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451 lines
17 KiB
NASM
451 lines
17 KiB
NASM
;
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; jidctflt.asm - floating-point IDCT (3DNow! & 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 a floating-point implementation of the inverse DCT
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; (Discrete Cosine Transform). The following code is based directly on
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; the IJG's original jidctflt.c; see the jidctflt.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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SECTION SEG_CONST
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alignz 32
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GLOBAL_DATA(jconst_idct_float_3dnow)
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EXTN(jconst_idct_float_3dnow):
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PD_1_414 times 2 dd 1.414213562373095048801689
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PD_1_847 times 2 dd 1.847759065022573512256366
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PD_1_082 times 2 dd 1.082392200292393968799446
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PD_2_613 times 2 dd 2.613125929752753055713286
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PD_RNDINT_MAGIC times 2 dd 100663296.0 ; (float)(0x00C00000 << 3)
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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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;
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; GLOBAL(void)
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; jsimd_idct_float_3dnow(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_FAST_FLOAT
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; FAST_FLOAT workspace[DCTSIZE2]
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align 32
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GLOBAL_FUNCTION(jsimd_idct_float_3dnow)
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EXTN(jsimd_idct_float_3dnow):
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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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push 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] ; FAST_FLOAT *wsptr
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mov ecx, DCTSIZE/2 ; ctr
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alignx 16, 7
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.columnloop:
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%ifndef NO_ZERO_COLUMN_TEST_FLOAT_3DNOW
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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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pushpic ebx ; save GOT address
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mov ebx, dword [DWBLOCK(3,0,esi,SIZEOF_JCOEF)]
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mov eax, dword [DWBLOCK(4,0,esi,SIZEOF_JCOEF)]
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or ebx, dword [DWBLOCK(5,0,esi,SIZEOF_JCOEF)]
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or eax, dword [DWBLOCK(6,0,esi,SIZEOF_JCOEF)]
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or ebx, dword [DWBLOCK(7,0,esi,SIZEOF_JCOEF)]
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or eax, ebx
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poppic ebx ; restore GOT address
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jnz short .columnDCT
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; -- AC terms all zero
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movd mm0, dword [DWBLOCK(0,0,esi,SIZEOF_JCOEF)]
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punpcklwd mm0, mm0
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psrad mm0, (DWORD_BIT-WORD_BIT)
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pi2fd mm0, mm0
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pfmul mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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movq mm1, mm0
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punpckldq mm0, mm0
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punpckhdq mm1, mm1
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movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], mm0
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movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], mm0
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movq MMWORD [MMBLOCK(0,2,edi,SIZEOF_FAST_FLOAT)], mm0
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movq MMWORD [MMBLOCK(0,3,edi,SIZEOF_FAST_FLOAT)], mm0
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movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], mm1
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movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], mm1
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movq MMWORD [MMBLOCK(1,2,edi,SIZEOF_FAST_FLOAT)], mm1
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movq MMWORD [MMBLOCK(1,3,edi,SIZEOF_FAST_FLOAT)], mm1
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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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; -- Even part
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movd mm0, dword [DWBLOCK(0,0,esi,SIZEOF_JCOEF)]
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movd mm1, dword [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
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movd mm2, dword [DWBLOCK(4,0,esi,SIZEOF_JCOEF)]
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movd mm3, dword [DWBLOCK(6,0,esi,SIZEOF_JCOEF)]
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punpcklwd mm0, mm0
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punpcklwd mm1, mm1
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psrad mm0, (DWORD_BIT-WORD_BIT)
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psrad mm1, (DWORD_BIT-WORD_BIT)
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pi2fd mm0, mm0
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pi2fd mm1, mm1
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pfmul mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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pfmul mm1, MMWORD [MMBLOCK(2,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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punpcklwd mm2, mm2
