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dix: use pixman for fp1616 conversions

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Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Søren Sandmann <ssp@redhat.com>>
This commit is contained in:
Peter Hutterer 2012-11-23 10:05:02 +10:00
parent 2c4388a00e
commit 59d70b30e9
1 changed files with 2 additions and 19 deletions
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21
dix/inpututils.c
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@ -910,11 +910,7 @@ input_option_set_value(InputOption *opt, const char *value)
double
fp1616_to_double(FP1616 in)
{
double ret;
ret = (double) (in >> 16);
ret += (double) (in & 0xffff) * (1.0 / (1UL << 16)); /* Optimized: ldexp((double)(in & 0xffff), -16); */
return ret;
return pixman_fixed_to_double(in);
}
double
@ -930,20 +926,7 @@ fp3232_to_double(FP3232 in)
FP1616
double_to_fp1616(double in)
{
FP1616 ret;
int32_t integral;
double tmp;
uint32_t frac_d;
tmp = floor(in);
integral = (int32_t) tmp;
tmp = (in - integral) * (1UL << 16); /* Optimized: ldexp(in - integral, 16) */
frac_d = (uint16_t) tmp;
ret = integral << 16;
ret |= frac_d & 0xffff;
return ret;
return pixman_double_to_fixed(in);
}
FP3232