134 lines
3.3 KiB
ArmAsm
134 lines
3.3 KiB
ArmAsm
/*
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** Copyright 2015, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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.macro pixel dreg src f sR sG sB shift
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#if __mips==32 && __mips_isa_rev>=2
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/* extract red */
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ext $t4,\src,\shift+11,5
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mul $t4,$t4,\f
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/* extract green */
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ext $t5,\src,\shift+5,6
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mul $t5,$t5,\f
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/* extract blue */
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ext $t6,\src,\shift,5
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mul $t6,$t6,\f
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#else
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/* extract red */
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srl $t4,\src,\shift+11
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andi $t4, 0x1f
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mul $t4,$t4,\f
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/* extract green */
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srl $t5,\src,\shift+5
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andi $t5, 0x3f
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mul $t5,$t5,\f
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/* extract blue */
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srl $t6,\src,\shift
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andi $t6, 0x1f
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mul $t6,$t6,\f
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#endif
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srl $t4,$t4,8
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srl $t5,$t5,8
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srl $t6,$t6,8
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addu $t4,$t4,\sR
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addu $t5,$t5,\sG
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addu \dreg,$t6,\sB
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sll $t4,$t4,11
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sll $t5,$t5,5
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or \dreg,\dreg,$t4
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or \dreg,\dreg,$t5
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andi \dreg, 0xffff
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.endm
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.text
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.align
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.global scanline_col32cb16blend_mips
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.ent scanline_col32cb16blend_mips
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scanline_col32cb16blend_mips:
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/* check if count is zero */
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srl $v0,$a1,24 /* sA */
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beqz $a2,done
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li $t4, 0x100
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srl $v1,$v0,7
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addu $v0,$v1,$v0
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subu $v0,$t4,$v0 /* f */
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#if __mips==32 && __mips_isa_rev>=2
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ext $a3,$a1,3,5 /* sR */
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ext $t0,$a1,10,6 /* sG */
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ext $t1,$a1,19,5 /* sB */
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#else
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srl $a3, $a1, 3
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andi $a3, 0x1f /* sR */
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srl $t0, $a1, 10
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andi $t0, 0x3f /* sG */
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srl $t1, $a1, 19
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andi $t1, 0x1f /* sB */
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#endif
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/* check if cnt is at least 4 */
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addiu $a2,$a2,-4
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bltz $a2,tail
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loop_4pixels:
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lw $t7,0($a0)
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lw $t8,4($a0)
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addiu $a0,$a0,8
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addiu $a2,$a2,-4
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pixel $t2 $t7 $v0 $a3 $t0 $t1 0
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pixel $t3 $t7 $v0 $a3 $t0 $t1 16
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#if __mips==32 && __mips_isa_rev>=2
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ins $t2,$t3,16,16
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#else
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sll $t3, 16
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or $t2, $t2, $t3
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#endif
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pixel $t7 $t8 $v0 $a3 $t0 $t1 0
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pixel $t3 $t8 $v0 $a3 $t0 $t1 16
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#if __mips==32 && __mips_isa_rev>=2
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ins $t7,$t3,16,16
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#else
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sll $t3, 16
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or $t7, $t7, $t3
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#endif
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sw $t2,-8($a0)
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sw $t7,-4($a0)
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bgez $a2, loop_4pixels
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tail:
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/* the pixel count underran, restore it now */
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addiu $a2,$a2,4
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/* handle the last 0..3 pixels */
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beqz $a2,done
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loop_1pixel:
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lhu $t7,0($a0)
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addiu $a0,$a0,2
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addiu $a2,$a2,-1
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pixel $t2 $t7 $v0 $a3 $t0 $t1 0
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sh $t2, -2($a0)
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bnez $a2,loop_1pixel
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done:
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j $ra
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.end scanline_col32cb16blend_mips
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