Patchwork [v2,4/4] softfloat: Replace int16 type with int_fast16_t

login
register
mail settings
Submitter Andreas Färber
Date April 25, 2012, 10:15 p.m.
Message ID <1335392156-13616-5-git-send-email-andreas.faerber@web.de>
Download mbox | patch
Permalink /patch/155122/
State New
Headers show

Comments

Andreas Färber - April 25, 2012, 10:15 p.m.
From: Andreas Färber <afaerber@suse.de>

Based on the following Coccinelle patch:

@@
typedef int16, int_fast16_t;
@@
-int16
+int_fast16_t

Avoids a workaround for AIX.

Add typedef for pre-10 Solaris.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Cc: malc <av1474@comtv.ru>
Cc: Ben Taylor <bentaylor.solx86@gmail.com>
---
 fpu/softfloat-macros.h |   18 ++++----
 fpu/softfloat.c        |  114 ++++++++++++++++++++++++------------------------
 fpu/softfloat.h        |    7 +--
 osdep.h                |    1 +
 4 files changed, 69 insertions(+), 71 deletions(-)
Peter Maydell - April 26, 2012, 4:14 p.m.
On 25 April 2012 23:15, Andreas Färber <andreas.faerber@web.de> wrote:
> From: Andreas Färber <afaerber@suse.de>
>
> Based on the following Coccinelle patch:
>
> @@
> typedef int16, int_fast16_t;
> @@
> -int16
> +int_fast16_t
>
> Avoids a workaround for AIX.
>
> Add typedef for pre-10 Solaris.
>
> Signed-off-by: Andreas Färber <afaerber@suse.de>
> Cc: malc <av1474@comtv.ru>
> Cc: Ben Taylor <bentaylor.solx86@gmail.com>

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

This is a pretty safe change, because the only external-to-softfloat
APIs this changes are a couple used only by the ARM target (which
I've tested and am happy are OK). The ARM vfp/neon tests I've run
should have exercised the rest of the softfloat code reasonably
well so the internal-to-softfloat changes should be OK too. In
any case the type wasn't exactly-16-bits before so we already
know the code is OK with the type being potentially wider than
16 bits.

-- PMM

Patch

diff --git a/fpu/softfloat-macros.h b/fpu/softfloat-macros.h
index e82ce23..b5164af 100644
--- a/fpu/softfloat-macros.h
+++ b/fpu/softfloat-macros.h
@@ -55,7 +55,7 @@  these four paragraphs for those parts of this code that are retained.
 | The result is stored in the location pointed to by `zPtr'.
 *----------------------------------------------------------------------------*/
 
-INLINE void shift32RightJamming( uint32_t a, int16 count, uint32_t *zPtr )
+INLINE void shift32RightJamming(uint32_t a, int_fast16_t count, uint32_t *zPtr)
 {
     uint32_t z;
 
@@ -81,7 +81,7 @@  INLINE void shift32RightJamming( uint32_t a, int16 count, uint32_t *zPtr )
 | The result is stored in the location pointed to by `zPtr'.
 *----------------------------------------------------------------------------*/
 
-INLINE void shift64RightJamming( uint64_t a, int16 count, uint64_t *zPtr )
+INLINE void shift64RightJamming(uint64_t a, int_fast16_t count, uint64_t *zPtr)
 {
     uint64_t z;
 
@@ -117,7 +117,7 @@  INLINE void shift64RightJamming( uint64_t a, int16 count, uint64_t *zPtr )
 
 INLINE void
  shift64ExtraRightJamming(
-     uint64_t a0, uint64_t a1, int16 count, uint64_t *z0Ptr, uint64_t *z1Ptr )
+     uint64_t a0, uint64_t a1, int_fast16_t count, uint64_t *z0Ptr, uint64_t *z1Ptr)
 {
     uint64_t z0, z1;
     int8 negCount = ( - count ) & 63;
@@ -154,7 +154,7 @@  INLINE void
 
 INLINE void
  shift128Right(
-     uint64_t a0, uint64_t a1, int16 count, uint64_t *z0Ptr, uint64_t *z1Ptr )
+     uint64_t a0, uint64_t a1, int_fast16_t count, uint64_t *z0Ptr, uint64_t *z1Ptr)
 {
     uint64_t z0, z1;
     int8 negCount = ( - count ) & 63;
@@ -189,7 +189,7 @@  INLINE void
 
