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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.
*/
namespace { // See Sk4px.h
inline Sk4px Sk4px::DupPMColor(SkPMColor px) { return Sk16b((uint8x16_t)vdupq_n_u32(px)); }
inline Sk4px Sk4px::Load4(const SkPMColor px[4]) {
return Sk16b((uint8x16_t)vld1q_u32(px));
}
inline Sk4px Sk4px::Load2(const SkPMColor px[2]) {
uint32x2_t px2 = vld1_u32(px);
return Sk16b((uint8x16_t)vcombine_u32(px2, px2));
}
inline Sk4px Sk4px::Load1(const SkPMColor px[1]) {
return Sk16b((uint8x16_t)vdupq_n_u32(*px));
}
inline void Sk4px::store4(SkPMColor px[4]) const {
vst1q_u32(px, (uint32x4_t)this->fVec);
}
inline void Sk4px::store2(SkPMColor px[2]) const {
vst1_u32(px, (uint32x2_t)vget_low_u8(this->fVec));
}
inline void Sk4px::store1(SkPMColor px[1]) const {
vst1q_lane_u32(px, (uint32x4_t)this->fVec, 0);
}
inline Sk4px::Wide Sk4px::widenLo() const {
return Sk16h(vmovl_u8(vget_low_u8 (this->fVec)),
vmovl_u8(vget_high_u8(this->fVec)));
}
inline Sk4px::Wide Sk4px::widenHi() const {
return Sk16h(vshll_n_u8(vget_low_u8 (this->fVec), 8),
vshll_n_u8(vget_high_u8(this->fVec), 8));
}
inline Sk4px::Wide Sk4px::widenLoHi() const {
auto zipped = vzipq_u8(this->fVec, this->fVec);
return Sk16h((uint16x8_t)zipped.val[0],
(uint16x8_t)zipped.val[1]);
}
inline Sk4px::Wide Sk4px::mulWiden(const Sk16b& other) const {
return Sk16h(vmull_u8(vget_low_u8 (this->fVec), vget_low_u8 (other.fVec)),
vmull_u8(vget_high_u8(this->fVec), vget_high_u8(other.fVec)));
}
inline Sk4px Sk4px::Wide::addNarrowHi(const Sk16h& other) const {
const Sk4px::Wide o(other); // Should be no code, but allows us to access fLo, fHi.
return Sk16b(vcombine_u8(vaddhn_u16(this->fLo.fVec, o.fLo.fVec),
vaddhn_u16(this->fHi.fVec, o.fHi.fVec)));
}
inline Sk4px Sk4px::Wide::div255() const {
// Calculated as (x + (x+128)>>8 +128) >> 8. The 'r' in each instruction provides each +128.
return Sk16b(vcombine_u8(vraddhn_u16(this->fLo.fVec, vrshrq_n_u16(this->fLo.fVec, 8)),
vraddhn_u16(this->fHi.fVec, vrshrq_n_u16(this->fHi.fVec, 8))));
}
inline Sk4px Sk4px::alphas() const {
auto as = vshrq_n_u32((uint32x4_t)fVec, SK_A32_SHIFT); // ___3 ___2 ___1 ___0
return Sk16b((uint8x16_t)vmulq_n_u32(as, 0x01010101)); // 3333 2222 1111 0000
}
inline Sk4px Sk4px::Load4Alphas(const SkAlpha a[4]) {
uint8x16_t a8 = vdupq_n_u8(0); // ____ ____ ____ ____
a8 = vld1q_lane_u8(a+0, a8, 0); // ____ ____ ____ ___0
a8 = vld1q_lane_u8(a+1, a8, 4); // ____ ____ ___1 ___0
a8 = vld1q_lane_u8(a+2, a8, 8); // ____ ___2 ___1 ___0
a8 = vld1q_lane_u8(a+3, a8, 12); // ___3 ___2 ___1 ___0
auto a32 = (uint32x4_t)a8; //
return Sk16b((uint8x16_t)vmulq_n_u32(a32, 0x01010101)); // 3333 2222 1111 0000
}
inline Sk4px Sk4px::Load2Alphas(const SkAlpha a[2]) {
uint8x16_t a8 = vdupq_n_u8(0); // ____ ____ ____ ____
a8 = vld1q_lane_u8(a+0, a8, 0); // ____ ____ ____ ___0
a8 = vld1q_lane_u8(a+1, a8, 4); // ____ ____ ___1 ___0
auto a32 = (uint32x4_t)a8; //
return Sk16b((uint8x16_t)vmulq_n_u32(a32, 0x01010101)); // ____ ____ 1111 0000
}
inline Sk4px Sk4px::zeroColors() const {
return Sk16b(vandq_u8(this->fVec, (uint8x16_t)vdupq_n_u32(0xFF << SK_A32_SHIFT)));
}
inline Sk4px Sk4px::zeroAlphas() const {
// vbic(a,b) == a & ~b
return Sk16b(vbicq_u8(this->fVec, (uint8x16_t)vdupq_n_u32(0xFF << SK_A32_SHIFT)));
}
} // namespace
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