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 2 21 .arm 22 23 .global iterators0032 24 .type iterators0032, %function 25 26 /* 27 * iterators0032 28 * 29 * MUST BE CALLED FROM ARM CODE 30 * 31 * r0: const compute_iterators_t* (this) 32 * r0 + 0: m_dx01 33 * r0 + 4: m_dy10 34 * r0 + 8: m_dx20 35 * r0 +12: m_dy02 36 * r0 +16: m_x0 37 * r0 +20: m_y0 38 * r0 +24: m_area 39 * r0 +28: m_scale 40 * r0 +29: m_area_scale; 41 * r1: int32_t* (out) 42 * r1 + 0: c 43 * r1 + 4: dcdx 44 * r1 + 8: dcdy 45 * r2: c0 46 * r3: c1 47 * [sp]: c2 48 */ 49 50 iterators0032: 51 stmfd sp!, {r4, r5, r6, r7, r8, lr} 52 ldr r4, [sp, #4*6] 53 54 ldrb r12, [r0, #29] 55 sub r3, r3, r2 56 sub r4, r4, r2 57 sub r12, r12, #16 58 mov r3, r3, asr r12 59 mov r4, r4, asr r12 60 61 ldr r5, [r0, #0] 62 ldr r12, [r0, #4] 63 smull r8, lr, r4, r5 64 ldr r5, [r0, #8] 65 smull r6, r7, r4, r12 66 ldr r12, [r0, #12] 67 smlal r8, lr, r3, r5 68 smlal r6, r7, r3, r12 69 70 ldr r3, [r0, #16] // m_x0 71 ldr r4, [r0, #20] // m_x1 72 73 str r6, [r1, #4] 74 str r8, [r1, #8] 75 76 umull r6, r5, r3, r6 77 umull r8, r0, r4, r8 78 mla r7, r3, r7, r5 79 mla lr, r4, lr, r0 80 adds r6, r6, r8 81 adc r7, r7, lr 82 83 movs r6, r6, lsr #4 84 adc r6, r6, r7, lsl #28 85 rsb r6, r6, r2, lsl #16 86 str r6, [r1, #0] 87 88 ldmfd sp!, {r4, r5, r6, r7, r8, pc} 89 90
