cpu_windows_arm64.go

     1  // Copyright 2026 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package cpu
     6  
     7  func doinit() {
     8  	// set HasASIMD and HasFP to true as per
     9  	// https://learn.microsoft.com/en-us/cpp/build/arm64-windows-abi-conventions?view=msvc-170#base-requirements
    10  	//
    11  	// The ARM64 version of Windows always presupposes that it's running on an ARMv8 or later architecture.
    12  	// Both floating-point and NEON support are presumed to be present in hardware.
    13  	//
    14  	ARM64.HasASIMD = true
    15  	ARM64.HasFP = true
    16  
    17  	if isProcessorFeaturePresent(_PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE) {
    18  		ARM64.HasAES = true
    19  		ARM64.HasPMULL = true
    20  		ARM64.HasSHA1 = true
    21  		ARM64.HasSHA2 = true
    22  	}
    23  	ARM64.HasSHA3 = isProcessorFeaturePresent(_PF_ARM_SHA3_INSTRUCTIONS_AVAILABLE)
    24  	ARM64.HasCRC32 = isProcessorFeaturePresent(_PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE)
    25  	ARM64.HasSHA512 = isProcessorFeaturePresent(_PF_ARM_SHA512_INSTRUCTIONS_AVAILABLE)
    26  	ARM64.HasATOMICS = isProcessorFeaturePresent(_PF_ARM_V81_ATOMIC_INSTRUCTIONS_AVAILABLE)
    27  	if isProcessorFeaturePresent(_PF_ARM_V82_DP_INSTRUCTIONS_AVAILABLE) {
    28  		ARM64.HasASIMDDP = true
    29  		ARM64.HasASIMDRDM = true
    30  	}
    31  	if isProcessorFeaturePresent(_PF_ARM_V83_LRCPC_INSTRUCTIONS_AVAILABLE) {
    32  		ARM64.HasLRCPC = true
    33  		ARM64.HasSM3 = true
    34  	}
    35  	ARM64.HasSVE = isProcessorFeaturePresent(_PF_ARM_SVE_INSTRUCTIONS_AVAILABLE)
    36  	ARM64.HasSVE2 = isProcessorFeaturePresent(_PF_ARM_SVE2_INSTRUCTIONS_AVAILABLE)
    37  	ARM64.HasJSCVT = isProcessorFeaturePresent(_PF_ARM_V83_JSCVT_INSTRUCTIONS_AVAILABLE)
    38  }
    39
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