64-bit SIMD acceleration
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@3858 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/common/jpeg/simd/jcqnts2i-64.asm b/common/jpeg/simd/jcqnts2i-64.asm
new file mode 100644
index 0000000..d561590
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+++ b/common/jpeg/simd/jcqnts2i-64.asm
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+;
+; jcqnts2i.asm - sample data conversion and quantization (64-bit SSE2)
+;
+; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
+; Copyright 2009 D. R. Commander
+;
+; Based on
+; x86 SIMD extension for IJG JPEG library
+; Copyright (C) 1999-2006, MIYASAKA Masaru.
+; For conditions of distribution and use, see copyright notice in jsimdext.inc
+;
+; This file should be assembled with NASM (Netwide Assembler),
+; can *not* be assembled with Microsoft's MASM or any compatible
+; assembler (including Borland's Turbo Assembler).
+; NASM is available from http://nasm.sourceforge.net/ or
+; http://sourceforge.net/project/showfiles.php?group_id=6208
+;
+; [TAB8]
+
+%include "jsimdext.inc"
+%include "jdct.inc"
+
+; --------------------------------------------------------------------------
+ SECTION SEG_TEXT
+ BITS 64
+;
+; Load data into workspace, applying unsigned->signed conversion
+;
+; GLOBAL(void)
+; jsimd_convsamp_sse2 (JSAMPARRAY sample_data, JDIMENSION start_col,
+; DCTELEM * workspace);
+;
+
+; r10 = JSAMPARRAY sample_data
+; r11 = JDIMENSION start_col
+; r12 = DCTELEM * workspace
+
+ align 16
+ global EXTN(jsimd_convsamp_sse2)
+
+EXTN(jsimd_convsamp_sse2):
+ push rbp
+ mov rbp,rsp
+ push rbx
+ collect_args
+
+ pxor xmm6,xmm6 ; xmm6=(all 0's)
+ pcmpeqw xmm7,xmm7
+ psllw xmm7,7 ; xmm7={0xFF80 0xFF80 0xFF80 0xFF80 ..}
+
+ mov rsi, r10
+ mov rax, r11
+ mov rdi, r12
+ mov rcx, DCTSIZE/4
+.convloop:
+ mov rbx, JSAMPROW [rsi+0*SIZEOF_JSAMPROW] ; (JSAMPLE *)
+ mov rdx, JSAMPROW [rsi+1*SIZEOF_JSAMPROW] ; (JSAMPLE *)
+
+ movq xmm0, XMM_MMWORD [rbx+rax*SIZEOF_JSAMPLE] ; xmm0=(01234567)
+ movq xmm1, XMM_MMWORD [rdx+rax*SIZEOF_JSAMPLE] ; xmm1=(89ABCDEF)
+
+ mov rbx, JSAMPROW [rsi+2*SIZEOF_JSAMPROW] ; (JSAMPLE *)
+ mov rdx, JSAMPROW [rsi+3*SIZEOF_JSAMPROW] ; (JSAMPLE *)
+
+ movq xmm2, XMM_MMWORD [rbx+rax*SIZEOF_JSAMPLE] ; xmm2=(GHIJKLMN)
+ movq xmm3, XMM_MMWORD [rdx+rax*SIZEOF_JSAMPLE] ; xmm3=(OPQRSTUV)
+
+ punpcklbw xmm0,xmm6 ; xmm0=(01234567)
+ punpcklbw xmm1,xmm6 ; xmm1=(89ABCDEF)
+ paddw xmm0,xmm7
+ paddw xmm1,xmm7
+ punpcklbw xmm2,xmm6 ; xmm2=(GHIJKLMN)
+ punpcklbw xmm3,xmm6 ; xmm3=(OPQRSTUV)
+ paddw xmm2,xmm7
+ paddw xmm3,xmm7
+
+ movdqa XMMWORD [XMMBLOCK(0,0,rdi,SIZEOF_DCTELEM)], xmm0
+ movdqa XMMWORD [XMMBLOCK(1,0,rdi,SIZEOF_DCTELEM)], xmm1
+ movdqa XMMWORD [XMMBLOCK(2,0,rdi,SIZEOF_DCTELEM)], xmm2
+ movdqa XMMWORD [XMMBLOCK(3,0,rdi,SIZEOF_DCTELEM)], xmm3
+
+ add rsi, byte 4*SIZEOF_JSAMPROW
+ add rdi, byte 4*DCTSIZE*SIZEOF_DCTELEM
+ dec rcx
+ jnz short .convloop
+
+ uncollect_args
+ pop rbx
+ pop rbp
+ ret
+
+; --------------------------------------------------------------------------
+;
+; Quantize/descale the coefficients, and store into coef_block
+;
+; This implementation is based on an algorithm described in
+; "How to optimize for the Pentium family of microprocessors"
+; (http://www.agner.org/assem/).
