Mercurial > hg > graal-compiler
diff src/share/vm/utilities/globalDefinitions.hpp @ 20287:b6a8cc1e0d92
8040121: Load variable through a pointer of an incompatible type in src/hotspot/src/share/vm: opto/output.cpp, runtime/sharedRuntimeTrans.cpp, utilities/globalDefinitions_visCPP.hpp
Summary: Fixed parfait warnings in globalDefinitions files by using a union for casts.
Reviewed-by: kvn
| author | thartmann |
|---|---|
| date | Tue, 29 Jul 2014 13:54:16 +0200 |
| parents | 78bbf4d43a14 |
| children | 7848fc12602b |
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--- a/src/share/vm/utilities/globalDefinitions.hpp Thu May 22 11:36:23 2014 -0400 +++ b/src/share/vm/utilities/globalDefinitions.hpp Tue Jul 29 13:54:16 2014 +0200 @@ -558,6 +558,27 @@ return fabs(value); } +//---------------------------------------------------------------------------------------------------- +// Special casts +// Cast floats into same-size integers and vice-versa w/o changing bit-pattern +typedef union { + jfloat f; + jint i; +} FloatIntConv; + +typedef union { + jdouble d; + jlong l; + julong ul; +} DoubleLongConv; + +inline jint jint_cast (jfloat x) { return ((FloatIntConv*)&x)->i; } +inline jfloat jfloat_cast (jint x) { return ((FloatIntConv*)&x)->f; } + +inline jlong jlong_cast (jdouble x) { return ((DoubleLongConv*)&x)->l; } +inline julong julong_cast (jdouble x) { return ((DoubleLongConv*)&x)->ul; } +inline jdouble jdouble_cast (jlong x) { return ((DoubleLongConv*)&x)->d; } + inline jint low (jlong value) { return jint(value); } inline jint high(jlong value) { return jint(value >> 32); }