705 lines
27 KiB
NASM
705 lines
27 KiB
NASM
;
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; jidctred.asm - reduced-size IDCT (MMX)
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;
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; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
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; Copyright (C) 2016, D. R. Commander.
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;
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; Based on the x86 SIMD extension for IJG JPEG library
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; Copyright (C) 1999-2006, MIYASAKA Masaru.
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; For conditions of distribution and use, see copyright notice in jsimdext.inc
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;
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; This file should be assembled with NASM (Netwide Assembler),
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; can *not* be assembled with Microsoft's MASM or any compatible
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; assembler (including Borland's Turbo Assembler).
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; NASM is available from http://nasm.sourceforge.net/ or
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; http://sourceforge.net/project/showfiles.php?group_id=6208
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;
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; This file contains inverse-DCT routines that produce reduced-size
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; output: either 4x4 or 2x2 pixels from an 8x8 DCT block.
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; The following code is based directly on the IJG's original jidctred.c;
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; see the jidctred.c for more details.
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%include "jsimdext.inc"
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%include "jdct.inc"
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; --------------------------------------------------------------------------
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%define CONST_BITS 13
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%define PASS1_BITS 2
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%define DESCALE_P1_4 (CONST_BITS - PASS1_BITS + 1)
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%define DESCALE_P2_4 (CONST_BITS + PASS1_BITS + 3 + 1)
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%define DESCALE_P1_2 (CONST_BITS - PASS1_BITS + 2)
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%define DESCALE_P2_2 (CONST_BITS + PASS1_BITS + 3 + 2)
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%if CONST_BITS == 13
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F_0_211 equ 1730 ; FIX(0.211164243)
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F_0_509 equ 4176 ; FIX(0.509795579)
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F_0_601 equ 4926 ; FIX(0.601344887)
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F_0_720 equ 5906 ; FIX(0.720959822)
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F_0_765 equ 6270 ; FIX(0.765366865)
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F_0_850 equ 6967 ; FIX(0.850430095)
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F_0_899 equ 7373 ; FIX(0.899976223)
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F_1_061 equ 8697 ; FIX(1.061594337)
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F_1_272 equ 10426 ; FIX(1.272758580)
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F_1_451 equ 11893 ; FIX(1.451774981)
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F_1_847 equ 15137 ; FIX(1.847759065)
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F_2_172 equ 17799 ; FIX(2.172734803)
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F_2_562 equ 20995 ; FIX(2.562915447)
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F_3_624 equ 29692 ; FIX(3.624509785)
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%else
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; NASM cannot do compile-time arithmetic on floating-point constants.
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%define DESCALE(x, n) (((x) + (1 << ((n) - 1))) >> (n))
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F_0_211 equ DESCALE( 226735879, 30 - CONST_BITS) ; FIX(0.211164243)
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F_0_509 equ DESCALE( 547388834, 30 - CONST_BITS) ; FIX(0.509795579)
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F_0_601 equ DESCALE( 645689155, 30 - CONST_BITS) ; FIX(0.601344887)
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F_0_720 equ DESCALE( 774124714, 30 - CONST_BITS) ; FIX(0.720959822)
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F_0_765 equ DESCALE( 821806413, 30 - CONST_BITS) ; FIX(0.765366865)
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F_0_850 equ DESCALE( 913142361, 30 - CONST_BITS) ; FIX(0.850430095)
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F_0_899 equ DESCALE( 966342111, 30 - CONST_BITS) ; FIX(0.899976223)
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F_1_061 equ DESCALE(1139878239, 30 - CONST_BITS) ; FIX(1.061594337)
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F_1_272 equ DESCALE(1366614119, 30 - CONST_BITS) ; FIX(1.272758580)
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F_1_451 equ DESCALE(1558831516, 30 - CONST_BITS) ; FIX(1.451774981)
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F_1_847 equ DESCALE(1984016188, 30 - CONST_BITS) ; FIX(1.847759065)
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F_2_172 equ DESCALE(2332956230, 30 - CONST_BITS) ; FIX(2.172734803)
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F_2_562 equ DESCALE(2751909506, 30 - CONST_BITS) ; FIX(2.562915447)
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F_3_624 equ DESCALE(3891787747, 30 - CONST_BITS) ; FIX(3.624509785)
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%endif
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; --------------------------------------------------------------------------
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SECTION SEG_CONST
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alignz 32
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GLOBAL_DATA(jconst_idct_red_mmx)
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EXTN(jconst_idct_red_mmx):
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PW_F184_MF076 times 2 dw F_1_847, -F_0_765
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PW_F256_F089 times 2 dw F_2_562, F_0_899
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PW_F106_MF217 times 2 dw F_1_061, -F_2_172
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PW_MF060_MF050 times 2 dw -F_0_601, -F_0_509
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PW_F145_MF021 times 2 dw F_1_451, -F_0_211
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PW_F362_MF127 times 2 dw F_3_624, -F_1_272
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PW_F085_MF072 times 2 dw F_0_850, -F_0_720
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PD_DESCALE_P1_4 times 2 dd 1 << (DESCALE_P1_4 - 1)
