| ; |
| ; Copyright (c) 2010 The Webm project authors. All Rights Reserved. |
| ; |
| ; Use of this source code is governed by a BSD-style license and patent |
| ; grant that can be found in the LICENSE file in the root of the source |
| ; tree. All contributing project authors may be found in the AUTHORS |
| ; file in the root of the source tree. |
| ; |
| |
| |
| EXPORT |idct_dequant_dc_0_2x_neon| |
| ARM |
| REQUIRE8 |
| PRESERVE8 |
| |
| AREA ||.text||, CODE, READONLY, ALIGN=2 |
| |
| ;void idct_dequant_dc_0_2x_neon(short *q, short *dq, |
| ; unsigned char *dst, int stride); |
| ; r0 *q, |
| ; r1 *dq, |
| ; r2 *dst |
| ; r3 stride |
| ; sp *dc |
| |idct_dequant_dc_0_2x_neon| PROC |
| |
| ; no q- or dq-coeffs, so r0 and r1 are free to use |
| ldr r1, [sp] ; *dc |
| add r12, r2, #4 |
| ldr r0, [r1] |
| |
| vld1.32 {d2[0]}, [r2], r3 ; lo |
| vld1.32 {d8[0]}, [r12], r3 ; hi |
| vld1.32 {d2[1]}, [r2], r3 |
| vld1.32 {d8[1]}, [r12], r3 |
| vld1.32 {d4[0]}, [r2], r3 |
| vld1.32 {d10[0]}, [r12], r3 |
| vld1.32 {d4[1]}, [r2], r3 |
| vld1.32 {d10[1]}, [r12] |
| |
| sxth r1, r0 ; lo *dc |
| add r1, r1, #4 |
| asr r1, r1, #3 |
| vdup.16 q0, r1 |
| sxth r0, r0, ror #16 ; hi *dc |
| add r0, r0, #4 |
| asr r0, r0, #3 |
| vdup.16 q3, r0 |
| |
| vaddw.u8 q1, q0, d2 ; lo |
| vaddw.u8 q2, q0, d4 |
| vaddw.u8 q4, q3, d8 ; hi |
| vaddw.u8 q5, q3, d10 |
| |
| vqmovun.s16 d2, q1 ; lo |
| vqmovun.s16 d4, q2 |
| vqmovun.s16 d8, q4 ; hi |
| vqmovun.s16 d10, q5 |
| |
| sub r2, r2, r3, lsl #2 ; dst - 4*stride |
| add r0, r2, #4 |
| |
| vst1.32 {d2[0]}, [r2], r3 ; lo |
| vst1.32 {d8[0]}, [r0], r3 ; hi |
| vst1.32 {d2[1]}, [r2], r3 |
| vst1.32 {d8[1]}, [r0], r3 |
| vst1.32 {d4[0]}, [r2], r3 |
| vst1.32 {d10[0]}, [r0], r3 |
| vst1.32 {d4[1]}, [r2] |
| vst1.32 {d10[1]}, [r0] |
| |
| bx lr |
| |
| ENDP ;|idct_dequant_dc_0_2x_neon| |
| END |
