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 .code 32 23 .eabi_attribute 24, 1 @Tag_ABI_align_needed 24 .eabi_attribute 25, 1 @Tag_ABI_align_preserved 25 .text 26 .p2align 2 27 .global ixheaacd_shiftrountine_with_rnd 28 ixheaacd_shiftrountine_with_rnd: 29 STMFD sp!, {r4-r12, r14} 30 MOV r4, #0x1f 31 ADD r12, r2, r3, LSL #1 32 MOV r9, #0x8000 33 SUBS r3, r3, #1 34 BMI S_WITH_R_L6 35 36 S_WITH_R_L5: 37 LDR r5, [r1, r3, LSL #2] 38 LDR r7, [r0, r3, LSL #2] 39 LDR r14, [r0], #4 40 LDR r10, [r1], #4 41 42 ADD r6, r5, r7 43 SUB r5, r5, r7 44 ADD r7, r10, r14 45 SUB r4, r10, r14 46 47 48 49 50 51 52 53 54 55 56 57 MOVS r10, r4, ASR #0x15 58 CMNLT r10, #1 59 60 MOVLT r4, #0x80000000 61 MVNGT r4, #0x80000000 62 MOVEQ r4, r4, LSL #10 63 64 MOVS r10, r5, ASR #0x15 65 QADD r4, r4, r9 66 CMNLT r10, #1 67 MOV r4, r4, ASR #16 68 MOVLT r5, #0x80000000 69 MVNGT r5, #0x80000000 70 MOVEQ r5, r5, LSL #10 71 MOV r14, r3, lsl #1 72 73 74 MOVS r10, r6, ASR #0x15 75 QADD r5, r5, r9 76 CMNLT r10, #1 77 MOV r5, r5, ASR #16 78 MOVLT r6, #0x80000000 79 80 STRH r5, [r2, r14] 81 MVNGT r6, #0x80000000 82 MOVEQ r6, r6, LSL #10 83 84 MOVS r10, r7, ASR #0x15 85 QADD r6, r6, r9 86 CMNLT r10, #1 87 MOV r6, r6, ASR #16 88 MOVLT r7, #0x80000000 89 MVNGT r7, #0x80000000 90 MOVEQ r7, r7, LSL #10 91 92 QADD r7, r7, r9 93 STRH r4, [r2], #2 94 95 MOV r7, r7, ASR #16 96 97 98 STRH r7, [r12, r14] 99 SUBS r3, r3, #2 100 STRH r6, [r12], #2 101 BGE S_WITH_R_L5 102 S_WITH_R_L6: 103 LDMFD sp!, {r4-r12, r15} 104 105 106 107 108 109 110 111 112