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punpcklwd mm3, mm3
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psrad mm2, (DWORD_BIT-WORD_BIT)
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psrad mm3, (DWORD_BIT-WORD_BIT)
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pi2fd mm2, mm2
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pi2fd mm3, mm3
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pfmul mm2, MMWORD [MMBLOCK(4,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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pfmul mm3, MMWORD [MMBLOCK(6,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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movq mm4, mm0
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movq mm5, mm1
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pfsub mm0, mm2 ; mm0=tmp11
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pfsub mm1, mm3
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pfadd mm4, mm2 ; mm4=tmp10
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pfadd mm5, mm3 ; mm5=tmp13
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pfmul mm1, [GOTOFF(ebx,PD_1_414)]
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pfsub mm1, mm5 ; mm1=tmp12
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movq mm6, mm4
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movq mm7, mm0
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pfsub mm4, mm5 ; mm4=tmp3
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pfsub mm0, mm1 ; mm0=tmp2
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pfadd mm6, mm5 ; mm6=tmp0
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pfadd mm7, mm1 ; mm7=tmp1
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movq MMWORD [wk(1)], mm4 ; tmp3
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movq MMWORD [wk(0)], mm0 ; tmp2
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; -- Odd part
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movd mm2, dword [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
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movd mm3, dword [DWBLOCK(3,0,esi,SIZEOF_JCOEF)]
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movd mm5, dword [DWBLOCK(5,0,esi,SIZEOF_JCOEF)]
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movd mm1, dword [DWBLOCK(7,0,esi,SIZEOF_JCOEF)]
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punpcklwd mm2, mm2
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punpcklwd mm3, mm3
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psrad mm2, (DWORD_BIT-WORD_BIT)
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psrad mm3, (DWORD_BIT-WORD_BIT)
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pi2fd mm2, mm2
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pi2fd mm3, mm3
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pfmul mm2, MMWORD [MMBLOCK(1,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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pfmul mm3, MMWORD [MMBLOCK(3,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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punpcklwd mm5, mm5
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punpcklwd mm1, mm1
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psrad mm5, (DWORD_BIT-WORD_BIT)
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psrad mm1, (DWORD_BIT-WORD_BIT)
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pi2fd mm5, mm5
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pi2fd mm1, mm1
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pfmul mm5, MMWORD [MMBLOCK(5,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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pfmul mm1, MMWORD [MMBLOCK(7,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
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movq mm4, mm2
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movq mm0, mm5
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pfadd mm2, mm1 ; mm2=z11
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pfadd mm5, mm3 ; mm5=z13
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pfsub mm4, mm1 ; mm4=z12
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pfsub mm0, mm3 ; mm0=z10
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movq mm1, mm2
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pfsub mm2, mm5
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pfadd mm1, mm5 ; mm1=tmp7
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pfmul mm2, [GOTOFF(ebx,PD_1_414)] ; mm2=tmp11
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movq mm3, mm0
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pfadd mm0, mm4
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pfmul mm0, [GOTOFF(ebx,PD_1_847)] ; mm0=z5
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pfmul mm3, [GOTOFF(ebx,PD_2_613)] ; mm3=(z10 * 2.613125930)
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pfmul mm4, [GOTOFF(ebx,PD_1_082)] ; mm4=(z12 * 1.082392200)
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pfsubr mm3, mm0 ; mm3=tmp12
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pfsub mm4, mm0 ; mm4=tmp10
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; -- Final output stage
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pfsub mm3, mm1 ; mm3=tmp6
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movq mm5, mm6
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movq mm0, mm7
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pfadd mm6, mm1 ; mm6=data0=(00 01)
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pfadd mm7, mm3 ; mm7=data1=(10 11)
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pfsub mm5, mm1 ; mm5=data7=(70 71)
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pfsub mm0, mm3 ; mm0=data6=(60 61)
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pfsub mm2, mm3 ; mm2=tmp5
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movq mm1, mm6 ; transpose coefficients
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punpckldq mm6, mm7 ; mm6=(00 10)
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punpckhdq mm1, mm7 ; mm1=(01 11)
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movq mm3, mm0 ; transpose coefficients
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punpckldq mm0, mm5 ; mm0=(60 70)