+;
+; GLOBAL(void)
+; jsimd_quantize_sse2 (JCOEFPTR coef_block, DCTELEM * divisors,
+; DCTELEM * workspace);
+;
+
+%define RECIPROCAL(m,n,b) XMMBLOCK(DCTSIZE*0+(m),(n),(b),SIZEOF_DCTELEM)
+%define CORRECTION(m,n,b) XMMBLOCK(DCTSIZE*1+(m),(n),(b),SIZEOF_DCTELEM)
+%define SCALE(m,n,b) XMMBLOCK(DCTSIZE*2+(m),(n),(b),SIZEOF_DCTELEM)
+
+; r10 = JCOEFPTR coef_block
+; r11 = DCTELEM * divisors
+; r12 = DCTELEM * workspace
+
+ align 16
+ global EXTN(jsimd_quantize_sse2)
+
+EXTN(jsimd_quantize_sse2):
+ push rbp
+ mov rbp,rsp
+ collect_args
+
+ mov rsi, r12
+ mov rdx, r11
+ mov rdi, r10
+ mov rax, DCTSIZE2/32
+.quantloop:
+ movdqa xmm4, XMMWORD [XMMBLOCK(0,0,rsi,SIZEOF_DCTELEM)]
+ movdqa xmm5, XMMWORD [XMMBLOCK(1,0,rsi,SIZEOF_DCTELEM)]
+ movdqa xmm6, XMMWORD [XMMBLOCK(2,0,rsi,SIZEOF_DCTELEM)]
+ movdqa xmm7, XMMWORD [XMMBLOCK(3,0,rsi,SIZEOF_DCTELEM)]
+ movdqa xmm0,xmm4
+ movdqa xmm1,xmm5
+ movdqa xmm2,xmm6
+ movdqa xmm3,xmm7
+ psraw xmm4,(WORD_BIT-1)
+ psraw xmm5,(WORD_BIT-1)
+ psraw xmm6,(WORD_BIT-1)
+ psraw xmm7,(WORD_BIT-1)
+ pxor xmm0,xmm4
+ pxor xmm1,xmm5
+ pxor xmm2,xmm6
+ pxor xmm3,xmm7
+ psubw xmm0,xmm4 ; if (xmm0 < 0) xmm0 = -xmm0;
+ psubw xmm1,xmm5 ; if (xmm1 < 0) xmm1 = -xmm1;
+ psubw xmm2,xmm6 ; if (xmm2 < 0) xmm2 = -xmm2;
+ psubw xmm3,xmm7 ; if (xmm3 < 0) xmm3 = -xmm3;
+
+ paddw xmm0, XMMWORD [CORRECTION(0,0,rdx)] ; correction + roundfactor
+ paddw xmm1, XMMWORD [CORRECTION(1,0,rdx)]
+ paddw xmm2, XMMWORD [CORRECTION(2,0,rdx)]
+ paddw xmm3, XMMWORD [CORRECTION(3,0,rdx)]
+ pmulhuw xmm0, XMMWORD [RECIPROCAL(0,0,rdx)] ; reciprocal
+ pmulhuw xmm1, XMMWORD [RECIPROCAL(1,0,rdx)]
+ pmulhuw xmm2, XMMWORD [RECIPROCAL(2,0,rdx)]
+ pmulhuw xmm3, XMMWORD [RECIPROCAL(3,0,rdx)]
+ pmulhuw xmm0, XMMWORD [SCALE(0,0,rdx)] ; scale
+ pmulhuw xmm1, XMMWORD [SCALE(1,0,rdx)]
+ pmulhuw xmm2, XMMWORD [SCALE(2,0,rdx)]
+ pmulhuw xmm3, XMMWORD [SCALE(3,0,rdx)]
+
+ pxor xmm0,xmm4
+ pxor xmm1,xmm5
+ pxor xmm2,xmm6
+ pxor xmm3,xmm7
+ psubw xmm0,xmm4
+ psubw xmm1,xmm5
+ psubw xmm2,xmm6
+ psubw xmm3,xmm7
+ movdqa XMMWORD [XMMBLOCK(0,0,rdi,SIZEOF_DCTELEM)], xmm0
+ movdqa XMMWORD [XMMBLOCK(1,0,rdi,SIZEOF_DCTELEM)], xmm1
+ movdqa XMMWORD [XMMBLOCK(2,0,rdi,SIZEOF_DCTELEM)], xmm2
+ movdqa XMMWORD [XMMBLOCK(3,0,rdi,SIZEOF_DCTELEM)], xmm3
+
+ add rsi, byte 32*SIZEOF_DCTELEM
+ add rdx, byte 32*SIZEOF_DCTELEM
+ add rdi, byte 32*SIZEOF_JCOEF
+ dec rax
+ jnz near .quantloop
+
+ uncollect_args
+ pop rbp
+ ret