softfloat: Use float_raise in more places

We have been somewhat inconsistent about when to use
float_raise and when to or in the bit by hand.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 44 insertions, 43 deletions

diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index cd77774..93fe785 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -132,7 +132,7 @@ this code that are retained.
         if (unlikely(soft_t ## _is_denormal(*a))) {                     \
             *a = soft_t ## _set_sign(soft_t ## _zero,                   \
                                      soft_t ## _is_neg(*a));            \
-            s->float_exception_flags |= float_flag_input_denormal;      \
+            float_raise(float_flag_input_denormal, s);                  \
         }                                                               \
     }
 
@@ -360,7 +360,7 @@ float32_gen2(float32 xa, float32 xb, float_status *s,
 
     ur.h = hard(ua.h, ub.h);
     if (unlikely(f32_is_inf(ur))) {
-        s->float_exception_flags |= float_flag_overflow;
+        float_raise(float_flag_overflow, s);
     } else if (unlikely(fabsf(ur.h) <= FLT_MIN) && post(ua, ub)) {
         goto soft;
     }
@@ -391,7 +391,7 @@ float64_gen2(float64 xa, float64 xb, float_status *s,
 
     ur.h = hard(ua.h, ub.h);
     if (unlikely(f64_is_inf(ur))) {
-        s->float_exception_flags |= float_flag_overflow;
+        float_raise(float_flag_overflow, s);
     } else if (unlikely(fabs(ur.h) <= DBL_MIN) && post(ua, ub)) {
         goto soft;
     }
@@ -880,7 +880,7 @@ static FloatParts return_nan(FloatParts a, float_status *s)
 {
     switch (a.cls) {
     case float_class_snan:
-        s->float_exception_flags |= float_flag_invalid;
+        float_raise(float_flag_invalid, s);
         a = parts_silence_nan(a, s);
         /* fall through */
     case float_class_qnan:
@@ -898,7 +898,7 @@ static FloatParts return_nan(FloatParts a, float_status *s)
 static FloatParts pick_nan(FloatParts a, FloatParts b, float_status *s)
 {
     if (is_snan(a.cls) || is_snan(b.cls)) {
-        s->float_exception_flags |= float_flag_invalid;
+        float_raise(float_flag_invalid, s);
     }
 
     if (s->default_nan_mode) {
@@ -922,7 +922,7 @@ static FloatParts pick_nan_muladd(FloatParts a, FloatParts b, FloatParts c,
     int which;
 
     if (is_snan(a.cls) || is_snan(b.cls) || is_snan(c.cls)) {
-        s->float_exception_flags |= float_flag_invalid;
+        float_raise(float_flag_invalid, s);
     }
 
     which = pickNaNMulAdd(a.cls, b.cls, c.cls, inf_zero, s);
@@ -1241,7 +1241,7 @@ static FloatParts mul_floats(FloatParts a, FloatParts b, float_status *s)
     /* Inf * Zero == NaN */
     if ((a.cls == float_class_inf && b.cls == float_class_zero) ||
         (a.cls == float_class_zero && b.cls == float_class_inf)) {
-        s->float_exception_flags |= float_flag_invalid;
+        float_raise(float_flag_invalid, s);
         return parts_default_nan(s);
     }
     /* Multiply by 0 or Inf */
@@ -1356,6 +1356,7 @@ static FloatParts muladd_floats(FloatParts a, FloatParts b, FloatParts c,
     }
 
     if (inf_zero) {
+        float_raise(float_flag_invalid, s);
         s->float_exception_flags |= float_flag_invalid;
         return parts_default_nan(s);
     }
@@ -1380,7 +1381,7 @@ static FloatParts muladd_floats(FloatParts a, FloatParts b, FloatParts c,
 
     if (c.cls == float_class_inf) {
         if (p_class == float_class_inf && p_sign != c.sign) {
-            s->float_exception_flags |= float_flag_invalid;
+            float_raise(float_flag_invalid, s);
             return parts_default_nan(s);
         } else {
             a.cls = float_class_inf;
@@ -1598,7 +1599,7 @@ float32_muladd(float32 xa, float32 xb, float32 xc, int flags, float_status *s)
         ur.h = fmaf(ua.h, ub.h, uc.h);
 
