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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkTypes.h"
#include <arm_neon.h>
void sk_memset32_neon(uint32_t dst[], uint32_t value, int count) {
uint32x4_t v4 = vdupq_n_u32(value);
uint32x4x4_t v16 = { v4, v4, v4, v4 };
while (count >= 16) {
vst4q_u32(dst, v16); // This swizzles, but we don't care: all lanes are the same, value.
dst += 16;
count -= 16;
}
SkASSERT(count < 16);
switch (count / 4) {
case 3: vst1q_u32(dst, v4); dst += 4; count -= 4;
case 2: vst1q_u32(dst, v4); dst += 4; count -= 4;
case 1: vst1q_u32(dst, v4); dst += 4; count -= 4;
}
SkASSERT(count < 4);
if (count >= 2) {
vst1_u32(dst, vget_low_u32(v4));
dst += 2;
count -= 2;
}
SkASSERT(count < 2);
if (count > 0) {
*dst = value;
}
}
void sk_memset16_neon(uint16_t dst[], uint16_t value, int count) {
uint16x8_t v8 = vdupq_n_u16(value);
uint16x8x4_t v32 = { v8, v8, v8, v8 };
while (count >= 32) {
vst4q_u16(dst, v32); // This swizzles, but we don't care: all lanes are the same, value.
dst += 32;
count -= 32;
}
SkASSERT(count < 32);
switch (count / 8) {
case 3: vst1q_u16(dst, v8); dst += 8; count -= 8;
case 2: vst1q_u16(dst, v8); dst += 8; count -= 8;
case 1: vst1q_u16(dst, v8); dst += 8; count -= 8;
}
SkASSERT(count < 8);
if (count >= 4) {
vst1_u16(dst, vget_low_u16(v8));
dst += 4;
count -= 4;
}
SkASSERT(count < 4);
switch (count) {
case 3: *dst++ = value;
case 2: *dst++ = value;
case 1: *dst = value;
}
}
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