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runtime: fix linux/arm nanotime?
TBR=r CC=golang-dev https://golang.org/cl/5354041
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@ -130,28 +130,25 @@ TEXT runtime·mincore(SB),7,$0
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// int64 nanotime(void) so really
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// void nanotime(int64 *nsec)
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TEXT runtime·nanotime(SB),7,$32
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/* dummy version - return 0,0 */
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MOVW $0, R1
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MOVW 0(FP), R0
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MOVW R1, 0(R0)
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MOVW R1, 4(R0)
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/*
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attempt at real version - seg faults
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MOVW $8(SP), R0
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MOVW $0, R1
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MOVW $8(R13), R0 // timeval
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MOVW $0, R1 // zone
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MOVW $SYS_gettimeofday, R7
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SWI $0
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MOVW 0(FP), R0 // sec
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MOVW 8(SP), R1
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MOVW R1, 0(R0)
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MOVW 4(FP), R0 // usec
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MOVW 12(SP), R1
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MOVW R1, 0(R0)
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*/
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MOVW 8(R13), R0 // sec
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MOVW 12(R13), R2 // usec
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MOVW $1000000000, R3
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MULLU R0, R3, (R1, R0)
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MOVW $1000, R3
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MOVW $0, R4
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MUL R3, R2
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ADD.S R2, R0
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ADC R4, R1
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MOVW 0(FP), R3
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MOVW R0, 0(R3)
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MOVW R1, 4(R3)
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RET
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// int32 futex(int32 *uaddr, int32 op, int32 val,
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