 INLINE void
  shift128RightJamming(
-     uint64_t a0, uint64_t a1, int16 count, uint64_t *z0Ptr, uint64_t *z1Ptr )
+     uint64_t a0, uint64_t a1, int_fast16_t count, uint64_t *z0Ptr, uint64_t *z1Ptr)
 {
     uint64_t z0, z1;
     int8 negCount = ( - count ) & 63;
@@ -243,7 +243,7 @@  INLINE void
      uint64_t a0,
      uint64_t a1,
      uint64_t a2,
-     int16 count,
+     int_fast16_t count,
      uint64_t *z0Ptr,
      uint64_t *z1Ptr,
      uint64_t *z2Ptr
@@ -298,7 +298,7 @@  INLINE void
 
 INLINE void
  shortShift128Left(
-     uint64_t a0, uint64_t a1, int16 count, uint64_t *z0Ptr, uint64_t *z1Ptr )
+     uint64_t a0, uint64_t a1, int_fast16_t count, uint64_t *z0Ptr, uint64_t *z1Ptr)
 {
 
     *z1Ptr = a1<<count;
@@ -320,7 +320,7 @@  INLINE void
      uint64_t a0,
      uint64_t a1,
      uint64_t a2,
-     int16 count,
+     int_fast16_t count,
      uint64_t *z0Ptr,
      uint64_t *z1Ptr,
      uint64_t *z2Ptr
@@ -591,7 +591,7 @@  static uint64_t estimateDiv128To64( uint64_t a0, uint64_t a1, uint64_t b )
 | value.
 *----------------------------------------------------------------------------*/
 
-static uint32_t estimateSqrt32( int16 aExp, uint32_t a )
+static uint32_t estimateSqrt32(int_fast16_t aExp, uint32_t a)
 {
     static const uint16_t sqrtOddAdjustments[] = {
         0x0004, 0x0022, 0x005D, 0x00B1, 0x011D, 0x019F, 0x0236, 0x02E0,
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 50fce01..b29256a 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -87,7 +87,7 @@  INLINE uint32_t extractFloat16Frac(float16 a)
 | Returns the exponent bits of the half-precision floating-point value `a'.
 *----------------------------------------------------------------------------*/
 
-INLINE int16 extractFloat16Exp(float16 a)
+INLINE int_fast16_t extractFloat16Exp(float16 a)
 {
     return (float16_val(a) >> 10) & 0x1f;
 }
@@ -218,7 +218,7 @@  INLINE uint32_t extractFloat32Frac( float32 a )
 | Returns the exponent bits of the single-precision floating-point value `a'.
 *----------------------------------------------------------------------------*/
 
-INLINE int16 extractFloat32Exp( float32 a )
+INLINE int_fast16_t extractFloat32Exp(float32 a)
 {
 
     return ( float32_val(a)>>23 ) & 0xFF;
@@ -259,7 +259,7 @@  static float32 float32_squash_input_denormal(float32 a STATUS_PARAM)
 *----------------------------------------------------------------------------*/
 
 static void
- normalizeFloat32Subnormal( uint32_t aSig, int16 *zExpPtr, uint32_t *zSigPtr )
+ normalizeFloat32Subnormal(uint32_t aSig, int_fast16_t *zExpPtr, uint32_t *zSigPtr)
 {
     int8 shiftCount;
 
@@ -280,7 +280,7 @@  static void
 | significand.
 *----------------------------------------------------------------------------*/
 
-INLINE float32 packFloat32( flag zSign, int16 zExp, uint32_t zSig )
+INLINE float32 packFloat32(flag zSign, int_fast16_t zExp, uint32_t zSig)
 {
 
     return make_float32(
@@ -310,7 +310,7 @@  INLINE float32 packFloat32( flag zSign, int16 zExp, uint32_t zSig )
 | Binary Floating-Point Arithmetic.
 *----------------------------------------------------------------------------*/
 
