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diff --git a/media/libjpeg/simd/i386/jidctred-mmx.asm b/media/libjpeg/simd/i386/jidctred-mmx.asm
new file mode 100644
index 0000000000..e2307e1cb6
--- /dev/null
+++ b/media/libjpeg/simd/i386/jidctred-mmx.asm
@@ -0,0 +1,704 @@
+;
+; jidctred.asm - reduced-size IDCT (MMX)
+;
+; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
+; Copyright (C) 2016, 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),
+; 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 inverse-DCT routines that produce reduced-size
+; output: either 4x4 or 2x2 pixels from an 8x8 DCT block.
+; The following code is based directly on the IJG's original jidctred.c;
+; see the jidctred.c for more details.
+
+%include "jsimdext.inc"
+%include "jdct.inc"
+
+; --------------------------------------------------------------------------
+
+%define CONST_BITS 13
+%define PASS1_BITS 2
+
+%define DESCALE_P1_4 (CONST_BITS - PASS1_BITS + 1)
+%define DESCALE_P2_4 (CONST_BITS + PASS1_BITS + 3 + 1)
+%define DESCALE_P1_2 (CONST_BITS - PASS1_BITS + 2)
+%define DESCALE_P2_2 (CONST_BITS + PASS1_BITS + 3 + 2)
+
+%if CONST_BITS == 13
+F_0_211 equ 1730 ; FIX(0.211164243)
+F_0_509 equ 4176 ; FIX(0.509795579)
+F_0_601 equ 4926 ; FIX(0.601344887)
+F_0_720 equ 5906 ; FIX(0.720959822)
+F_0_765 equ 6270 ; FIX(0.765366865)
+F_0_850 equ 6967 ; FIX(0.850430095)
+F_0_899 equ 7373 ; FIX(0.899976223)
+F_1_061 equ 8697 ; FIX(1.061594337)
+F_1_272 equ 10426 ; FIX(1.272758580)
+F_1_451 equ 11893 ; FIX(1.451774981)
+F_1_847 equ 15137 ; FIX(1.847759065)
+F_2_172 equ 17799 ; FIX(2.172734803)
+F_2_562 equ 20995 ; FIX(2.562915447)
+F_3_624 equ 29692 ; FIX(3.624509785)
+%else
+; NASM cannot do compile-time arithmetic on floating-point constants.
+%define DESCALE(x, n) (((x) + (1 << ((n) - 1))) >> (n))
+F_0_211 equ DESCALE( 226735879, 30 - CONST_BITS) ; FIX(0.211164243)
+F_0_509 equ DESCALE( 547388834, 30 - CONST_BITS) ; FIX(0.509795579)
+F_0_601 equ DESCALE( 645689155, 30 - CONST_BITS) ; FIX(0.601344887)
+F_0_720 equ DESCALE( 774124714, 30 - CONST_BITS) ; FIX(0.720959822)
+F_0_765 equ DESCALE( 821806413, 30 - CONST_BITS) ; FIX(0.765366865)
+F_0_850 equ DESCALE( 913142361, 30 - CONST_BITS) ; FIX(0.850430095)
+F_0_899 equ DESCALE( 966342111, 30 - CONST_BITS) ; FIX(0.899976223)
+F_1_061 equ DESCALE(1139878239, 30 - CONST_BITS) ; FIX(1.061594337)
+F_1_272 equ DESCALE(1366614119, 30 - CONST_BITS) ; FIX(1.272758580)
+F_1_451 equ DESCALE(1558831516, 30 - CONST_BITS) ; FIX(1.451774981)
+F_1_847 equ DESCALE(1984016188, 30 - CONST_BITS) ; FIX(1.847759065)
+F_2_172 equ DESCALE(2332956230, 30 - CONST_BITS) ; FIX(2.172734803)
+F_2_562 equ DESCALE(2751909506, 30 - CONST_BITS) ; FIX(2.562915447)
