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-rw-r--r--media/libjpeg/simd/i386/jcsample-sse2.asm351
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diff --git a/media/libjpeg/simd/i386/jcsample-sse2.asm b/media/libjpeg/simd/i386/jcsample-sse2.asm
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+;
+; jcsample.asm - downsampling (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"
+
+; --------------------------------------------------------------------------
+ SECTION SEG_TEXT
+ BITS 32
+;
+; Downsample pixel values of a single component.
+; This version handles the common case of 2:1 horizontal and 1:1 vertical,
+; without smoothing.
+;
+; GLOBAL(void)
+; jsimd_h2v1_downsample_sse2(JDIMENSION image_width, int max_v_samp_factor,
+; JDIMENSION v_samp_factor,
+; JDIMENSION width_in_blocks, JSAMPARRAY input_data,
+; JSAMPARRAY output_data);
+;
+
+%define img_width(b) (b) + 8 ; JDIMENSION image_width
+%define max_v_samp(b) (b) + 12 ; int max_v_samp_factor
+%define v_samp(b) (b) + 16 ; JDIMENSION v_samp_factor
+%define width_blks(b) (b) + 20 ; JDIMENSION width_in_blocks
+%define input_data(b) (b) + 24 ; JSAMPARRAY input_data
+%define output_data(b) (b) + 28 ; JSAMPARRAY output_data
+
+ align 32
+ GLOBAL_FUNCTION(jsimd_h2v1_downsample_sse2)
+
+EXTN(jsimd_h2v1_downsample_sse2):
+ push ebp
+ mov ebp, esp
+; push ebx ; unused
+; push ecx ; need not be preserved
+; push edx ; need not be preserved
+ push esi
+ push edi
+
+ mov ecx, JDIMENSION [width_blks(ebp)]
+ shl ecx, 3 ; imul ecx,DCTSIZE (ecx = output_cols)
+ jz near .return
+
+ mov edx, JDIMENSION [img_width(ebp)]
+
+ ; -- expand_right_edge
+
+ push ecx
+ shl ecx, 1 ; output_cols * 2
+ sub ecx, edx
+ jle short .expand_end
+
+ mov eax, INT [max_v_samp(ebp)]
+ test eax, eax
+ jle short .expand_end
+
+ cld
+ mov esi, JSAMPARRAY [input_data(ebp)] ; input_data
+ alignx 16, 7
+.expandloop:
+ push eax
+ push ecx
+
+ mov edi, JSAMPROW [esi]
+ add edi, edx
+ mov al, JSAMPLE [edi-1]
+
+ rep stosb
+
+ pop ecx
+ pop eax
+
+ add esi, byte SIZEOF_JSAMPROW
+ dec eax
+ jg short .expandloop
+
+.expand_end:
+ pop ecx ; output_cols
+
+ ; -- h2v1_downsample
+
+ mov eax, JDIMENSION [v_samp(ebp)] ; rowctr
+ test eax, eax
+ jle near .return
+
+ mov edx, 0x00010000 ; bias pattern
+ movd xmm7, edx
+ pcmpeqw xmm6, xmm6
+ pshufd xmm7, xmm7, 0x00 ; xmm7={0, 1, 0, 1, 0, 1, 0, 1}
+ psrlw xmm6, BYTE_BIT ; xmm6={0xFF 0x00 0xFF 0x00 ..}
+
+ mov esi, JSAMPARRAY [input_data(ebp)] ; input_data
+ mov edi, JSAMPARRAY [output_data(ebp)] ; output_data
+ alignx 16, 7
+.rowloop:
+ push ecx
+ push edi
+ push esi
+