-static float32 roundAndPackFloat32( flag zSign, int16 zExp, uint32_t zSig STATUS_PARAM)
+static float32 roundAndPackFloat32(flag zSign, int_fast16_t zExp, uint32_t zSig STATUS_PARAM)
 {
     int8 roundingMode;
     flag roundNearestEven;
@@ -376,7 +376,7 @@  static float32 roundAndPackFloat32( flag zSign, int16 zExp, uint32_t zSig STATUS
 *----------------------------------------------------------------------------*/
 
 static float32
- normalizeRoundAndPackFloat32( flag zSign, int16 zExp, uint32_t zSig STATUS_PARAM)
+ normalizeRoundAndPackFloat32(flag zSign, int_fast16_t zExp, uint32_t zSig STATUS_PARAM)
 {
     int8 shiftCount;
 
@@ -400,7 +400,7 @@  INLINE uint64_t extractFloat64Frac( float64 a )
 | Returns the exponent bits of the double-precision floating-point value `a'.
 *----------------------------------------------------------------------------*/
 
-INLINE int16 extractFloat64Exp( float64 a )
+INLINE int_fast16_t extractFloat64Exp(float64 a)
 {
 
     return ( float64_val(a)>>52 ) & 0x7FF;
@@ -441,7 +441,7 @@  static float64 float64_squash_input_denormal(float64 a STATUS_PARAM)
 *----------------------------------------------------------------------------*/
 
 static void
- normalizeFloat64Subnormal( uint64_t aSig, int16 *zExpPtr, uint64_t *zSigPtr )
+ normalizeFloat64Subnormal(uint64_t aSig, int_fast16_t *zExpPtr, uint64_t *zSigPtr)
 {
     int8 shiftCount;
 
@@ -462,7 +462,7 @@  static void
 | significand.
 *----------------------------------------------------------------------------*/
 
-INLINE float64 packFloat64( flag zSign, int16 zExp, uint64_t zSig )
+INLINE float64 packFloat64(flag zSign, int_fast16_t zExp, uint64_t zSig)
 {
 
     return make_float64(
@@ -492,11 +492,11 @@  INLINE float64 packFloat64( flag zSign, int16 zExp, uint64_t zSig )
 | Binary Floating-Point Arithmetic.
 *----------------------------------------------------------------------------*/
 
-static float64 roundAndPackFloat64( flag zSign, int16 zExp, uint64_t zSig STATUS_PARAM)
+static float64 roundAndPackFloat64(flag zSign, int_fast16_t zExp, uint64_t zSig STATUS_PARAM)
 {
     int8 roundingMode;
     flag roundNearestEven;
-    int16 roundIncrement, roundBits;
+    int_fast16_t roundIncrement, roundBits;
     flag isTiny;
 
     roundingMode = STATUS(float_rounding_mode);
@@ -558,7 +558,7 @@  static float64 roundAndPackFloat64( flag zSign, int16 zExp, uint64_t zSig STATUS
 *----------------------------------------------------------------------------*/
 
 static float64
- normalizeRoundAndPackFloat64( flag zSign, int16 zExp, uint64_t zSig STATUS_PARAM)
+ normalizeRoundAndPackFloat64(flag zSign, int_fast16_t zExp, uint64_t zSig STATUS_PARAM)
 {
     int8 shiftCount;
 
@@ -1345,7 +1345,7 @@  float128 int64_to_float128( int64 a STATUS_PARAM )
 int32 float32_to_int32( float32 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp, shiftCount;
+    int_fast16_t aExp, shiftCount;
     uint32_t aSig;
     uint64_t aSig64;
 
@@ -1376,7 +1376,7 @@  int32 float32_to_int32( float32 a STATUS_PARAM )
 int32 float32_to_int32_round_to_zero( float32 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp, shiftCount;
+    int_fast16_t aExp, shiftCount;
     uint32_t aSig;
     int32_t z;
     a = float32_squash_input_denormal(a STATUS_VAR);
@@ -1416,10 +1416,10 @@  int32 float32_to_int32_round_to_zero( float32 a STATUS_PARAM )
 | returned.
 *----------------------------------------------------------------------------*/
 
-int16 float32_to_int16_round_to_zero( float32 a STATUS_PARAM )
+int_fast16_t float32_to_int16_round_to_zero(float32 a STATUS_PARAM)
 {
     flag aSign;
-    int16 aExp, shiftCount;
+    int_fast16_t aExp, shiftCount;
     uint32_t aSig;
     int32 z;
 