         if (unlikely(f32_is_inf(ur))) {
-            s->float_exception_flags |= float_flag_overflow;
+            float_raise(float_flag_overflow, s);
         } else if (unlikely(fabsf(ur.h) <= FLT_MIN)) {
             ua = ua_orig;
             uc = uc_orig;
@@ -1669,7 +1670,7 @@ float64_muladd(float64 xa, float64 xb, float64 xc, int flags, float_status *s)
         ur.h = fma(ua.h, ub.h, uc.h);
 
         if (unlikely(f64_is_inf(ur))) {
-            s->float_exception_flags |= float_flag_overflow;
+            float_raise(float_flag_overflow, s);
         } else if (unlikely(fabs(ur.h) <= FLT_MIN)) {
             ua = ua_orig;
             uc = uc_orig;
@@ -1749,7 +1750,7 @@ static FloatParts div_floats(FloatParts a, FloatParts b, float_status *s)
     if (a.cls == b.cls
         &&
         (a.cls == float_class_inf || a.cls == float_class_zero)) {
-        s->float_exception_flags |= float_flag_invalid;
+        float_raise(float_flag_invalid, s);
         return parts_default_nan(s);
     }
     /* Inf / x or 0 / x */
@@ -1759,7 +1760,7 @@ static FloatParts div_floats(FloatParts a, FloatParts b, float_status *s)
     }
     /* Div 0 => Inf */
     if (b.cls == float_class_zero) {
-        s->float_exception_flags |= float_flag_divbyzero;
+        float_raise(float_flag_divbyzero, s);
         a.cls = float_class_inf;
         a.sign = sign;
         return a;
@@ -1895,7 +1896,7 @@ static FloatParts float_to_float(FloatParts a, const FloatFmt *dstf,
             /* There is no NaN in the destination format.  Raise Invalid
              * and return a zero with the sign of the input NaN.
              */
-            s->float_exception_flags |= float_flag_invalid;
+            float_raise(float_flag_invalid, s);
             a.cls = float_class_zero;
             a.frac = 0;
             a.exp = 0;
@@ -1905,7 +1906,7 @@ static FloatParts float_to_float(FloatParts a, const FloatFmt *dstf,
             /* There is no Inf in the destination format.  Raise Invalid
              * and return the maximum normal with the correct sign.
              */
-            s->float_exception_flags |= float_flag_invalid;
+            float_raise(float_flag_invalid, s);
             a.cls = float_class_normal;
             a.exp = dstf->exp_max;
             a.frac = ((1ull << dstf->frac_size) - 1) << dstf->frac_shift;
@@ -1916,7 +1917,7 @@ static FloatParts float_to_float(FloatParts a, const FloatFmt *dstf,
         }
     } else if (is_nan(a.cls)) {
         if (is_snan(a.cls)) {
-            s->float_exception_flags |= float_flag_invalid;
+            float_raise(float_flag_invalid, s);
             a = parts_silence_nan(a, s);
         }
         if (s->default_nan_mode) {
@@ -2048,7 +2049,7 @@ static FloatParts round_to_int(FloatParts a, FloatRoundMode rmode,
         if (a.exp < 0) {
             bool one;
             /* all fractional */
-            s->float_exception_flags |= float_flag_inexact;
+            float_raise(float_flag_inexact, s);
             switch (rmode) {
             case float_round_nearest_even:
                 one = a.exp == -1 && a.frac > DECOMPOSED_IMPLICIT_BIT;
@@ -2109,7 +2110,7 @@ static FloatParts round_to_int(FloatParts a, FloatRoundMode rmode,
             }
 
             if (a.frac & rnd_mask) {
-                s->float_exception_flags |= float_flag_inexact;
+                float_raise(float_flag_inexact, s);
                 if (uadd64_overflow(a.frac, inc, &a.frac)) {
                     a.frac >>= 1;
                     a.frac |= DECOMPOSED_IMPLICIT_BIT;
@@ -3188,7 +3189,7 @@ static FloatRelation compare_floats(FloatParts a, FloatParts b, bool is_quiet,
         if (!is_quiet ||
             a.cls == float_class_snan ||
             b.cls == float_class_snan) {
-            s->float_exception_flags |= float_flag_invalid;
+            float_raise(float_flag_invalid, s);
         }
         return float_relation_unordered;
     }
@@ -3429,7 +3430,7 @@ static FloatParts sqrt_float(FloatParts a, float_status *s, const FloatFmt *p)
         return a;  /* sqrt(+-0) = +-0 */
     }
     if (a.sign) {
-        s->float_exception_flags |= float_flag_invalid;
+        float_raise(float_flag_invalid, s);
         return parts_default_nan(s);
     }
     if (a.cls == float_class_inf) {
@@ -3760,7 +3761,7 @@ static int32_t roundAndPackInt32(bool zSign, uint64_t absZ,
         return zSign ? INT32_MIN : INT32_MAX;
     }
     if (roundBits) {
-        status->float_exception_flags |= float_flag_inexact;
+        float_raise(float_flag_inexact, status);
     }
     return z;
 
