| ; Copyright (C) 2009 The Android Open Source Project |
| ; |
| ; 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. |
| |
| ;------------------------------------------------------------------------------- |
| ;-- |
| ;-- Abstract : ARMv6 optimized version of h264bsdInterpolateHorHalf function |
| ;-- |
| ;------------------------------------------------------------------------------- |
| |
| |
| IF :DEF: H264DEC_WINASM |
| ;// We dont use REQUIRE8 and PRESERVE8 for winasm |
| ELSE |
| REQUIRE8 |
| PRESERVE8 |
| ENDIF |
| |
| AREA |.text|, CODE |
| |
| ;// h264bsdInterpolateHorHalf register allocation |
| |
| ref RN 0 |
| |
| mb RN 1 |
| buff RN 1 |
| |
| count RN 2 |
| x0 RN 2 |
| |
| y0 RN 3 |
| x_2_0 RN 3 |
| |
| width RN 4 |
| x_3_1 RN 4 |
| |
| height RN 5 |
| x_6_4 RN 5 |
| |
| partW RN 6 |
| x_7_5 RN 6 |
| |
| partH RN 7 |
| tmp1 RN 7 |
| |
| tmp2 RN 8 |
| |
| tmp3 RN 9 |
| |
| tmp4 RN 10 |
| |
| mult_20_01 RN 11 |
| mult_20_m5 RN 12 |
| |
| plus16 RN 14 |
| |
| |
| ;// function exports and imports |
| |
| IMPORT h264bsdFillBlock |
| |
| EXPORT h264bsdInterpolateHorHalf |
| |
| ;// Horizontal filter approach |
| ;// |
| ;// Basic idea in horizontal filtering is to adjust coefficients |
| ;// like below. Calculation is done with 16-bit maths. |
| ;// |
| ;// Reg x_2_0 x_3_1 x_6_4 x_7_5 x_2_0 |
| ;// [ 2 0 ] [ 3 1 ] [ 6 4 ] [ 7 5 ] [ 10 8 ] ... |
| ;// y_0 = 20 1 20 -5 -5 1 |
| ;// y_1 = -5 20 1 1 20 -5 |
| ;// y_2 = 1 -5 -5 20 1 20 |
| ;// y_3 = 1 20 -5 -5 20 1 |
| |
| |
| h264bsdInterpolateHorHalf |
| STMFD sp!, {r0-r11, lr} |
| SUB sp, sp, #0x1e4 |
| |
| CMP x0, #0 |
| BLT do_fill ;// (x0 < 0) |
| LDR partW, [sp,#0x220] ;// partWidth |
| ADD tmp4, x0, partW ;// (x0+partWidth) |
| ADD tmp4, tmp4, #5 ;// (y0+partW+5) |
| LDR width, [sp,#0x218] ;// width |
| CMP tmp4, width |
| BHI do_fill ;// (x0+partW)>width |
| |
| CMP y0, #0 |
| BLT do_fill ;// (y0 < 0) |
| LDR partH, [sp,#0x224] ;// partHeight |
| ADD tmp2, y0, partH ;// (y0+partHeight) |
| LDR height, [sp,#0x21c] ;// height |
| CMP tmp2, height |
| BLS skip_fill ;// no overfill needed |
| |
| |
| do_fill |
| LDR partH, [sp,#0x224] ;// partHeight |
| LDR height, [sp,#0x21c] ;// height |
| LDR partW, [sp,#0x220] ;// partWidth |
| ADD tmp4, partW, #5 ;// tmp4 = partW + 5; |
| STMIB sp, {height, tmp4} ;// sp+4 = height, sp+8 = partWidth+5 |
| STR partH, [sp,#0xc] ;// sp+c = partHeight |
| STR tmp4, [sp,#0x10] ;// sp+10 = partWidth+5 |
| LDR width, [sp,#0x218] ;// width |
| STR width, [sp,#0] ;// sp+0 = width |
| ADD buff, sp, #0x28 ;// buff = p1[21*21/4+1] |
| BL h264bsdFillBlock |
| |
| MOV x0, #0 |
| STR x0,[sp,#0x1ec] ;// x0 = 0 |
| STR x0,[sp,#0x1f0] ;// y0 = 0 |
| ADD ref,sp,#0x28 ;// ref = p1 |
| STR tmp4, [sp,#0x218] ;// width = partWidth+5 |
| |
| |
| skip_fill |
| LDR x0 ,[sp,#0x1ec] ;// x0 |
| LDR y0 ,[sp,#0x1f0] ;// y0 |
| LDR width, [sp,#0x218] ;// width |
| MLA tmp2, width, y0, x0 ;// y0*width+x0 |
| ADD ref, ref, tmp2 ;// ref += y0*width+x0 |
| ADD ref, ref, #8 ;// ref = ref+8 |
| LDR mb, [sp, #0x1e8] ;// mb |
| |
| ;// pack values to count register |
| ;// [31:28] loop_x (partWidth-1) |
| ;// [27:24] loop_y (partHeight-1) |
