| ; |
| ; Copyright (c) 2013 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 |vpx_idct32x32_1_add_neon| |
| ARM |
| REQUIRE8 |
| PRESERVE8 |
| |
| AREA ||.text||, CODE, READONLY, ALIGN=2 |
| |
| ;TODO(hkuang): put the following macros in a seperate |
| ;file so other idct function could also use them. |
| MACRO |
| LD_16x8 $src, $stride |
| vld1.8 {q8}, [$src], $stride |
| vld1.8 {q9}, [$src], $stride |
| vld1.8 {q10}, [$src], $stride |
| vld1.8 {q11}, [$src], $stride |
| vld1.8 {q12}, [$src], $stride |
| vld1.8 {q13}, [$src], $stride |
| vld1.8 {q14}, [$src], $stride |
| vld1.8 {q15}, [$src], $stride |
| MEND |
| |
| MACRO |
| ADD_DIFF_16x8 $diff |
| vqadd.u8 q8, q8, $diff |
| vqadd.u8 q9, q9, $diff |
| vqadd.u8 q10, q10, $diff |
| vqadd.u8 q11, q11, $diff |
| vqadd.u8 q12, q12, $diff |
| vqadd.u8 q13, q13, $diff |
| vqadd.u8 q14, q14, $diff |
| vqadd.u8 q15, q15, $diff |
| MEND |
| |
| MACRO |
| SUB_DIFF_16x8 $diff |
| vqsub.u8 q8, q8, $diff |
| vqsub.u8 q9, q9, $diff |
| vqsub.u8 q10, q10, $diff |
| vqsub.u8 q11, q11, $diff |
| vqsub.u8 q12, q12, $diff |
| vqsub.u8 q13, q13, $diff |
| vqsub.u8 q14, q14, $diff |
| vqsub.u8 q15, q15, $diff |
| MEND |
| |
| MACRO |
| ST_16x8 $dst, $stride |
| vst1.8 {q8}, [$dst], $stride |
| vst1.8 {q9}, [$dst], $stride |
| vst1.8 {q10},[$dst], $stride |
| vst1.8 {q11},[$dst], $stride |
| vst1.8 {q12},[$dst], $stride |
| vst1.8 {q13},[$dst], $stride |
| vst1.8 {q14},[$dst], $stride |
| vst1.8 {q15},[$dst], $stride |
| MEND |
| |
| ;void vpx_idct32x32_1_add_neon(int16_t *input, uint8_t *dest, |
| ; int dest_stride) |
| ; |
| ; r0 int16_t input |
| ; r1 uint8_t *dest |
| ; r2 int dest_stride |
| |
| |vpx_idct32x32_1_add_neon| PROC |
| push {lr} |
| pld [r1] |
| add r3, r1, #16 ; r3 dest + 16 for second loop |
| ldrsh r0, [r0] |
| |
| ; generate cospi_16_64 = 11585 |
| mov r12, #0x2d00 |
| add r12, #0x41 |
| |
| ; out = dct_const_round_shift(input[0] * cospi_16_64) |
| mul r0, r0, r12 ; input[0] * cospi_16_64 |
| add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1)) |
| asr r0, r0, #14 ; >> DCT_CONST_BITS |
| |
| ; out = dct_const_round_shift(out * cospi_16_64) |
| mul r0, r0, r12 ; out * cospi_16_64 |
| mov r12, r1 ; save dest |
| add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1)) |
| asr r0, r0, #14 ; >> DCT_CONST_BITS |
| |
| ; a1 = ROUND_POWER_OF_TWO(out, 6) |
| add r0, r0, #32 ; + (1 <<((6) - 1)) |
| asrs r0, r0, #6 ; >> 6 |
| bge diff_positive_32_32 |
| |
| diff_negative_32_32 |
| neg r0, r0 |
| usat r0, #8, r0 |
| vdup.u8 q0, r0 |
| mov r0, #4 |
| |
| diff_negative_32_32_loop |
| sub r0, #1 |
| LD_16x8 r1, r2 |
| SUB_DIFF_16x8 q0 |
| ST_16x8 r12, r2 |
| |
| LD_16x8 r1, r2 |
| SUB_DIFF_16x8 q0 |
| ST_16x8 r12, r2 |
| cmp r0, #2 |
| moveq r1, r3 |
| moveq r12, r3 |
| cmp r0, #0 |
| bne diff_negative_32_32_loop |
| pop {pc} |
| |
| diff_positive_32_32 |
| usat r0, #8, r0 |
| vdup.u8 q0, r0 |
| mov r0, #4 |
| |
| diff_positive_32_32_loop |
| sub r0, #1 |
| LD_16x8 r1, r2 |
| ADD_DIFF_16x8 q0 |
| ST_16x8 r12, r2 |
| |
| LD_16x8 r1, r2 |
| ADD_DIFF_16x8 q0 |
| ST_16x8 r12, r2 |
| cmp r0, #2 |
| moveq r1, r3 |
| moveq r12, r3 |
| cmp r0, #0 |
| bne diff_positive_32_32_loop |
| pop {pc} |
| |
| ENDP ; |vpx_idct32x32_1_add_neon| |
| END |
