| bigbiff | 673c7ae | 2020-12-02 19:44:56 -0500 | [diff] [blame] | 1 | /* |
| 2 | ** Copyright 2015, The Android Open Source Project |
| 3 | ** |
| 4 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | ** you may not use this file except in compliance with the License. |
| 6 | ** You may obtain a copy of the License at |
| 7 | ** |
| 8 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | ** |
| 10 | ** Unless required by applicable law or agreed to in writing, software |
| 11 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | ** See the License for the specific language governing permissions and |
| 14 | ** limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | .macro pixel dreg src f sR sG sB shift |
| 18 | |
| 19 | #if __mips==32 && __mips_isa_rev>=2 |
| 20 | /* extract red */ |
| 21 | ext $t4,\src,\shift+11,5 |
| 22 | mul $t4,$t4,\f |
| 23 | |
| 24 | /* extract green */ |
| 25 | ext $t5,\src,\shift+5,6 |
| 26 | mul $t5,$t5,\f |
| 27 | |
| 28 | /* extract blue */ |
| 29 | ext $t6,\src,\shift,5 |
| 30 | mul $t6,$t6,\f |
| 31 | #else |
| 32 | /* extract red */ |
| 33 | srl $t4,\src,\shift+11 |
| 34 | andi $t4, 0x1f |
| 35 | mul $t4,$t4,\f |
| 36 | |
| 37 | /* extract green */ |
| 38 | srl $t5,\src,\shift+5 |
| 39 | andi $t5, 0x3f |
| 40 | mul $t5,$t5,\f |
| 41 | |
| 42 | /* extract blue */ |
| 43 | srl $t6,\src,\shift |
| 44 | andi $t6, 0x1f |
| 45 | mul $t6,$t6,\f |
| 46 | #endif |
| 47 | |
| 48 | srl $t4,$t4,8 |
| 49 | srl $t5,$t5,8 |
| 50 | srl $t6,$t6,8 |
| 51 | addu $t4,$t4,\sR |
| 52 | addu $t5,$t5,\sG |
| 53 | addu \dreg,$t6,\sB |
| 54 | sll $t4,$t4,11 |
| 55 | sll $t5,$t5,5 |
| 56 | or \dreg,\dreg,$t4 |
| 57 | or \dreg,\dreg,$t5 |
| 58 | andi \dreg, 0xffff |
| 59 | .endm |
| 60 | |
| 61 | .text |
| 62 | .balign 4 |
| 63 | |
| 64 | .global scanline_col32cb16blend_mips |
| 65 | .ent scanline_col32cb16blend_mips |
| 66 | scanline_col32cb16blend_mips: |
| 67 | |
| 68 | /* check if count is zero */ |
| 69 | srl $v0,$a1,24 /* sA */ |
| 70 | beqz $a2,done |
| 71 | li $t4, 0x100 |
| 72 | srl $v1,$v0,7 |
| 73 | addu $v0,$v1,$v0 |
| 74 | subu $v0,$t4,$v0 /* f */ |
| 75 | #if __mips==32 && __mips_isa_rev>=2 |
| 76 | ext $a3,$a1,3,5 /* sR */ |
| 77 | ext $t0,$a1,10,6 /* sG */ |
| 78 | ext $t1,$a1,19,5 /* sB */ |
| 79 | #else |
| 80 | srl $a3, $a1, 3 |
| 81 | andi $a3, 0x1f /* sR */ |
| 82 | srl $t0, $a1, 10 |
| 83 | andi $t0, 0x3f /* sG */ |
| 84 | srl $t1, $a1, 19 |
| 85 | andi $t1, 0x1f /* sB */ |
| 86 | #endif |
| 87 | |
| 88 | /* check if cnt is at least 4 */ |
| 89 | addiu $a2,$a2,-4 |
| 90 | bltz $a2,tail |
| 91 | |
| 92 | loop_4pixels: |
| 93 | lw $t7,0($a0) |
| 94 | lw $t8,4($a0) |
| 95 | addiu $a0,$a0,8 |
| 96 | addiu $a2,$a2,-4 |
| 97 | pixel $t2 $t7 $v0 $a3 $t0 $t1 0 |
| 98 | pixel $t3 $t7 $v0 $a3 $t0 $t1 16 |
| 99 | #if __mips==32 && __mips_isa_rev>=2 |
| 100 | ins $t2,$t3,16,16 |
| 101 | #else |
| 102 | sll $t3, 16 |
| 103 | or $t2, $t2, $t3 |
| 104 | #endif |
| 105 | pixel $t7 $t8 $v0 $a3 $t0 $t1 0 |
| 106 | pixel $t3 $t8 $v0 $a3 $t0 $t1 16 |
| 107 | #if __mips==32 && __mips_isa_rev>=2 |
| 108 | ins $t7,$t3,16,16 |
| 109 | #else |
| 110 | sll $t3, 16 |
| 111 | or $t7, $t7, $t3 |
| 112 | #endif |
| 113 | sw $t2,-8($a0) |
| 114 | sw $t7,-4($a0) |
| 115 | bgez $a2, loop_4pixels |
| 116 | |
| 117 | tail: |
| 118 | /* the pixel count underran, restore it now */ |
| 119 | addiu $a2,$a2,4 |
| 120 | |
| 121 | /* handle the last 0..3 pixels */ |
| 122 | beqz $a2,done |
| 123 | |
| 124 | loop_1pixel: |
| 125 | lhu $t7,0($a0) |
| 126 | addiu $a0,$a0,2 |
| 127 | addiu $a2,$a2,-1 |
| 128 | pixel $t2 $t7 $v0 $a3 $t0 $t1 0 |
| 129 | sh $t2, -2($a0) |
| 130 | bnez $a2,loop_1pixel |
| 131 | |
| 132 | done: |
| 133 | j $ra |
| 134 | .end scanline_col32cb16blend_mips |