AND	$-65536, R1           // c01bffff0000
	AND	$1, R1                // c0a100000001b980001a
	ANDW	R1, R2                // 1421
	ANDW	R1, R2, R3            // b9f42031
	ANDW	$1, R1                // c01b00000001
	ANDW	$131071, R1           // a5160001
	ANDW	$65536, R1            // c01b00010000
	ANDW	$-2, R1               // a517fffe
	OR	R1, R2                // b9810021
	OR	R1, R2, R3            // b9e62031

	BYTE	$0x51
	MOVD	$·powtabi<>+0(SB), R12
	WORD	$0xE303C000	//llgc	%r0,0(%r3,%r12)
	BYTE	$0x00
	BYTE	$0x90
	SUBW	$0x1A0000, R5
	SLD	$3, R0, R3
	MOVD	$·powtm<>+0(SB), R4
	MOVH	$0x0, R8
	ANDW	$0x7FF00000, R2
	ORW	R5, R1
	WORD	$0x5A234000	//a	%r2,0(%r3,%r4)
	MOVD	$0x3FF0000000000000, R5
	RISBGZ	$40, $63, $56, R2, R3
	RISBGN	$0, $31, $32, R2, R8
	ORW	$0x45000000, R3
	MOVW	R1, R6

	"ADOXQ",
	"AESDEC",
	"AESDECLAST",
	"AESENC",
	"AESENCLAST",
	"AESIMC",
	"AESKEYGENASSIST",
	"ANDB",
	"ANDL",
	"ANDNL",
	"ANDNPD",
	"ANDNPS",
	"ANDNQ",
	"ANDPD",
	"ANDPS",
	"ANDQ",
	"ANDW",
	"ARPL",
	"BEXTRL",
	"BEXTRQ",
	"BLENDPD",
	"BLENDPS",
	"BLENDVPD",
	"BLENDVPS",
	"BLSIL",
	"BLSIQ",
	"BLSMSKL",
	"BLSMSKQ",
	"BLSRL",
	"BLSRQ",
	"BOUNDL",
	"BOUNDW",
	"BSFL",

	ADDSW R7->22, R14, R13                     // cd59872b
	ADDS R14>>7, ZR, R4                        // e41f4eab
	AND $-9223372036854775808, R1, R1          // 21004192
	ANDW $4026540031, R29, R2                  // a2430412
	AND $34903429696192636, R12, R19           // 93910e92
	ANDW R9@>7, R19, R26                       // 7a1ec90a
	AND R9@>7, R19, R26                        // 7a1ec98a
	TSTW $2863311530, R24                      // 1ff30172

TEXT	·erfcAsm(SB), NOSPLIT|NOFRAME, $0-16
	MOVD	x+0(FP), R1
	MOVD	$Neg2p11, R2
	CMPUBGT	R1, R2, usego

	FMOVD	x+0(FP), F0
	MOVD	$·erfcrodataL38<>+0(SB), R9
	FMOVD	F0, F2
	SRAD	$48, R1
	MOVH	R1, R2
	ANDW	$0x7FFF, R1
	MOVH	$Pos15, R3
	CMPW	R1, R3
	BGT	usego
	MOVH	$0x3FFF, R3
	MOVW	R1, R6
	MOVW	R3, R7
	CMPBGT	R6, R7, L2
	MOVH	$0x3FEF, R3
	MOVW	R3, R7
	CMPBGT	R6, R7, L3
	MOVH	$0x2FFF, R2

	ADD	$0x3fffffffc000, R27, R5                         // ERROR "cannot use REGTMP as source"
	AND	$0x22220000, R27, R4                             // ERROR "cannot use REGTMP as source"
	ANDW	$0x6006000060060, R27, R5                        // ERROR "cannot use REGTMP as source"
	STP	(R3, R4), 0x1234567(R27)                         // ERROR "REGTMP used in large offset store"

		op.To.Type = obj.TYPE_MEM
		op.To.Reg = v.Args[0].Reg()
	case ssa.OpS390XLANfloor, ssa.OpS390XLAOfloor:
		r := v.Args[0].Reg() // clobbered, assumed R1 in comments

		// Round ptr down to nearest multiple of 4.
		// ANDW $~3, R1
		ptr := s.Prog(s390x.AANDW)
		ptr.From.Type = obj.TYPE_CONST
		ptr.From.Offset = 0xfffffffc
		ptr.To.Type = obj.TYPE_REG
		ptr.To.Reg = r