@@ -1468,7 +1468,7 @@  int16 float32_to_int16_round_to_zero( float32 a STATUS_PARAM )
 int64 float32_to_int64( float32 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp, shiftCount;
+    int_fast16_t aExp, shiftCount;
     uint32_t aSig;
     uint64_t aSig64, aSigExtra;
     a = float32_squash_input_denormal(a STATUS_VAR);
@@ -1505,7 +1505,7 @@  int64 float32_to_int64( float32 a STATUS_PARAM )
 int64 float32_to_int64_round_to_zero( float32 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp, shiftCount;
+    int_fast16_t aExp, shiftCount;
     uint32_t aSig;
     uint64_t aSig64;
     int64 z;
@@ -1549,7 +1549,7 @@  int64 float32_to_int64_round_to_zero( float32 a STATUS_PARAM )
 float64 float32_to_float64( float32 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp;
+    int_fast16_t aExp;
     uint32_t aSig;
     a = float32_squash_input_denormal(a STATUS_VAR);
 
@@ -1579,7 +1579,7 @@  float64 float32_to_float64( float32 a STATUS_PARAM )
 floatx80 float32_to_floatx80( float32 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp;
+    int_fast16_t aExp;
     uint32_t aSig;
 
     a = float32_squash_input_denormal(a STATUS_VAR);
@@ -1609,7 +1609,7 @@  floatx80 float32_to_floatx80( float32 a STATUS_PARAM )
 float128 float32_to_float128( float32 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp;
+    int_fast16_t aExp;
     uint32_t aSig;
 
     a = float32_squash_input_denormal(a STATUS_VAR);
@@ -1639,7 +1639,7 @@  float128 float32_to_float128( float32 a STATUS_PARAM )
 float32 float32_round_to_int( float32 a STATUS_PARAM)
 {
     flag aSign;
-    int16 aExp;
+    int_fast16_t aExp;
     uint32_t lastBitMask, roundBitsMask;
     int8 roundingMode;
     uint32_t z;
@@ -1699,9 +1699,9 @@  float32 float32_round_to_int( float32 a STATUS_PARAM)
 
 static float32 addFloat32Sigs( float32 a, float32 b, flag zSign STATUS_PARAM)
 {
-    int16 aExp, bExp, zExp;
+    int_fast16_t aExp, bExp, zExp;
     uint32_t aSig, bSig, zSig;
-    int16 expDiff;
+    int_fast16_t expDiff;
 
     aSig = extractFloat32Frac( a );
     aExp = extractFloat32Exp( a );
@@ -1778,9 +1778,9 @@  static float32 addFloat32Sigs( float32 a, float32 b, flag zSign STATUS_PARAM)
 
 static float32 subFloat32Sigs( float32 a, float32 b, flag zSign STATUS_PARAM)
 {
-    int16 aExp, bExp, zExp;
+    int_fast16_t aExp, bExp, zExp;
     uint32_t aSig, bSig, zSig;
-    int16 expDiff;
+    int_fast16_t expDiff;
 
