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 49iterators0032: 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 89