#include "go_asm.h"
#include "textflag.h"

TEXT ·IndexByte(SB),NOSPLIT|NOFRAME,$0-40
	MOVD	b_base+0(FP), R3// b_base => R3
	MOVD	b_len+8(FP), R4 // b_len => R4
	MOVBZ	c+24(FP), R5    // c => R5
	MOVD	$ret+32(FP), R2 // &ret => R9
	BR	indexbytebody<>(SB)

TEXT ·IndexByteString(SB),NOSPLIT|NOFRAME,$0-32
	MOVD	s_base+0(FP), R3// s_base => R3
	MOVD	s_len+8(FP), R4 // s_len => R4
	MOVBZ	c+16(FP), R5    // c => R5

// experiments that differ from base. base may be nil to indicate no
// experiments. If all is true, then include all experiment flags,
// regardless of base.
func expList(exp, base *goexperiment.Flags, all bool) []string {
	var list []string
	rv := reflect.ValueOf(exp).Elem()
	var rBase reflect.Value
	if base != nil {
		rBase = reflect.ValueOf(base).Elem()
	}
	rt := rv.Type()

//	digit     = "0" ... "9" | "a" ... "z" | "A" ... "Z" .
//
// The base argument must be 0, 2, 8, 10, or 16. Providing an invalid base
// argument will lead to a run-time panic.
//
// For base 0, the number prefix determines the actual base: A prefix of
// “0b” or “0B” selects base 2, “0o” or “0O” selects base 8, and
// “0x” or “0X” selects base 16. Otherwise, the actual base is 10 and

David P. Baker <******@****.***> 1641482883 -0800

TEXT ·IndexByte(SB), NOSPLIT, $0-40
	I64Load b_base+0(FP)
	I32WrapI64
	I32Load8U c+24(FP)
	I64Load b_len+8(FP)
	I32WrapI64
	Call memchr<>(SB)
	I64ExtendI32S
	Set R0

	Get SP
	I64Const $-1
	Get R0
	I64Load b_base+0(FP)
	I64Sub
	Get R0
	I64Eqz $0
	Select
	I64Store ret+32(FP)

	RET

TEXT ·IndexByteString(SB), NOSPLIT, $0-32
	Get SP
	I64Load s_base+0(FP)
	I32WrapI64
	I32Load8U c+16(FP)

Sterling Greene <******@****.***> 1583852734 -0400

#include "textflag.h"

TEXT ·IndexByte<ABIInternal>(SB),NOSPLIT,$0-40
	// R4 = b_base
	// R5 = b_len
	// R6 = b_cap (unused)
	// R7 = byte to find
	AND	$0xff, R7
	MOVV	R4, R6		// store base for later
	ADDV	R4, R5		// end
	ADDV	$-1, R4

	PCALIGN	$16
loop:
	ADDV	$1, R4
	BEQ	R4, R5, notfound
	MOVBU	(R4), R8
	BNE	R7, R8, loop

	SUBV	R6, R4		// remove base
	RET

notfound:
	MOVV	$-1, R4
	RET

#include "go_asm.h"
#include "textflag.h"

TEXT ·IndexByte(SB),NOSPLIT,$0-20
	MOVW	b_base+0(FP), R0
	MOVW	b_len+4(FP), R1
	MOVBU	c+12(FP), R2	// byte to find
	MOVW	$ret+16(FP), R5
	B	indexbytebody<>(SB)

TEXT ·IndexByteString(SB),NOSPLIT,$0-16
	MOVW	s_base+0(FP), R0
	MOVW	s_len+4(FP), R1
	MOVBU	c+8(FP), R2	// byte to find
	MOVW	$ret+12(FP), R5
	B	indexbytebody<>(SB)

// input:

#include "textflag.h"

TEXT ·IndexByte(SB),NOSPLIT,$0-20
	MOVW	b_base+0(FP), R1
	MOVW	b_len+4(FP), R2
	MOVBU	c+12(FP), R3	// byte to find
	ADDU	$1, R1, R4	// store base+1 for later
	ADDU	R1, R2	// end

loop:
	BEQ	R1, R2, notfound
	MOVBU	(R1), R5
	ADDU	$1, R1
	BNE	R3, R5, loop

	SUBU	R4, R1	// R1 will be one beyond the position we want so remove (base+1)
	MOVW	R1, ret+16(FP)
	RET

notfound:
	MOVW	$-1, R1

	_ = x[_Lbrace-13]
	_ = x[_Rparen-14]
	_ = x[_Rbrack-15]
	_ = x[_Rbrace-16]
	_ = x[_Comma-17]
	_ = x[_Semi-18]
	_ = x[_Colon-19]
	_ = x[_Dot-20]
	_ = x[_DotDotDot-21]
	_ = x[_Break-22]
	_ = x[_Case-23]
	_ = x[_Chan-24]
	_ = x[_Const-25]
	_ = x[_Continue-26]
	_ = x[_Default-27]
	_ = x[_Defer-28]
	_ = x[_Else-29]
	_ = x[_Fallthrough-30]
	_ = x[_For-31]
	_ = x[_Func-32]
	_ = x[_Go-33]