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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "textflag.h"
TEXT runtime∕internal∕sys·Ctz64(SB), NOSPLIT, $0-12
// Try low 32 bits.
MOVL x_lo+0(FP), AX
BSFL AX, AX
JZ tryhigh
MOVL AX, ret+8(FP)
RET
tryhigh:
// Try high 32 bits.
MOVL x_hi+4(FP), AX
BSFL AX, AX
JZ none
ADDL $32, AX
MOVL AX, ret+8(FP)
RET
none:
// No bits are set.
MOVL $64, ret+8(FP)
RET
TEXT runtime∕internal∕sys·Ctz32(SB), NOSPLIT, $0-8
MOVL x+0(FP), AX
BSFL AX, AX
JNZ 2(PC)
MOVL $32, AX
MOVL AX, ret+4(FP)
RET
TEXT runtime∕internal∕sys·Ctz8(SB), NOSPLIT, $0-8
MOVBLZX x+0(FP), AX
BSFL AX, AX
JNZ 2(PC)
MOVL $8, AX
MOVL AX, ret+4(FP)
RET
TEXT runtime∕internal∕sys·Bswap64(SB), NOSPLIT, $0-16
MOVL x_lo+0(FP), AX
MOVL x_hi+4(FP), BX
BSWAPL AX
BSWAPL BX
MOVL BX, ret_lo+8(FP)
MOVL AX, ret_hi+12(FP)
RET
TEXT runtime∕internal∕sys·Bswap32(SB), NOSPLIT, $0-8
MOVL x+0(FP), AX
BSWAPL AX
MOVL AX, ret+4(FP)
RET
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