+F_3_624 equ DESCALE(3891787747, 30 - CONST_BITS) ; FIX(3.624509785)
+%endif
+
+; --------------------------------------------------------------------------
+ SECTION SEG_CONST
+
+ alignz 32
+ GLOBAL_DATA(jconst_idct_red_mmx)
+
+EXTN(jconst_idct_red_mmx):
+
+PW_F184_MF076 times 2 dw F_1_847, -F_0_765
+PW_F256_F089 times 2 dw F_2_562, F_0_899
+PW_F106_MF217 times 2 dw F_1_061, -F_2_172
+PW_MF060_MF050 times 2 dw -F_0_601, -F_0_509
+PW_F145_MF021 times 2 dw F_1_451, -F_0_211
+PW_F362_MF127 times 2 dw F_3_624, -F_1_272
+PW_F085_MF072 times 2 dw F_0_850, -F_0_720
+PD_DESCALE_P1_4 times 2 dd 1 << (DESCALE_P1_4 - 1)
+PD_DESCALE_P2_4 times 2 dd 1 << (DESCALE_P2_4 - 1)
+PD_DESCALE_P1_2 times 2 dd 1 << (DESCALE_P1_2 - 1)
+PD_DESCALE_P2_2 times 2 dd 1 << (DESCALE_P2_2 - 1)
+PB_CENTERJSAMP times 8 db CENTERJSAMPLE
+
+ alignz 32
+
+; --------------------------------------------------------------------------
+ SECTION SEG_TEXT
+ BITS 32
+;
+; Perform dequantization and inverse DCT on one block of coefficients,
+; producing a reduced-size 4x4 output block.
+;
+; GLOBAL(void)
+; jsimd_idct_4x4_mmx(void *dct_table, JCOEFPTR coef_block,
+; JSAMPARRAY output_buf, JDIMENSION output_col)
+;
+
+%define dct_table(b) (b) + 8 ; void *dct_table
+%define coef_block(b) (b) + 12 ; JCOEFPTR coef_block
+%define output_buf(b) (b) + 16 ; JSAMPARRAY output_buf
+%define output_col(b) (b) + 20 ; JDIMENSION output_col
+
+%define original_ebp ebp + 0
+%define wk(i) ebp - (WK_NUM - (i)) * SIZEOF_MMWORD
+ ; mmword wk[WK_NUM]
+%define WK_NUM 2
+%define workspace wk(0) - DCTSIZE2 * SIZEOF_JCOEF
+ ; JCOEF workspace[DCTSIZE2]
+
+ align 32
+ GLOBAL_FUNCTION(jsimd_idct_4x4_mmx)
+
+EXTN(jsimd_idct_4x4_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, [workspace]
+ pushpic ebx
+; push ecx ; need not be preserved
+; push edx ; need not be preserved
+ push esi
+ push edi
+
+ get_GOT ebx ; get GOT address
+
+ ; ---- Pass 1: process columns from input, store into work array.
+
+; mov eax, [original_ebp]
+ mov edx, POINTER [dct_table(eax)] ; quantptr
+ mov esi, JCOEFPTR [coef_block(eax)] ; inptr
+ lea edi, [workspace] ; JCOEF *wsptr
+ mov ecx, DCTSIZE/4 ; ctr
+ alignx 16, 7
+.columnloop:
+%ifndef NO_ZERO_COLUMN_TEST_4X4_MMX
+ mov eax, dword [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
+ or eax, dword [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
+ jnz short .columnDCT
+
+ movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
+ movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
+ por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
+ por mm1, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
+ por mm0, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
+ por mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
+ por mm0, mm1
