ref: 0c5a048fa6f9590316fb668a372622402eaa0f43
dir: /vp8/common/arm/neon/loopfiltersimplehorizontaledge_neon.asm/
; ; Copyright (c) 2010 The WebM project authors. All Rights Reserved. ; ; Use of this source code is governed by a BSD-style license ; that can be found in the LICENSE file in the root of the source ; tree. An additional intellectual property rights grant can be found ; in the file PATENTS. All contributing project authors may ; be found in the AUTHORS file in the root of the source tree. ; EXPORT |vp8_loop_filter_simple_horizontal_edge_neon| ARM REQUIRE8 PRESERVE8 AREA ||.text||, CODE, READONLY, ALIGN=2 ;Note: flimit, limit, and thresh shpuld be positive numbers. All 16 elements in flimit ;are equal. So, in the code, only one load is needed ;for flimit. Same way applies to limit and thresh. ; r0 unsigned char *s, ; r1 int p, //pitch ; r2 const signed char *flimit, ; r3 const signed char *limit, ; stack(r4) const signed char *thresh, ; //stack(r5) int count --unused |vp8_loop_filter_simple_horizontal_edge_neon| PROC sub r0, r0, r1, lsl #1 ; move src pointer down by 2 lines ldr r12, _lfhy_coeff_ vld1.u8 {q5}, [r0], r1 ; p1 vld1.s8 {d2[], d3[]}, [r2] ; flimit vld1.s8 {d26[], d27[]}, [r3] ; limit -> q13 vld1.u8 {q6}, [r0], r1 ; p0 vld1.u8 {q0}, [r12]! ; 0x80 vld1.u8 {q7}, [r0], r1 ; q0 vld1.u8 {q10}, [r12]! ; 0x03 vld1.u8 {q8}, [r0] ; q1 ;vp8_filter_mask() function vabd.u8 q15, q6, q7 ; abs(p0 - q0) vabd.u8 q14, q5, q8 ; abs(p1 - q1) vqadd.u8 q15, q15, q15 ; abs(p0 - q0) * 2 vshr.u8 q14, q14, #1 ; abs(p1 - q1) / 2 vqadd.u8 q15, q15, q14 ; abs(p0 - q0) * 2 + abs(p1 - q1) / 2 ;vp8_filter() function veor q7, q7, q0 ; qs0: q0 offset to convert to a signed value veor q6, q6, q0 ; ps0: p0 offset to convert to a signed value veor q5, q5, q0 ; ps1: p1 offset to convert to a signed value veor q8, q8, q0 ; qs1: q1 offset to convert to a signed value vadd.u8 q1, q1, q1 ; flimit * 2 vadd.u8 q1, q1, q13 ; flimit * 2 + limit vcge.u8 q15, q1, q15 ; (abs(p0 - q0)*2 + abs(p1-q1)/2 > flimit*2 + limit)*-1 ;;;;;;;;;; ;vqsub.s8 q2, q7, q6 ; ( qs0 - ps0) vsubl.s8 q2, d14, d12 ; ( qs0 - ps0) vsubl.s8 q3, d15, d13 vqsub.s8 q4, q5, q8 ; q4: vp8_filter = vp8_signed_char_clamp(ps1-qs1) ;vmul.i8 q2, q2, q10 ; 3 * ( qs0 - ps0) vadd.s16 q11, q2, q2 ; 3 * ( qs0 - ps0) vadd.s16 q12, q3, q3 vld1.u8 {q9}, [r12]! ; 0x04 vadd.s16 q2, q2, q11 vadd.s16 q3, q3, q12 vaddw.s8 q2, q2, d8 ; vp8_filter + 3 * ( qs0 - ps0) vaddw.s8 q3, q3, d9 ;vqadd.s8 q4, q4, q2 ; vp8_filter = vp8_signed_char_clamp(vp8_filter + 3 * ( qs0 - ps0)) vqmovn.s16 d8, q2 ; vp8_filter = vp8_signed_char_clamp(vp8_filter + 3 * ( qs0 - ps0)) vqmovn.s16 d9, q3 ;;;;;;;;;;;;; vand q4, q4, q15 ; vp8_filter &= mask vqadd.s8 q2, q4, q10 ; Filter2 = vp8_signed_char_clamp(vp8_filter+3) vqadd.s8 q4, q4, q9 ; Filter1 = vp8_signed_char_clamp(vp8_filter+4) vshr.s8 q2, q2, #3 ; Filter2 >>= 3 vshr.s8 q4, q4, #3 ; Filter1 >>= 3 sub r0, r0, r1, lsl #1 ;calculate output vqadd.s8 q11, q6, q2 ; u = vp8_signed_char_clamp(ps0 + Filter2) vqsub.s8 q10, q7, q4 ; u = vp8_signed_char_clamp(qs0 - Filter1) add r3, r0, r1 veor q6, q11, q0 ; *op0 = u^0x80 veor q7, q10, q0 ; *oq0 = u^0x80 vst1.u8 {q6}, [r0] ; store op0 vst1.u8 {q7}, [r3] ; store oq0 bx lr ENDP ; |vp8_loop_filter_simple_horizontal_edge_neon| ;----------------- _lfhy_coeff_ DCD lfhy_coeff lfhy_coeff DCD 0x80808080, 0x80808080, 0x80808080, 0x80808080 DCD 0x03030303, 0x03030303, 0x03030303, 0x03030303 DCD 0x04040404, 0x04040404, 0x04040404, 0x04040404 END