1 ; 2 ; Copyright (c) 2010 The Webm project authors. All Rights Reserved. 3 ; 4 ; Use of this source code is governed by a BSD-style license and patent 5 ; grant that can be found in the LICENSE file in the root of the source 6 ; tree. All contributing project authors may be found in the AUTHORS 7 ; file in the root of the source tree. 8 ; 9 10 11 EXPORT |idct_dequant_dc_0_2x_neon| 12 ARM 13 REQUIRE8 14 PRESERVE8 15 16 AREA ||.text||, CODE, READONLY, ALIGN=2 17 ;void idct_dequant_dc_0_2x_neon(short *dc, unsigned char *pre, 18 ; unsigned char *dst, int stride); 19 ; r0 *dc 20 ; r1 *pre 21 ; r2 *dst 22 ; r3 stride 23 |idct_dequant_dc_0_2x_neon| PROC 24 ldr r0, [r0] ; *dc 25 mov r12, #16 26 27 vld1.32 {d2[0]}, [r1], r12 ; lo 28 vld1.32 {d2[1]}, [r1], r12 29 vld1.32 {d4[0]}, [r1], r12 30 vld1.32 {d4[1]}, [r1] 31 sub r1, r1, #44 32 vld1.32 {d8[0]}, [r1], r12 ; hi 33 vld1.32 {d8[1]}, [r1], r12 34 vld1.32 {d10[0]}, [r1], r12 35 vld1.32 {d10[1]}, [r1] 36 37 sxth r1, r0 ; lo *dc 38 add r1, r1, #4 39 asr r1, r1, #3 40 vdup.16 q0, r1 41 sxth r0, r0, ror #16 ; hi *dc 42 add r0, r0, #4 43 asr r0, r0, #3 44 vdup.16 q3, r0 45 46 vaddw.u8 q1, q0, d2 ; lo 47 vaddw.u8 q2, q0, d4 48 vaddw.u8 q4, q3, d8 ; hi 49 vaddw.u8 q5, q3, d10 50 51 vqmovun.s16 d2, q1 ; lo 52 vqmovun.s16 d4, q2 53 vqmovun.s16 d8, q4 ; hi 54 vqmovun.s16 d10, q5 55 56 add r0, r2, #4 57 vst1.32 {d2[0]}, [r2], r3 ; lo 58 vst1.32 {d2[1]}, [r2], r3 59 vst1.32 {d4[0]}, [r2], r3 60 vst1.32 {d4[1]}, [r2] 61 vst1.32 {d8[0]}, [r0], r3 ; hi 62 vst1.32 {d8[1]}, [r0], r3 63 vst1.32 {d10[0]}, [r0], r3 64 vst1.32 {d10[1]}, [r0] 65 66 bx lr 67 68 ENDP ;|idct_dequant_dc_0_2x_neon| 69 END 70
