| ; |
| ; Reduced-size IDCT (32-bit MMX) |
| ; |
| ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB |
| ; Copyright (C) 2016, 2024-2025, 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) or Yasm. |
| ; |
| ; 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 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 |