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PD_DESCALE_P2_4 times 2 dd 1 << (DESCALE_P2_4 - 1)
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PD_DESCALE_P1_2 times 2 dd 1 << (DESCALE_P1_2 - 1)
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PD_DESCALE_P2_2 times 2 dd 1 << (DESCALE_P2_2 - 1)
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PB_CENTERJSAMP times 8 db CENTERJSAMPLE
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alignz 32
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; --------------------------------------------------------------------------
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SECTION SEG_TEXT
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BITS 32
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;
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; Perform dequantization and inverse DCT on one block of coefficients,
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; producing a reduced-size 4x4 output block.
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;
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; GLOBAL(void)
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; jsimd_idct_4x4_mmx(void *dct_table, JCOEFPTR coef_block,
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; JSAMPARRAY output_buf, JDIMENSION output_col)
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;
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%define dct_table(b) (b) + 8 ; void *dct_table
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%define coef_block(b) (b) + 12 ; JCOEFPTR coef_block
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%define output_buf(b) (b) + 16 ; JSAMPARRAY output_buf
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%define output_col(b) (b) + 20 ; JDIMENSION output_col
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%define original_ebp ebp + 0
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%define wk(i) ebp - (WK_NUM - (i)) * SIZEOF_MMWORD
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; mmword wk[WK_NUM]
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%define WK_NUM 2
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%define workspace wk(0) - DCTSIZE2 * SIZEOF_JCOEF
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; JCOEF workspace[DCTSIZE2]
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align 32
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GLOBAL_FUNCTION(jsimd_idct_4x4_mmx)
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EXTN(jsimd_idct_4x4_mmx):
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push ebp
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mov eax, esp ; eax = original ebp
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sub esp, byte 4
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and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits
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mov [esp], eax
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mov ebp, esp ; ebp = aligned ebp
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lea esp, [workspace]
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pushpic ebx
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; push ecx ; need not be preserved
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; push edx ; need not be preserved
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push esi
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push edi
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get_GOT ebx ; get GOT address
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; ---- Pass 1: process columns from input, store into work array.
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; mov eax, [original_ebp]
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mov edx, POINTER [dct_table(eax)] ; quantptr
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mov esi, JCOEFPTR [coef_block(eax)] ; inptr
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lea edi, [workspace] ; JCOEF *wsptr
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mov ecx, DCTSIZE/4 ; ctr
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alignx 16, 7
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.columnloop:
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%ifndef NO_ZERO_COLUMN_TEST_4X4_MMX
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mov eax, dword [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
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or eax, dword [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
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jnz short .columnDCT
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movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
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movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
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por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
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por mm1, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
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por mm0, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
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por mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
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por mm0, mm1
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packsswb mm0, mm0
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movd eax, mm0
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test eax, eax
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jnz short .columnDCT
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; -- AC terms all zero
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movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
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pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
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psllw mm0, PASS1_BITS
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movq mm2, mm0 ; mm0=in0=(00 01 02 03)
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punpcklwd mm0, mm0 ; mm0=(00 00 01 01)
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punpckhwd mm2, mm2 ; mm2=(02 02 03 03)
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movq mm1, mm0
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punpckldq mm0, mm0 ; mm0=(00 00 00 00)
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punpckhdq mm1, mm1 ; mm1=(01 01 01 01)
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movq mm3, mm2
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punpckldq mm2, mm2 ; mm2=(02 02 02 02)
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punpckhdq mm3, mm3 ; mm3=(03 03 03 03)
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movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm0
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movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm1
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movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm2
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movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm3
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jmp near .nextcolumn
