You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
273 lines
5.4 KiB
273 lines
5.4 KiB
/* libs/pixelflinger/t32cb16blend.S |
|
** |
|
** Copyright 2010, 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. |
|
*/ |
|
|
|
#ifdef DEBUG |
|
#define DBG |
|
#else |
|
#define DBG # |
|
#endif |
|
|
|
/* |
|
* blend one of 2 16bpp RGB pixels held in dreg selected by shift |
|
* with the 32bpp ABGR pixel held in src and store the result in fb |
|
* |
|
* Assumes that the dreg data is little endian and that |
|
* the the second pixel (shift==16) will be merged into |
|
* the fb result |
|
* |
|
* Uses $t0,$t6,$t7,$t8 |
|
*/ |
|
|
|
#if __mips==32 && __mips_isa_rev>=2 |
|
.macro pixel dreg src fb shift |
|
/* |
|
* sA = s >> 24 |
|
* f = 0x100 - (sA + (sA>>7)) |
|
*/ |
|
DBG .set noat |
|
DBG rdhwr $at,$2 |
|
DBG .set at |
|
|
|
srl $t7,\src,24 |
|
srl $t6,$t7,7 |
|
addu $t7,$t6 |
|
li $t6,0x100 |
|
subu $t7,$t6,$t7 |
|
|
|
/* red */ |
|
ext $t8,\dreg,\shift+6+5,5 # dst[\shift:15..11] |
|
mul $t6,$t8,$t7 |
|
ext $t0,\dreg,\shift+5,6 # start green extraction dst[\shift:10..5] |
|
ext $t8,\src,3,5 # src[7..3] |
|
srl $t6,8 |
|
addu $t8,$t6 |
|
.if \shift!=0 |
|
sll $t8,\shift+11 |
|
or \fb,$t8 |
|
.else |
|
sll \fb,$t8,11 |
|
.endif |
|
|
|
/* green */ |
|
mul $t8,$t0,$t7 |
|
ext $t0,\dreg,\shift,5 # start blue extraction dst[\shift:4..0] |
|
ext $t6,\src,2+8,6 # src[15..10] |
|
srl $t8,8 |
|
addu $t8,$t6 |
|
|
|
/* blue */ |
|
mul $t0,$t0,$t7 |
|
sll $t8, $t8, \shift+5 |
|
or \fb, \fb, $t8 |
|
ext $t6,\src,(3+8+8),5 |
|
srl $t8,$t0,8 |
|
addu $t8,$t6 |
|
sll $t8, $t8, \shift |
|
or \fb, \fb, $t8 |
|
|
|
DBG .set noat |
|
DBG rdhwr $t8,$2 |
|
DBG subu $t8,$at |
|
DBG sltu $at,$t8,$v0 |
|
DBG movn $v0,$t8,$at |
|
DBG sgtu $at,$t8,$v1 |
|
DBG movn $v1,$t8,$at |
|
DBG .set at |
|
.endm |
|
|
|
#else |
|
|
|
.macro pixel dreg src fb shift |
|
/* |
|
* sA = s >> 24 |
|
* f = 0x100 - (sA + (sA>>7)) |
|
*/ |
|
DBG .set push |
|
DBG .set noat |
|
DBG .set mips32r2 |
|
DBG rdhwr $at,$2 |
|
DBG .set pop |
|
|
|
srl $t7,\src,24 |
|
srl $t6,$t7,7 |
|
addu $t7,$t6 |
|
li $t6,0x100 |
|
subu $t7,$t6,$t7 |
|
|
|
/* |
|
* red |
|
* dR = (d >> (6 + 5)) & 0x1f; |
|
* dR = (f*dR)>>8 |
|
* sR = (s >> ( 3)) & 0x1f; |
|
* sR += dR |
|
* fb |= sR << 11 |
|
*/ |
|
srl $t8,\dreg,\shift+6+5 |
|
.if \shift==0 |
|
and $t8,0x1f |
|
.endif |
|
mul $t8,$t8,$t7 |
|
srl $t6,\src,3 |
|
and $t6,0x1f |
|
srl $t8,8 |
|
addu $t8,$t6 |
|
.if \shift!=0 |
|
sll $t8,\shift+11 |
|
or \fb,$t8 |
|
.else |
|
sll \fb,$t8,11 |
|
.endif |
|
|
|
/* |
|
* green |
|
* dG = (d >> 5) & 0x3f |
