Examples:

	TEXT ·Add(SB),NOSPLIT|NOFRAME,$0
	  PCALIGN $2048
	  MOVD $1, R0
	  MOVD $1, R1
	  RET

7. Move large constants to vector registers.

Go asm uses VMOVQ/VMOVD/VMOVS to move 128-bit, 64-bit and 32-bit constants into vector registers, respectively.
And for a 128-bit integer, it take two 64-bit operands, for the low and high parts separately.

Examples:

	VMOVS $0x11223344, V0

	BLT	tail		// Jump to the small string case
	SRD	$5, R4, R20
	MOVD	R20, CTR
	MOVD	$16, R21
	XXLXOR	V4, V4, V4
	XXLXOR	V5, V5, V5

	PCALIGN	$16
cmploop:
	LXVD2X	(R0)(R3), V0	// Count 32B per loop with two vector accumulators.
	LXVD2X	(R21)(R3), V2
	VCMPEQUB V2, V1, V2
	VCMPEQUB V0, V1, V0
	VPOPCNTD V2, V2		// A match is 0xFF or 0. Count the bits into doubleword buckets.
	VPOPCNTD V0, V0

	MOVL (AX)(X0*1), AX             // ERROR "invalid instruction"
	MOVL (AX)(Y0*1), AX             // ERROR "invalid instruction"
	// VSIB/VM is invalid without vector index.
	// TODO(quasilyte): improve error message (#21860).
	// "invalid VSIB address (missing vector index)"
	VPGATHERQQ Y2, (BP), Y1         // ERROR "invalid instruction"
	// AVX2GATHER mask/index/dest #UD cases.

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

// backtrack is a regular expression search with submatch
// tracking for small regular expressions and texts. It allocates
// a bit vector with (length of input) * (length of prog) bits,
// to make sure it never explores the same (character position, instruction)
// state multiple times. This limits the search to run in time linear in
// the length of the test.
//

		exit(1)
	}
}

const (
	_AT_NULL     = 0  // End of vector
	_AT_PAGESZ   = 6  // System physical page size
	_AT_PLATFORM = 15 // string identifying platform
	_AT_HWCAP    = 16 // hardware capability bit vector
	_AT_SECURE   = 23 // secure mode boolean
	_AT_RANDOM   = 25 // introduced in 2.6.29
	_AT_HWCAP2   = 26 // hardware capability bit vector 2
)

var procAuxv = []byte("/proc/self/auxv\x00")

type ofb struct {
	b       Block
	cipher  []byte
	out     []byte
	outUsed int
}

// NewOFB returns a [Stream] that encrypts or decrypts using the block cipher b
// in output feedback mode. The initialization vector iv's length must be equal
// to b's block size.
func NewOFB(b Block, iv []byte) Stream {
	blockSize := b.BlockSize()
	if len(iv) != blockSize {
		panic("cipher.NewOFB: IV length must equal block size")
	}

		[6]*argField{ap_VecSpReg_10_10_6_9, ap_Reg_11_15, ap_Reg_16_20}},
	{LXVRBX, 0xfc0007fe00000000, 0x7c00001a00000000, 0x0, // Load VSX Vector Rightmost Byte Indexed X-form (lxvrbx XT,RA,RB)
		[6]*argField{ap_VecSReg_31_31_6_10, ap_Reg_11_15, ap_Reg_16_20}},

		for j := 0; j < 4; j++ {
			if x := td[j][i]; x != w {
				t.Fatalf("td[%d][%d] = %#x, want %#x", j, i, x, w)
			}
			w = w<<24 | w>>8
		}
	}
}

// Test vectors are from FIPS 197:
//	https://csrc.nist.gov/publications/fips/fips197/fips-197.pdf

// Appendix A of FIPS 197: Key expansion examples
type KeyTest struct {
	key []byte
	enc []uint32

	// A URL like `javascript:checkThatFormNotEditedBeforeLeavingPage()`
	// from a trusted source should go in the page, but by default dynamic
	// `javascript:` URLs are filtered out since they are a frequently
	// exploited injection vector.
	//
	// Use of this type presents a security risk:
	// the encapsulated content should come from a trusted source,
	// as it will be included verbatim in the template output.
	URL string

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

//go:build !math_big_pure_go

#include "textflag.h"

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

// func addVV(z, x, y []Word) (c Word)
TEXT ·addVV(SB),NOSPLIT,$0
	MOVL z+0(FP), DI
	MOVL x+12(FP), SI
	MOVL y+24(FP), CX
	MOVL z_len+4(FP), BP
	MOVL $0, BX		// i = 0