1 @/* 2 @ ** Copyright 2003-2010, VisualOn, Inc. 3 @ ** 4 @ ** Licensed under the Apache License, Version 2.0 (the "License"); 5 @ ** you may not use this file except in compliance with the License. 6 @ ** You may obtain a copy of the License at 7 @ ** 8 @ ** http://www.apache.org/licenses/LICENSE-2.0 9 @ ** 10 @ ** Unless required by applicable law or agreed to in writing, software 11 @ ** distributed under the License is distributed on an "AS IS" BASIS, 12 @ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 @ ** See the License for the specific language governing permissions and 14 @ ** limitations under the License. 15 @ */ 16 17 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 18 @ File: PrePostMDCT_v5.s 19 @ 20 @ Content: premdct and postmdct function armv5 assemble 21 @ 22 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 23 24 .section .text 25 .global PreMDCT 26 27 PreMDCT: 28 stmdb sp!, {r4 - r11, lr} 29 30 add r9, r0, r1, lsl #2 31 sub r3, r9, #8 32 33 movs r1, r1, asr #2 34 beq PreMDCT_END 35 36 PreMDCT_LOOP: 37 ldr r8, [r2], #4 38 ldr r9, [r2], #4 39 40 ldrd r4, [r0] 41 ldrd r6, [r3] 42 43 smull r14, r11, r4, r8 @ MULHIGH(tr1, cosa) 44 smull r10, r12, r7, r8 @ MULHIGH(ti1, cosa) 45 46 smull r14, r8, r7, r9 @ MULHIGH(ti1, sina) 47 smull r7, r10, r4, r9 @ MULHIGH(tr1, sina) 48 49 add r11, r11, r8 @ MULHIGH(cosa, tr1) + MULHIGH(sina, ti1)@ 50 sub r7, r12, r10 @ MULHIGH(ti1, cosa) - MULHIGH(tr1, sina) 51 52 ldr r8, [r2], #4 53 ldr r9, [r2], #4 54 55 smull r14, r4, r6, r8 @ MULHIGH(tr2, cosa) 56 smull r10, r12, r5, r8 @ MULHIGH(ti2, cosa) 57 58 smull r14, r8, r5, r9 @ MULHIGH(ti2, sina) 59 smull r5, r10, r6, r9 @ MULHIGH(tr2, sina) 60 61 add r8, r8, r4 62 sub r9, r12, r10 63 64 mov r6, r11 65 66 strd r6, [r0] 67 strd r8, [r3] 68 69 subs r1, r1, #1 70 sub r3, r3, #8 71 add r0, r0, #8 72 bne PreMDCT_LOOP 73 74 PreMDCT_END: 75 ldmia sp!, {r4 - r11, pc} 76 @ENDP @ |PreMDCT| 77 78 .section .text 79 .global PostMDCT 80 81 PostMDCT: 82 stmdb sp!, {r4 - r11, lr} 83 84 add r9, r0, r1, lsl #2 85 sub r3, r9, #8 86 87 movs r1, r1, asr #2 88 beq PostMDCT_END 89 90 PostMDCT_LOOP: 91 ldr r8, [r2], #4 92 ldr r9, [r2], #4 93 94 ldrd r4, [r0] 95 ldrd r6, [r3] 96 97 smull r14, r11, r4, r8 @ MULHIGH(tr1, cosa) 98 smull r10, r12, r5, r8 @ MULHIGH(ti1, cosa) 99 100 smull r14, r8, r5, r9 @ MULHIGH(ti1, sina) 101 smull r5, r10, r4, r9 @ MULHIGH(tr1, sina) 102 103 add r4, r11, r8 @ MULHIGH(cosa, tr1) + MULHIGH(sina, ti1)@ 104 sub r11, r10, r12 @ MULHIGH(ti1, cosa) - MULHIGH(tr1, sina)@ 105 106 ldr r8, [r2], #4 @ 107 ldr r9, [r2], #4 108 109 smull r14, r5, r6, r8 @ MULHIGH(tr2, cosa) 110 smull r10, r12, r7, r8 @ MULHIGH(ti2, cosa) 111 112 smull r14, r8, r7, r9 @ MULHIGH(ti2, sina) 113 smull r7, r10, r6, r9 @ MULHIGH(tr2, sina) 114 115 add r6, r8, r5 @ MULHIGH(cosb, tr2) + MULHIGH(sinb, ti2)@ 116 sub r5, r10, r12 @ MULHIGH(sinb, tr2) - MULHIGH(cosb, ti2)@ 117 118 mov r7, r11 119 120 strd r4, [r0] 121 strd r6, [r3] 122 123 subs r1, r1, #1 124 sub r3, r3, #8 125 add r0, r0, #8 126 bne PostMDCT_LOOP 127 128 PostMDCT_END: 129 ldmia sp!, {r4 - r11, pc} 130 @ENDP @ |PostMDCT| 131 .end 132
