builtins: Expand out floating point exponents for MSVC
MSVC 2013 doesnt support C99 fully, including the hexidecimal floating point
representation. Use the expanded value to permit building with it.
Patch by Tee Hao Wei!
llvm-svn: 250365
diff --git a/compiler-rt/lib/builtins/floatundidf.c b/compiler-rt/lib/builtins/floatundidf.c
index 73b8bac..67aa86e 100644
--- a/compiler-rt/lib/builtins/floatundidf.c
+++ b/compiler-rt/lib/builtins/floatundidf.c
@@ -32,9 +32,9 @@
COMPILER_RT_ABI double
__floatundidf(du_int a)
{
- static const double twop52 = 0x1.0p52;
- static const double twop84 = 0x1.0p84;
- static const double twop84_plus_twop52 = 0x1.00000001p84;
+ static const double twop52 = 4503599627370496.0; // 0x1.0p52
+ static const double twop84 = 19342813113834066795298816.0; // 0x1.0p84
+ static const double twop84_plus_twop52 = 19342813118337666422669312.0; // 0x1.00000001p84
union { uint64_t x; double d; } high = { .d = twop84 };
union { uint64_t x; double d; } low = { .d = twop52 };