// license that can be found in the LICENSE file.

//go:build !math_big_pure_go && riscv64

#include "textflag.h"

// This file provides fast assembly versions for the elementary
// arithmetic operations on vectors implemented in arith.go.

TEXT ·addVV(SB),NOSPLIT,$0
	JMP ·addVV_g(SB)

TEXT ·subVV(SB),NOSPLIT,$0
	JMP ·subVV_g(SB)

TEXT ·addVW(SB),NOSPLIT,$0
	JMP ·addVW_g(SB)

TEXT ·subVW(SB),NOSPLIT,$0

	op_VCKSM  uint32 = 0xE766 // 	VRR-c	VECTOR CHECKSUM
	op_VCEQ   uint32 = 0xE7F8 // 	VRR-b	VECTOR COMPARE EQUAL
	op_VCH    uint32 = 0xE7FB // 	VRR-b	VECTOR COMPARE HIGH
	op_VCHL   uint32 = 0xE7F9 // 	VRR-b	VECTOR COMPARE HIGH LOGICAL
	op_VCLZ   uint32 = 0xE753 // 	VRR-a	VECTOR COUNT LEADING ZEROS
	op_VCTZ   uint32 = 0xE752 // 	VRR-a	VECTOR COUNT TRAILING ZEROS
	op_VEC    uint32 = 0xE7DB // 	VRR-a	VECTOR ELEMENT COMPARE

	MOVD	$16, R10
	MOVD	$32, R14
	MOVD	$48, R15
	ANDCC	$63, R6, R9	// Check for tailing bytes for later
	PCALIGN $16
	// Case for >= 64 bytes
	// Process 64 bytes per iteration
	// Load 4 vectors of a and b
	// XOR the corresponding vectors
	// from a and b and store the result
loop64:
	LXVD2X	(R4)(R8), VS32
	LXVD2X	(R4)(R10), VS34
	LXVD2X	(R4)(R14), VS36
	LXVD2X	(R4)(R15), VS38
	LXVD2X	(R5)(R8), VS33
	LXVD2X	(R5)(R10), VS35

//go:build arm64 && !linux && !freebsd && !android && (!darwin || ios) && !openbsd

package cpu

func osInit() {
	// Other operating systems do not support reading HWCap from auxiliary vector,
	// reading privileged aarch64 system registers or sysctl in user space to detect
	// CPU features at runtime.

	/* Vector instructions */

	/* Vector load */
	{as: ALVEBX, a1: C_XOREG, a6: C_VREG, type_: 45, size: 4}, /* vector load, x-form */

	/* Vector store */
	{as: ASTVEBX, a1: C_VREG, a6: C_XOREG, type_: 44, size: 4}, /* vector store, x-form */

	/* Vector logical */
	{as: AVAND, a1: C_VREG, a2: C_VREG, a6: C_VREG, type_: 82, size: 4}, /* vector and, vx-form */

	_, errUint64 := ParseUint("INVALID", 10, 64)

	vectors := []struct {
		err  error  // Input error
		want string // Function name wanted
	}{
		{errInt, "Atoi"},
		{errBool, "ParseBool"},
		{errFloat, "ParseFloat"},
		{errInt64, "ParseInt"},
		{errUint64, "ParseUint"},
	}

	for _, v := range vectors {
		nerr, ok := v.err.(*NumError)
		if !ok {

		arg = argVW{z, x, y, 0}
		testFunVWext(t, "addVW, vector of max uint", addVW, addVW_g, arg)

		// vector of '0', to force carry flag set in each 'sub'
		x = makeWordVec(0, n)
		arg = argVW{z, x, 1, 0}
		testFunVWext(t, "subVW, vector of zero", subVW, subVW_g, arg)
	}
}

type argVU struct {
	d  []Word // d is a Word slice, the input parameters x and z come from this array.

package chacha20

import "golang.org/x/sys/cpu"

var haveAsm = cpu.S390X.HasVX

const bufSize = 256

// xorKeyStreamVX is an assembly implementation of XORKeyStream. It must only
// be called when the vector facility is available. Implementation in asm_s390x.s.
//
//go:noescape
func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32)

func (c *Cipher) xorKeyStreamBlocks(dst, src []byte) {

	hwcap_SHA2    = 1 << 6
	hwcap_CRC32   = 1 << 7
	hwcap_ATOMICS = 1 << 8
	hwcap_CPUID   = 1 << 11
	hwcap_SHA512  = 1 << 21
)

func hwcapInit(os string) {
	// HWCap was populated by the runtime from the auxiliary vector.
	// Use HWCap information since reading aarch64 system registers
	// is not supported in user space on older linux kernels.
	ARM64.HasAES = isSet(HWCap, hwcap_AES)
	ARM64.HasPMULL = isSet(HWCap, hwcap_PMULL)

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package runtime

import "internal/cpu"

const (
	_HWCAP_VX = 1 << 11 // vector facility
)

func archauxv(tag, val uintptr) {
	switch tag {
	case _AT_HWCAP:
		cpu.HWCap = uint(val)
	}
}

func osArchInit() {}

func checkS390xCPU() {