diff options
Diffstat (limited to 'src/core/NEON/NEMath.inl')
-rw-r--r-- | src/core/NEON/NEMath.inl | 50 |
1 files changed, 49 insertions, 1 deletions
diff --git a/src/core/NEON/NEMath.inl b/src/core/NEON/NEMath.inl index 05cf3013bc..1b0b894153 100644 --- a/src/core/NEON/NEMath.inl +++ b/src/core/NEON/NEMath.inl @@ -1,5 +1,5 @@ /* - * Copyright (c) 2016-2021 Arm Limited. + * Copyright (c) 2016-2022 Arm Limited. * * SPDX-License-Identifier: MIT * @@ -166,6 +166,43 @@ inline float32x4_t vexpq_f32(float32x4_t x) return poly; } +#ifdef __aarch64__ +inline float32x4_t verfq_f32(float32x4_t x) +{ + static const float erffdata[4] = { 0.278393f, 0.230389f, 0.000972f, 0.078108f }; + static const float32x4_t coeffdata = vld1q_f32(erffdata); + static const float32x4_t onev{ vdupq_n_f32(1.0f) }; + + uint32x4_t selector = vcltzq_f32(x); + + float32x4_t absx = vabsq_f32(x); + float32x4_t absx2 = vmulq_f32(x, x); + float32x4_t absx3 = vmulq_f32(absx2, absx); + float32x4_t absx4 = vmulq_f32(absx2, absx2); + + float32x4_t denom = onev; + denom = vfmaq_laneq_f32(denom, absx, coeffdata, 0); + denom = vfmaq_laneq_f32(denom, absx2, coeffdata, 1); + denom = vfmaq_laneq_f32(denom, absx3, coeffdata, 2); + denom = vfmaq_laneq_f32(denom, absx4, coeffdata, 3); + + denom = vmulq_f32(denom, denom); + denom = vmulq_f32(denom, denom); + + float32x4_t fract = onev; + fract = vdivq_f32(fract, denom); + + float32x4_t result = onev; + result = vsubq_f32(result, fract); + + float32x4_t inverse = vnegq_f32(result); + + result = vbslq_f32(selector, inverse, result); + + return result; +} +#endif // #ifdef __aarch64__ + inline float32x4_t vlogq_f32(float32x4_t x) { static const int32x4_t CONST_127 = vdupq_n_s32(127); // 127 @@ -517,6 +554,17 @@ inline float16x8_t vexpq_f16(float16x8_t x) return res; } +#ifdef __aarch64__ +inline float16x8_t verfq_f16(float16x8_t x) +{ + const float32x4_t x_high = vcvt_f32_f16(vget_high_f16(x)); + const float32x4_t x_low = vcvt_f32_f16(vget_low_f16(x)); + + const float16x8_t res = vcombine_f16(vcvt_f16_f32(verfq_f32(x_low)), vcvt_f16_f32(verfq_f32(x_high))); + return res; +} +#endif // #ifdef __aarch64__ + inline float16x8_t vlogq_f16(float16x8_t x) { const float32x4_t x_high = vcvt_f32_f16(vget_high_f16(x)); |