cmp := v_0.Args[0]
			b.resetWithControl(Block386GE, cmp)
			return true
		}
		// match: (If (SETEQ cmp) yes no)
		// result: (EQ cmp yes no)
		for b.Controls[0].Op == Op386SETEQ {
			v_0 := b.Controls[0]
			cmp := v_0.Args[0]
			b.resetWithControl(Block386EQ, cmp)
			return true
		}
		// match: (If (SETNE cmp) yes no)
		// result: (NE cmp yes no)

	RET

	PCALIGN	$16
cmp4:	// 4 - 7B
	CMP	R9,$4
	BLT	cmp2
	ANDCC	$3,R9,R9
	_LWBEX	(R0)(R5),R10
	_LWBEX	(R0)(R6),R11
	_LWBEX	(R9)(R5),R12
	_LWBEX	(R9)(R6),R14
	RLDIMI	$32,R10,$0,R12
	RLDIMI	$32,R11,$0,R14
	CMPU	R12,R14
	BR	cmp0

	PCALIGN $16
cmp2:	// 2 - 3B
	CMP	R9,$2
	BLT	cmp1
	ANDCC	$1,R9,R9
	_LHBEX	(R0)(R5),R10
	_LHBEX	(R0)(R6),R11
	_LHBEX	(R9)(R5),R12

	MOVD	R12, -24(R1)
	MOVD	$1234, R10
	MOVD	R10, -32(R1)

	MOVD	$SYS_clone, R8
	SVC

	// In parent, return.
	CMP	ZR, R0
	BEQ	child
	MOVW	R0, ret+40(FP)
	RET
child:

	// In child, on new stack.
	MOVD	-32(RSP), R10
	MOVD	$1234, R0
	CMP	R0, R10
	BEQ	good
	MOVD	$0, R0
	MOVD	R0, (R0)	// crash

good:
	// Initialize m->procid to Linux tid
	MOVD	$SYS_gettid, R8

	RET

cmp4:	// Length 4 - 7
	CMPU	R4,$4
	BLT	cmp2
	MOVD	$-4,R11
	ADD	$-4,R4,R4

	_LWBEX	(R0)(R3),R10
	_LWBEX	(R11)(R9),R11
	CMPB	R10,R5,R10
	CMPB	R11,R5,R11
	CNTLZW	R10,R10
	CNTLZW	R11,R11
	CMPU	R10,$32
	CMPU	R11,$32,CR1
	SRD	$3,R10,R3
	SRD	$3,R11,R11
	BNE	found

	ADD	R4,R11,R4
	MOVD	$-1,R3
	ISEL	CR1EQ,R3,R4,R3
	RET

cmp2:	// Length 2 - 3

	SUBSW	R7@>2, R5, R16                                   // ERROR "unsupported shift operator"
	CMP	R7@>2, R5                                        // ERROR "unsupported shift operator"
	CMPW	R7@>2, R5                                        // ERROR "unsupported shift operator"
	CMN	R7@>2, R5                                        // ERROR "unsupported shift operator"
	CMNW	R7@>2, R5                                        // ERROR "unsupported shift operator"

			Goto("b1")),
		Bloc("b1",
			Valu("cmp1", OpLess64, c.config.Types.Bool, 0, nil, "arg1", "arg2"),
			If("cmp1", "b2", "b3")),
		Bloc("b2",
			Valu("cmp2", OpLess64, c.config.Types.Bool, 0, nil, "arg2", "arg3"),
			Goto("b3")),
		Bloc("b3",
			Valu("phi2", OpPhi, c.config.Types.Bool, 0, nil, "cmp1", "cmp2"),
			If("phi2", "b4", "b5")),
		Bloc("b4",
			Valu("cmp3", OpLess64, c.config.Types.Bool, 0, nil, "arg3", "arg1"),

				prog.To = a[2]
			}
		case sys.I386:
			prog.From = a[0]
			prog.AddRestSource(a[1])
			prog.To = a[2]
		case sys.PPC64:
			if arch.IsPPC64CMP(op) {
				// CMPW etc.; third argument is a CR register that goes into prog.Reg.
				prog.From = a[0]
				prog.Reg = p.getRegister(prog, op, &a[2])
				prog.To = a[1]
				break
			}

			prog.From = a[0]
			prog.To = a[2]

	BCCTRL:         "bcctrl",
	BCLR:           "bclr",
	BCLRL:          "bclrl",
	CMPW:           "cmpw",
	CMPD:           "cmpd",
	CMP:            "cmp",
	CMPWI:          "cmpwi",
	CMPDI:          "cmpdi",
	CMPI:           "cmpi",
	CMPLW:          "cmplw",
	CMPLD:          "cmpld",
	CMPL:           "cmpl",
	CMPLWI:         "cmplwi",
	CMPLDI:         "cmpldi",
	CMPLI:          "cmpli",

// Fold boolean tests into blocks
(NE (TESTB (SETL  cmp) (SETL  cmp)) yes no) => (LT  cmp yes no)
(NE (TESTB (SETLE cmp) (SETLE cmp)) yes no) => (LE  cmp yes no)
(NE (TESTB (SETG  cmp) (SETG  cmp)) yes no) => (GT  cmp yes no)
(NE (TESTB (SETGE cmp) (SETGE cmp)) yes no) => (GE  cmp yes no)
(NE (TESTB (SETEQ cmp) (SETEQ cmp)) yes no) => (EQ  cmp yes no)
(NE (TESTB (SETNE cmp) (SETNE cmp)) yes no) => (NE  cmp yes no)

	MOVQ	SP, (g_stack+stack_hi)(DI)

	// find out information about the processor we're on
	MOVL	$0, AX
	CPUID
	CMPL	AX, $0
	JE	nocpuinfo

	CMPL	BX, $0x756E6547  // "Genu"
	JNE	notintel
	CMPL	DX, $0x49656E69  // "ineI"
	JNE	notintel
	CMPL	CX, $0x6C65746E  // "ntel"
	JNE	notintel
	MOVB	$1, runtime·isIntel(SB)

notintel:
	// Load EAX=1 cpuid flags
	MOVL	$1, AX
	CPUID