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punpckhdq mm3, mm5 ; mm3=(61 71)
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movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], mm6
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movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], mm1
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movq MMWORD [MMBLOCK(0,3,edi,SIZEOF_FAST_FLOAT)], mm0
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movq MMWORD [MMBLOCK(1,3,edi,SIZEOF_FAST_FLOAT)], mm3
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movq mm7, MMWORD [wk(0)] ; mm7=tmp2
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movq mm5, MMWORD [wk(1)] ; mm5=tmp3
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pfadd mm4, mm2 ; mm4=tmp4
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movq mm6, mm7
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movq mm1, mm5
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pfadd mm7, mm2 ; mm7=data2=(20 21)
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pfadd mm5, mm4 ; mm5=data4=(40 41)
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pfsub mm6, mm2 ; mm6=data5=(50 51)
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pfsub mm1, mm4 ; mm1=data3=(30 31)
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movq mm0, mm7 ; transpose coefficients
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punpckldq mm7, mm1 ; mm7=(20 30)
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punpckhdq mm0, mm1 ; mm0=(21 31)
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movq mm3, mm5 ; transpose coefficients
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punpckldq mm5, mm6 ; mm5=(40 50)
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punpckhdq mm3, mm6 ; mm3=(41 51)
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movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], mm7
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movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], mm0
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movq MMWORD [MMBLOCK(0,2,edi,SIZEOF_FAST_FLOAT)], mm5
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movq MMWORD [MMBLOCK(1,2,edi,SIZEOF_FAST_FLOAT)], mm3
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.nextcolumn:
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add esi, byte 2*SIZEOF_JCOEF ; coef_block
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add edx, byte 2*SIZEOF_FLOAT_MULT_TYPE ; quantptr
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add edi, byte 2*DCTSIZE*SIZEOF_FAST_FLOAT ; wsptr
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dec ecx ; ctr
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jnz near .columnloop
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; -- Prefetch the next coefficient block
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prefetch [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 0*32]
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prefetch [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 1*32]
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prefetch [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 2*32]
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prefetch [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 3*32]
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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] ; FAST_FLOAT *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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mov ecx, DCTSIZE/2 ; ctr
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alignx 16, 7
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.rowloop:
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; -- Even part
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movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)]
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movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_FAST_FLOAT)]
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movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_FAST_FLOAT)]
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movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_FAST_FLOAT)]
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movq mm4, mm0
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movq mm5, mm1
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pfsub mm0, mm2 ; mm0=tmp11
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pfsub mm1, mm3
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pfadd mm4, mm2 ; mm4=tmp10
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pfadd mm5, mm3 ; mm5=tmp13
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pfmul mm1, [GOTOFF(ebx,PD_1_414)]
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pfsub mm1, mm5 ; mm1=tmp12
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movq mm6, mm4
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movq mm7, mm0
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pfsub mm4, mm5 ; mm4=tmp3
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pfsub mm0, mm1 ; mm0=tmp2
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pfadd mm6, mm5 ; mm6=tmp0
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pfadd mm7, mm1 ; mm7=tmp1
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movq MMWORD [wk(1)], mm4 ; tmp3
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movq MMWORD [wk(0)], mm0 ; tmp2
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; -- Odd part
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movq mm2, MMWORD [MMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)]
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movq mm3, MMWORD [MMBLOCK(3,0,esi,SIZEOF_FAST_FLOAT)]
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movq mm5, MMWORD [MMBLOCK(5,0,esi,SIZEOF_FAST_FLOAT)]
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movq mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_FAST_FLOAT)]
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movq mm4, mm2
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movq mm0, mm5
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pfadd mm2, mm1 ; mm2=z11
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pfadd mm5, mm3 ; mm5=z13
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pfsub mm4, mm1 ; mm4=z12
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pfsub mm0, mm3 ; mm0=z10
