1 files changed, 65 insertions, 0 deletions
diff --git a/softfloat/s_roundPackToF32.c b/softfloat/s_roundPackToF32.c
new file mode 100755
index 0000000..11764f1
--- /dev/null
+++ b/softfloat/s_roundPackToF32.c
@@ -0,0 +1,65 @@
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "primitives.h"
+#include "internals.h"
+#include "softfloat.h"
+
+float32_t
+ softfloat_roundPackToF32( bool sign, int_fast16_t exp, uint_fast32_t sig )
+{
+    int roundingMode;
+    bool roundNearestEven;
+    int roundIncrement, roundBits;
+    bool isTiny;
+    uint_fast32_t uiZ;
+    union ui32_f32 uZ;
+
+    roundingMode = softfloat_roundingMode;
+    roundNearestEven = ( roundingMode == softfloat_round_nearest_even );
+    roundIncrement = 0x40;
+    if (
+           ! roundNearestEven
+        && ( roundingMode != softfloat_round_nearest_maxMag )
+    ) {
+        roundIncrement =
+               ( roundingMode == softfloat_round_minMag )
+            || ( roundingMode
+                     == ( sign ? softfloat_round_max : softfloat_round_min ) )
+                ? 0
+                : 0x7F;
+    }
+    roundBits = sig & 0x7F;
+    if ( 0xFD <= (uint16_t) exp ) {
+        if ( exp < 0 ) {
+            isTiny =
+                   ( softfloat_detectTininess
+                         == softfloat_tininess_beforeRounding )
+                || ( exp < -1 )
+                || ( sig + roundIncrement < 0x80000000 );
+            sig = softfloat_shift32RightJam( sig, - exp );
+            exp = 0;
+            roundBits = sig & 0x7F;
+            if ( isTiny && roundBits ) {
+                softfloat_raiseFlags( softfloat_flag_underflow );
+            }
+        } else if (
+            ( 0xFD < exp ) || ( 0x80000000 <= sig + roundIncrement )
+        ) {
+            softfloat_raiseFlags(
+                softfloat_flag_overflow | softfloat_flag_inexact );
+            uiZ = packToF32UI( sign, 0xFF, 0 ) - ! roundIncrement;
+            goto uiZ;
+        }
+    }
+    if ( roundBits ) softfloat_exceptionFlags |= softfloat_flag_inexact;
+    sig = ( sig + roundIncrement )>>7;
+    sig &= ~ ( ! ( roundBits ^ 0x40 ) & roundNearestEven );
+    uiZ = packToF32UI( sign, sig ? exp : 0, sig );
+ uiZ:
+    uZ.ui = uiZ;
+    return uZ.f;
+
+}
+