ADDV	R4, R5, R6

	// if less than 8 bytes, do one byte at a time
	SGTU	$8, R5, R8
	BNE	R8, out

	// do one byte at a time until 8-aligned
	AND	$7, R4, R8
	BEQ	R8, words
	MOVB	R0, (R4)
	ADDV	$1, R4
	JMP	-4(PC)

words:
	// do 8 bytes at a time if there is room
	ADDV	$-7, R6, R5

	PCALIGN	$16
	SGTU	R5, R4, R8
	BEQ	R8, out
	MOVV	R0, (R4)
	ADDV	$8, R4
	JMP	-4(PC)

out:

	SGT	$74565, R4, R5 			// 5e020014de178d0385781200
	SGT	$4097, R4 			// 3e000014de07800384781200
	SGT	$4097, R4, R5 			// 3e000014de07800385781200
	SGTU	$74565, R4 			// 5e020014de178d0384f81200
	SGTU	$74565, R4, R5 			// 5e020014de178d0385f81200
	SGTU	$4097, R4 			// 3e000014de07800384f81200
	SGTU	$4097, R4, R5 			// 3e000014de07800385f81200
	ADDU	$74565, R4 			// 5e020014de178d0384781000
	ADDU	$74565, R4, R5 			// 5e020014de178d0385781000

(EqPtr x y) => (SGTUconst [1] (XOR x y))
(Eq(32|64)F x y) => (FPFlagTrue (CMPEQ(F|D) x y))

(Neq8 x y)  => (SGTU (XOR (ZeroExt8to32 x) (ZeroExt8to32 y)) (MOVWconst [0]))
(Neq16 x y) => (SGTU (XOR (ZeroExt16to32 x) (ZeroExt16to32 y)) (MOVWconst [0]))
(Neq32 x y) => (SGTU (XOR x y) (MOVWconst [0]))
(NeqPtr x y) => (SGTU (XOR x y) (MOVWconst [0]))
(Neq(32|64)F x y) => (FPFlagFalse (CMPEQ(F|D) x y))

// 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
	SGTU	$16, R3, R8
	BEQ	R0, R8, chunk_entry

byte_loop:
	BNE	R1, R4, byte_test
	MOVV	$1, R1
	MOVB	R1, ret+24(FP)
	RET
byte_test:
	MOVBU	(R1), R6
	ADDV	$1, R1
	MOVBU	(R2), R7
	ADDV	$1, R2

	// match: (IsInBounds idx len)
	// result: (SGTU len idx)
	for {
		idx := v_0
		len := v_1
		v.reset(OpLOONG64SGTU)
		v.AddArg2(len, idx)
		return true
	}
}
func rewriteValueLOONG64_OpIsNonNil(v *Value) bool {
	v_0 := v.Args[0]
	b := v.Block
	typ := &b.Func.Config.Types
	// match: (IsNonNil ptr)
	// result: (SGTU ptr (MOVVconst [0]))
	for {
		ptr := v_0

	ADDU	R3, R2, R4	// end pointer for source
	ADDU	R3, R1, R5	// end pointer for destination

	// if destination is ahead of source, start at the end of the buffer and go backward.
	SGTU	R1, R2, R6
	BNE	R6, backward

	// if less than 4 bytes, use byte by byte copying
	SGTU	$4, R3, R6
	BNE	R6, f_small_copy

	// align destination to 4 bytes
	AND	$3, R1, R6
	BEQ	R6, f_dest_aligned
	SUBU	R1, R0, R6
	AND	$3, R6
	MOVWHI	0(R2), R7

	// match: (IsInBounds idx len)
	// result: (SGTU len idx)
	for {
		idx := v_0
		len := v_1
		v.reset(OpMIPS64SGTU)
		v.AddArg2(len, idx)
		return true
	}
}
func rewriteValueMIPS64_OpIsNonNil(v *Value) bool {
	v_0 := v.Args[0]
	b := v.Block
	typ := &b.Func.Config.Types
	// match: (IsNonNil ptr)
	// result: (SGTU ptr (MOVVconst [0]))
	for {
		ptr := v_0

	"MULU",
	"MULW",
	"NEGD",
	"NEGF",
	"NEGW",
	"NEGV",
	"NOOP",
	"NOR",
	"OR",
	"REM",
	"REMU",
	"RFE",
	"ROTR",
	"ROTRV",
	"SC",
	"SCV",
	"SEB",
	"SEH",
	"SGT",
	"SGTU",
	"SLL",
	"SQRTD",
	"SQRTF",
	"SRA",
	"SRL",
	"SUB",
	"SUBD",
	"SUBF",
	"SUBU",
	"SUBW",
	"SYNC",
	"SYSCALL",
	"TEQ",
	"TLBP",
	"TLBR",
	"TLBWI",
	"TLBWR",
	"TNE",

	"MULD",
	"MULF",
	"MULU",
	"MULH",
	"MULHU",
	"MULW",
	"NEGD",
	"NEGF",
	"NEGW",
	"NEGV",
	"NOOP",
	"NOR",
	"OR",
	"REM",
	"REMU",
	"RFE",
	"SC",
	"SCV",
	"SGT",
	"SGTU",
	"SLL",
	"SQRTD",
	"SQRTF",
	"SRA",
	"SRL",
	"ROTR",
	"SUB",
	"SUBD",
	"SUBF",
	"SUBU",
	"SUBW",
	"DBAR",
	"SYSCALL",
	"TEQ",
	"TNE",
	"WORD",
	"XOR",
	"MASKEQZ",

// func memclrNoHeapPointers(ptr unsafe.Pointer, n uintptr)
TEXT runtime·memclrNoHeapPointers(SB),NOSPLIT,$0-8
	MOVW	n+4(FP), R2
	MOVW	ptr+0(FP), R1

	SGTU	$4, R2, R3
	ADDU	R2, R1, R4
	BNE	R3, small_zero

ptr_align:
	AND	$3, R1, R3
	BEQ	R3, setup
	SUBU	R1, R0, R3
	AND	$3, R3		// R3 contains number of bytes needed to align ptr