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Fix time scaling in PLI TF routines for MinGW. 

When built with MinGW, pow() may not always generate an exact integer
result when supplied with integer operands. Converting the result to an
integer before we use it seems to be enough to work round this issue.
This commit is contained in:
Martin Whitaker 2012-08-05 11:37:13 +01:00 committed by Cary R
parent 693574107b
commit cd029fe35d
1 changed files with 11 additions and 2 deletions
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11
libveriuser/getsimtime.c
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@ -29,6 +29,15 @@
* some TF time routines implemented using VPI interface
*/
// On some platforms (e.g. MinGW), pow() may not always generate an
// exact integer result when supplied with integer operands. Converting
// the result to an integer before we use it seems to be enough to work
// round this issue.
static ivl_u64_t pow10u(PLI_INT32 val)
{
return (ivl_u64_t)pow(10, val);
}
static ivl_u64_t
scale(int high, int low, void*obj) {
vpiHandle hand = vpi_handle(vpiScope, vpi_handle(vpiSysTfCall,0));
@ -36,7 +45,7 @@ scale(int high, int low, void*obj) {
scaled = high;
scaled = (scaled << 32) | low;
scaled /= pow(10, vpi_get(vpiTimeUnit,obj ? (vpiHandle)obj : hand) -
scaled /= pow10u(vpi_get(vpiTimeUnit,obj ? (vpiHandle)obj : hand) -
vpi_get(vpiTimePrecision,0));
return scaled;