// implemented in assembly in this package but declared in another
// package.

// The compiler generates calls to runtime.memequal and runtime.memequal_varlen.
// In addition, the runtime calls runtime.memequal explicitly.
// Those functions are implemented in this package.

//go:linkname abigen_runtime_memequal runtime.memequal
func abigen_runtime_memequal(a, b unsafe.Pointer, size uintptr) bool

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

#include "go_asm.h"
#include "textflag.h"

#define	CTXT	S10

// func memequal(a, b unsafe.Pointer, size uintptr) bool
TEXT runtime·memequal<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-25
	// X10 = a_base
	// X11 = b_base
	// X12 = size
	JMP	memequal<>(SB)

// func memequal_varlen(a, b unsafe.Pointer) bool
TEXT runtime·memequal_varlen<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-17

	bsink = []byte("0123456789ab")
}

// self-equality is always true. See issue 60777.
func EqualSelf(s string) bool {
	// amd64:`MOVL\t\$1, AX`,-`.*memequal.*`
	return s == s
}
func NotEqualSelf(s string) bool {
	// amd64:`XORL\tAX, AX`,-`.*memequal.*`
	return s != s
}

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

#include "go_asm.h"
#include "textflag.h"

#define	REGCTXT	R29

// memequal(a, b unsafe.Pointer, size uintptr) bool
TEXT runtime·memequal<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-25
	BEQ	R4, R5, eq
	ADDV	R4, R6, R7
	PCALIGN	$16
loop:
	BNE	R4, R7, test
	MOVV	$1, R4
	RET
test:

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

//go:build mips || mipsle

#include "go_asm.h"
#include "textflag.h"

#define	REGCTXT	R22

// memequal(a, b unsafe.Pointer, size uintptr) bool
TEXT runtime·memequal(SB),NOSPLIT,$0-13
	MOVW	a+0(FP), R1
	MOVW	b+4(FP), R2
	BEQ	R1, R2, eq
	MOVW	size+8(FP), R3
	ADDU	R1, R3, R4
loop:
	BNE	R1, R4, test
	MOVW	$1, R1

// Copyright 2018 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.

#include "go_asm.h"
#include "textflag.h"

// memequal(a, b unsafe.Pointer, size uintptr) bool
TEXT runtime·memequal(SB),NOSPLIT,$0-13
	MOVL	a+0(FP), SI
	MOVL	b+4(FP), DI
	CMPL	SI, DI
	JEQ	eq
	MOVL	size+8(FP), BX
	LEAL	ret+12(FP), AX
	JMP	memeqbody<>(SB)
eq:

// Copyright 2018 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.

#include "go_asm.h"
#include "textflag.h"

// memequal(p, q unsafe.Pointer, size uintptr) bool
TEXT runtime·memequal(SB), NOSPLIT, $0-25
	Get SP
	I64Load a+0(FP)
	I64Load b+8(FP)
	I64Load size+16(FP)
	Call memeqbody<>(SB)
	I64Store8 ret+24(FP)
	RET

	{"runtime.memmove", 1},
	{"runtime.memclrNoHeapPointers", 1},
	{"runtime.memclrHasPointers", 1},
	{"runtime.memequal", 1},
	{"runtime.memequal0", 1},
	{"runtime.memequal8", 1},
	{"runtime.memequal16", 1},
	{"runtime.memequal32", 1},
	{"runtime.memequal64", 1},
	{"runtime.memequal128", 1},
	{"runtime.f32equal", 1},
	{"runtime.f64equal", 1},
	{"runtime.c64equal", 1},

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

//go:build mips64 || mips64le

#include "go_asm.h"
#include "textflag.h"

#define	REGCTXT	R22

// memequal(a, b unsafe.Pointer, size uintptr) bool
TEXT runtime·memequal(SB),NOSPLIT|NOFRAME,$0-25
	MOVV	a+0(FP), R1
	MOVV	b+8(FP), R2
	BEQ	R1, R2, eq
	MOVV	size+16(FP), R3
	ADDV	R1, R3, R4

	// chunk size is 16

#define PAGE_OFFSET 4095

// Likewise, the BC opcode is hard to read, and no extended
// mnemonics are offered for these forms.
#define BGELR_CR6 BC  4, CR6LT, (LR)
#define BEQLR     BC 12, CR0EQ, (LR)

// memequal(a, b unsafe.Pointer, size uintptr) bool
TEXT runtime·memequal<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-25
	// R3 = a
	// R4 = b
	// R5 = size
	BR	memeqbody<>(SB)

// memequal_varlen(a, b unsafe.Pointer) bool