     aSig = extractFloat32Frac( a );
     aExp = extractFloat32Exp( a );
@@ -1898,7 +1898,7 @@  float32 float32_sub( float32 a, float32 b STATUS_PARAM )
 float32 float32_mul( float32 a, float32 b STATUS_PARAM )
 {
     flag aSign, bSign, zSign;
-    int16 aExp, bExp, zExp;
+    int_fast16_t aExp, bExp, zExp;
     uint32_t aSig, bSig;
     uint64_t zSig64;
     uint32_t zSig;
@@ -1961,7 +1961,7 @@  float32 float32_mul( float32 a, float32 b STATUS_PARAM )
 float32 float32_div( float32 a, float32 b STATUS_PARAM )
 {
     flag aSign, bSign, zSign;
-    int16 aExp, bExp, zExp;
+    int_fast16_t aExp, bExp, zExp;
     uint32_t aSig, bSig, zSig;
     a = float32_squash_input_denormal(a STATUS_VAR);
     b = float32_squash_input_denormal(b STATUS_VAR);
@@ -2025,7 +2025,7 @@  float32 float32_div( float32 a, float32 b STATUS_PARAM )
 float32 float32_rem( float32 a, float32 b STATUS_PARAM )
 {
     flag aSign, zSign;
-    int16 aExp, bExp, expDiff;
+    int_fast16_t aExp, bExp, expDiff;
     uint32_t aSig, bSig;
     uint32_t q;
     uint64_t aSig64, bSig64, q64;
@@ -2131,7 +2131,7 @@  float32 float32_rem( float32 a, float32 b STATUS_PARAM )
 float32 float32_muladd(float32 a, float32 b, float32 c, int flags STATUS_PARAM)
 {
     flag aSign, bSign, cSign, zSign;
-    int16 aExp, bExp, cExp, pExp, zExp, expDiff;
+    int_fast16_t aExp, bExp, cExp, pExp, zExp, expDiff;
     uint32_t aSig, bSig, cSig;
     flag pInf, pZero, pSign;
     uint64_t pSig64, cSig64, zSig64;
@@ -2333,7 +2333,7 @@  float32 float32_muladd(float32 a, float32 b, float32 c, int flags STATUS_PARAM)
 float32 float32_sqrt( float32 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp, zExp;
+    int_fast16_t aExp, zExp;
     uint32_t aSig, zSig;
     uint64_t rem, term;
     a = float32_squash_input_denormal(a STATUS_VAR);
@@ -2419,7 +2419,7 @@  static const float64 float32_exp2_coefficients[15] =
 float32 float32_exp2( float32 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp;
+    int_fast16_t aExp;
     uint32_t aSig;
     float64 r, x, xn;
     int i;
@@ -2467,7 +2467,7 @@  float32 float32_exp2( float32 a STATUS_PARAM )
 float32 float32_log2( float32 a STATUS_PARAM )
 {
     flag aSign, zSign;
-    int16 aExp;
+    int_fast16_t aExp;
     uint32_t aSig, zSig, i;
 
     a = float32_squash_input_denormal(a STATUS_VAR);
@@ -2732,7 +2732,7 @@  int float32_unordered_quiet( float32 a, float32 b STATUS_PARAM )
 int32 float64_to_int32( float64 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp, shiftCount;
+    int_fast16_t aExp, shiftCount;
     uint64_t aSig;
     a = float64_squash_input_denormal(a STATUS_VAR);
 
@@ -2760,7 +2760,7 @@  int32 float64_to_int32( float64 a STATUS_PARAM )
 int32 float64_to_int32_round_to_zero( float64 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp, shiftCount;
+    int_fast16_t aExp, shiftCount;
     uint64_t aSig, savedASig;
     int32_t z;
     a = float64_squash_input_denormal(a STATUS_VAR);
@@ -2804,10 +2804,10 @@  int32 float64_to_int32_round_to_zero( float64 a STATUS_PARAM )
 | returned.
 *----------------------------------------------------------------------------*/
 
-int16 float64_to_int16_round_to_zero( float64 a STATUS_PARAM )
+int_fast16_t float64_to_int16_round_to_zero(float64 a STATUS_PARAM)
 {
     flag aSign;
-    int16 aExp, shiftCount;
+    int_fast16_t aExp, shiftCount;
     uint64_t aSig, savedASig;
     int32 z;
 
@@ -2858,7 +2858,7 @@  int16 float64_to_int16_round_to_zero( float64 a STATUS_PARAM )
 int64 float64_to_int64( float64 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp, shiftCount;
+    int_fast16_t aExp, shiftCount;
     uint64_t aSig, aSigExtra;
     a = float64_squash_input_denormal(a STATUS_VAR);
 
@@ -2901,7 +2901,7 @@  int64 float64_to_int64( float64 a STATUS_PARAM )
 int64 float64_to_int64_round_to_zero( float64 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp, shiftCount;
+    int_fast16_t aExp, shiftCount;
     uint64_t aSig;
     int64 z;
     a = float64_squash_input_denormal(a STATUS_VAR);
@@ -2951,7 +2951,7 @@  int64 float64_to_int64_round_to_zero( float64 a STATUS_PARAM )
 float32 float64_to_float32( float64 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp;
+    int_fast16_t aExp;
     uint64_t aSig;
     uint32_t zSig;
     a = float64_squash_input_denormal(a STATUS_VAR);
@@ -2984,7 +2984,7 @@  float32 float64_to_float32( float64 a STATUS_PARAM )
 | than the desired result exponent whenever `zSig' is a complete, normalized
 | significand.
 *----------------------------------------------------------------------------*/
-static float16 packFloat16(flag zSign, int16 zExp, uint16_t zSig)
+static float16 packFloat16(flag zSign, int_fast16_t zExp, uint16_t zSig)
 {
     return make_float16(
         (((uint32_t)zSign) << 15) + (((uint32_t)zExp) << 10) + zSig);
@@ -2996,7 +2996,7 @@  static float16 packFloat16(flag zSign, int16 zExp, uint16_t zSig)
 float32 float16_to_float32(float16 a, flag ieee STATUS_PARAM)
 {
     flag aSign;
-    int16 aExp;
+    int_fast16_t aExp;
     uint32_t aSig;
 