@@ -3822,7 +3823,7 @@ static int64_t roundAndPackInt64(bool zSign, uint64_t absZ0, uint64_t absZ1,
         return zSign ? INT64_MIN : INT64_MAX;
     }
     if (absZ1) {
-        status->float_exception_flags |= float_flag_inexact;
+        float_raise(float_flag_inexact, status);
     }
     return z;
 
@@ -3883,7 +3884,7 @@ static int64_t roundAndPackUint64(bool zSign, uint64_t absZ0,
     }
 
     if (absZ1) {
-        status->float_exception_flags |= float_flag_inexact;
+        float_raise(float_flag_inexact, status);
     }
     return absZ0;
 }
@@ -3994,7 +3995,7 @@ static float32 roundAndPackFloat32(bool zSign, int zExp, uint32_t zSig,
         }
     }
     if (roundBits) {
-        status->float_exception_flags |= float_flag_inexact;
+        float_raise(float_flag_inexact, status);
     }
     zSig = ( zSig + roundIncrement )>>7;
     if (!(roundBits ^ 0x40) && roundNearestEven) {
@@ -4150,7 +4151,7 @@ static float64 roundAndPackFloat64(bool zSign, int zExp, uint64_t zSig,
         }
     }
     if (roundBits) {
-        status->float_exception_flags |= float_flag_inexact;
+        float_raise(float_flag_inexact, status);
     }
     zSig = ( zSig + roundIncrement )>>10;
     if (!(roundBits ^ 0x200) && roundNearestEven) {
@@ -4284,7 +4285,7 @@ floatx80 roundAndPackFloatx80(int8_t roundingPrecision, bool zSign,
                 float_raise(float_flag_underflow, status);
             }
             if (roundBits) {
-                status->float_exception_flags |= float_flag_inexact;
+                float_raise(float_flag_inexact, status);
             }
             zSig0 += roundIncrement;
             if ( (int64_t) zSig0 < 0 ) zExp = 1;
@@ -4297,7 +4298,7 @@ floatx80 roundAndPackFloatx80(int8_t roundingPrecision, bool zSign,
         }
     }
     if (roundBits) {
-        status->float_exception_flags |= float_flag_inexact;
+        float_raise(float_flag_inexact, status);
     }
     zSig0 += roundIncrement;
     if ( zSig0 < roundIncrement ) {
@@ -4360,7 +4361,7 @@ floatx80 roundAndPackFloatx80(int8_t roundingPrecision, bool zSign,
                 float_raise(float_flag_underflow, status);
             }
             if (zSig1) {
-                status->float_exception_flags |= float_flag_inexact;
+                float_raise(float_flag_inexact, status);
             }
             switch (roundingMode) {
             case float_round_nearest_even:
@@ -4390,7 +4391,7 @@ floatx80 roundAndPackFloatx80(int8_t roundingPrecision, bool zSign,
         }
     }
     if (zSig1) {
-        status->float_exception_flags |= float_flag_inexact;
+        float_raise(float_flag_inexact, status);
     }
     if ( increment ) {
         ++zSig0;
@@ -4667,7 +4668,7 @@ static float128 roundAndPackFloat128(bool zSign, int32_t zExp,
         }
     }
     if (zSig2) {
-        status->float_exception_flags |= float_flag_inexact;
+        float_raise(float_flag_inexact, status);
     }
     if ( increment ) {
         add128( zSig0, zSig1, 0, 1, &zSig0, &zSig1 );
@@ -5405,7 +5406,7 @@ int32_t floatx80_to_int32_round_to_zero(floatx80 a, float_status *status)
     }
     else if ( aExp < 0x3FFF ) {
         if (aExp || aSig) {
-            status->float_exception_flags |= float_flag_inexact;
+            float_raise(float_flag_inexact, status);
         }
         return 0;
     }
@@ -5420,7 +5421,7 @@ int32_t floatx80_to_int32_round_to_zero(floatx80 a, float_status *status)
         return aSign ? (int32_t) 0x80000000 : 0x7FFFFFFF;
     }
     if ( ( aSig<<shiftCount ) != savedASig ) {
-        status->float_exception_flags |= float_flag_inexact;
+        float_raise(float_flag_inexact, status);
     }
     return z;
 
