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; Copyright (c) 2011 The Chromium Authors. All rights reserved.
; Use of this source code is governed by a BSD-style license that can be
; found in the LICENSE file.
global mangle(SYMBOL) PRIVATE
align function_align
; Non-PIC code is the fastest so use this if possible.
%ifndef PIC
mangle(SYMBOL):
%assign stack_offset 0
PROLOGUE 5, 7, 3, Y, U, V, ARGB, WIDTH, TEMPU, TEMPV
extern mangle(kCoefficientsRgbY)
jmp .convertend
.convertloop:
movzx TEMPUd, BYTE [Uq]
add Uq, 1
movzx TEMPVd, BYTE [Vq]
add Vq, 1
movq mm0, [mangle(kCoefficientsRgbY) + 2048 + 8 * TEMPUq]
movzx TEMPUd, BYTE [Yq]
paddsw mm0, [mangle(kCoefficientsRgbY) + 4096 + 8 * TEMPVq]
movzx TEMPVd, BYTE [Yq + 1]
movq mm1, [mangle(kCoefficientsRgbY) + 8 * TEMPUq]
add Yq, 2
movq mm2, [mangle(kCoefficientsRgbY) + 8 * TEMPVq]
paddsw mm1, mm0
paddsw mm2, mm0
psraw mm1, 6
psraw mm2, 6
packuswb mm1, mm2
MOVQ [ARGBq], mm1
add ARGBq, 8
.convertend:
sub WIDTHq, 2
jns .convertloop
; If number of pixels is odd then compute it.
and WIDTHq, 1
jz .convertdone
movzx TEMPUd, BYTE [Uq]
movq mm0, [mangle(kCoefficientsRgbY) + 2048 + 8 * TEMPUq]
movzx TEMPVd, BYTE [Vq]
paddsw mm0, [mangle(kCoefficientsRgbY) + 4096 + 8 * TEMPVq]
movzx TEMPUd, BYTE [Yq]
movq mm1, [mangle(kCoefficientsRgbY) + 8 * TEMPUq]
paddsw mm1, mm0
psraw mm1, 6
packuswb mm1, mm1
movd [ARGBq], mm1
.convertdone:
RET
%endif
; With PIC code we need to load the address of mangle(kCoefficientsRgbY).
; This code is slower than the above version.
%ifdef PIC
mangle(SYMBOL):
%assign stack_offset 0
PROLOGUE 5, 7, 3, Y, U, V, ARGB, WIDTH, TEMP, TABLE
extern mangle(kCoefficientsRgbY)
LOAD_SYM TABLEq, mangle(kCoefficientsRgbY)
jmp .convertend
.convertloop:
movzx TEMPd, BYTE [Uq]
movq mm0, [TABLEq + 2048 + 8 * TEMPq]
add Uq, 1
movzx TEMPd, BYTE [Vq]
paddsw mm0, [TABLEq + 4096 + 8 * TEMPq]
add Vq, 1
movzx TEMPd, BYTE [Yq]
movq mm1, [TABLEq + 8 * TEMPq]
movzx TEMPd, BYTE [Yq + 1]
movq mm2, [TABLEq + 8 * TEMPq]
add Yq, 2
; Add UV components to Y component.
paddsw mm1, mm0
paddsw mm2, mm0
; Down shift and then pack.
psraw mm1, 6
psraw mm2, 6
packuswb mm1, mm2
MOVQ [ARGBq], mm1
add ARGBq, 8
.convertend:
sub WIDTHq, 2
jns .convertloop
; If number of pixels is odd then compute it.
and WIDTHq, 1
jz .convertdone
movzx TEMPd, BYTE [Uq]
movq mm0, [TABLEq + 2048 + 8 * TEMPq]
movzx TEMPd, BYTE [Vq]
paddsw mm0, [TABLEq + 4096 + 8 * TEMPq]
movzx TEMPd, BYTE [Yq]
movq mm1, [TABLEq + 8 * TEMPq]
paddsw mm1, mm0
psraw mm1, 6
packuswb mm1, mm1
movd [ARGBq], mm1
.convertdone:
RET
%endif
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