47 lines
1.2 KiB
ArmAsm
47 lines
1.2 KiB
ArmAsm
/* */
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/* sections */
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.globl _read_tsc /* read the cycle counter (Pentium and up) */
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.text
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/**===========================================================================* */
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/* PUBLIC void read_tsc(unsigned long *high, unsigned long *low); */
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/* Read the cycle counter of the CPU. Pentium and up. */
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.balign 16
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_read_tsc:
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push %edx
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push %eax
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.byte 0x0f /* this is the RDTSC instruction */
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.byte 0x31 /* it places the TSC in EDX:EAX */
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push %ebp
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movl 16(%esp), %ebp
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movl %edx, (%ebp)
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movl 20(%esp), %ebp
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movl %eax, (%ebp)
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pop %ebp
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pop %eax
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pop %edx
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ret
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/**===========================================================================* */
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/* PUBLIC void read_host_time_ns(unsigned long *high, unsigned long *low); */
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/* access real time in ns from host in vmware. */
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.balign 16
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_read_host_time_ns:
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pushl %edx
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pushl %eax
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pushl %ecx
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movl $0x10001, %ecx
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.byte 0x0f /* this is the RDTSC instruction */
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.byte 0x31 /* it places the TSC in EDX:EAX */
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pushl %ebp
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movl 20(%esp), %ebp
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movl %edx, (%ebp)
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movl 24(%esp), %ebp
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movl %eax, (%ebp)
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popl %ebp
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popl %ecx
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popl %eax
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popl %edx
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ret
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