+ packsswb mm0, mm0
+ movd eax, mm0
+ test eax, eax
+ jnz short .columnDCT
+
+ ; -- AC terms all zero
+
+ movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
+ pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
+
+ psllw mm0, PASS1_BITS
+
+ movq mm2, mm0 ; mm0=in0=(00 01 02 03)
+ punpcklwd mm0, mm0 ; mm0=(00 00 01 01)
+ punpckhwd mm2, mm2 ; mm2=(02 02 03 03)
+
+ movq mm1, mm0
+ punpckldq mm0, mm0 ; mm0=(00 00 00 00)
+ punpckhdq mm1, mm1 ; mm1=(01 01 01 01)
+ movq mm3, mm2
+ punpckldq mm2, mm2 ; mm2=(02 02 02 02)
+ punpckhdq mm3, mm3 ; mm3=(03 03 03 03)
+
+ movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm0
+ movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm1
+ movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm2
+ movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm3
+ jmp near .nextcolumn
+ alignx 16, 7
+%endif
+.columnDCT:
+
+ ; -- Odd part
+
+ movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
+ movq mm1, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
+ pmullw mm0, MMWORD [MMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
+ pmullw mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
+ movq mm2, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
+ movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
+ pmullw mm2, MMWORD [MMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
+ pmullw mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
+
+ movq mm4, mm0
+ movq mm5, mm0
+ punpcklwd mm4, mm1
+ punpckhwd mm5, mm1
+ movq mm0, mm4
+ movq mm1, mm5
+ pmaddwd mm4, [GOTOFF(ebx,PW_F256_F089)] ; mm4=(tmp2L)
+ pmaddwd mm5, [GOTOFF(ebx,PW_F256_F089)] ; mm5=(tmp2H)
+ pmaddwd mm0, [GOTOFF(ebx,PW_F106_MF217)] ; mm0=(tmp0L)
+ pmaddwd mm1, [GOTOFF(ebx,PW_F106_MF217)] ; mm1=(tmp0H)
+
+ movq mm6, mm2
+ movq mm7, mm2
+ punpcklwd mm6, mm3
+ punpckhwd mm7, mm3
+ movq mm2, mm6
+ movq mm3, mm7
+ pmaddwd mm6, [GOTOFF(ebx,PW_MF060_MF050)] ; mm6=(tmp2L)
+ pmaddwd mm7, [GOTOFF(ebx,PW_MF060_MF050)] ; mm7=(tmp2H)
+ pmaddwd mm2, [GOTOFF(ebx,PW_F145_MF021)] ; mm2=(tmp0L)
+ pmaddwd mm3, [GOTOFF(ebx,PW_F145_MF021)] ; mm3=(tmp0H)
+
+ paddd mm6, mm4 ; mm6=tmp2L
+ paddd mm7, mm5 ; mm7=tmp2H
+ paddd mm2, mm0 ; mm2=tmp0L
+ paddd mm3, mm1 ; mm3=tmp0H
+
+ movq MMWORD [wk(0)], mm2 ; wk(0)=tmp0L
+ movq MMWORD [wk(1)], mm3 ; wk(1)=tmp0H
+
+ ; -- Even part
+
+ movq mm4, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
+ movq mm5, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
+ movq mm0, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
+ pmullw mm4, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
+ pmullw mm5, MMWORD [MMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
+ pmullw mm0, MMWORD [MMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
