[Mesa-dev] [Bug 83570] Glyphy demo throws unhandled Integer division by zero exception
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Mon Sep 8 13:07:09 PDT 2014
https://bugs.freedesktop.org/show_bug.cgi?id=83570
--- Comment #11 from Roland Scheidegger <sroland at vmware.com> ---
(In reply to comment #10)
> Could be totally borked, but this is what I have at the moment:
>
> if (type.floating) {
> return LLVMBuildFDiv(builder, a, b, "");
> }
> else {
> //The spec says divide by zero is undefined, but shouldn't throw an
> exception
> LLVMValueRef zeromask = lp_build_cmp(bld,
> PIPE_FUNC_EQUAL,
> b,
> lp_build_zero(bld->gallivm,type));
> if (type.sign) {
> return lp_build_select(bld,
> zeromask,
> bld->undef,
> LLVMBuildSDiv(builder, a, b, ""));
> }
> else {
> return lp_build_select(bld,
> zeromask,
> bld->undef,
> LLVMBuildUDiv(builder, a, b, ""));
> }
> }
>
> I'll take a look at udiv_emit_cpu
Hmm that can't quite work since you still do the division by zero, you just
don't use the result in the end.
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