[sim] added SoftFloat-3 source

[riscv-isa-sim.git] / softfloat / SoftFloat-3 / source / i64_to_f64.c

diff --git a/softfloat/SoftFloat-3/source/i64_to_f64.c b/softfloat/SoftFloat-3/source/i64_to_f64.c
new file mode 100755 (executable)
index 0000000..1add960
--- /dev/null
+++ b/softfloat/SoftFloat-3/source/i64_to_f64.c
@@ -0,0 +1,21 @@
+\r
+#include <stdbool.h>\r
+#include <stdint.h>\r
+#include "platform.h"\r
+#include "internals.h"\r
+#include "softfloat.h"\r
+\r
+float64_t i64_to_f64( int_fast64_t a )\r
+{\r
+    bool sign;\r
+    union ui64_f64 uZ;\r
+\r
+    sign = ( a < 0 );\r
+    if ( ! ( a & UINT64_C( 0x7FFFFFFFFFFFFFFF ) ) ) {\r
+        uZ.ui = sign ? packToF64UI( 1, 0x43E, 0 ) : 0;\r
+        return uZ.f;\r
+    }\r
+    return softfloat_normRoundPackToF64( sign, 0x43C, sign ? - a : a );\r
+\r
+}\r
+\r