1 @/****************************************************************************** 2 @ * 3 @ * Copyright (C) 2018 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 @ * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore 19 @*/ 20 21 22 .text 23 .p2align 2 24 .global ixheaacd_scale_factor_process_armv7 25 26 ixheaacd_scale_factor_process_armv7: 27 28 29 30 31 STMFD sp!, {r4-r12, r14} 32 LDR r9, [sp, #0x28] 33 LDR r11, [sp, #0x2c] 34 35 CMP r2, #0 36 37 BLE END 38 MOV r10, #0 39 CMP r11, #2 40 MOVLE r11, #0x25 41 MOVGT r11, #0x22 42 43 TBANDS_LOOP: 44 45 LDRSH r5, [r1], #2 46 LDRB r4, [r3], #1 47 48 LDR r6, [sp, #0x30] 49 LDR r7, [sp, #0x34] 50 51 CMP r5, #0x18 52 BGE SCALE_FACTOR_GE_12 53 54 CMP r4, #0 55 BLE OFFSET_ZERO 56 57 SCALE_FACTOR_LT_12: 58 59 STR r10, [r0], #4 60 STR r10, [r0], #4 61 STR r10, [r0], #4 62 STR r10, [r0], #4 63 SUBS r4, r4, #4 64 BGT SCALE_FACTOR_LT_12 65 B OFFSET_ZERO 66 67 SCALE_FACTOR_GE_12: 68 69 SUBS r6, r11, r5, ASR #2 70 71 72 AND r5, r5, #3 73 74 75 LDR r5, [r9, r5, LSL #2] 76 77 BLE SHIFT_LE_ZERO 78 79 SUB r14, r6, #1 80 81 SHIFT_POSITIVE: 82 LDRD r6, [r0, #0] 83 84 SMULWB r6, r6, r5 85 SMULWB r7, r7, r5 86 87 MOV r6, r6, ASR r14 88 MOV r7, r7, ASR r14 89 90 STRD r6, [r0], #8 91 92 LDRD r6, [r0, #0] 93 94 SMULWB r6, r6, r5 95 SMULWB r7, r7, r5 96 SUBS r4, r4, #4 97 98 MOV r6, r6, ASR r14 99 MOV r7, r7, ASR r14 100 101 STRD r6, [r0], #8 102 103 BGT SHIFT_POSITIVE 104 B OFFSET_ZERO 105 SHIFT_LE_ZERO: 106 107 RSBS r14, r6, #0 108 BGT SHIFT_NEGTIVE1 109 110 SHIFT_ZERO: 111 LDRD r6, [r0, #0] 112 113 SMULWB r6, r6, r5 114 SMULWB r7, r7, r5 115 MOV r6, r6, LSL #1 116 MOV r7, r7, LSL #1 117 118 STRD r6, [r0], #8 119 120 SUBS r4, r4, #2 121 122 BGT SHIFT_ZERO 123 B OFFSET_ZERO 124 125 SHIFT_NEGTIVE1: 126 SUB r14, r14, #1 127 SHIFT_NEGTIVE: 128 LDRD r6, [r0, #0] 129 MOV r6, r6, LSL r14 130 MOV r7, r7, LSL r14 131 132 SMULWB r6, r6, r5 133 SMULWB r7, r7, r5 134 MOV r6, r6, LSL #2 135 MOV r7, r7, LSL #2 136 137 STRD r6, [r0], #8 138 139 SUBS r4, r4, #2 140 141 BGT SHIFT_NEGTIVE 142 143 OFFSET_ZERO: 144 SUBS r2, r2, #1 145 BGT TBANDS_LOOP 146 END: 147 LDMFD sp!, {r4-r12, r15} 148
