| /* |
| * 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 SkPMFloat.h |
| |
| inline SkPMFloat::SkPMFloat(SkPMColor c) { |
| SkPMColorAssert(c); |
| uint8x8_t fix8 = (uint8x8_t)vdup_n_u32(c); |
| uint16x8_t fix8_16 = vmovl_u8(fix8); |
| uint32x4_t fix8_32 = vmovl_u16(vget_low_u16(fix8_16)); |
| fVec = vmulq_f32(vcvtq_f32_u32(fix8_32), vdupq_n_f32(1.0f/255)); |
| SkASSERT(this->isValid()); |
| } |
| |
| inline SkPMColor SkPMFloat::round() const { |
| // vcvt_u32_f32 truncates, so we round manually by adding a half before converting. |
| float32x4_t rounded = vmlaq_f32(vdupq_n_f32(0.5f), fVec, vdupq_n_f32(255)); |
| uint32x4_t fix8_32 = vcvtq_u32_f32(rounded); |
| uint16x4_t fix8_16 = vqmovn_u32(fix8_32); |
| uint8x8_t fix8 = vqmovn_u16(vcombine_u16(fix8_16, vdup_n_u16(0))); |
| SkPMColor c = vget_lane_u32((uint32x2_t)fix8, 0); |
| SkPMColorAssert(c); |
| return c; |
| } |
| |
| inline Sk4f SkPMFloat::alphas() const { |
| static_assert(SK_A32_SHIFT == 24, "Assuming little-endian."); |
| return vdupq_lane_f32(vget_high_f32(fVec), 1); // Duplicate high lane of high half i.e. lane 3. |
| } |
| |
| } // namespace |