summaryrefslogtreecommitdiffstats
path: root/media/libjpeg/simd/i386/jquanti-sse2.asm
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--media/libjpeg/simd/i386/jquanti-sse2.asm201
1 files changed, 201 insertions, 0 deletions
diff --git a/media/libjpeg/simd/i386/jquanti-sse2.asm b/media/libjpeg/simd/i386/jquanti-sse2.asm
new file mode 100644
index 0000000000..0a509408aa
--- /dev/null
+++ b/media/libjpeg/simd/i386/jquanti-sse2.asm
@@ -0,0 +1,201 @@
+;
+; jquanti.asm - sample data conversion and quantization (SSE2)
+;
+; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
+; Copyright (C) 2016, 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),
+; 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
+
+%include "jsimdext.inc"
+%include "jdct.inc"
+
+; --------------------------------------------------------------------------
+ SECTION SEG_TEXT
+ BITS 32
+;
+; Load data into workspace, applying unsigned->signed conversion
+;
+; GLOBAL(void)
+; jsimd_convsamp_sse2(JSAMPARRAY sample_data, JDIMENSION start_col,
+; DCTELEM *workspace);
+;
+
+%define sample_data ebp + 8 ; JSAMPARRAY sample_data
+%define start_col ebp + 12 ; JDIMENSION start_col
+%define workspace ebp + 16 ; DCTELEM *workspace
+
+ align 32
+ GLOBAL_FUNCTION(jsimd_convsamp_sse2)
+
+EXTN(jsimd_convsamp_sse2):
+ push ebp
+ mov ebp, esp
+ push ebx
+; push ecx ; need not be preserved
+; push edx ; need not be preserved
+ push esi
+ push edi
+
+ pxor xmm6, xmm6 ; xmm6=(all 0's)
+ pcmpeqw xmm7, xmm7
+ psllw xmm7, 7 ; xmm7={0xFF80 0xFF80 0xFF80 0xFF80 ..}
+
+ mov esi, JSAMPARRAY [sample_data] ; (JSAMPROW *)
+ mov eax, JDIMENSION [start_col]
+ mov edi, POINTER [workspace] ; (DCTELEM *)
+ mov ecx, DCTSIZE/4
+ alignx 16, 7
+.convloop:
+ mov ebx, JSAMPROW [esi+0*SIZEOF_JSAMPROW] ; (JSAMPLE *)
+ mov edx, JSAMPROW [esi+1*SIZEOF_JSAMPROW] ; (JSAMPLE *)
+
+ movq xmm0, XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE] ; xmm0=(01234567)
+ movq xmm1, XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE] ; xmm1=(89ABCDEF)
+
+ mov ebx, JSAMPROW [esi+2*SIZEOF_JSAMPROW] ; (JSAMPLE *)
+ mov edx, JSAMPROW [esi+3*SIZEOF_JSAMPROW] ; (JSAMPLE *)
+
+ movq xmm2, XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE] ; xmm2=(GHIJKLMN)
+ movq xmm3, XMM_MMWORD [edx+eax*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,edi,SIZEOF_DCTELEM)], xmm0
+ movdqa XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_DCTELEM)], xmm1
+ movdqa XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_DCTELEM)], xmm2
+ movdqa XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_DCTELEM)], xmm3
+
+ add esi, byte 4*SIZEOF_JSAMPROW
+ add edi, byte 4*DCTSIZE*SIZEOF_DCTELEM
+ dec ecx
+ jnz short .convloop
+
+ pop edi
+ pop esi
+; pop edx ; need not be preserved
+; pop ecx ; need not be preserved
+ pop ebx
+ pop ebp
+ 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)
+
+%define coef_block ebp + 8 ; JCOEFPTR coef_block
+%define divisors ebp + 12 ; DCTELEM *divisors
+%define workspace ebp + 16 ; DCTELEM *workspace
+
+ align 32
+ GLOBAL_FUNCTION(jsimd_quantize_sse2)
+
+EXTN(jsimd_quantize_sse2):
+ push ebp
+ mov ebp, esp
+; push ebx ; unused
+; push ecx ; unused
+; push edx ; need not be preserved
+ push esi
+ push edi
+
+ mov esi, POINTER [workspace]
+ mov edx, POINTER [divisors]
+ mov edi, JCOEFPTR [coef_block]
+ mov eax, DCTSIZE2/32
+ alignx 16, 7
+.quantloop:
+ movdqa xmm4, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_DCTELEM)]
+ movdqa xmm5, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_DCTELEM)]
+ movdqa xmm6, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_DCTELEM)]
+ movdqa xmm7, XMMWORD [XMMBLOCK(3,0,esi,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,edx)] ; correction + roundfactor
+ paddw xmm1, XMMWORD [CORRECTION(1,0,edx)]
+ paddw xmm2, XMMWORD [CORRECTION(2,0,edx)]
+ paddw xmm3, XMMWORD [CORRECTION(3,0,edx)]
+ pmulhuw xmm0, XMMWORD [RECIPROCAL(0,0,edx)] ; reciprocal
+ pmulhuw xmm1, XMMWORD [RECIPROCAL(1,0,edx)]
+ pmulhuw xmm2, XMMWORD [RECIPROCAL(2,0,edx)]
+ pmulhuw xmm3, XMMWORD [RECIPROCAL(3,0,edx)]
+ pmulhuw xmm0, XMMWORD [SCALE(0,0,edx)] ; scale
+ pmulhuw xmm1, XMMWORD [SCALE(1,0,edx)]
+ pmulhuw xmm2, XMMWORD [SCALE(2,0,edx)]
+ pmulhuw xmm3, XMMWORD [SCALE(3,0,edx)]
+
+ 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,edi,SIZEOF_DCTELEM)], xmm0
+ movdqa XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_DCTELEM)], xmm1
+ movdqa XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_DCTELEM)], xmm2
+ movdqa XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_DCTELEM)], xmm3
+
+ add esi, byte 32*SIZEOF_DCTELEM
+ add edx, byte 32*SIZEOF_DCTELEM
+ add edi, byte 32*SIZEOF_JCOEF
+ dec eax
+ jnz near .quantloop
+
+ pop edi
+ pop esi
+; pop edx ; need not be preserved
+; pop ecx ; unused
+; pop ebx ; unused
+ 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
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-11 19:20:52 +0000