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-rw-r--r--media/libjpeg/simd/i386/jcsample-mmx.asm324
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diff --git a/media/libjpeg/simd/i386/jcsample-mmx.asm b/media/libjpeg/simd/i386/jcsample-mmx.asm
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+;
+; jcsample.asm - downsampling (MMX)
+;
+; 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_mmx(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_mmx)
+
+EXTN(jsimd_h2v1_downsample_mmx):
+ 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 mm7, edx
+ pcmpeqw mm6, mm6
+ punpckldq mm7, mm7 ; mm7={0, 1, 0, 1}
+ psrlw mm6, BYTE_BIT ; mm6={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
+ alignx 16, 7
+.columnloop:
+
+ movq mm0, MMWORD [esi+0*SIZEOF_MMWORD]
+ movq mm1, MMWORD [esi+1*SIZEOF_MMWORD]
+ movq mm2, mm0
+ movq mm3, mm1
+
+ pand mm0, mm6
+ psrlw mm2, BYTE_BIT
+ pand mm1, mm6
+ psrlw mm3, BYTE_BIT
+
+ paddw mm0, mm2
+ paddw mm1, mm3
+ paddw mm0, mm7
+ paddw mm1, mm7
+ psrlw mm0, 1
+ psrlw mm1, 1
+
+ packuswb mm0, mm1
+
+ movq MMWORD [edi+0*SIZEOF_MMWORD], mm0
+
+ add esi, byte 2*SIZEOF_MMWORD ; inptr
+ add edi, byte 1*SIZEOF_MMWORD ; outptr
+ sub ecx, byte SIZEOF_MMWORD ; outcol
+ jnz short .columnloop
+
+ pop esi
+ pop edi
+ pop ecx
+
+ add esi, byte SIZEOF_JSAMPROW ; input_data
+ add edi, byte SIZEOF_JSAMPROW ; output_data
+ dec eax ; rowctr
+ jg short .rowloop
+
+ emms ; empty MMX state
+
+.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_mmx(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_mmx)
+
+EXTN(jsimd_h2v2_downsample_mmx):
+ 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 mm7, edx
+ pcmpeqw mm6, mm6
+ punpckldq mm7, mm7 ; mm7={1, 2, 1, 2}
+ psrlw mm6, BYTE_BIT ; mm6={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
+ alignx 16, 7
+.columnloop:
+
+ movq mm0, MMWORD [edx+0*SIZEOF_MMWORD]
+ movq mm1, MMWORD [esi+0*SIZEOF_MMWORD]
+ movq mm2, MMWORD [edx+1*SIZEOF_MMWORD]
+ movq mm3, MMWORD [esi+1*SIZEOF_MMWORD]
+
+ movq mm4, mm0
+ movq mm5, mm1
+ pand mm0, mm6
+ psrlw mm4, BYTE_BIT
+ pand mm1, mm6
+ psrlw mm5, BYTE_BIT
+ paddw mm0, mm4
+ paddw mm1, mm5
+
+ movq mm4, mm2
+ movq mm5, mm3
+ pand mm2, mm6
+ psrlw mm4, BYTE_BIT
+ pand mm3, mm6
+ psrlw mm5, BYTE_BIT
+ paddw mm2, mm4
+ paddw mm3, mm5
+
+ paddw mm0, mm1
+ paddw mm2, mm3
+ paddw mm0, mm7
+ paddw mm2, mm7
+ psrlw mm0, 2
+ psrlw mm2, 2
+
+ packuswb mm0, mm2
+
+ movq MMWORD [edi+0*SIZEOF_MMWORD], mm0
+
+ add edx, byte 2*SIZEOF_MMWORD ; inptr0
+ add esi, byte 2*SIZEOF_MMWORD ; inptr1
+ add edi, byte 1*SIZEOF_MMWORD ; outptr
+ sub ecx, byte SIZEOF_MMWORD ; outcol
+ jnz near .columnloop
+
+ 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
+
+ emms ; empty MMX state
+
+.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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