     aSign = extractFloat16Sign(a);
@@ -3026,7 +3026,7 @@  float32 float16_to_float32(float16 a, flag ieee STATUS_PARAM)
 float16 float32_to_float16(float32 a, flag ieee STATUS_PARAM)
 {
     flag aSign;
-    int16 aExp;
+    int_fast16_t aExp;
     uint32_t aSig;
     uint32_t mask;
     uint32_t increment;
@@ -3127,7 +3127,7 @@  float16 float32_to_float16(float32 a, flag ieee STATUS_PARAM)
 floatx80 float64_to_floatx80( float64 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp;
+    int_fast16_t aExp;
     uint64_t aSig;
 
     a = float64_squash_input_denormal(a STATUS_VAR);
@@ -3158,7 +3158,7 @@  floatx80 float64_to_floatx80( float64 a STATUS_PARAM )
 float128 float64_to_float128( float64 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp;
+    int_fast16_t aExp;
     uint64_t aSig, zSig0, zSig1;
 
     a = float64_squash_input_denormal(a STATUS_VAR);
@@ -3189,7 +3189,7 @@  float128 float64_to_float128( float64 a STATUS_PARAM )
 float64 float64_round_to_int( float64 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp;
+    int_fast16_t aExp;
     uint64_t lastBitMask, roundBitsMask;
     int8 roundingMode;
     uint64_t z;
@@ -3262,9 +3262,9 @@  float64 float64_trunc_to_int( float64 a STATUS_PARAM)
 
 static float64 addFloat64Sigs( float64 a, float64 b, flag zSign STATUS_PARAM )
 {
-    int16 aExp, bExp, zExp;
+    int_fast16_t aExp, bExp, zExp;
     uint64_t aSig, bSig, zSig;
-    int16 expDiff;
+    int_fast16_t expDiff;
 
     aSig = extractFloat64Frac( a );
     aExp = extractFloat64Exp( a );
@@ -3341,9 +3341,9 @@  static float64 addFloat64Sigs( float64 a, float64 b, flag zSign STATUS_PARAM )
 
 static float64 subFloat64Sigs( float64 a, float64 b, flag zSign STATUS_PARAM )
 {
-    int16 aExp, bExp, zExp;
+    int_fast16_t aExp, bExp, zExp;
     uint64_t aSig, bSig, zSig;
-    int16 expDiff;
+    int_fast16_t expDiff;
 
     aSig = extractFloat64Frac( a );
     aExp = extractFloat64Exp( a );
@@ -3461,7 +3461,7 @@  float64 float64_sub( float64 a, float64 b STATUS_PARAM )
 float64 float64_mul( float64 a, float64 b STATUS_PARAM )
 {
     flag aSign, bSign, zSign;
-    int16 aExp, bExp, zExp;
+    int_fast16_t aExp, bExp, zExp;
     uint64_t aSig, bSig, zSig0, zSig1;
 
