123f7258a8
The IJG convention is to format copyright notices as: Copyright (C) YYYY, Owner. We try to maintain this convention for any code that is part of the libjpeg API library (with the exception of preserving the copyright notices from Cendio's code verbatim, since those predate libjpeg-turbo.) Note that the phrase "All Rights Reserved" is no longer necessary, since all Buenos Aires Convention signatories signed onto the Berne Convention in 2000. However, our convention is to retain this phrase for any files that have a self-contained copyright header but to leave it off of any files that refer to another file for conditions of distribution and use. For instance, all of the non-SIMD files in the libjpeg API library refer to README.ijg, and the copyright message in that file contains "All Rights Reserved", so it is unnecessary to add it to the individual files. The TurboJPEG code retains my preferred formatting convention for copyright notices, which is based on that of VirtualGL (where the TurboJPEG API originated.)
158 lines
5.2 KiB
NASM
158 lines
5.2 KiB
NASM
;
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; jquantf.asm - sample data conversion and quantization (64-bit SSE & SSE2)
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;
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; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
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; Copyright (C) 2009, 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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; [TAB8]
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%include "jsimdext.inc"
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%include "jdct.inc"
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; --------------------------------------------------------------------------
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SECTION SEG_TEXT
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BITS 64
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;
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; Load data into workspace, applying unsigned->signed conversion
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;
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; GLOBAL(void)
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; jsimd_convsamp_float_sse2 (JSAMPARRAY sample_data, JDIMENSION start_col,
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; FAST_FLOAT *workspace);
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;
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; r10 = JSAMPARRAY sample_data
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; r11 = JDIMENSION start_col
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; r12 = FAST_FLOAT *workspace
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align 16
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global EXTN(jsimd_convsamp_float_sse2)
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EXTN(jsimd_convsamp_float_sse2):
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push rbp
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mov rax,rsp
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mov rbp,rsp
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collect_args
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push rbx
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pcmpeqw xmm7,xmm7
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psllw xmm7,7
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packsswb xmm7,xmm7 ; xmm7 = PB_CENTERJSAMPLE (0x808080..)
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mov rsi, r10
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mov eax, r11d
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mov rdi, r12
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mov rcx, DCTSIZE/2
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.convloop:
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mov rbx, JSAMPROW [rsi+0*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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mov rdx, JSAMPROW [rsi+1*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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movq xmm0, XMM_MMWORD [rbx+rax*SIZEOF_JSAMPLE]
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movq xmm1, XMM_MMWORD [rdx+rax*SIZEOF_JSAMPLE]
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psubb xmm0,xmm7 ; xmm0=(01234567)
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psubb xmm1,xmm7 ; xmm1=(89ABCDEF)
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punpcklbw xmm0,xmm0 ; xmm0=(*0*1*2*3*4*5*6*7)
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punpcklbw xmm1,xmm1 ; xmm1=(*8*9*A*B*C*D*E*F)
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punpcklwd xmm2,xmm0 ; xmm2=(***0***1***2***3)
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punpckhwd xmm0,xmm0 ; xmm0=(***4***5***6***7)
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punpcklwd xmm3,xmm1 ; xmm3=(***8***9***A***B)
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punpckhwd xmm1,xmm1 ; xmm1=(***C***D***E***F)
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psrad xmm2,(DWORD_BIT-BYTE_BIT) ; xmm2=(0123)
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psrad xmm0,(DWORD_BIT-BYTE_BIT) ; xmm0=(4567)
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cvtdq2ps xmm2,xmm2 ; xmm2=(0123)
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cvtdq2ps xmm0,xmm0 ; xmm0=(4567)
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psrad xmm3,(DWORD_BIT-BYTE_BIT) ; xmm3=(89AB)
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psrad xmm1,(DWORD_BIT-BYTE_BIT) ; xmm1=(CDEF)
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cvtdq2ps xmm3,xmm3 ; xmm3=(89AB)
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cvtdq2ps xmm1,xmm1 ; xmm1=(CDEF)
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movaps XMMWORD [XMMBLOCK(0,0,rdi,SIZEOF_FAST_FLOAT)], xmm2
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movaps XMMWORD [XMMBLOCK(0,1,rdi,SIZEOF_FAST_FLOAT)], xmm0
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movaps XMMWORD [XMMBLOCK(1,0,rdi,SIZEOF_FAST_FLOAT)], xmm3
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movaps XMMWORD [XMMBLOCK(1,1,rdi,SIZEOF_FAST_FLOAT)], xmm1
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add rsi, byte 2*SIZEOF_JSAMPROW
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add rdi, byte 2*DCTSIZE*SIZEOF_FAST_FLOAT
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dec rcx
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jnz short .convloop
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pop rbx
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uncollect_args
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pop rbp
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ret
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; --------------------------------------------------------------------------
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;
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; Quantize/descale the coefficients, and store into coef_block
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;
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; GLOBAL(void)
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; jsimd_quantize_float_sse2 (JCOEFPTR coef_block, FAST_FLOAT *divisors,
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; FAST_FLOAT *workspace);
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;
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; r10 = JCOEFPTR coef_block
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; r11 = FAST_FLOAT *divisors
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; r12 = FAST_FLOAT *workspace
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align 16
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global EXTN(jsimd_quantize_float_sse2)
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EXTN(jsimd_quantize_float_sse2):
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push rbp
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mov rax,rsp
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mov rbp,rsp
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collect_args
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mov rsi, r12
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mov rdx, r11
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mov rdi, r10
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mov rax, DCTSIZE2/16
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.quantloop:
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movaps xmm0, XMMWORD [XMMBLOCK(0,0,rsi,SIZEOF_FAST_FLOAT)]
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movaps xmm1, XMMWORD [XMMBLOCK(0,1,rsi,SIZEOF_FAST_FLOAT)]
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mulps xmm0, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_FAST_FLOAT)]
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mulps xmm1, XMMWORD [XMMBLOCK(0,1,rdx,SIZEOF_FAST_FLOAT)]
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movaps xmm2, XMMWORD [XMMBLOCK(1,0,rsi,SIZEOF_FAST_FLOAT)]
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movaps xmm3, XMMWORD [XMMBLOCK(1,1,rsi,SIZEOF_FAST_FLOAT)]
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mulps xmm2, XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_FAST_FLOAT)]
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mulps xmm3, XMMWORD [XMMBLOCK(1,1,rdx,SIZEOF_FAST_FLOAT)]
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cvtps2dq xmm0,xmm0
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cvtps2dq xmm1,xmm1
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cvtps2dq xmm2,xmm2
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cvtps2dq xmm3,xmm3
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packssdw xmm0,xmm1
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packssdw xmm2,xmm3
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movdqa XMMWORD [XMMBLOCK(0,0,rdi,SIZEOF_JCOEF)], xmm0
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movdqa XMMWORD [XMMBLOCK(1,0,rdi,SIZEOF_JCOEF)], xmm2
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add rsi, byte 16*SIZEOF_FAST_FLOAT
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add rdx, byte 16*SIZEOF_FAST_FLOAT
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add rdi, byte 16*SIZEOF_JCOEF
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dec rax
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jnz short .quantloop
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uncollect_args
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pop rbp
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ret
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; For some reason, the OS X linker does not honor the request to align the
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; segment unless we do this.
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align 16
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