1 files changed, 52 insertions, 0 deletions
diff --git a/softfloat/s_roundPackToI64.c b/softfloat/s_roundPackToI64.c
new file mode 100755
index 0000000..b2f5d63
--- /dev/null
+++ b/softfloat/s_roundPackToI64.c
@@ -0,0 +1,52 @@
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "internals.h"
+#include "softfloat.h"
+
+int_fast64_t
+ softfloat_roundPackToI64(
+     bool sign,
+     uint_fast64_t sig64,
+     uint_fast64_t sig0,
+     int_fast8_t roundingMode,
+     bool exact
+ )
+{
+    bool roundNearestEven, increment;
+    union { uint64_t ui; int64_t i; } uZ;
+    int_fast64_t z;
+
+    roundNearestEven = ( roundingMode == softfloat_round_nearest_even );
+    increment = ( UINT64_C( 0x8000000000000000 ) <= sig0 );
+    if (
+           ! roundNearestEven
+        && ( roundingMode != softfloat_round_nearest_maxMag )
+    ) {
+        increment =
+               ( roundingMode != softfloat_round_minMag )
+            && ( roundingMode
+                     == ( sign ? softfloat_round_min : softfloat_round_max ) )
+            && sig0;
+    }
+    if ( increment ) {
+        ++sig64;
+        if ( ! sig64 ) goto invalid;
+        sig64 &=
+            ~ ( ! ( sig0 & UINT64_C( 0x7FFFFFFFFFFFFFFF ) )
+                    & roundNearestEven );
+    }
+    uZ.ui = sign ? - sig64 : sig64;
+    z = uZ.i;
+    if ( z && ( ( z < 0 ) ^ sign ) ) goto invalid;
+    if ( exact && sig0 ) softfloat_exceptionFlags |= softfloat_flag_inexact;
+    return z;
+ invalid:
+    softfloat_raiseFlags( softfloat_flag_invalid );
+    return
+        sign ? - INT64_C( 0x7FFFFFFFFFFFFFFF ) - 1
+            : INT64_C( 0x7FFFFFFFFFFFFFFF );
+
+}
+