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

[riscv-isa-sim.git] / softfloat / f32_to_i64.c

diff --git a/softfloat/f32_to_i64.c b/softfloat/f32_to_i64.c
new file mode 100755 (executable)
index 0000000..c0b8981
--- /dev/null
+++ b/softfloat/f32_to_i64.c
@@ -0,0 +1,44 @@
+\r
+#include <stdbool.h>\r
+#include <stdint.h>\r
+#include "platform.h"\r
+#include "primitives.h"\r
+#include "internals.h"\r
+#include "softfloat.h"\r
+\r
+int_fast64_t f32_to_i64( float32_t a, int_fast8_t roundingMode, bool exact )\r
+{\r
+    union ui32_f32 uA;\r
+    uint_fast32_t uiA;\r
+    bool sign;\r
+    int_fast16_t exp;\r
+    uint_fast32_t sig;\r
+    int_fast16_t shiftCount;\r
+    uint_fast64_t sig64, extra;\r
+    struct uint64_extra sig64Extra;\r
+\r
+    uA.f = a;\r
+    uiA = uA.ui;\r
+    sign = signF32UI( uiA );\r
+    exp = expF32UI( uiA );\r
+    sig = fracF32UI( uiA );\r
+    shiftCount = 0xBE - exp;\r
+    if ( shiftCount < 0 ) {\r
+        softfloat_raiseFlags( softfloat_flag_invalid );\r
+        if ( ! sign || ( ( exp == 0xFF ) && sig ) ) {\r
+            return INT64_C( 0x7FFFFFFFFFFFFFFF );\r
+        }\r
+        return - INT64_C( 0x7FFFFFFFFFFFFFFF ) - 1;\r
+    }\r
+    if ( exp ) sig |= 0x00800000;\r
+    sig64 = (uint_fast64_t) sig<<40;\r
+    extra = 0;\r
+    if ( shiftCount ) {\r
+        sig64Extra = softfloat_shift64ExtraRightJam( sig64, 0, shiftCount );\r
+        sig64 = sig64Extra.v;\r
+        extra = sig64Extra.extra;\r
+    }\r
+    return softfloat_roundPackToI64( sign, sig64, extra, roundingMode, exact );\r
+\r
+}\r
+\r