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target-alpha: Suppress underflow from CVTTQ if DNZ

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I.e. respect flush_inputs_to_zero.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2014-07-08 10:14:09 -07:00
parent b99e80694c
commit 4ed069ab53
1 changed files with 1 additions and 1 deletions
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target-alpha/fpu_helper.c
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@ -452,7 +452,7 @@ static uint64_t do_cvttq(CPUAlphaState *env, uint64_t a, int roundmode)
frac = a & 0xfffffffffffffull; frac = a & 0xfffffffffffffull;
if (exp == 0) { if (exp == 0) {
if (unlikely(frac != 0)) { if (unlikely(frac != 0) && !env->fp_status.flush_inputs_to_zero) {
goto do_underflow; goto do_underflow;
} }
} else if (exp == 0x7ff) { } else if (exp == 0x7ff) {