LDREXD	(R11), R12    // 9fcfbbe1
	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

	// #include <stdlib.h>
	//
	// static void myprint(char* s) {
	//   printf("%s\n", s);
	// }
	import "C"
	import "unsafe"

	func main() {
		cs := C.CString("Hello from stdio")
		C.myprint(cs)
		C.free(unsafe.Pointer(cs))
	}

A few special functions convert between Go and C types
by making copies of the data. In pseudo-Go definitions:

	// Go string to C string

	"S":  arm.C_SBIT,
	"W":  arm.C_WBIT,
	"P":  arm.C_PBIT,
	"PW": arm.C_WBIT | arm.C_PBIT,
	"WP": arm.C_WBIT | arm.C_PBIT,
}

var armSCOND = map[string]uint8{
	"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,

			arm64SpecialOperand[opd.String()] = opd
		}

		// Handle some special cases.
		specialMapping := map[string]arm64.SpecialOperand{
			// The internal representation of CS(CC) and HS(LO) are the same.
			"CS": arm64.SPOP_HS,
			"CC": arm64.SPOP_LO,
		}
		for s, opd := range specialMapping {
			arm64SpecialOperand[s] = opd
		}
	}
	if opd, ok := arm64SpecialOperand[name]; ok {
		return opd
	}

	B	0(PC)    // JMP 0(PC)  // feffffea
jmp_label_1:
	B	jmp_label_1 // JMP     // feffffea

// BL
	BL.EQ	14(PC) // CALL.EQ 14(PC)   // 0c00000b
	BL.NE	13(PC) // CALL.NE 13(PC)   // 0b00001b
	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

	cs := "你好世界, hello world. 你好世界, hello world. 你好世界, hello world."
	for k := 1; k <= 2048; k <<= 4 {
		for j := 1; j <= 64; j <<= 1 {
			b.Run(fmt.Sprintf("%d:%d", k, j), func(b *testing.B) {
				for i := 0; i < b.N; i++ {
					LastIndexAny(x[:k], cs[:j])
				}
			})
		}
	}
}

func BenchmarkTrimASCII(b *testing.B) {
	cs := "0123456789abcdef"
	for k := 1; k <= 4096; k <<= 4 {

	CSET	GT, R1	        // e1d79f9a
	CSETW	HI, R2	        // e2979f1a
	CSEL	LT, R1, R2, ZR	// 3fb0829a
	CSELW	LT, R2, R3, R4	// 44b0831a
	CSINC	GT, R1, ZR, R3	// 23c49f9a
	CSNEG	MI, R1, R2, R3	// 234482da
	CSINV	CS, R1, R2, R3	// CSINV	HS, R1, R2, R3 // 232082da
	CSINV	HS, R1, R2, R3	// 232082da
	CSINVW	MI, R2, ZR, R2	// 42409f5a
	CINC	EQ, R4, R9	// 8914849a
	CINCW	PL, R2, ZR	// 5f44821a
	CINV	PL, R11, R22	// 76418bda

pkg debug/macho, type Regs386 struct
pkg debug/macho, type Regs386 struct, AX uint32
pkg debug/macho, type Regs386 struct, BP uint32
pkg debug/macho, type Regs386 struct, BX uint32
pkg debug/macho, type Regs386 struct, CS uint32
pkg debug/macho, type Regs386 struct, CX uint32
pkg debug/macho, type Regs386 struct, DI uint32
pkg debug/macho, type Regs386 struct, DS uint32
pkg debug/macho, type Regs386 struct, DX uint32

	NEGS	R7@>2, R5                                        // ERROR "unsupported shift operator"
	NEGSW	R7@>2, R5                                        // ERROR "unsupported shift operator"
	CINC	CS, R2, R3, R4                                   // ERROR "illegal combination"
	CSEL	LT, R1, R2                                       // ERROR "illegal combination"