| The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* libs/opengles/iterators.S |
| 2 | ** |
| 3 | ** Copyright 2006, The Android Open Source Project |
| 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | |
| 19 | .text |
| 20 | .align |
| 21 | .arm |
| 22 | |
| 23 | .global iterators0032 |
| 24 | |
| 25 | /* |
| 26 | * iterators0032 |
| 27 | * |
| 28 | * MUST BE CALLED FROM ARM CODE |
| 29 | * |
| 30 | * r0: const compute_iterators_t* (this) |
| 31 | * r0 + 0: m_dx01 |
| 32 | * r0 + 4: m_dy10 |
| 33 | * r0 + 8: m_dx20 |
| 34 | * r0 +12: m_dy02 |
| 35 | * r0 +16: m_x0 |
| 36 | * r0 +20: m_y0 |
| 37 | * r0 +24: m_area |
| 38 | * r0 +28: m_scale |
| 39 | * r0 +29: m_area_scale; |
| 40 | * r1: int32_t* (out) |
| 41 | * r1 + 0: c |
| 42 | * r1 + 4: dcdx |
| 43 | * r1 + 8: dcdy |
| 44 | * r2: c0 |
| 45 | * r3: c1 |
| 46 | * [sp]: c2 |
| 47 | */ |
| 48 | |
| 49 | iterators0032: |
| 50 | stmfd sp!, {r4, r5, r6, r7, r8, lr} |
| 51 | ldr r4, [sp, #4*6] |
| 52 | |
| 53 | ldrb r12, [r0, #29] |
| 54 | sub r3, r3, r2 |
| 55 | sub r4, r4, r2 |
| 56 | sub r12, r12, #16 |
| 57 | mov r3, r3, asr r12 |
| 58 | mov r4, r4, asr r12 |
| 59 | |
| 60 | ldr r5, [r0, #0] |
| 61 | ldr r12, [r0, #4] |
| 62 | smull r8, lr, r4, r5 |
| 63 | ldr r5, [r0, #8] |
| 64 | smull r6, r7, r4, r12 |
| 65 | ldr r12, [r0, #12] |
| 66 | smlal r8, lr, r3, r5 |
| 67 | smlal r6, r7, r3, r12 |
| 68 | |
| 69 | ldr r3, [r0, #16] // m_x0 |
| 70 | ldr r4, [r0, #20] // m_x1 |
| 71 | |
| 72 | str r6, [r1, #4] |
| 73 | str r8, [r1, #8] |
| 74 | |
| 75 | umull r6, r5, r3, r6 |
| 76 | umull r8, r0, r4, r8 |
| 77 | mla r7, r3, r7, r5 |
| 78 | mla lr, r4, lr, r0 |
| 79 | adds r6, r6, r8 |
| 80 | adc r7, r7, lr |
| 81 | |
| 82 | movs r6, r6, lsr #4 |
| 83 | adc r6, r6, r7, lsl #28 |
| 84 | rsb r6, r6, r2, lsl #16 |
| 85 | str r6, [r1, #0] |
| 86 | |
| 87 | ldmfd sp!, {r4, r5, r6, r7, r8, pc} |
| 88 | |