softfloat: Fix mixups of int and int16

normalizeFloat{32,64}Subnormal() expect the exponent as int16, not int.
This went unnoticed since int16 and uint16 were both typedef'ed to int.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Bernhard Walle <bernhard@bwalle.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 9e1b5f9..a1c658e 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -2131,7 +2131,7 @@
 float32 float32_muladd(float32 a, float32 b, float32 c, int flags STATUS_PARAM)
 {
     flag aSign, bSign, cSign, zSign;
-    int aExp, bExp, cExp, pExp, zExp, expDiff;
+    int16 aExp, bExp, cExp, pExp, zExp, expDiff;
     uint32_t aSig, bSig, cSig;
     flag pInf, pZero, pSign;
     uint64_t pSig64, cSig64, zSig64;
@@ -3685,7 +3685,7 @@
 float64 float64_muladd(float64 a, float64 b, float64 c, int flags STATUS_PARAM)
 {
     flag aSign, bSign, cSign, zSign;
-    int aExp, bExp, cExp, pExp, zExp, expDiff;
+    int16 aExp, bExp, cExp, pExp, zExp, expDiff;
     uint64_t aSig, bSig, cSig;
     flag pInf, pZero, pSign;
     uint64_t pSig0, pSig1, cSig0, cSig1, zSig0, zSig1;