+
+ pxor mm1, mm1
+ pxor mm2, mm2
+ punpcklwd mm1, mm4 ; mm1=tmp0L
+ punpckhwd mm2, mm4 ; mm2=tmp0H
+ psrad mm1, (16-CONST_BITS-1) ; psrad mm1,16 & pslld mm1,CONST_BITS+1
+ psrad mm2, (16-CONST_BITS-1) ; psrad mm2,16 & pslld mm2,CONST_BITS+1
+
+ movq mm3, mm5 ; mm5=in2=z2
+ punpcklwd mm5, mm0 ; mm0=in6=z3
+ punpckhwd mm3, mm0
+ pmaddwd mm5, [GOTOFF(ebx,PW_F184_MF076)] ; mm5=tmp2L
+ pmaddwd mm3, [GOTOFF(ebx,PW_F184_MF076)] ; mm3=tmp2H
+
+ movq mm4, mm1
+ movq mm0, mm2
+ paddd mm1, mm5 ; mm1=tmp10L
+ paddd mm2, mm3 ; mm2=tmp10H
+ psubd mm4, mm5 ; mm4=tmp12L
+ psubd mm0, mm3 ; mm0=tmp12H
+
+ ; -- Final output stage
+
+ movq mm5, mm1
+ movq mm3, mm2
+ paddd mm1, mm6 ; mm1=data0L
+ paddd mm2, mm7 ; mm2=data0H
+ psubd mm5, mm6 ; mm5=data3L
+ psubd mm3, mm7 ; mm3=data3H
+
+ movq mm6, [GOTOFF(ebx,PD_DESCALE_P1_4)] ; mm6=[PD_DESCALE_P1_4]
+
+ paddd mm1, mm6
+ paddd mm2, mm6
+ psrad mm1, DESCALE_P1_4
+ psrad mm2, DESCALE_P1_4
+ paddd mm5, mm6
+ paddd mm3, mm6
+ psrad mm5, DESCALE_P1_4
+ psrad mm3, DESCALE_P1_4
+
+ packssdw mm1, mm2 ; mm1=data0=(00 01 02 03)
+ packssdw mm5, mm3 ; mm5=data3=(30 31 32 33)
+
+ movq mm7, MMWORD [wk(0)] ; mm7=tmp0L
+ movq mm6, MMWORD [wk(1)] ; mm6=tmp0H
+
+ movq mm2, mm4
+ movq mm3, mm0
+ paddd mm4, mm7 ; mm4=data1L
+ paddd mm0, mm6 ; mm0=data1H
+ psubd mm2, mm7 ; mm2=data2L
+ psubd mm3, mm6 ; mm3=data2H
+
+ movq mm7, [GOTOFF(ebx,PD_DESCALE_P1_4)] ; mm7=[PD_DESCALE_P1_4]
+
+ paddd mm4, mm7
+ paddd mm0, mm7
+ psrad mm4, DESCALE_P1_4
+ psrad mm0, DESCALE_P1_4
+ paddd mm2, mm7
+ paddd mm3, mm7
+ psrad mm2, DESCALE_P1_4
+ psrad mm3, DESCALE_P1_4
+
+ packssdw mm4, mm0 ; mm4=data1=(10 11 12 13)
+ packssdw mm2, mm3 ; mm2=data2=(20 21 22 23)
+
+ movq mm6, mm1 ; transpose coefficients(phase 1)
+ punpcklwd mm1, mm4 ; mm1=(00 10 01 11)
+ punpckhwd mm6, mm4 ; mm6=(02 12 03 13)
+ movq mm7, mm2 ; transpose coefficients(phase 1)
+ punpcklwd mm2, mm5 ; mm2=(20 30 21 31)
+ punpckhwd mm7, mm5 ; mm7=(22 32 23 33)
+
+ movq mm0, mm1 ; transpose coefficients(phase 2)
+ punpckldq mm1, mm2 ; mm1=(00 10 20 30)
+ punpckhdq mm0, mm2 ; mm0=(01 11 21 31)
+ movq mm3, mm6 ; transpose coefficients(phase 2)
+ punpckldq mm6, mm7 ; mm6=(02 12 22 32)
+ punpckhdq mm3, mm7 ; mm3=(03 13 23 33)
+
+ movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm1
+ movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm0
+ movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm6
+ movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm3
+
+.nextcolumn:
+ add esi, byte 4*SIZEOF_JCOEF ; coef_block
+ add edx, byte 4*SIZEOF_ISLOW_MULT_TYPE ; quantptr
+ add edi, byte 4*DCTSIZE*SIZEOF_JCOEF ; wsptr
+ dec ecx ; ctr
+ jnz near .columnloop
+
+ ; ---- Pass 2: process rows from work array, store into output array.