|
* dG = (f*dG) >> 8 |
|
* sG = (s >> ( 8+2))&0x3F; |
|
*/ |
|
srl $t8,\dreg,\shift+5 |
|
and $t8,0x3f |
|
mul $t8,$t8,$t7 |
|
srl $t6,\src,8+2 |
|
and $t6,0x3f |
|
srl $t8,8 |
|
addu $t8,$t6 |
|
sll $t8,\shift + 5 |
|
or \fb,$t8 |
|
|
|
/* blue */ |
|
.if \shift!=0 |
|
srl $t8,\dreg,\shift |
|
and $t8,0x1f |
|
.else |
|
and $t8,\dreg,0x1f |
|
.endif |
|
mul $t8,$t8,$t7 |
|
srl $t6,\src,(8+8+3) |
|
and $t6,0x1f |
|
srl $t8,8 |
|
addu $t8,$t6 |
|
.if \shift!=0 |
|
sll $t8,\shift |
|
.endif |
|
or \fb,$t8 |
|
DBG .set push |
|
DBG .set noat |
|
DBG .set mips32r2 |
|
DBG rdhwr $t8,$2 |
|
DBG subu $t8,$at |
|
DBG sltu $at,$t8,$v0 |
|
DBG movn $v0,$t8,$at |
|
DBG sgtu $at,$t8,$v1 |
|
DBG movn $v1,$t8,$at |
|
DBG .set pop |
|
.endm |
|
#endif |
|
|
|
.text |
|
.balign 4 |
|
|
|
.global scanline_t32cb16blend_mips |
|
.ent scanline_t32cb16blend_mips |
|
scanline_t32cb16blend_mips: |
|
DBG li $v0,0xffffffff |
|
DBG li $v1,0 |
|
/* Align the destination if necessary */ |
|
and $t0,$a0,3 |
|
beqz $t0,aligned |
|
|
|
/* as long as there is at least one pixel */ |
|
beqz $a2,done |
|
|
|
lw $t4,($a1) |
|
addu $a0,2 |
|
addu $a1,4 |
|
beqz $t4,1f |
|
lhu $t3,-2($a0) |
|
pixel $t3,$t4,$t1,0 |
|
sh $t1,-2($a0) |
|
1: subu $a2,1 |
|
|
|
aligned: |
|
/* Check to see if its worth unrolling the loop */ |
|
subu $a2,4 |
|
bltz $a2,tail |
|
|
|
/* Process 4 pixels at a time */ |
|
fourpixels: |
|
/* 1st pair of pixels */ |
|
lw $t4,0($a1) |
|
lw $t5,4($a1) |
|
addu $a0,8 |
|
addu $a1,16 |
|
|
|
/* both are zero, skip this pair */ |
|
or $t3,$t4,$t5 |
|
beqz $t3,1f |
|
|
|
/* load the destination */ |
|
lw $t3,-8($a0) |
|
|
|
pixel $t3,$t4,$t1,0 |
|
andi $t1, 0xFFFF |
|
pixel $t3,$t5,$t1,16 |
|
sw $t1,-8($a0) |
|
|
|
1: |
|
/* 2nd pair of pixels */ |
|
lw $t4,-8($a1) |
|
lw $t5,-4($a1) |
|
|
|
/* both are zero, skip this pair */ |
|
or $t3,$t4,$t5 |
|
beqz $t3,1f |
|
|
|
/* load the destination */ |
|
lw $t3,-4($a0) |
|
|
|
pixel $t3,$t4,$t1,0 |
|
andi $t1, 0xFFFF |
|
pixel $t3,$t5,$t1,16 |
|
sw $t1,-4($a0) |
|
|
|
1: subu $a2,4 |
|
bgtz $a2,fourpixels |
|
|
|
tail: |
|
/* the pixel count underran, restore it now */ |
|
addu $a2,4 |
|
|
|
/* handle the last 0..3 pixels */ |
|
beqz $a2,done |
|
onepixel: |
|
lw $t4,($a1) |
|
addu $a0,2 |
|
addu $a1,4 |
|
beqz $t4,1f |
|
lhu $t3,-2($a0) |
|
pixel $t3,$t4,$t1,0 |
|
sh $t1,-2($a0) |
|
1: subu $a2,1 |
|
bnez $a2,onepixel |
|
done: |
|
DBG .set push |
|
DBG .set mips32r2 |
|
DBG rdhwr $a0,$3 |
|
DBG mul $v0,$a0 |
|
DBG mul $v1,$a0 |
|
DBG .set pop |
|
j $ra |
|
.end scanline_t32cb16blend_mips
|
|
|