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/*
** Copyright 2015, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
.macro pixel dreg src f sR sG sB shift
/* extract red */
.if \shift < 32
dext $t0,\src,\shift+11,5
.else
dextu $t0,\src,\shift+11,5
.endif
mul $t0,$t0,\f
/* extract green */
.if \shift < 32
dext $t1,\src,\shift+5,6
.else
dextu $t1,\src,\shift+5,6
.endif
mul $t1,$t1,\f
/* extract blue */
.if \shift < 32
dext $t2,\src,\shift,5
.else
dextu $t2,\src,\shift,5
.endif
mul $t2,$t2,\f
srl $t0,$t0,8
srl $t1,$t1,8
srl $t2,$t2,8
addu $t0,$t0,\sR
addu $t1,$t1,\sG
addu \dreg,$t2,\sB
sll $t0,$t0,11
sll $t1,$t1,5
or \dreg,\dreg,$t0
or \dreg,\dreg,$t1
.endm
.text
.balign 4
.global scanline_col32cb16blend_mips64
.ent scanline_col32cb16blend_mips64
scanline_col32cb16blend_mips64:
/* check if count is zero */
srl $v0,$a1,24 /* sA */
beqz $a2,done
li $t0, 0x100
srl $v1,$v0,7
addu $v0,$v1,$v0
subu $v0,$t0,$v0 /* f */
ext $a3,$a1,3,5 /* sR */
ext $a4,$a1,10,6 /* sG */
ext $a5,$a1,19,5 /* sB */
/* check if cnt is at least 4 */
addiu $a2,$a2,-4
bltz $a2,tail
loop_4pixels:
ld $t3,0($a0)
daddiu $a0,$a0,8
addiu $a2,$a2,-4
pixel $a6 $t3 $v0 $a3 $a4 $a5 0
pixel $a7 $t3 $v0 $a3 $a4 $a5 16
pixel $t8 $t3 $v0 $a3 $a4 $a5 32
pixel $t9 $t3 $v0 $a3 $a4 $a5 48
dins $a6,$a7,16,16
dinsu $a6,$t8,32,16
dinsu $a6,$t9,48,16
sd $a6,-8($a0)
bgez $a2, loop_4pixels
tail:
/* the pixel count underran, restore it now */
addiu $a2,$a2,4
/* handle the last 0..3 pixels */
beqz $a2,done
loop_1pixel:
lhu $t3,0($a0)
daddiu $a0,$a0,2
addiu $a2,$a2,-1
pixel $a6 $t3 $v0 $a3 $a4 $a5 0
sh $a6, -2($a0)
bnez $a2,loop_1pixel
done:
j $ra
.end scanline_col32cb16blend_mips64
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