+
+ mov eax, [original_ebp]
+ lea esi, [workspace] ; JCOEF *wsptr
+ mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
+ mov eax, JDIMENSION [output_col(eax)]
+
+ ; -- Odd part
+
+ movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
+ movq mm1, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
+ movq mm2, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
+ movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
+
+ movq mm4, mm0
+ movq mm5, mm0
+ punpcklwd mm4, mm1
+ punpckhwd mm5, mm1
+ movq mm0, mm4
+ movq mm1, mm5
+ pmaddwd mm4, [GOTOFF(ebx,PW_F256_F089)] ; mm4=(tmp2L)
+ pmaddwd mm5, [GOTOFF(ebx,PW_F256_F089)] ; mm5=(tmp2H)
+ pmaddwd mm0, [GOTOFF(ebx,PW_F106_MF217)] ; mm0=(tmp0L)
+ pmaddwd mm1, [GOTOFF(ebx,PW_F106_MF217)] ; mm1=(tmp0H)
+
+ movq mm6, mm2
+ movq mm7, mm2
+ punpcklwd mm6, mm3
+ punpckhwd mm7, mm3
+ movq mm2, mm6
+ movq mm3, mm7
+ pmaddwd mm6, [GOTOFF(ebx,PW_MF060_MF050)] ; mm6=(tmp2L)
+ pmaddwd mm7, [GOTOFF(ebx,PW_MF060_MF050)] ; mm7=(tmp2H)
+ pmaddwd mm2, [GOTOFF(ebx,PW_F145_MF021)] ; mm2=(tmp0L)
+ pmaddwd mm3, [GOTOFF(ebx,PW_F145_MF021)] ; mm3=(tmp0H)
+
+ paddd mm6, mm4 ; mm6=tmp2L
+ paddd mm7, mm5 ; mm7=tmp2H
+ paddd mm2, mm0 ; mm2=tmp0L
+ paddd mm3, mm1 ; mm3=tmp0H
+
+ movq MMWORD [wk(0)], mm2 ; wk(0)=tmp0L
+ movq MMWORD [wk(1)], mm3 ; wk(1)=tmp0H
+
+ ; -- Even part
+
+ movq mm4, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
+ movq mm5, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
+ movq mm0, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
+
+ pxor mm1, mm1
+ pxor mm2, mm2
+ punpcklwd mm1, mm4 ; mm1=tmp0L
+ punpckhwd mm2, mm4 ; mm2=tmp0H
+ psrad mm1, (16-CONST_BITS-1) ; psrad mm1,16 & pslld mm1,CONST_BITS+1
+ psrad mm2, (16-CONST_BITS-1) ; psrad mm2,16 & pslld mm2,CONST_BITS+1
+
+ movq mm3, mm5 ; mm5=in2=z2
+ punpcklwd mm5, mm0 ; mm0=in6=z3
+ punpckhwd mm3, mm0
+ pmaddwd mm5, [GOTOFF(ebx,PW_F184_MF076)] ; mm5=tmp2L
+ pmaddwd mm3, [GOTOFF(ebx,PW_F184_MF076)] ; mm3=tmp2H
+
+ movq mm4, mm1
+ movq mm0, mm2
+ paddd mm1, mm5 ; mm1=tmp10L
+ paddd mm2, mm3 ; mm2=tmp10H
+ psubd mm4, mm5 ; mm4=tmp12L
+ psubd mm0, mm3 ; mm0=tmp12H
+
+ ; -- Final output stage
+
+ movq mm5, mm1
+ movq mm3, mm2
+ paddd mm1, mm6 ; mm1=data0L
+ paddd mm2, mm7 ; mm2=data0H
+ psubd mm5, mm6 ; mm5=data3L
+ psubd mm3, mm7 ; mm3=data3H
+
+ movq mm6, [GOTOFF(ebx,PD_DESCALE_P2_4)] ; mm6=[PD_DESCALE_P2_4]
+
+ paddd mm1, mm6
+ paddd mm2, mm6
+ psrad mm1, DESCALE_P2_4
+ psrad mm2, DESCALE_P2_4
+ paddd mm5, mm6
+ paddd mm3, mm6
+ psrad mm5, DESCALE_P2_4
+ psrad mm3, DESCALE_P2_4
+
+ packssdw mm1, mm2 ; mm1=data0=(00 10 20 30)
+ packssdw mm5, mm3 ; mm5=data3=(03 13 23 33)
+
+ movq mm7, MMWORD [wk(0)] ; mm7=tmp0L
+ movq mm6, MMWORD [wk(1)] ; mm6=tmp0H
