2015-11-05 19:55:20 +01:00
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/*
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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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/* extract red */
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.if \shift < 32
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dext $t0,\src,\shift+11,5
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.else
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dextu $t0,\src,\shift+11,5
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.endif
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mul $t0,$t0,\f
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/* extract green */
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.if \shift < 32
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dext $t1,\src,\shift+5,6
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.else
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dextu $t1,\src,\shift+5,6
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.endif
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mul $t1,$t1,\f
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/* extract blue */
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.if \shift < 32
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dext $t2,\src,\shift,5
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.else
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dextu $t2,\src,\shift,5
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.endif
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mul $t2,$t2,\f
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srl $t0,$t0,8
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srl $t1,$t1,8
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srl $t2,$t2,8
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addu $t0,$t0,\sR
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addu $t1,$t1,\sG
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addu \dreg,$t2,\sB
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sll $t0,$t0,11
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sll $t1,$t1,5
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or \dreg,\dreg,$t0
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or \dreg,\dreg,$t1
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.endm
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.text
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2016-07-13 22:08:18 +02:00
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.balign 4
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2015-11-05 19:55:20 +01:00
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.global scanline_col32cb16blend_mips64
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.ent scanline_col32cb16blend_mips64
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scanline_col32cb16blend_mips64:
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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 $t0, 0x100
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srl $v1,$v0,7
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addu $v0,$v1,$v0
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subu $v0,$t0,$v0 /* f */
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ext $a3,$a1,3,5 /* sR */
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ext $a4,$a1,10,6 /* sG */
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ext $a5,$a1,19,5 /* sB */
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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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ld $t3,0($a0)
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daddiu $a0,$a0,8
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addiu $a2,$a2,-4
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pixel $a6 $t3 $v0 $a3 $a4 $a5 0
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pixel $a7 $t3 $v0 $a3 $a4 $a5 16
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pixel $t8 $t3 $v0 $a3 $a4 $a5 32
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pixel $t9 $t3 $v0 $a3 $a4 $a5 48
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dins $a6,$a7,16,16
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dinsu $a6,$t8,32,16
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dinsu $a6,$t9,48,16
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sd $a6,-8($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 $t3,0($a0)
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daddiu $a0,$a0,2
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addiu $a2,$a2,-1
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pixel $a6 $t3 $v0 $a3 $a4 $a5 0
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sh $a6, -2($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_mips64
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