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| author | Andrew Waterman <waterman@s141.Millennium.Berkeley.EDU> | 2010-08-17 17:10:28 -0700 |
|---|---|---|
| committer | Andrew Waterman <waterman@s141.Millennium.Berkeley.EDU> | 2010-08-17 17:10:28 -0700 |
| commit | 932ec48ad574b31e964a7a5bf2e74138b334d731 (patch) | |
| tree | 2a8b39b03243ff8e80a261efd4c6cd517692322f /softfloat/SoftFloat-3/source/f32_to_i64.c | |
| parent | 2d75bf71bb3990f5a718ddca3c99f9139c03c10b (diff) | |
| download | spike-932ec48ad574b31e964a7a5bf2e74138b334d731.zip spike-932ec48ad574b31e964a7a5bf2e74138b334d731.tar.gz spike-932ec48ad574b31e964a7a5bf2e74138b334d731.tar.bz2 | |
[sim] added SoftFloat-3 source
Diffstat (limited to 'softfloat/SoftFloat-3/source/f32_to_i64.c')
| -rwxr-xr-x | softfloat/SoftFloat-3/source/f32_to_i64.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/softfloat/SoftFloat-3/source/f32_to_i64.c b/softfloat/SoftFloat-3/source/f32_to_i64.c new file mode 100755 index 0000000..c0b8981 --- /dev/null +++ b/softfloat/SoftFloat-3/source/f32_to_i64.c @@ -0,0 +1,44 @@ +
+#include <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "primitives.h"
+#include "internals.h"
+#include "softfloat.h"
+
+int_fast64_t f32_to_i64( float32_t a, int_fast8_t roundingMode, bool exact )
+{
+ union ui32_f32 uA;
+ uint_fast32_t uiA;
+ bool sign;
+ int_fast16_t exp;
+ uint_fast32_t sig;
+ int_fast16_t shiftCount;
+ uint_fast64_t sig64, extra;
+ struct uint64_extra sig64Extra;
+
+ uA.f = a;
+ uiA = uA.ui;
+ sign = signF32UI( uiA );
+ exp = expF32UI( uiA );
+ sig = fracF32UI( uiA );
+ shiftCount = 0xBE - exp;
+ if ( shiftCount < 0 ) {
+ softfloat_raiseFlags( softfloat_flag_invalid );
+ if ( ! sign || ( ( exp == 0xFF ) && sig ) ) {
+ return INT64_C( 0x7FFFFFFFFFFFFFFF );
+ }
+ return - INT64_C( 0x7FFFFFFFFFFFFFFF ) - 1;
+ }
+ if ( exp ) sig |= 0x00800000;
+ sig64 = (uint_fast64_t) sig<<40;
+ extra = 0;
+ if ( shiftCount ) {
+ sig64Extra = softfloat_shift64ExtraRightJam( sig64, 0, shiftCount );
+ sig64 = sig64Extra.v;
+ extra = sig64Extra.extra;
+ }
+ return softfloat_roundPackToI64( sign, sig64, extra, roundingMode, exact );
+
+}
+
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