[sim] made softfloat files C instead of C++

[riscv-isa-sim.git] / softfloat / f64_sub.c

diff --git a/softfloat/f64_sub.c b/softfloat/f64_sub.c
new file mode 100755 (executable)
index 0000000..38bd574
--- /dev/null
+++ b/softfloat/f64_sub.c
@@ -0,0 +1,29 @@
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "internals.h"
+#include "softfloat.h"
+
+float64_t f64_sub( float64_t a, float64_t b )
+{
+    union ui64_f64 uA;
+    uint_fast64_t uiA;
+    bool signA;
+    union ui64_f64 uB;
+    uint_fast64_t uiB;
+    bool signB;
+    float64_t ( *magsRoutine )( uint_fast64_t, uint_fast64_t, bool );
+
+    uA.f = a;
+    uiA = uA.ui;
+    signA = signF64UI( uiA );
+    uB.f = b;
+    uiB = uB.ui;
+    signB = signF64UI( uiB );
+    magsRoutine =
+        ( signA == signB ) ? softfloat_subMagsF64 : softfloat_addMagsF64;
+    return magsRoutine( uiA, uiB, signA );
+
+}
+