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alignx 16, 7
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%endif
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.columnDCT:
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; -- Odd part
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movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
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movq mm1, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
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pmullw mm0, MMWORD [MMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
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pmullw mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
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movq mm2, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
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movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
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pmullw mm2, MMWORD [MMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
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pmullw mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
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movq mm4, mm0
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movq mm5, mm0
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punpcklwd mm4, mm1
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punpckhwd mm5, mm1
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movq mm0, mm4
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movq mm1, mm5
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pmaddwd mm4, [GOTOFF(ebx,PW_F256_F089)] ; mm4=(tmp2L)
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pmaddwd mm5, [GOTOFF(ebx,PW_F256_F089)] ; mm5=(tmp2H)
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pmaddwd mm0, [GOTOFF(ebx,PW_F106_MF217)] ; mm0=(tmp0L)
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pmaddwd mm1, [GOTOFF(ebx,PW_F106_MF217)] ; mm1=(tmp0H)
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movq mm6, mm2
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movq mm7, mm2
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punpcklwd mm6, mm3
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punpckhwd mm7, mm3
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movq mm2, mm6
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movq mm3, mm7
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pmaddwd mm6, [GOTOFF(ebx,PW_MF060_MF050)] ; mm6=(tmp2L)
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pmaddwd mm7, [GOTOFF(ebx,PW_MF060_MF050)] ; mm7=(tmp2H)
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pmaddwd mm2, [GOTOFF(ebx,PW_F145_MF021)] ; mm2=(tmp0L)
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pmaddwd mm3, [GOTOFF(ebx,PW_F145_MF021)] ; mm3=(tmp0H)
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paddd mm6, mm4 ; mm6=tmp2L
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paddd mm7, mm5 ; mm7=tmp2H
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paddd mm2, mm0 ; mm2=tmp0L
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paddd mm3, mm1 ; mm3=tmp0H
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movq MMWORD [wk(0)], mm2 ; wk(0)=tmp0L
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movq MMWORD [wk(1)], mm3 ; wk(1)=tmp0H
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; -- Even part
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movq mm4, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
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movq mm5, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
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movq mm0, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
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pmullw mm4, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
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pmullw mm5, MMWORD [MMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
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pmullw mm0, MMWORD [MMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
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pxor mm1, mm1
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pxor mm2, mm2
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punpcklwd mm1, mm4 ; mm1=tmp0L
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punpckhwd mm2, mm4 ; mm2=tmp0H
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psrad mm1, (16-CONST_BITS-1) ; psrad mm1,16 & pslld mm1,CONST_BITS+1
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psrad mm2, (16-CONST_BITS-1) ; psrad mm2,16 & pslld mm2,CONST_BITS+1
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movq mm3, mm5 ; mm5=in2=z2
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punpcklwd mm5, mm0 ; mm0=in6=z3
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punpckhwd mm3, mm0
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pmaddwd mm5, [GOTOFF(ebx,PW_F184_MF076)] ; mm5=tmp2L
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pmaddwd mm3, [GOTOFF(ebx,PW_F184_MF076)] ; mm3=tmp2H
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movq mm4, mm1
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movq mm0, mm2
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paddd mm1, mm5 ; mm1=tmp10L
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paddd mm2, mm3 ; mm2=tmp10H
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psubd mm4, mm5 ; mm4=tmp12L
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psubd mm0, mm3 ; mm0=tmp12H
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; -- Final output stage
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movq mm5, mm1
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movq mm3, mm2
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paddd mm1, mm6 ; mm1=data0L
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paddd mm2, mm7 ; mm2=data0H
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psubd mm5, mm6 ; mm5=data3L
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psubd mm3, mm7 ; mm3=data3H
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movq mm6, [GOTOFF(ebx,PD_DESCALE_P1_4)] ; mm6=[PD_DESCALE_P1_4]
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paddd mm1, mm6
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paddd mm2, mm6
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psrad mm1, DESCALE_P1_4
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psrad mm2, DESCALE_P1_4
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paddd mm5, mm6
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paddd mm3, mm6
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psrad mm5, DESCALE_P1_4
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psrad mm3, DESCALE_P1_4
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packssdw mm1, mm2 ; mm1=data0=(00 01 02 03)
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packssdw mm5, mm3 ; mm5=data3=(30 31 32 33)
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movq mm7, MMWORD [wk(0)] ; mm7=tmp0L
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movq mm6, MMWORD [wk(1)] ; mm6=tmp0H
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movq mm2, mm4
