| // Copyright 2025 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| //go:build goexperiment.simd && amd64 |
| |
| package archsimd |
| |
| // ClearAVXUpperBits clears the high bits of Y0-Y15 and Z0-Z15 registers. |
| // It is intended for transitioning from AVX to SSE, eliminating the |
| // performance penalties caused by false dependencies. |
| // |
| // Note: in the future the compiler may automatically generate the |
| // instruction, making this function unnecessary. |
| // |
| // Asm: VZEROUPPER, CPU Feature: AVX |
| func ClearAVXUpperBits() |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Int8x16) IsZero() bool |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Int8x32) IsZero() bool |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Int16x8) IsZero() bool |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Int16x16) IsZero() bool |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Int32x4) IsZero() bool |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Int32x8) IsZero() bool |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Int64x2) IsZero() bool |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Int64x4) IsZero() bool |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Uint8x16) IsZero() bool |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Uint8x32) IsZero() bool |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Uint16x8) IsZero() bool |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Uint16x16) IsZero() bool |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Uint32x4) IsZero() bool |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Uint32x8) IsZero() bool |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Uint64x2) IsZero() bool |
| |
| // IsZero returns true if all elements of x are zeros. |
| // |
| // This method compiles to VPTEST x, x. |
| // x.And(y).IsZero() and x.AndNot(y).IsZero() will be optimized to VPTEST x, y |
| // |
| // Asm: VPTEST, CPU Feature: AVX |
| func (x Uint64x4) IsZero() bool |