+
+ movq mm2, mm4
+ movq mm3, mm0
+ paddd mm4, mm7 ; mm4=data1L
+ paddd mm0, mm6 ; mm0=data1H
+ psubd mm2, mm7 ; mm2=data2L
+ psubd mm3, mm6 ; mm3=data2H
+
+ movq mm7, [GOTOFF(ebx,PD_DESCALE_P2_4)] ; mm7=[PD_DESCALE_P2_4]
+
+ paddd mm4, mm7
+ paddd mm0, mm7
+ psrad mm4, DESCALE_P2_4
+ psrad mm0, DESCALE_P2_4
+ paddd mm2, mm7
+ paddd mm3, mm7
+ psrad mm2, DESCALE_P2_4
+ psrad mm3, DESCALE_P2_4
+
+ packssdw mm4, mm0 ; mm4=data1=(01 11 21 31)
+ packssdw mm2, mm3 ; mm2=data2=(02 12 22 32)
+
+ movq mm6, [GOTOFF(ebx,PB_CENTERJSAMP)] ; mm6=[PB_CENTERJSAMP]
+
+ packsswb mm1, mm2 ; mm1=(00 10 20 30 02 12 22 32)
+ packsswb mm4, mm5 ; mm4=(01 11 21 31 03 13 23 33)
+ paddb mm1, mm6
+ paddb mm4, mm6
+
+ movq mm7, mm1 ; transpose coefficients(phase 1)
+ punpcklbw mm1, mm4 ; mm1=(00 01 10 11 20 21 30 31)
+ punpckhbw mm7, mm4 ; mm7=(02 03 12 13 22 23 32 33)
+
+ movq mm0, mm1 ; transpose coefficients(phase 2)
+ punpcklwd mm1, mm7 ; mm1=(00 01 02 03 10 11 12 13)
+ punpckhwd mm0, mm7 ; mm0=(20 21 22 23 30 31 32 33)
+
+ mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
+ mov esi, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
+ movd dword [edx+eax*SIZEOF_JSAMPLE], mm1
+ movd dword [esi+eax*SIZEOF_JSAMPLE], mm0
+
+ psrlq mm1, 4*BYTE_BIT
+ psrlq mm0, 4*BYTE_BIT
+
+ mov edx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
+ mov esi, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
+ movd dword [edx+eax*SIZEOF_JSAMPLE], mm1
+ movd dword [esi+eax*SIZEOF_JSAMPLE], mm0
+
+ emms ; empty MMX state
+
+ pop edi
+ pop esi
+; 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
+
+; --------------------------------------------------------------------------
+;
+; Perform dequantization and inverse DCT on one block of coefficients,
+; producing a reduced-size 2x2 output block.
+;
+; GLOBAL(void)
+; jsimd_idct_2x2_mmx(void *dct_table, JCOEFPTR coef_block,
+; JSAMPARRAY output_buf, JDIMENSION output_col)
+;
+
+%define dct_table(b) (b) + 8 ; void *dct_table
+%define coef_block(b) (b) + 12 ; JCOEFPTR coef_block
+%define output_buf(b) (b) + 16 ; JSAMPARRAY output_buf
+%define output_col(b) (b) + 20 ; JDIMENSION output_col
+
+ align 32
+ GLOBAL_FUNCTION(jsimd_idct_2x2_mmx)
+
+EXTN(jsimd_idct_2x2_mmx):
+ push ebp
+ mov ebp, esp
+ push ebx
+; push ecx ; need not be preserved
+; push edx ; need not be preserved
+ push esi
+ push edi
+
+ get_GOT ebx ; get GOT address
+
+ ; ---- Pass 1: process columns from input.
+
+ mov edx, POINTER [dct_table(ebp)] ; quantptr
+ mov esi, JCOEFPTR [coef_block(ebp)] ; inptr
+
+ ; | input: | result: |
+ ; | 00 01 ** 03 ** 05 ** 07 | |
+ ; | 10 11 ** 13 ** 15 ** 17 | |
+ ; | ** ** ** ** ** ** ** ** | |
+ ; | 30 31 ** 33 ** 35 ** 37 | A0 A1 A3 A5 A7 |