+ mov esi, JSAMPROW [esi] ; inptr
+ mov edi, JSAMPROW [edi] ; outptr
+
+ cmp ecx, byte SIZEOF_XMMWORD
+ jae short .columnloop
+ alignx 16, 7
+
+.columnloop_r8:
+ movdqa xmm0, XMMWORD [esi+0*SIZEOF_XMMWORD]
+ pxor xmm1, xmm1
+ mov ecx, SIZEOF_XMMWORD
+ jmp short .downsample
+ alignx 16, 7
+
+.columnloop:
+ movdqa xmm0, XMMWORD [esi+0*SIZEOF_XMMWORD]
+ movdqa xmm1, XMMWORD [esi+1*SIZEOF_XMMWORD]
+
+.downsample:
+ movdqa xmm2, xmm0
+ movdqa xmm3, xmm1
+
+ pand xmm0, xmm6
+ psrlw xmm2, BYTE_BIT
+ pand xmm1, xmm6
+ psrlw xmm3, BYTE_BIT
+
+ paddw xmm0, xmm2
+ paddw xmm1, xmm3
+ paddw xmm0, xmm7
+ paddw xmm1, xmm7
+ psrlw xmm0, 1
+ psrlw xmm1, 1
+
+ packuswb xmm0, xmm1
+
+ movdqa XMMWORD [edi+0*SIZEOF_XMMWORD], xmm0
+
+ sub ecx, byte SIZEOF_XMMWORD ; outcol
+ add esi, byte 2*SIZEOF_XMMWORD ; inptr
+ add edi, byte 1*SIZEOF_XMMWORD ; outptr
+ cmp ecx, byte SIZEOF_XMMWORD
+ jae short .columnloop
+ test ecx, ecx
+ jnz short .columnloop_r8
+
+ pop esi
+ pop edi
+ pop ecx
+
+ add esi, byte SIZEOF_JSAMPROW ; input_data
+ add edi, byte SIZEOF_JSAMPROW ; output_data
+ dec eax ; rowctr
+ jg near .rowloop
+
+.return:
+ pop edi
+ pop esi
+; pop edx ; need not be preserved
+; pop ecx ; need not be preserved
+; pop ebx ; unused
+ pop ebp
+ ret
+
+; --------------------------------------------------------------------------
+;
+; Downsample pixel values of a single component.
+; This version handles the standard case of 2:1 horizontal and 2:1 vertical,
+; without smoothing.
+;
+; GLOBAL(void)
+; jsimd_h2v2_downsample_sse2(JDIMENSION image_width, int max_v_samp_factor,
+; JDIMENSION v_samp_factor,
+; JDIMENSION width_in_blocks, JSAMPARRAY input_data,
+; JSAMPARRAY output_data);
+;
+
+%define img_width(b) (b) + 8 ; JDIMENSION image_width
+%define max_v_samp(b) (b) + 12 ; int max_v_samp_factor
+%define v_samp(b) (b) + 16 ; JDIMENSION v_samp_factor
+%define width_blks(b) (b) + 20 ; JDIMENSION width_in_blocks
+%define input_data(b) (b) + 24 ; JSAMPARRAY input_data
+%define output_data(b) (b) + 28 ; JSAMPARRAY output_data
+
+ align 32
+ GLOBAL_FUNCTION(jsimd_h2v2_downsample_sse2)
+
+EXTN(jsimd_h2v2_downsample_sse2):
+ push ebp
+ mov ebp, esp
+; push ebx ; unused
+; push ecx ; need not be preserved
+; push edx ; need not be preserved
+ push esi
+ push edi
+
+ mov ecx, JDIMENSION [width_blks(ebp)]
+ shl ecx, 3 ; imul ecx,DCTSIZE (ecx = output_cols)
+ jz near .return
+
+ mov edx, JDIMENSION [img_width(ebp)]
+
+ ; -- expand_right_edge
+
+ push ecx
+ shl ecx, 1 ; output_cols * 2
+ sub ecx, edx
+ jle short .expand_end
+
+ mov eax, INT [max_v_samp(ebp)]
+ test eax, eax
+ jle short .expand_end