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movq mm1, mm2
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pfsub mm2, mm5
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pfadd mm1, mm5 ; mm1=tmp7
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pfmul mm2, [GOTOFF(ebx,PD_1_414)] ; mm2=tmp11
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movq mm3, mm0
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pfadd mm0, mm4
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pfmul mm0, [GOTOFF(ebx,PD_1_847)] ; mm0=z5
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pfmul mm3, [GOTOFF(ebx,PD_2_613)] ; mm3=(z10 * 2.613125930)
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pfmul mm4, [GOTOFF(ebx,PD_1_082)] ; mm4=(z12 * 1.082392200)
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pfsubr mm3, mm0 ; mm3=tmp12
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pfsub mm4, mm0 ; mm4=tmp10
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; -- Final output stage
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pfsub mm3, mm1 ; mm3=tmp6
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movq mm5, mm6
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movq mm0, mm7
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pfadd mm6, mm1 ; mm6=data0=(00 10)
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pfadd mm7, mm3 ; mm7=data1=(01 11)
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pfsub mm5, mm1 ; mm5=data7=(07 17)
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pfsub mm0, mm3 ; mm0=data6=(06 16)
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pfsub mm2, mm3 ; mm2=tmp5
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movq mm1, [GOTOFF(ebx,PD_RNDINT_MAGIC)] ; mm1=[PD_RNDINT_MAGIC]
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pcmpeqd mm3, mm3
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psrld mm3, WORD_BIT ; mm3={0xFFFF 0x0000 0xFFFF 0x0000}
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pfadd mm6, mm1 ; mm6=roundint(data0/8)=(00 ** 10 **)
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pfadd mm7, mm1 ; mm7=roundint(data1/8)=(01 ** 11 **)
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pfadd mm0, mm1 ; mm0=roundint(data6/8)=(06 ** 16 **)
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pfadd mm5, mm1 ; mm5=roundint(data7/8)=(07 ** 17 **)
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pand mm6, mm3 ; mm6=(00 -- 10 --)
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pslld mm7, WORD_BIT ; mm7=(-- 01 -- 11)
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pand mm0, mm3 ; mm0=(06 -- 16 --)
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pslld mm5, WORD_BIT ; mm5=(-- 07 -- 17)
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por mm6, mm7 ; mm6=(00 01 10 11)
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por mm0, mm5 ; mm0=(06 07 16 17)
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movq mm1, MMWORD [wk(0)] ; mm1=tmp2
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movq mm3, MMWORD [wk(1)] ; mm3=tmp3
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pfadd mm4, mm2 ; mm4=tmp4
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movq mm7, mm1
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movq mm5, mm3
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pfadd mm1, mm2 ; mm1=data2=(02 12)
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pfadd mm3, mm4 ; mm3=data4=(04 14)
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pfsub mm7, mm2 ; mm7=data5=(05 15)
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pfsub mm5, mm4 ; mm5=data3=(03 13)
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movq mm2, [GOTOFF(ebx,PD_RNDINT_MAGIC)] ; mm2=[PD_RNDINT_MAGIC]
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pcmpeqd mm4, mm4
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psrld mm4, WORD_BIT ; mm4={0xFFFF 0x0000 0xFFFF 0x0000}
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pfadd mm3, mm2 ; mm3=roundint(data4/8)=(04 ** 14 **)
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pfadd mm7, mm2 ; mm7=roundint(data5/8)=(05 ** 15 **)
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pfadd mm1, mm2 ; mm1=roundint(data2/8)=(02 ** 12 **)
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pfadd mm5, mm2 ; mm5=roundint(data3/8)=(03 ** 13 **)
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pand mm3, mm4 ; mm3=(04 -- 14 --)
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pslld mm7, WORD_BIT ; mm7=(-- 05 -- 15)
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pand mm1, mm4 ; mm1=(02 -- 12 --)
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pslld mm5, WORD_BIT ; mm5=(-- 03 -- 13)
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por mm3, mm7 ; mm3=(04 05 14 15)
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por mm1, mm5 ; mm1=(02 03 12 13)
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movq mm2, [GOTOFF(ebx,PB_CENTERJSAMP)] ; mm2=[PB_CENTERJSAMP]
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packsswb mm6, mm3 ; mm6=(00 01 10 11 04 05 14 15)
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packsswb mm1, mm0 ; mm1=(02 03 12 13 06 07 16 17)
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paddb mm6, mm2
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paddb mm1, mm2
|
|
|
|
movq mm4, mm6 ; transpose coefficients(phase 2)
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|
punpcklwd mm6, mm1 ; mm6=(00 01 02 03 10 11 12 13)
|
|
punpckhwd mm4, mm1 ; mm4=(04 05 06 07 14 15 16 17)
|
|
|
|
movq mm7, mm6 ; transpose coefficients(phase 3)
|
|
punpckldq mm6, mm4 ; mm6=(00 01 02 03 04 05 06 07)
|
|
punpckhdq mm7, mm4 ; mm7=(10 11 12 13 14 15 16 17)
|
|
|
|
pushpic ebx ; save GOT address
|
|
|
|
mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
|
|
mov ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
|
|
movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm6
|
|
movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm7
|
|
|
|
poppic ebx ; restore GOT address
|
|
|
|
add esi, byte 2*SIZEOF_FAST_FLOAT ; wsptr
|
|
add edi, byte 2*SIZEOF_JSAMPROW
|
|
dec ecx ; ctr
|
|
jnz near .rowloop
|
|
|
|
femms ; empty MMX/3DNow! state
|
|
|
|
pop edi
|
|
pop esi
|
|
; pop edx ; need not be preserved
|
|
; pop ecx ; need not be preserved
|
|
pop ebx
|
|
mov esp, ebp ; esp <- aligned ebp
|
|
pop esp ; esp <- original ebp
|
|
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
|