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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
#if __mips==32 && __mips_isa_rev>=2
/* extract red */
ext $t4,\src,\shift+11,5
mul $t4,$t4,\f
/* extract green */
ext $t5,\src,\shift+5,6
mul $t5,$t5,\f
/* extract blue */
ext $t6,\src,\shift,5
mul $t6,$t6,\f
#else
/* extract red */
srl $t4,\src,\shift+11
andi $t4, 0x1f
mul $t4,$t4,\f
/* extract green */
srl $t5,\src,\shift+5
andi $t5, 0x3f
mul $t5,$t5,\f
/* extract blue */
srl $t6,\src,\shift
andi $t6, 0x1f
mul $t6,$t6,\f
#endif
srl $t4,$t4,8
srl $t5,$t5,8
srl $t6,$t6,8
addu $t4,$t4,\sR
addu $t5,$t5,\sG
addu \dreg,$t6,\sB
sll $t4,$t4,11
sll $t5,$t5,5
or \dreg,\dreg,$t4
or \dreg,\dreg,$t5
andi \dreg, 0xffff
.endm
.text
.align
.global scanline_col32cb16blend_mips
.ent scanline_col32cb16blend_mips
scanline_col32cb16blend_mips:
/* check if count is zero */
srl $v0,$a1,24 /* sA */
beqz $a2,done
li $t4, 0x100
srl $v1,$v0,7
addu $v0,$v1,$v0
subu $v0,$t4,$v0 /* f */
#if __mips==32 && __mips_isa_rev>=2
ext $a3,$a1,3,5 /* sR */
ext $t0,$a1,10,6 /* sG */
ext $t1,$a1,19,5 /* sB */
#else
srl $a3, $a1, 3
andi $a3, 0x1f /* sR */
srl $t0, $a1, 10
andi $t0, 0x3f /* sG */
srl $t1, $a1, 19
andi $t1, 0x1f /* sB */
#endif
/* check if cnt is at least 4 */
addiu $a2,$a2,-4
bltz $a2,tail
loop_4pixels:
lw $t7,0($a0)
lw $t8,4($a0)
addiu $a0,$a0,8
addiu $a2,$a2,-4
pixel $t2 $t7 $v0 $a3 $t0 $t1 0
pixel $t3 $t7 $v0 $a3 $t0 $t1 16
#if __mips==32 && __mips_isa_rev>=2
ins $t2,$t3,16,16
#else
sll $t3, 16
or $t2, $t2, $t3
#endif
pixel $t7 $t8 $v0 $a3 $t0 $t1 0
pixel $t3 $t8 $v0 $a3 $t0 $t1 16
#if __mips==32 && __mips_isa_rev>=2
ins $t7,$t3,16,16
#else
sll $t3, 16
or $t7, $t7, $t3
#endif
sw $t2,-8($a0)
sw $t7,-4($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 $t7,0($a0)
addiu $a0,$a0,2
addiu $a2,$a2,-1
pixel $t2 $t7 $v0 $a3 $t0 $t1 0
sh $t2, -2($a0)
bnez $a2,loop_1pixel
done:
j $ra
.end scanline_col32cb16blend_mips
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