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author | Andrew Waterman <waterman@s141.Millennium.Berkeley.EDU> | 2011-06-19 20:47:29 -0700 |
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committer | Andrew Waterman <waterman@s141.Millennium.Berkeley.EDU> | 2011-06-19 20:47:29 -0700 |
commit | 77452a26e7d95d29dbaa797595ae683f03a3345b (patch) | |
tree | e7aaae682f73a20ceb4d3366528b0cd38378f49d /softfloat/f64_to_ui64.c | |
parent | 740f981cfd55604d46598144dccac26dd53f643c (diff) | |
download | spike-77452a26e7d95d29dbaa797595ae683f03a3345b.zip spike-77452a26e7d95d29dbaa797595ae683f03a3345b.tar.gz spike-77452a26e7d95d29dbaa797595ae683f03a3345b.tar.bz2 |
temporary undoing of renaming
Diffstat (limited to 'softfloat/f64_to_ui64.c')
-rwxr-xr-x | softfloat/f64_to_ui64.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/softfloat/f64_to_ui64.c b/softfloat/f64_to_ui64.c new file mode 100755 index 0000000..9afebd7 --- /dev/null +++ b/softfloat/f64_to_ui64.c @@ -0,0 +1,41 @@ +
+#include <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "primitives.h"
+#include "internals.h"
+#include "softfloat.h"
+
+uint_fast64_t f64_to_ui64( float64_t a, int_fast8_t roundingMode, bool exact )
+{
+ union ui64_f64 uA;
+ uint_fast64_t uiA;
+ bool sign;
+ int_fast16_t exp;
+ uint_fast64_t sig;
+ int_fast16_t shiftCount;
+ struct uint64_extra sigExtra;
+
+ uA.f = a;
+ uiA = uA.ui;
+ sign = signF64UI( uiA );
+ exp = expF64UI( uiA );
+ sig = fracF64UI( uiA );
+ if ( exp ) sig |= UINT64_C( 0x0010000000000000 );
+ shiftCount = 0x433 - exp;
+ if ( shiftCount <= 0 ) {
+ if ( 0x43E < exp ) {
+ softfloat_raiseFlags( softfloat_flag_invalid );
+ return UINT64_C( 0xFFFFFFFFFFFFFFFF );
+ }
+ sigExtra.v = sig<<( - shiftCount );
+ sigExtra.extra = 0;
+ } else {
+ sigExtra = softfloat_shift64ExtraRightJam( sig, 0, shiftCount );
+ }
+ return
+ softfloat_roundPackToUI64(
+ sign, sigExtra.v, sigExtra.extra, roundingMode, exact );
+
+}
+
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