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| author | Andrew Waterman <waterman@s144.Millennium.Berkeley.EDU> | 2010-10-15 16:17:53 -0700 |
|---|---|---|
| committer | Andrew Waterman <waterman@s144.Millennium.Berkeley.EDU> | 2010-10-15 16:17:53 -0700 |
| commit | ab928baadbfd3316988a3ad5b5d9b84693a8636f (patch) | |
| tree | b464ce729d53aeff072ed2c341b06194e9ea174b /softfloat/f64_to_i32.c | |
| parent | d3cb781e165427412b299b6034289b8458472790 (diff) | |
| download | spike-ab928baadbfd3316988a3ad5b5d9b84693a8636f.zip spike-ab928baadbfd3316988a3ad5b5d9b84693a8636f.tar.gz spike-ab928baadbfd3316988a3ad5b5d9b84693a8636f.tar.bz2 | |
[sim] made softfloat files C instead of C++
Diffstat (limited to 'softfloat/f64_to_i32.c')
| -rwxr-xr-x | softfloat/f64_to_i32.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/softfloat/f64_to_i32.c b/softfloat/f64_to_i32.c new file mode 100755 index 0000000..0778a86 --- /dev/null +++ b/softfloat/f64_to_i32.c @@ -0,0 +1,30 @@ +
+#include <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "primitives.h"
+#include "internals.h"
+#include "softfloat.h"
+
+int_fast32_t f64_to_i32( 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;
+
+ uA.f = a;
+ uiA = uA.ui;
+ sign = signF64UI( uiA );
+ exp = expF64UI( uiA );
+ sig = fracF64UI( uiA );
+ if ( ( exp == 0x7FF ) && sig ) sign = 0;
+ if ( exp ) sig |= UINT64_C( 0x0010000000000000 );
+ shiftCount = 0x42C - exp;
+ if ( 0 < shiftCount ) sig = softfloat_shift64RightJam( sig, shiftCount );
+ return softfloat_roundPackToI32( sign, sig, roundingMode, exact );
+
+}
+
|