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-rw-r--r--common/jpeg/simd/jfmmxfst.asm394
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diff --git a/common/jpeg/simd/jfmmxfst.asm b/common/jpeg/simd/jfmmxfst.asm
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+;
+; jfmmxfst.asm - fast integer FDCT (MMX)
+;
+; 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 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 "simd/jsimdext.inc"
+%include "simd/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
+
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