frameworks/base/media/libstagefright/codecs/aacenc/src/asm/ARMV5E/CalcWindowEnergy_v5.s

   1 @/*\r
   2 @ ** Copyright 2003-2010, VisualOn, Inc.\r
   3 @ **\r
   4 @ ** Licensed under the Apache License, Version 2.0 (the "License");\r
   5 @ ** you may not use this file except in compliance with the License.\r
   6 @ ** You may obtain a copy of the License at\r
   7 @ **\r
   8 @ **     http://www.apache.org/licenses/LICENSE-2.0\r
   9 @ **\r
  10 @ ** Unless required by applicable law or agreed to in writing, software\r
  11 @ ** distributed under the License is distributed on an "AS IS" BASIS,\r
  12 @ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
  13 @ ** See the License for the specific language governing permissions and\r
  14 @ ** limitations under the License.\r
  15 @ */\r
  16 \r
  17 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
  18 @       File:           CalcWindowEnergy_v5.s\r
  19 @\r
  20 @       Content:        CalcWindowEnergy function armv5 assemble\r
  21 @\r
  22 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
  23 \r
  24         .section .text\r
  25         \r
  26         .global CalcWindowEnergy\r
  27 \r
  28 CalcWindowEnergy:\r
  29         stmdb   sp!, {r4 - r11, lr}\r
  30         sub     r13, r13, #20 \r
  31 \r
  32   mov     r3, r3, lsl #16                         \r
  33         ldr     r10, [r0, #168]                    @ states0 = blockSwitchingControl->iirStates[0];\r
  34   mov     r3, r3, asr #16 \r
  35         ldr     r11, [r0, #172]                    @ states1 = blockSwitchingControl->iirStates[1];\r
  36 \r
  37         mov     r2, r2, lsl #16\r
  38         ldr     r12, hiPassCoeff                   @ Coeff0 = hiPassCoeff[0];      \r
  39   mov     r2, r2, asr #16\r
  40         ldr     r14, hiPassCoeff + 4                             @ Coeff1 = hiPassCoeff[1];\r
  41         \r
  42         mov                     r8, #0                                                                 @ w=0\r
  43         mov                     r5, #0                                                                 @ wOffset = 0;\r
  44         \r
  45 BLOCK_BEGIN:\r
  46         mov                     r6, #0                             @ accuUE = 0; \r
  47         mov                     r7, #0                                                                       @ accuFE = 0; \r
  48         mov                     r4, #0                                                                 @ i=0\r
  49                                    \r
  50         str                     r8, [r13, #4]   \r
  51         str                     r0, [r13, #8]   \r
  52         str                     r3, [r13, #12]\r
  53         \r
  54 ENERGY_BEG:     \r
  55         mov     r9, r5, lsl #1  \r
  56         ldrsh   r9, [r1, r9]                                                                                    @ tempUnfiltered = timeSignal[tidx];\r
  57 \r
  58         add                     r5, r5, r2                                                                                              @ tidx = tidx + chIncrement;\r
  59         \r
  60         smulwb  r3, r14, r9                                                                                             @ accu1 = L_mpy_ls(Coeff1, tempUnfiltered);     \r
  61         smull           r0, r8, r12, r11                                                                        @ accu2 = fixmul( Coeff0, states1 );\r
  62         \r
  63         mov                     r3, r3, lsl #1\r
  64         mov                     r8, r8, lsl #1\r
  65 \r
  66         sub                     r0, r3, r10                                                                                             @ accu3 = accu1 - states0;      \r
  67         sub                     r8,     r0, r8                                                                                          @ out = accu3 - accu2;\r
  68 \r
  69         mov               r10, r3                                                                                                               @ states0 = accu1;\r
  70         mov               r11, r8                                                                                                               @ states1 = out;  \r
  71         \r
  72         mul               r3, r9, r9    \r
  73         mov     r8, r8, asr #16\r
  74         \r
  75         add               r4, r4, #1\r
  76         add     r6, r6, r3, asr #7\r
  77 \r
  78         mul               r9, r8, r8    \r
  79         ldr               r3, [r13, #12]\r
  80 \r
  81         add               r7, r7, r9, asr #7\r
  82                 \r
  83         cmp     r4, r3                            \r
  84   blt     ENERGY_BEG       \r
  85         \r
  86         ldr               r0, [r13, #8]\r
  87         ldr               r8, [r13, #4]\r
  88         \r
  89 ENERGY_END:\r
  90         add               r4, r0, r8, lsl #2\r
  91 \r
  92         str     r6, [r4, #72]         \r
  93         add               r8, r8, #1               \r
  94   str     r7, [r4, #136]                   \r
  95 \r
  96         cmp               r8, #8\r
  97         blt               BLOCK_BEGIN                                           \r
  98 \r
  99 BLOCK_END:\r
 100         str     r10, [r0, #168]                    \r
 101   str     r11, [r0, #172]                    \r
 102   mov     r0, #1            \r
 103                         \r
 104   add     r13, r13, #20   \r
 105         ldmia   sp!, {r4 - r11, pc}                  \r
 106 \r
 107 hiPassCoeff:\r
 108         .word 0xbec8b439\r
 109         .word   0x609d4952\r
 110                 \r
 111         @ENDP\r
 112         .end\r