+ ; | ** ** ** ** ** ** ** ** | B0 B1 B3 B5 B7 |
+ ; | 50 51 ** 53 ** 55 ** 57 | |
+ ; | ** ** ** ** ** ** ** ** | |
+ ; | 70 71 ** 73 ** 75 ** 77 | |
+
+ ; -- Odd part
+
+ movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
+ movq mm1, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
+ pmullw mm0, MMWORD [MMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
+ pmullw mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
+ movq mm2, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
+ movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
+ pmullw mm2, MMWORD [MMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
+ pmullw mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
+
+ ; mm0=(10 11 ** 13), mm1=(30 31 ** 33)
+ ; mm2=(50 51 ** 53), mm3=(70 71 ** 73)
+
+ pcmpeqd mm7, mm7
+ pslld mm7, WORD_BIT ; mm7={0x0000 0xFFFF 0x0000 0xFFFF}
+
+ movq mm4, mm0 ; mm4=(10 11 ** 13)
+ movq mm5, mm2 ; mm5=(50 51 ** 53)
+ punpcklwd mm4, mm1 ; mm4=(10 30 11 31)
+ punpcklwd mm5, mm3 ; mm5=(50 70 51 71)
+ pmaddwd mm4, [GOTOFF(ebx,PW_F362_MF127)]
+ pmaddwd mm5, [GOTOFF(ebx,PW_F085_MF072)]
+
+ psrld mm0, WORD_BIT ; mm0=(11 -- 13 --)
+ pand mm1, mm7 ; mm1=(-- 31 -- 33)
+ psrld mm2, WORD_BIT ; mm2=(51 -- 53 --)
+ pand mm3, mm7 ; mm3=(-- 71 -- 73)
+ por mm0, mm1 ; mm0=(11 31 13 33)
+ por mm2, mm3 ; mm2=(51 71 53 73)
+ pmaddwd mm0, [GOTOFF(ebx,PW_F362_MF127)]
+ pmaddwd mm2, [GOTOFF(ebx,PW_F085_MF072)]
+
+ paddd mm4, mm5 ; mm4=tmp0[col0 col1]
+
+ movq mm6, MMWORD [MMBLOCK(1,1,esi,SIZEOF_JCOEF)]
+ movq mm1, MMWORD [MMBLOCK(3,1,esi,SIZEOF_JCOEF)]
+ pmullw mm6, MMWORD [MMBLOCK(1,1,edx,SIZEOF_ISLOW_MULT_TYPE)]
+ pmullw mm1, MMWORD [MMBLOCK(3,1,edx,SIZEOF_ISLOW_MULT_TYPE)]
+ movq mm3, MMWORD [MMBLOCK(5,1,esi,SIZEOF_JCOEF)]
+ movq mm5, MMWORD [MMBLOCK(7,1,esi,SIZEOF_JCOEF)]
+ pmullw mm3, MMWORD [MMBLOCK(5,1,edx,SIZEOF_ISLOW_MULT_TYPE)]
+ pmullw mm5, MMWORD [MMBLOCK(7,1,edx,SIZEOF_ISLOW_MULT_TYPE)]
+
+ ; mm6=(** 15 ** 17), mm1=(** 35 ** 37)
+ ; mm3=(** 55 ** 57), mm5=(** 75 ** 77)
+
+ psrld mm6, WORD_BIT ; mm6=(15 -- 17 --)
+ pand mm1, mm7 ; mm1=(-- 35 -- 37)
+ psrld mm3, WORD_BIT ; mm3=(55 -- 57 --)
+ pand mm5, mm7 ; mm5=(-- 75 -- 77)
+ por mm6, mm1 ; mm6=(15 35 17 37)
+ por mm3, mm5 ; mm3=(55 75 57 77)
+ pmaddwd mm6, [GOTOFF(ebx,PW_F362_MF127)]
+ pmaddwd mm3, [GOTOFF(ebx,PW_F085_MF072)]
+
+ paddd mm0, mm2 ; mm0=tmp0[col1 col3]
+ paddd mm6, mm3 ; mm6=tmp0[col5 col7]
+
+ ; -- Even part
+
+ movq mm1, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
+ movq mm5, MMWORD [MMBLOCK(0,1,esi,SIZEOF_JCOEF)]
+ pmullw mm1, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
+ pmullw mm5, MMWORD [MMBLOCK(0,1,edx,SIZEOF_ISLOW_MULT_TYPE)]
+