     a = float64_squash_input_denormal(a STATUS_VAR);
@@ -3522,7 +3522,7 @@  float64 float64_mul( float64 a, float64 b STATUS_PARAM )
 float64 float64_div( float64 a, float64 b STATUS_PARAM )
 {
     flag aSign, bSign, zSign;
-    int16 aExp, bExp, zExp;
+    int_fast16_t aExp, bExp, zExp;
     uint64_t aSig, bSig, zSig;
     uint64_t rem0, rem1;
     uint64_t term0, term1;
@@ -3594,7 +3594,7 @@  float64 float64_div( float64 a, float64 b STATUS_PARAM )
 float64 float64_rem( float64 a, float64 b STATUS_PARAM )
 {
     flag aSign, zSign;
-    int16 aExp, bExp, expDiff;
+    int_fast16_t aExp, bExp, expDiff;
     uint64_t aSig, bSig;
     uint64_t q, alternateASig;
     int64_t sigMean;
@@ -3685,7 +3685,7 @@  float64 float64_rem( float64 a, float64 b STATUS_PARAM )
 float64 float64_muladd(float64 a, float64 b, float64 c, int flags STATUS_PARAM)
 {
     flag aSign, bSign, cSign, zSign;
-    int16 aExp, bExp, cExp, pExp, zExp, expDiff;
+    int_fast16_t aExp, bExp, cExp, pExp, zExp, expDiff;
     uint64_t aSig, bSig, cSig;
     flag pInf, pZero, pSign;
     uint64_t pSig0, pSig1, cSig0, cSig1, zSig0, zSig1;
@@ -3900,7 +3900,7 @@  float64 float64_muladd(float64 a, float64 b, float64 c, int flags STATUS_PARAM)
 float64 float64_sqrt( float64 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp, zExp;
+    int_fast16_t aExp, zExp;
     uint64_t aSig, zSig, doubleZSig;
     uint64_t rem0, rem1, term0, term1;
     a = float64_squash_input_denormal(a STATUS_VAR);
@@ -3951,7 +3951,7 @@  float64 float64_sqrt( float64 a STATUS_PARAM )
 float64 float64_log2( float64 a STATUS_PARAM )
 {
     flag aSign, zSign;
-    int16 aExp;
+    int_fast16_t aExp;
     uint64_t aSig, aSig0, aSig1, zSig, i;
     a = float64_squash_input_denormal(a STATUS_VAR);
 
@@ -4428,7 +4428,7 @@  float64 floatx80_to_float64( floatx80 a STATUS_PARAM )
 float128 floatx80_to_float128( floatx80 a STATUS_PARAM )
 {
     flag aSign;
-    int16 aExp;
+    int_fast16_t aExp;
     uint64_t aSig, zSig0, zSig1;
 
     aSig = extractFloatx80Frac( a );
diff --git a/fpu/softfloat.h b/fpu/softfloat.h
index 75246c4..feec3a1 100644
--- a/fpu/softfloat.h
+++ b/fpu/softfloat.h
@@ -57,9 +57,6 @@  these four paragraphs for those parts of this code that are retained.
 typedef uint8_t flag;
 typedef uint8_t uint8;
 typedef int8_t int8;
-#ifndef _AIX
-typedef int int16;
-#endif
 typedef unsigned int uint32;
 typedef signed int int32;
 typedef uint64_t uint64;
@@ -262,7 +259,7 @@  extern const float16 float16_default_nan;
 /*----------------------------------------------------------------------------
 | Software IEC/IEEE single-precision conversion routines.
 *----------------------------------------------------------------------------*/
-int16 float32_to_int16_round_to_zero( float32 STATUS_PARAM );
+int_fast16_t float32_to_int16_round_to_zero(float32 STATUS_PARAM);
 uint_fast16_t float32_to_uint16_round_to_zero(float32 STATUS_PARAM);
 int32 float32_to_int32( float32 STATUS_PARAM );
 int32 float32_to_int32_round_to_zero( float32 STATUS_PARAM );
@@ -366,7 +363,7 @@  extern const float32 float32_default_nan;
 /*----------------------------------------------------------------------------
 | Software IEC/IEEE double-precision conversion routines.
 *----------------------------------------------------------------------------*/
-int16 float64_to_int16_round_to_zero( float64 STATUS_PARAM );
+int_fast16_t float64_to_int16_round_to_zero(float64 STATUS_PARAM);
 uint_fast16_t float64_to_uint16_round_to_zero(float64 STATUS_PARAM);
 int32 float64_to_int32( float64 STATUS_PARAM );
 int32 float64_to_int32_round_to_zero( float64 STATUS_PARAM );
diff --git a/osdep.h b/osdep.h
index 095407d..9db8766 100644
--- a/osdep.h
+++ b/osdep.h
@@ -14,6 +14,7 @@ 
 /* [u]int_fast*_t not in <sys/int_types.h> */
 typedef unsigned char           uint_fast8_t;
 typedef unsigned int            uint_fast16_t;
+typedef signed int              int_fast16_t;
 #endif
 
 #ifndef glue