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runtime: fix linux/arm nanotime?

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TBR=r
CC=golang-dev
https://golang.org/cl/5354041
This commit is contained in:
Russ Cox 2011-11-04 08:38:10 -04:00
parent e73680aec0
commit 7f5ae484eb
1 changed files with 17 additions and 20 deletions
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33
src/pkg/runtime/linux/arm/sys.s
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@ -130,28 +130,25 @@ TEXT runtime·mincore(SB),7,$0
// int64 nanotime(void) so really
// void nanotime(int64 *nsec)
TEXT runtime·nanotime(SB),7,$32
/* dummy version - return 0,0 */
MOVW $0, R1
MOVW 0(FP), R0
MOVW R1, 0(R0)
MOVW R1, 4(R0)
/*
attempt at real version - seg faults
MOVW $8(SP), R0
MOVW $0, R1
MOVW $8(R13), R0 // timeval
MOVW $0, R1 // zone
MOVW $SYS_gettimeofday, R7
SWI $0
MOVW 0(FP), R0 // sec
MOVW 8(SP), R1
MOVW R1, 0(R0)
MOVW 8(R13), R0 // sec
MOVW 12(R13), R2 // usec
MOVW 4(FP), R0 // usec
MOVW 12(SP), R1
MOVW R1, 0(R0)
*/
MOVW $1000000000, R3
MULLU R0, R3, (R1, R0)
MOVW $1000, R3
MOVW $0, R4
MUL R3, R2
ADD.S R2, R0
ADC R4, R1
MOVW 0(FP), R3
MOVW R0, 0(R3)
MOVW R1, 4(R3)
RET
// int32 futex(int32 *uaddr, int32 op, int32 val,