ref: 8b5eddf709b5ecd09c2cec98c5418a2e3b0cfe14
dir: /vpx_dsp/arm/idct32x32_1_add_neon.asm/
; ; 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] ; cospi_16_64 = 11585 movw r12, #0x2d41 ; 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