| @/* |
| @ ** Copyright 2003-2010, VisualOn, Inc. |
| @ ** |
| @ ** Licensed under the Apache License, Version 2.0 (the "License"); |
| @ ** you may not use this file except in compliance with the License. |
| @ ** You may obtain a copy of the License at |
| @ ** |
| @ ** http://www.apache.org/licenses/LICENSE-2.0 |
| @ ** |
| @ ** Unless required by applicable law or agreed to in writing, software |
| @ ** distributed under the License is distributed on an "AS IS" BASIS, |
| @ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| @ ** See the License for the specific language governing permissions and |
| @ ** limitations under the License. |
| @ */ |
| @ |
| @void Pred_lt4( |
| @ Word16 exc[], /* in/out: excitation buffer */ |
| @ Word16 T0, /* input : integer pitch lag */ |
| @ Word16 frac, /* input : fraction of lag */ |
| @ Word16 L_subfr /* input : subframe size */ |
| @) |
| @*********************************************************************** |
| @ r0 --- exc[] |
| @ r1 --- T0 |
| @ r2 --- frac |
| @ r3 --- L_subfr |
| |
| .section .text |
| .global pred_lt4_asm |
| .extern inter4_2 |
| .hidden inter4_2 |
| |
| pred_lt4_asm: |
| |
| STMFD r13!, {r4 - r12, r14} |
| SUB r4, r0, r1, LSL #1 @ x = exc - T0 |
| RSB r2, r2, #0 @ frac = - frac |
| SUB r4, r4, #30 @ x -= L_INTERPOL2 - 1 |
| CMP r2, #0 |
| ADDLT r2, r2, #4 @ frac += UP_SAMP |
| SUBLT r4, r4, #2 @ x-- |
| |
| ADR r8, Lable1 |
| LDR r11, [r8] |
| ADD r11, r8 |
| RSB r2, r2, #3 @ k = UP_SAMP - 1 - frac |
| MOV r8, #0 @ j = 0 |
| ADD r11, r11, r2, LSL #6 @ get inter4_2[k][] |
| |
| VLD1.S16 {Q0, Q1}, [r11]! |
| VLD1.S16 {Q2, Q3}, [r11]! |
| |
| MOV r6, #0x8000 |
| |
| VLD1.S16 {Q4, Q5}, [r4]! @load 16 x[] |
| VLD1.S16 {Q6, Q7}, [r4]! @load 16 x[] |
| |
| LOOP: |
| VQDMULL.S16 Q15, D8, D0 |
| VQDMLAL.S16 Q15, D9, D1 |
| VQDMLAL.S16 Q15, D10, D2 |
| VQDMLAL.S16 Q15, D11, D3 |
| |
| VQDMLAL.S16 Q15, D12, D4 |
| VQDMLAL.S16 Q15, D13, D5 |
| VQDMLAL.S16 Q15, D14, D6 |
| VQDMLAL.S16 Q15, D15, D7 |
| |
| LDRSH r12, [r4], #2 |
| |
| VEXT.S16 D8, D8, D9, #1 |
| VEXT.S16 D9, D9, D10, #1 |
| VEXT.S16 D10, D10, D11, #1 |
| VEXT.S16 D11, D11, D12, #1 |
| VDUP.S16 D24, r12 |
| VEXT.S16 D12, D12, D13, #1 |
| VEXT.S16 D13, D13, D14, #1 |
| |
| VQADD.S32 D30, D30, D31 |
| MOV r11, #0x8000 |
| VPADD.S32 D30, D30, D30 |
| ADD r8, r8, #1 |
| VMOV.S32 r12, D30[0] |
| VEXT.S16 D14, D14, D15, #1 |
| |
| QADD r1, r12, r12 @ L_sum = (L_sum << 2) |
| VEXT.S16 D15, D15, D24, #1 |
| QADD r5, r1, r6 |
| MOV r1, r5, ASR #16 |
| CMP r8, r3 |
| STRH r1, [r0], #2 @ exc[j] = (L_sum + 0x8000) >> 16 |
| BLT LOOP |
| |
| pred_lt4_end: |
| |
| LDMFD r13!, {r4 - r12, r15} |
| |
| Lable1: |
| .word inter4_2-Lable1 |
| @ENDFUNC |
| .end |
| |