+
+ cld
+ mov esi, JSAMPARRAY [input_data(ebp)] ; input_data
+ alignx 16, 7
+.expandloop:
+ push eax
+ push ecx
+
+ mov edi, JSAMPROW [esi]
+ add edi, edx
+ mov al, JSAMPLE [edi-1]
+
+ rep stosb
+
+ pop ecx
+ pop eax
+
+ add esi, byte SIZEOF_JSAMPROW
+ dec eax
+ jg short .expandloop
+
+.expand_end:
+ pop ecx ; output_cols
+
+ ; -- h2v2_downsample
+
+ mov eax, JDIMENSION [v_samp(ebp)] ; rowctr
+ test eax, eax
+ jle near .return
+
+ mov edx, 0x00020001 ; bias pattern
+ movd xmm7, edx
+ pcmpeqw xmm6, xmm6
+ pshufd xmm7, xmm7, 0x00 ; xmm7={1, 2, 1, 2, 1, 2, 1, 2}
+ psrlw xmm6, BYTE_BIT ; xmm6={0xFF 0x00 0xFF 0x00 ..}
+
+ mov esi, JSAMPARRAY [input_data(ebp)] ; input_data
+ mov edi, JSAMPARRAY [output_data(ebp)] ; output_data
+ alignx 16, 7
+.rowloop:
+ push ecx
+ push edi
+ push esi
+
+ mov edx, JSAMPROW [esi+0*SIZEOF_JSAMPROW] ; inptr0
+ mov esi, JSAMPROW [esi+1*SIZEOF_JSAMPROW] ; inptr1
+ mov edi, JSAMPROW [edi] ; outptr
+
+ cmp ecx, byte SIZEOF_XMMWORD
+ jae short .columnloop
+ alignx 16, 7
+
+.columnloop_r8:
+ movdqa xmm0, XMMWORD [edx+0*SIZEOF_XMMWORD]
+ movdqa xmm1, XMMWORD [esi+0*SIZEOF_XMMWORD]
+ pxor xmm2, xmm2
+ pxor xmm3, xmm3
+ mov ecx, SIZEOF_XMMWORD
+ jmp short .downsample
+ alignx 16, 7
+
+.columnloop:
+ movdqa xmm0, XMMWORD [edx+0*SIZEOF_XMMWORD]
+ movdqa xmm1, XMMWORD [esi+0*SIZEOF_XMMWORD]
+ movdqa xmm2, XMMWORD [edx+1*SIZEOF_XMMWORD]
+ movdqa xmm3, XMMWORD [esi+1*SIZEOF_XMMWORD]
+
+.downsample:
+ movdqa xmm4, xmm0
+ movdqa xmm5, xmm1
+ pand xmm0, xmm6
+ psrlw xmm4, BYTE_BIT
+ pand xmm1, xmm6
+ psrlw xmm5, BYTE_BIT
+ paddw xmm0, xmm4
+ paddw xmm1, xmm5
+
+ movdqa xmm4, xmm2
+ movdqa xmm5, xmm3
+ pand xmm2, xmm6
+ psrlw xmm4, BYTE_BIT
+ pand xmm3, xmm6
+ psrlw xmm5, BYTE_BIT
+ paddw xmm2, xmm4
+ paddw xmm3, xmm5
+
+ paddw xmm0, xmm1
+ paddw xmm2, xmm3
+ paddw xmm0, xmm7
+ paddw xmm2, xmm7
+ psrlw xmm0, 2
+ psrlw xmm2, 2
+
+ packuswb xmm0, xmm2
+
+ movdqa XMMWORD [edi+0*SIZEOF_XMMWORD], xmm0
+
+ sub ecx, byte SIZEOF_XMMWORD ; outcol
+ add edx, byte 2*SIZEOF_XMMWORD ; inptr0
+ add esi, byte 2*SIZEOF_XMMWORD ; inptr1
+ add edi, byte 1*SIZEOF_XMMWORD ; outptr
+ cmp ecx, byte SIZEOF_XMMWORD
+ jae near .columnloop
+ test ecx, ecx
+ jnz near .columnloop_r8
+
+ pop esi
+ pop edi
+ pop ecx
+
+ add esi, byte 2*SIZEOF_JSAMPROW ; input_data
+ add edi, byte 1*SIZEOF_JSAMPROW ; output_data
+ dec eax ; rowctr
+ jg near .rowloop
+
+.return:
+ pop edi
+ pop esi
+; pop edx ; need not be preserved
+; pop ecx ; need not be preserved
+; 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
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