 ; xmm2=data5 paddw xmm5,xmm0 ; xmm5=data1 ; ---- Pass 2: process columns. ; xmm1=(00 10 20 30 40 50 60 70), xmm7=(02 12 22 32 42 52 62 72) ; xmm5=(01 11 21 31 41 51 61 71), xmm6=(03 13 23 33 43 53 63 73) movdqa xmm4,xmm1 ; transpose coefficients(phase 1) punpcklwd xmm1,xmm5 ; xmm1=(00 01 10 11 20 21 30 31) punpckhwd xmm4,xmm5 ; xmm4=(40 41 50 51 60 61 70 71) movdqa xmm0,xmm7 ; transpose coefficients(phase 1) punpcklwd xmm7,xmm6 ; xmm7=(02 03 12 13 22 23 32 33) punpckhwd xmm0,xmm6 ; xmm0=(42 43 52 53 62 63 72 73) movdqa xmm5, XMMWORD [wk(0)] ; xmm5=col4 movdqa xmm6, XMMWORD [wk(1)] ; xmm6=col6 ; xmm5=(04 14 24 34 44 54 64 74), xmm6=(06 16 26 36 46 56 66 76) ; xmm2=(05 15 25 35 45 55 65 75), xmm3=(07 17 27 37 47 57 67 77) movdqa XMMWORD [wk(0)], xmm7 ; wk(0)=(02 03 12 13 22 23 32 33) movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=(42 43 52 53 62 63 72 73) movdqa xmm7,xmm5 ; transpose coefficients(phase 1) punpcklwd xmm5,xmm2 ; xmm5=(04 05 14 15 24 25 34 35) punpckhwd xmm7,xmm2 ; xmm7=(44 45 54 55 64 65 74 75) movdqa xmm0,xmm6 ; transpose coefficients(phase 1) punpcklwd xmm6,xmm3 ; xmm6=(06 07 16 17 26 27 36 37) punpckhwd xmm0,xmm3 ; xmm0=(46 47 56 57 66 67 76 77) movdqa xmm2,xmm5 ; transpose coefficients(phase 2) punpckldq xmm5,xmm6 ; xmm5=(04 05 06 07 14 15 16 17) punpckhdq xmm2,xmm6 ; xmm2=(24 25 26 27 34 35 36 37) movdqa xmm3,xmm7 ; transpose coefficients(phase 2) punpckldq xmm7,xmm0 ; xmm7=(44 45 46 47 54 55 56 57) punpckhdq xmm3,xmm0 ; xmm3=(64 65 66 67 74 75 76 77) movdqa xmm6, XMMWORD [wk(0)] ; xmm6=(02 03 12 13 22 23 32 33) movdqa xmm0, XMMWORD [wk(1)] ; xmm0=(42 43 52 53 62 63 72 73) movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=(24 25 26 27 34 35 36 37) movdqa XMMWORD [wk(1)], xmm7 ; wk(1)=(44 45 46 47 54 55 56 57) movdqa xmm2,xmm1 ; transpose coefficients(phase 2) punpckldq xmm1,xmm6 ; xmm1=(00 01 02 03 10 11 12 13) punpckhdq xmm2,xmm6 ; xmm2=(20 21 22 23 30 31 32 33) movdqa xmm7,xmm4 ; transpose coefficients(phase 2) punpckldq xmm4,xmm0 ; xmm4=(40 41 42 43 50 51 52 53) punpckhdq xmm7,xmm0 ; xmm7=(60 61 62 63 70 71 72 73) movdqa xmm6,xmm1 ; transpose coefficients(phase 3) punpcklqdq xmm1,xmm5 ; xmm1=(00 01 02 03 04 05 06 07)=data0 punpckhqdq xmm6,xmm5 ; xmm6=(10 11 12 13 14 15 16 17)=data1 movdqa xmm0,xmm7 ; transpose coefficients(phase 3) punpcklqdq xmm7,xmm3 ; xmm7=(60 61 62 63 64 65 66 67)=data6 punpckhqdq xmm0,xmm3 ; xmm0=(70 71 72 73 74 75 76 77)=data7 movdqa xmm5,xmm6 movdqa xmm3,xmm1 psubw xmm6,xmm7 ; xmm6=data1-data6=tmp6 psubw xmm1,xmm0 ; xmm1=data0-data7=tmp7 paddw xmm5,xmm7 ; xmm5=data1+data6=tmp1 paddw xmm3,xmm0 ; xmm3=data0+data7=tmp0 movdqa xmm7, XMMWORD [wk(0)] ; xmm7=(24 25 26 27 34 35 36 37) movdqa xmm0, XMMWORD [wk(1)] ; xmm0=(44 45 46 47 54 55 56 57) movdqa XMMWORD [wk(0)], xmm6 ; wk(0)=tmp6 movdqa XMMWORD [wk(1)], xmm1 ; wk(1)=tmp7 movdqa xmm6,xmm2 ; transpose coefficients(phase 3) punpcklqdq xmm2,xmm7 ; xmm2=(20 21 22 23 24 25 26 27)=data2 punpckhqdq xmm6,xmm7 ; xmm6=(30 31 32 33 34 35 36 37)=data3 movdqa xmm1,xmm4 ; transpose coefficients(phase 3) punpcklqdq xmm4,xmm0 ; xmm4=(40 41 42 43 44 45 46 47)=data4 punpckhqdq xmm1,xmm0 ; xmm1=(50 51 52 53 54 55 56 57)=data5 movdqa xmm7,xmm6 movdqa xmm0,xmm2 paddw xmm6,xmm4 ; xmm6=data3+data4=tmp3 paddw xmm2,xmm1 ; xmm2=data2+data5=tmp2 psubw xmm7,xmm4 ; xmm7=data3-data4=tmp4 psubw xmm0,xmm1 ; xmm0=data2-data5=tmp5 ; -- Even part movdqa xmm4,xmm3 movdqa xmm1,xmm5 psubw xmm3,xmm6 ; xmm3=tmp13 psubw xmm5,xmm2 ; xmm5=tmp12 paddw xmm4,xmm6 ; xmm4=tmp10 paddw xmm1,xmm2 ; xmm1=tmp11 paddw xmm5,xmm3 psllw xmm5,PRE_MULTIPLY_SCALE_BITS pmulhw xmm5,[rel PW_F0707] ; xmm5=z1 movdqa xmm6,xmm4 movdqa xmm2,xmm3 psubw xmm4,xmm1 ; xmm4=data4 psubw xmm3,xmm5 ; xmm3=data6 paddw xmm6,xmm1 ; xmm6=data0 paddw xmm2,xmm5 ; xmm2=data2 movdqa XMMWORD [XMMBLOCK(4,0,rdx,SIZEOF_DCTELEM)], xmm4 movdqa XMMWORD [XMMBLOCK(6,0,rdx,SIZEOF_DCTELEM)], xmm3 movdqa XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_DCTELEM)], xmm6 movdqa XMMWORD [XMMBLOCK(2,0,rdx,SIZEOF_DCTELEM)], xmm2 ; -- Odd part movdqa xmm1, XMMWORD [wk(0)] ; xmm1=tmp6 movdqa xmm5, XMMWORD [wk(1)] ; xmm5=tmp7 paddw xmm7,xmm0 ; xmm7=tmp10 paddw xmm0,xmm1 ; xmm0=tmp11 paddw xmm1,xmm5 ; xmm1=tmp12, xmm5=tmp7 psllw xmm7,PRE_MULTIPLY_SCALE_BITS psllw xmm1,PRE_MULTIPLY_SCALE_BITS psllw xmm0,PRE_MULTIPLY_SCALE_BITS pmulhw xmm0,[rel PW_F0707] ; xmm0=z3 movdqa xmm4,xmm7 ; xmm4=tmp10 psubw xmm7,xmm1 pmulhw xmm7,[rel PW_F0382] ; xmm7=z5 pmulhw xmm4,[rel PW_F0541] ; xmm4=MULTIPLY(tmp10,FIX_0_541196) pmulhw xmm1,[rel PW_F1306] ; xmm1=MULTIPLY(tmp12,FIX_1_306562) paddw xmm4,xmm7 ; xmm4=z2 paddw xmm1,xmm7 ; xmm1=z4 movdqa xmm3,xmm5 psubw xmm5,xmm0 ; xmm5=z13 paddw xmm3,xmm0 ; xmm3=z11 movdqa xmm6,xmm5 movdqa xmm2,xmm3 psubw xmm5,xmm4 ; xmm5=data3 psubw xmm3,xmm1 ; xmm3=data7 paddw xmm6,xmm4 ; xmm6=data5 paddw xmm2,xmm1 ; xmm2=data1 movdqa XMMWORD [XMMBLOCK(3,0,rdx,SIZEOF_DCTELEM)], xmm5 movdqa XMMWORD [XMMBLOCK(7,0,rdx,SIZEOF_DCTELEM)], xmm3 movdqa XMMWORD [XMMBLOCK(5,0,rdx,SIZEOF_DCTELEM)], xmm6 movdqa XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_DCTELEM)], xmm2 uncollect_args mov rsp,rbp ; rsp <- aligned rbp pop rsp ; rsp <- original rbp pop rbp ret ; For some reason, the OS X linker does not honor the request to align the ; segment unless we do this. align 16