//go:build !purego

package sha512

import "internal/cpu"

//go:noescape
func blockAVX2(dig *digest, p []byte)

//go:noescape
func blockAMD64(dig *digest, p []byte)

var useAVX2 = cpu.X86.HasAVX2 && cpu.X86.HasBMI1 && cpu.X86.HasBMI2

func block(dig *digest, p []byte) {
	if useAVX2 {
		blockAVX2(dig, p)
	} else {
		blockAMD64(dig, p)
	}

//go:build !purego

package sha1

import "internal/cpu"

//go:noescape
func blockAVX2(dig *digest, p []byte)

//go:noescape
func blockAMD64(dig *digest, p []byte)

var useAVX2 = cpu.X86.HasAVX2 && cpu.X86.HasBMI1 && cpu.X86.HasBMI2

func block(dig *digest, p []byte) {
	if useAVX2 && len(p) >= 256 {
		// blockAVX2 calculates sha1 for 2 block per iteration
		// it also interleaves precalculation for next block.

		{Name: "avx512bf16", Feature: &X86.HasAVX512BF16},
		{Name: "amxtile", Feature: &X86.HasAMXTile},
		{Name: "amxint8", Feature: &X86.HasAMXInt8},
		{Name: "amxbf16", Feature: &X86.HasAMXBF16},
		{Name: "bmi1", Feature: &X86.HasBMI1},
		{Name: "bmi2", Feature: &X86.HasBMI2},
		{Name: "cx16", Feature: &X86.HasCX16},
		{Name: "erms", Feature: &X86.HasERMS},
		{Name: "fma", Feature: &X86.HasFMA},
		{Name: "osxsave", Feature: &X86.HasOSXSAVE},

		// they can be turned off.
		options = append(options,
			option{Name: "avx", Feature: &X86.HasAVX},
			option{Name: "avx2", Feature: &X86.HasAVX2},
			option{Name: "bmi1", Feature: &X86.HasBMI1},
			option{Name: "bmi2", Feature: &X86.HasBMI2},
			option{Name: "fma", Feature: &X86.HasFMA})
	}
	if level < 4 {
		// These options are required at level 4. At lower levels
		// they can be turned off.

var X86 struct {
	_            CacheLinePad
	HasAES       bool
	HasADX       bool
	HasAVX       bool
	HasAVX2      bool
	HasAVX512F   bool
	HasAVX512BW  bool
	HasAVX512VL  bool
	HasBMI1      bool
	HasBMI2      bool
	HasERMS      bool
	HasFMA       bool
	HasOSXSAVE   bool
	HasPCLMULQDQ bool
	HasPOPCNT    bool
	HasRDTSCP    bool
	HasSHA       bool
	HasSSE3      bool
	HasSSSE3     bool

	HasAMXTile          bool // Advanced Matrix Extension Tile instructions
	HasAMXInt8          bool // Advanced Matrix Extension Int8 instructions
	HasAMXBF16          bool // Advanced Matrix Extension BFloat16 instructions
	HasBMI1             bool // Bit manipulation instruction set 1
	HasBMI2             bool // Bit manipulation instruction set 2
	HasCX16             bool // Compare and exchange 16 Bytes