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author | Andrew Waterman <waterman@s144.Millennium.Berkeley.EDU> | 2010-10-15 16:17:53 -0700 |
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committer | Andrew Waterman <waterman@s144.Millennium.Berkeley.EDU> | 2010-10-15 16:17:53 -0700 |
commit | ab928baadbfd3316988a3ad5b5d9b84693a8636f (patch) | |
tree | b464ce729d53aeff072ed2c341b06194e9ea174b /softfloat/i32_to_f64.c | |
parent | d3cb781e165427412b299b6034289b8458472790 (diff) | |
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[sim] made softfloat files C instead of C++
Diffstat (limited to 'softfloat/i32_to_f64.c')
-rwxr-xr-x | softfloat/i32_to_f64.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/softfloat/i32_to_f64.c b/softfloat/i32_to_f64.c new file mode 100755 index 0000000..d42cbe8 --- /dev/null +++ b/softfloat/i32_to_f64.c @@ -0,0 +1,31 @@ +
+#include <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "primitives.h"
+#include "internals.h"
+#include "softfloat.h"
+
+float64_t i32_to_f64( int_fast32_t a )
+{
+ uint_fast64_t uiZ;
+ bool sign;
+ uint_fast32_t absA;
+ int shiftCount;
+ union ui64_f64 uZ;
+
+ if ( ! a ) {
+ uiZ = 0;
+ } else {
+ sign = ( a < 0 );
+ absA = sign ? - a : a;
+ shiftCount = softfloat_countLeadingZeros32( absA ) + 21;
+ uiZ =
+ packToF64UI(
+ sign, 0x432 - shiftCount, (uint_fast64_t) absA<<shiftCount );
+ }
+ uZ.ui = uiZ;
+ return uZ.f;
+
+}
+
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