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movq mm3, mm0
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paddd mm4, mm7 ; mm4=data1L
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paddd mm0, mm6 ; mm0=data1H
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psubd mm2, mm7 ; mm2=data2L
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psubd mm3, mm6 ; mm3=data2H
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movq mm7, [GOTOFF(ebx,PD_DESCALE_P1_4)] ; mm7=[PD_DESCALE_P1_4]
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paddd mm4, mm7
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paddd mm0, mm7
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psrad mm4, DESCALE_P1_4
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psrad mm0, DESCALE_P1_4
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paddd mm2, mm7
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paddd mm3, mm7
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psrad mm2, DESCALE_P1_4
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psrad mm3, DESCALE_P1_4
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packssdw mm4, mm0 ; mm4=data1=(10 11 12 13)
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packssdw mm2, mm3 ; mm2=data2=(20 21 22 23)
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movq mm6, mm1 ; transpose coefficients(phase 1)
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punpcklwd mm1, mm4 ; mm1=(00 10 01 11)
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punpckhwd mm6, mm4 ; mm6=(02 12 03 13)
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movq mm7, mm2 ; transpose coefficients(phase 1)
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punpcklwd mm2, mm5 ; mm2=(20 30 21 31)
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punpckhwd mm7, mm5 ; mm7=(22 32 23 33)
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movq mm0, mm1 ; transpose coefficients(phase 2)
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punpckldq mm1, mm2 ; mm1=(00 10 20 30)
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punpckhdq mm0, mm2 ; mm0=(01 11 21 31)
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movq mm3, mm6 ; transpose coefficients(phase 2)
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punpckldq mm6, mm7 ; mm6=(02 12 22 32)
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punpckhdq mm3, mm7 ; mm3=(03 13 23 33)
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movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm1
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movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm0
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movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm6
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movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm3
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.nextcolumn:
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add esi, byte 4*SIZEOF_JCOEF ; coef_block
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add edx, byte 4*SIZEOF_ISLOW_MULT_TYPE ; quantptr
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add edi, byte 4*DCTSIZE*SIZEOF_JCOEF ; wsptr
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dec ecx ; ctr
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jnz near .columnloop
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; ---- Pass 2: process rows from work array, store into output array.
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mov eax, [original_ebp]
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lea esi, [workspace] ; JCOEF *wsptr
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mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
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mov eax, JDIMENSION [output_col(eax)]
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; -- Odd part
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movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
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movq mm1, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
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movq mm2, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
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movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
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movq mm4, mm0
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movq mm5, mm0
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punpcklwd mm4, mm1
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punpckhwd mm5, mm1
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movq mm0, mm4
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movq mm1, mm5
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pmaddwd mm4, [GOTOFF(ebx,PW_F256_F089)] ; mm4=(tmp2L)
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pmaddwd mm5, [GOTOFF(ebx,PW_F256_F089)] ; mm5=(tmp2H)
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pmaddwd mm0, [GOTOFF(ebx,PW_F106_MF217)] ; mm0=(tmp0L)
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pmaddwd mm1, [GOTOFF(ebx,PW_F106_MF217)] ; mm1=(tmp0H)
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movq mm6, mm2
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movq mm7, mm2
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punpcklwd mm6, mm3
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punpckhwd mm7, mm3
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movq mm2, mm6
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movq mm3, mm7
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pmaddwd mm6, [GOTOFF(ebx,PW_MF060_MF050)] ; mm6=(tmp2L)
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pmaddwd mm7, [GOTOFF(ebx,PW_MF060_MF050)] ; mm7=(tmp2H)
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pmaddwd mm2, [GOTOFF(ebx,PW_F145_MF021)] ; mm2=(tmp0L)
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pmaddwd mm3, [GOTOFF(ebx,PW_F145_MF021)] ; mm3=(tmp0H)
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paddd mm6, mm4 ; mm6=tmp2L
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paddd mm7, mm5 ; mm7=tmp2H
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paddd mm2, mm0 ; mm2=tmp0L
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paddd mm3, mm1 ; mm3=tmp0H
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movq MMWORD [wk(0)], mm2 ; wk(0)=tmp0L
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movq MMWORD [wk(1)], mm3 ; wk(1)=tmp0H
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; -- Even part
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movq mm4, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
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movq mm5, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
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movq mm0, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
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pxor mm1, mm1
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pxor mm2, mm2
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punpcklwd mm1, mm4 ; mm1=tmp0L
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|
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
|