switch name {
	case "CR":
		if 0 <= n && n <= 7 {
			return ppc64.REG_CR0 + n, true
		}
	case "A":
		if 0 <= n && n <= 8 {
			return ppc64.REG_A0 + n, true
		}
	case "VS":
		if 0 <= n && n <= 63 {
			return ppc64.REG_VS0 + n, true
		}
	case "V":
		if 0 <= n && n <= 31 {
			return ppc64.REG_V0 + n, true
		}
	case "F":
		if 0 <= n && n <= 31 {
			return ppc64.REG_F0 + n, true

	MOVB	$-128, -524288(R5)    // eb8050008052
	MOVB	$1, -524289(R6)       // c0a1fff7ffff41aa60009201a000

	// RX (12-bit displacement) and RXY (20-bit displacement) instruction encoding (e.g: ST vs STY)
	MOVW	R1, 4095(R2)(R3)       // 50132fff
	MOVW	R1, 4096(R2)(R3)       // e31320000150
	MOVWZ	R1, 4095(R2)(R3)       // 50132fff
	MOVWZ	R1, 4096(R2)(R3)       // e31320000150
	MOVH	R1, 4095(R2)(R3)       // 40132fff

	// "VMOVQ r/m64, xmm1"/6E vs "VMOVQ xmm2/m64, xmm1"/7E with mem operand.
	VMOVQ (AX), X20           // 62e1fd086e20 or 62e1fe087e20
	VMOVQ 7(DX), X20          // 62e1fd086ea207000000 or 62e1fe087ea207000000
	VMOVQ -15(R11)(CX*1), X20 // 62c1fd086ea40bf1ffffff or 62c1fe087ea40bf1ffffff
	VMOVQ (SP)(AX*2), X20     // 62e1fd086e2444 or 62e1fe087e2444
	// "VMOVQ xmm1, r/m64"/7E vs "VMOVQ xmm1, xmm2/m64"/D6 with mem operand.

	}

	newID := id[:strings.LastIndex(id, "/")] + "/" + buildid.HashToString(hash)
	if len(newID) != len(id) {
		log.Fatalf("%s: build ID length mismatch %q vs %q", file, id, newID)
	}

	if len(matches) == 0 {
		return
	}

	f, err = os.OpenFile(file, os.O_RDWR, 0)
	if err != nil {
		log.Fatal(err)
	}
	if err := buildid.Rewrite(f, matches, newID); err != nil {

	"EQ":  arm.C_SCOND_EQ,
	"NE":  arm.C_SCOND_NE,
	"CS":  arm.C_SCOND_HS,
	"HS":  arm.C_SCOND_HS,
	"CC":  arm.C_SCOND_LO,
	"LO":  arm.C_SCOND_LO,
	"MI":  arm.C_SCOND_MI,
	"PL":  arm.C_SCOND_PL,
	"VS":  arm.C_SCOND_VS,
	"VC":  arm.C_SCOND_VC,
	"HI":  arm.C_SCOND_HI,
	"LS":  arm.C_SCOND_LS,
	"GE":  arm.C_SCOND_GE,
	"LT":  arm.C_SCOND_LT,
	"GT":  arm.C_SCOND_GT,
	"LE":  arm.C_SCOND_LE,
	"AL":  arm.C_SCOND_NONE,

			t.Skip("skipping failing test on alpine - go.dev/issue/19938")
		}
	}

	// Launch some threads in C.
	const cts = 5
	C.trial(cts)
	defer C.cleanup()

	vs := []struct {
		call           string
		fn             func() error
		filter, expect string
	}{
		{call: "Setegid(1)", fn: func() error { return syscall.Setegid(1) }, filter: "Gid:", expect: "\t0\t1\t0\t1"},

	CINCW LO, R27, R14                         // 6e279b1a
	CINCW HS, R27, ZR                          // 7f379b1a
	CINVW EQ, R2, R17                          // 5110825a
	CINV VS, R12, R7                           // 87718cda
	CINV VS, R30, R30                          // de739eda
	CLREX $4                                   // 5f3403d5
	CLREX $0                                   // 5f3003d5

	STREX	R3, (R4), R5  // STREX  (R4), R3, R5 // 935f84e1
	STREXD	R8, (R9), g   // STREXD (R9), R8, g  // 98afa9e1

	CMPF    F8, F9        // c89ab4ee10faf1ee
	CMPD.CS F4, F5        // c45bb42e10faf12e
	CMPF.VS F7            // c07ab56e10faf16e
	CMPD    F6            // c06bb5ee10faf1ee

	MOVW	R4, F8        // 104b08ee
	MOVW	F4, R8        // 108b14ee

	MOVF	(R4), F9                                  // 009a94ed

	BL.CS	12(PC) // CALL.CS 12(PC)   // 0a00002b
	BL.CC	11(PC) // CALL.CC 11(PC)   // 0900003b
	BL.MI	10(PC) // CALL.MI 10(PC)   // 0800004b
	BL.PL	9(PC)  // CALL.PL 9(PC)    // 0700005b
	BL.VS	8(PC)  // CALL.VS 8(PC)    // 0600006b
	BL.VC	7(PC)  // CALL.VC 7(PC)    // 0500007b
	BL.HI	6(PC)  // CALL.HI 6(PC)    // 0400008b
	BL.LS	5(PC)  // CALL.LS 5(PC)    // 0300009b
	BL.GE	4(PC)  // CALL.GE 4(PC)    // 020000ab

//
// Note that the specific integers used to identify the
// specific tagged classes can and will change from release
// to release (that's why this stuff is in CF*Internal*.h),
// as can the definition of type info vs payload above.
//
#if __LP64__
#define CF_IS_TAGGED_OBJ(PTR)	((uintptr_t)(PTR) & 0x1)
#define CF_TAGGED_OBJ_TYPE(PTR)	((uintptr_t)(PTR) & 0xF)
#else
#define CF_IS_TAGGED_OBJ(PTR)	0