| ;// [23:20] partWidth-1 |
| ;// [19:16] partHeight-1 |
| ;// [15:00] width |
| MOV count, width |
| SUB partW, partW, #1; |
| SUB partH, partH, #1; |
| ADD tmp2, partH, partW, LSL #4 |
| ADD count, count, tmp2, LSL #16 |
| |
| |
| LDR mult_20_01, = 0x00140001 |
| LDR mult_20_m5, = 0x0014FFFB |
| MOV plus16, #16 |
| AND tmp1, count, #0x000F0000 ;// partHeight-1 |
| AND tmp3, count, #0x00F00000 ;// partWidth-1 |
| ADD count, count, tmp1, LSL #8 |
| loop_y |
| LDR x_3_1, [ref, #-8] |
| ADD count, count, tmp3, LSL #8 |
| LDR x_7_5, [ref, #-4] |
| UXTB16 x_2_0, x_3_1 |
| UXTB16 x_3_1, x_3_1, ROR #8 |
| UXTB16 x_6_4, x_7_5 |
| |
| loop_x |
| UXTB16 x_7_5, x_7_5, ROR #8 |
| |
| SMLAD tmp1, x_2_0, mult_20_01, plus16 |
| SMLATB tmp3, x_2_0, mult_20_01, plus16 |
| SMLATB tmp2, x_2_0, mult_20_m5, plus16 |
| SMLATB tmp4, x_3_1, mult_20_01, plus16 |
| |
| SMLAD tmp1, x_3_1, mult_20_m5, tmp1 |
| SMLATB tmp3, x_3_1, mult_20_m5, tmp3 |
| SMLAD tmp2, x_3_1, mult_20_01, tmp2 |
| LDR x_3_1, [ref], #4 |
| SMLAD tmp4, x_6_4, mult_20_m5, tmp4 |
| |
| SMLABB tmp1, x_6_4, mult_20_m5, tmp1 |
| SMLADX tmp3, x_6_4, mult_20_m5, tmp3 |
| SMLADX tmp2, x_6_4, mult_20_01, tmp2 |
| SMLADX tmp4, x_7_5, mult_20_m5, tmp4 |
| |
| SMLABB tmp1, x_7_5, mult_20_01, tmp1 |
| UXTB16 x_2_0, x_3_1 |
| SMLABB tmp2, x_7_5, mult_20_m5, tmp2 |
| SMLADX tmp3, x_7_5, mult_20_01, tmp3 |
| SMLABB tmp4, x_2_0, mult_20_01, tmp4 |
| |
| MOV tmp2, tmp2, ASR #5 |
| MOV tmp1, tmp1, ASR #5 |
| PKHBT tmp2, tmp2, tmp4, LSL #(16-5) |
| PKHBT tmp1, tmp1, tmp3, LSL #(16-5) |
| USAT16 tmp2, #8, tmp2 |
| USAT16 tmp1, #8, tmp1 |
| |
| SUBS count, count, #4<<28 |
| ORR tmp1, tmp1, tmp2, LSL #8 |
| STR tmp1, [mb], #4 |
| BCC next_y |
| |
| UXTB16 x_3_1, x_3_1, ROR #8 |
| |
| SMLAD tmp1, x_6_4, mult_20_01, plus16 |
| SMLATB tmp3, x_6_4, mult_20_01, plus16 |
| SMLATB tmp2, x_6_4, mult_20_m5, plus16 |
| SMLATB tmp4, x_7_5, mult_20_01, plus16 |
| |
| SMLAD tmp1, x_7_5, mult_20_m5, tmp1 |
| SMLATB tmp3, x_7_5, mult_20_m5, tmp3 |
| SMLAD tmp2, x_7_5, mult_20_01, tmp2 |
| LDR x_7_5, [ref], #4 |
| SMLAD tmp4, x_2_0, mult_20_m5, tmp4 |
| |
| SMLABB tmp1, x_2_0, mult_20_m5, tmp1 |
| SMLADX tmp3, x_2_0, mult_20_m5, tmp3 |
| SMLADX tmp2, x_2_0, mult_20_01, tmp2 |
| SMLADX tmp4, x_3_1, mult_20_m5, tmp4 |
| |
| SMLABB tmp1, x_3_1, mult_20_01, tmp1 |
| UXTB16 x_6_4, x_7_5 |
| SMLABB tmp2, x_3_1, mult_20_m5, tmp2 |
| SMLADX tmp3, x_3_1, mult_20_01, tmp3 |
| SMLABB tmp4, x_6_4, mult_20_01, tmp4 |
| |
| MOV tmp2, tmp2, ASR #5 |
| MOV tmp1, tmp1, ASR #5 |
| PKHBT tmp2, tmp2, tmp4, LSL #(16-5) |
| PKHBT tmp1, tmp1, tmp3, LSL #(16-5) |
| USAT16 tmp2, #8, tmp2 |
| USAT16 tmp1, #8, tmp1 |
| |
| SUBS count, count, #4<<28 |
| ORR tmp1, tmp1, tmp2, LSL #8 |
| STR tmp1, [mb], #4 |
| BCS loop_x |
| |
| next_y |
| AND tmp3, count, #0x00F00000 ;// partWidth-1 |
| SMLABB ref, count, mult_20_01, ref ;// +width |
| ADDS mb, mb, #16 ;// +16, Carry=0 |
| SBC mb, mb, tmp3, LSR #20 ;// -(partWidth-1)-1 |
| SBC ref, ref, tmp3, LSR #20 ;// -(partWidth-1)-1 |
| ADDS count, count, #(1<<28)-(1<<24) |
| BGE loop_y |
| |
| ADD sp,sp,#0x1f4 |
| LDMFD sp!, {r4-r11, pc} |
| |
| END |
| |