+ ; mm1=(00 01 ** 03), mm5=(** 05 ** 07)
+
+ movq mm2, mm1 ; mm2=(00 01 ** 03)
+ pslld mm1, WORD_BIT ; mm1=(-- 00 -- **)
+ psrad mm1, (WORD_BIT-CONST_BITS-2) ; mm1=tmp10[col0 ****]
+
+ pand mm2, mm7 ; mm2=(-- 01 -- 03)
+ pand mm5, mm7 ; mm5=(-- 05 -- 07)
+ psrad mm2, (WORD_BIT-CONST_BITS-2) ; mm2=tmp10[col1 col3]
+ psrad mm5, (WORD_BIT-CONST_BITS-2) ; mm5=tmp10[col5 col7]
+
+ ; -- Final output stage
+
+ movq mm3, mm1
+ paddd mm1, mm4 ; mm1=data0[col0 ****]=(A0 **)
+ psubd mm3, mm4 ; mm3=data1[col0 ****]=(B0 **)
+ punpckldq mm1, mm3 ; mm1=(A0 B0)
+
+ movq mm7, [GOTOFF(ebx,PD_DESCALE_P1_2)] ; mm7=[PD_DESCALE_P1_2]
+
+ movq mm4, mm2
+ movq mm3, mm5
+ paddd mm2, mm0 ; mm2=data0[col1 col3]=(A1 A3)
+ paddd mm5, mm6 ; mm5=data0[col5 col7]=(A5 A7)
+ psubd mm4, mm0 ; mm4=data1[col1 col3]=(B1 B3)
+ psubd mm3, mm6 ; mm3=data1[col5 col7]=(B5 B7)
+
+ paddd mm1, mm7
+ psrad mm1, DESCALE_P1_2
+
+ paddd mm2, mm7
+ paddd mm5, mm7
+ psrad mm2, DESCALE_P1_2
+ psrad mm5, DESCALE_P1_2
+ paddd mm4, mm7
+ paddd mm3, mm7
+ psrad mm4, DESCALE_P1_2
+ psrad mm3, DESCALE_P1_2
+
+ ; ---- Pass 2: process rows, store into output array.
+
+ mov edi, JSAMPARRAY [output_buf(ebp)] ; (JSAMPROW *)
+ mov eax, JDIMENSION [output_col(ebp)]
+
+ ; | input:| result:|
+ ; | A0 B0 | |
+ ; | A1 B1 | C0 C1 |
+ ; | A3 B3 | D0 D1 |
+ ; | A5 B5 | |
+ ; | A7 B7 | |
+
+ ; -- Odd part
+
+ packssdw mm2, mm4 ; mm2=(A1 A3 B1 B3)
+ packssdw mm5, mm3 ; mm5=(A5 A7 B5 B7)
+ pmaddwd mm2, [GOTOFF(ebx,PW_F362_MF127)]
+ pmaddwd mm5, [GOTOFF(ebx,PW_F085_MF072)]
+
+ paddd mm2, mm5 ; mm2=tmp0[row0 row1]
+
+ ; -- Even part
+
+ pslld mm1, (CONST_BITS+2) ; mm1=tmp10[row0 row1]
+
+ ; -- Final output stage
+
+ movq mm0, [GOTOFF(ebx,PD_DESCALE_P2_2)] ; mm0=[PD_DESCALE_P2_2]
+
+ movq mm6, mm1
+ paddd mm1, mm2 ; mm1=data0[row0 row1]=(C0 C1)
+ psubd mm6, mm2 ; mm6=data1[row0 row1]=(D0 D1)
+
+ paddd mm1, mm0
+ paddd mm6, mm0
+ psrad mm1, DESCALE_P2_2
+ psrad mm6, DESCALE_P2_2
+
+ movq mm7, mm1 ; transpose coefficients
+ punpckldq mm1, mm6 ; mm1=(C0 D0)
+ punpckhdq mm7, mm6 ; mm7=(C1 D1)
+
+ packssdw mm1, mm7 ; mm1=(C0 D0 C1 D1)
+ packsswb mm1, mm1 ; mm1=(C0 D0 C1 D1 C0 D0 C1 D1)
+ paddb mm1, [GOTOFF(ebx,PB_CENTERJSAMP)]
+
+ movd ecx, mm1
+ movd ebx, mm1 ; ebx=(C0 D0 C1 D1)
+ shr ecx, 2*BYTE_BIT ; ecx=(C1 D1 -- --)
+
+ mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
+ mov esi, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
+ mov word [edx+eax*SIZEOF_JSAMPLE], bx
+ mov word [esi+eax*SIZEOF_JSAMPLE], cx
+
+ emms ; empty MMX state
+
+ pop edi
+ pop esi
+; pop edx ; need not be preserved
+; pop ecx ; need not be preserved
+ pop ebx
+ 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
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