;
; jcgrass2.asm - grayscale colorspace conversion (SSE2)
;
; x86 SIMD extension for IJG JPEG library
; Copyright (C) 1999-2006, MIYASAKA Masaru.
; Copyright (C) 2011, D. R. Commander.
; 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"

; --------------------------------------------------------------------------

%define SCALEBITS	16

F_0_114	equ	 7471			; FIX(0.11400)
F_0_250	equ	16384			; FIX(0.25000)
F_0_299	equ	19595			; FIX(0.29900)
F_0_587	equ	38470			; FIX(0.58700)
F_0_337	equ	(F_0_587 - F_0_250)	; FIX(0.58700) - FIX(0.25000)

; --------------------------------------------------------------------------
	SECTION	SEG_CONST

	alignz	16
	global	EXTN(jconst_rgb_gray_convert_sse2)

EXTN(jconst_rgb_gray_convert_sse2):

PW_F0299_F0337	times 4 dw  F_0_299, F_0_337
PW_F0114_F0250	times 4 dw  F_0_114, F_0_250
PD_ONEHALF	times 4 dd  (1 << (SCALEBITS-1))

	alignz	16

; --------------------------------------------------------------------------
	SECTION	SEG_TEXT
	BITS	32

%include "jcgryss2.asm"

%undef RGB_RED
%undef RGB_GREEN
%undef RGB_BLUE
%undef RGB_PIXELSIZE
%define RGB_RED EXT_RGB_RED
%define RGB_GREEN EXT_RGB_GREEN
%define RGB_BLUE EXT_RGB_BLUE
%define RGB_PIXELSIZE EXT_RGB_PIXELSIZE
%define jsimd_rgb_gray_convert_sse2 jsimd_extrgb_gray_convert_sse2
%include "jcgryss2.asm"

%undef RGB_RED
%undef RGB_GREEN
%undef RGB_BLUE
%undef RGB_PIXELSIZE
%define RGB_RED EXT_RGBX_RED
%define RGB_GREEN EXT_RGBX_GREEN
%define RGB_BLUE EXT_RGBX_BLUE
%define RGB_PIXELSIZE EXT_RGBX_PIXELSIZE
%define jsimd_rgb_gray_convert_sse2 jsimd_extrgbx_gray_convert_sse2
%include "jcgryss2.asm"

%undef RGB_RED
%undef RGB_GREEN
%undef RGB_BLUE
%undef RGB_PIXELSIZE
%define RGB_RED EXT_BGR_RED
%define RGB_GREEN EXT_BGR_GREEN
%define RGB_BLUE EXT_BGR_BLUE
%define RGB_PIXELSIZE EXT_BGR_PIXELSIZE
%define jsimd_rgb_gray_convert_sse2 jsimd_extbgr_gray_convert_sse2
%include "jcgryss2.asm"

%undef RGB_RED
%undef RGB_GREEN
%undef RGB_BLUE
%undef RGB_PIXELSIZE
%define RGB_RED EXT_BGRX_RED
%define RGB_GREEN EXT_BGRX_GREEN
%define RGB_BLUE EXT_BGRX_BLUE
%define RGB_PIXELSIZE EXT_BGRX_PIXELSIZE
%define jsimd_rgb_gray_convert_sse2 jsimd_extbgrx_gray_convert_sse2
%include "jcgryss2.asm"

%undef RGB_RED
%undef RGB_GREEN
%undef RGB_BLUE
%undef RGB_PIXELSIZE
%define RGB_RED EXT_XBGR_RED
%define RGB_GREEN EXT_XBGR_GREEN
%define RGB_BLUE EXT_XBGR_BLUE
%define RGB_PIXELSIZE EXT_XBGR_PIXELSIZE
%define jsimd_rgb_gray_convert_sse2 jsimd_extxbgr_gray_convert_sse2
%include "jcgryss2.asm"

%undef RGB_RED
%undef RGB_GREEN
%undef RGB_BLUE
%undef RGB_PIXELSIZE
%define RGB_RED EXT_XRGB_RED
%define RGB_GREEN EXT_XRGB_GREEN
%define RGB_BLUE EXT_XRGB_BLUE
%define RGB_PIXELSIZE EXT_XRGB_PIXELSIZE
%define jsimd_rgb_gray_convert_sse2 jsimd_extxrgb_gray_convert_sse2
%include "jcgryss2.asm"