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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/f64_to_i64.c | |
| parent | 2d75bf71bb3990f5a718ddca3c99f9139c03c10b (diff) | |
| download | riscv-isa-sim-932ec48ad574b31e964a7a5bf2e74138b334d731.zip riscv-isa-sim-932ec48ad574b31e964a7a5bf2e74138b334d731.tar.gz riscv-isa-sim-932ec48ad574b31e964a7a5bf2e74138b334d731.tar.bz2 | |
[sim] added SoftFloat-3 source
Diffstat (limited to 'softfloat/SoftFloat-3/source/f64_to_i64.c')
| -rwxr-xr-x | softfloat/SoftFloat-3/source/f64_to_i64.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/softfloat/SoftFloat-3/source/f64_to_i64.c b/softfloat/SoftFloat-3/source/f64_to_i64.c new file mode 100755 index 0000000..89663ee --- /dev/null +++ b/softfloat/SoftFloat-3/source/f64_to_i64.c @@ -0,0 +1,46 @@ +
+#include <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "primitives.h"
+#include "internals.h"
+#include "softfloat.h"
+
+int_fast64_t f64_to_i64( 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
+ ! sign
+ || ( ( exp == 0x7FF )
+ && ( sig != UINT64_C( 0x0010000000000000 ) ) )
+ ? INT64_C( 0x7FFFFFFFFFFFFFFF )
+ : - INT64_C( 0x7FFFFFFFFFFFFFFF ) - 1;
+ }
+ sigExtra.v = sig<<( - shiftCount );
+ sigExtra.extra = 0;
+ } else {
+ sigExtra = softfloat_shift64ExtraRightJam( sig, 0, shiftCount );
+ }
+ return
+ softfloat_roundPackToI64(
+ sign, sigExtra.v, sigExtra.extra, roundingMode, exact );
+
+}
+
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