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 @void Residu ( 18 @ Word16 a[], /* (i) : prediction coefficients */ 19 @ Word16 x[], /* (i) : speech signal */ 20 @ Word16 y[], /* (o) : residual signal */ 21 @ Word16 lg /* (i) : size of filtering */ 22 @) 23 @a[] RN r0 24 @x[] RN r1 25 @y[] RN r2 26 @lg RN r3 27 28 .section .text 29 .global Residu_opt 30 31 Residu_opt: 32 33 STMFD r13!, {r4 - r12, r14} 34 SUB r7, r3, #4 @i = lg - 4 35 36 VLD1.S16 {D0, D1, D2, D3}, [r0]! @get all a[] 37 VLD1.S16 {D4}, [r0]! 38 VMOV.S32 Q8, #0x8000 39 40 LOOP1: 41 ADD r9, r1, r7, LSL #1 @copy the address 42 ADD r10, r2, r7, LSL #1 43 MOV r8, r9 44 VLD1.S16 D5, [r8]! @get x[i], x[i+1], x[i+2], x[i+3] 45 VQDMULL.S16 Q10, D5, D0[0] @finish the first L_mult 46 47 SUB r8, r9, #2 @get the x[i-1] address 48 VLD1.S16 D5, [r8]! 49 VQDMLAL.S16 Q10, D5, D0[1] 50 51 SUB r8, r9, #4 @load the x[i-2] address 52 VLD1.S16 D5, [r8]! 53 VQDMLAL.S16 Q10, D5, D0[2] 54 55 SUB r8, r9, #6 @load the x[i-3] address 56 VLD1.S16 D5, [r8]! 57 VQDMLAL.S16 Q10, D5, D0[3] 58 59 SUB r8, r9, #8 @load the x[i-4] address 60 VLD1.S16 D5, [r8]! 61 VQDMLAL.S16 Q10, D5, D1[0] 62 63 SUB r8, r9, #10 @load the x[i-5] address 64 VLD1.S16 D5, [r8]! 65 VQDMLAL.S16 Q10, D5, D1[1] 66 67 SUB r8, r9, #12 @load the x[i-6] address 68 VLD1.S16 D5, [r8]! 69 VQDMLAL.S16 Q10, D5, D1[2] 70 71 SUB r8, r9, #14 @load the x[i-7] address 72 VLD1.S16 D5, [r8]! 73 VQDMLAL.S16 Q10, D5, D1[3] 74 75 SUB r8, r9, #16 @load the x[i-8] address 76 VLD1.S16 D5, [r8]! 77 VQDMLAL.S16 Q10, D5, D2[0] 78 79 SUB r8, r9, #18 @load the x[i-9] address 80 VLD1.S16 D5, [r8]! 81 VQDMLAL.S16 Q10, D5, D2[1] 82 83 SUB r8, r9, #20 @load the x[i-10] address 84 VLD1.S16 D5, [r8]! 85 VQDMLAL.S16 Q10, D5, D2[2] 86 87 SUB r8, r9, #22 @load the x[i-11] address 88 VLD1.S16 D5, [r8]! 89 VQDMLAL.S16 Q10, D5, D2[3] 90 91 SUB r8, r9, #24 @load the x[i-12] address 92 VLD1.S16 D5, [r8]! 93 VQDMLAL.S16 Q10, D5, D3[0] 94 95 SUB r8, r9, #26 @load the x[i-13] address 96 VLD1.S16 D5, [r8]! 97 VQDMLAL.S16 Q10, D5, D3[1] 98 99 SUB r8, r9, #28 @load the x[i-14] address 100 VLD1.S16 D5, [r8]! 101 VQDMLAL.S16 Q10, D5, D3[2] 102 103 SUB r8, r9, #30 @load the x[i-15] address 104 VLD1.S16 D5, [r8]! 105 VQDMLAL.S16 Q10, D5, D3[3] 106 107 SUB r8, r9, #32 @load the x[i-16] address 108 VLD1.S16 D5, [r8]! 109 VQDMLAL.S16 Q10, D5, D4[0] 110 111 SUB r7, r7, #4 @i-=4 112 VQSHL.S32 Q10, Q10, #4 113 VQADD.S32 Q10, Q10, Q8 114 VSHRN.S32 D5, Q10, #16 115 VST1.S16 D5, [r10]! 116 CMP r7, #0 117 118 BGE LOOP1 119 120 Residu_asm_end: 121 122 LDMFD r13!, {r4 - r12, r15} 123 124 @ENDFUNC 125 .END 126 127 128