@@ -5504,13 +5505,13 @@ int64_t floatx80_to_int64_round_to_zero(floatx80 a, float_status *status)
     }
     else if ( aExp < 0x3FFF ) {
         if (aExp | aSig) {
-            status->float_exception_flags |= float_flag_inexact;
+            float_raise(float_flag_inexact, status);
         }
         return 0;
     }
     z = aSig>>( - shiftCount );
     if ( (uint64_t) ( aSig<<( shiftCount & 63 ) ) ) {
-        status->float_exception_flags |= float_flag_inexact;
+        float_raise(float_flag_inexact, status);
     }
     if ( aSign ) z = - z;
     return z;
@@ -5661,7 +5662,7 @@ floatx80 floatx80_round_to_int(floatx80 a, float_status *status)
              && ( (uint64_t) ( extractFloatx80Frac( a ) ) == 0 ) ) {
             return a;
         }
-        status->float_exception_flags |= float_flag_inexact;
+        float_raise(float_flag_inexact, status);
         aSign = extractFloatx80Sign( a );
         switch (status->float_rounding_mode) {
          case float_round_nearest_even:
@@ -5728,7 +5729,7 @@ floatx80 floatx80_round_to_int(floatx80 a, float_status *status)
         z.low = UINT64_C(0x8000000000000000);
     }
     if (z.low != a.low) {
-        status->float_exception_flags |= float_flag_inexact;
+        float_raise(float_flag_inexact, status);
     }
     return z;
 
@@ -6364,7 +6365,7 @@ int32_t float128_to_int32_round_to_zero(float128 a, float_status *status)
     }
     else if ( aExp < 0x3FFF ) {
         if (aExp || aSig0) {
-            status->float_exception_flags |= float_flag_inexact;
+            float_raise(float_flag_inexact, status);
         }
         return 0;
     }
@@ -6380,7 +6381,7 @@ int32_t float128_to_int32_round_to_zero(float128 a, float_status *status)
         return aSign ? INT32_MIN : INT32_MAX;
     }
     if ( ( aSig0<<shiftCount ) != savedASig ) {
-        status->float_exception_flags |= float_flag_inexact;
+        float_raise(float_flag_inexact, status);
     }
     return z;
 
@@ -6458,7 +6459,7 @@ int64_t float128_to_int64_round_to_zero(float128 a, float_status *status)
             if (    ( a.high == UINT64_C(0xC03E000000000000) )
                  && ( aSig1 < UINT64_C(0x0002000000000000) ) ) {
                 if (aSig1) {
-                    status->float_exception_flags |= float_flag_inexact;
+                    float_raise(float_flag_inexact, status);
                 }
             }
             else {
@@ -6471,20 +6472,20 @@ int64_t float128_to_int64_round_to_zero(float128 a, float_status *status)
         }
         z = ( aSig0<<shiftCount ) | ( aSig1>>( ( - shiftCount ) & 63 ) );
         if ( (uint64_t) ( aSig1<<shiftCount ) ) {
-            status->float_exception_flags |= float_flag_inexact;
+            float_raise(float_flag_inexact, status);
         }
     }
     else {
         if ( aExp < 0x3FFF ) {
             if ( aExp | aSig0 | aSig1 ) {
-                status->float_exception_flags |= float_flag_inexact;
+                float_raise(float_flag_inexact, status);
             }
             return 0;
         }
         z = aSig0>>( - shiftCount );
         if (    aSig1
              || ( shiftCount && (uint64_t) ( aSig0<<( shiftCount & 63 ) ) ) ) {
-            status->float_exception_flags |= float_flag_inexact;
+            float_raise(float_flag_inexact, status);
         }
     }
     if ( aSign ) z = - z;
@@ -6793,7 +6794,7 @@ float128 float128_round_to_int(float128 a, float_status *status)
     else {
         if ( aExp < 0x3FFF ) {
             if ( ( ( (uint64_t) ( a.high<<1 ) ) | a.low ) == 0 ) return a;
-            status->float_exception_flags |= float_flag_inexact;
+            float_raise(float_flag_inexact, status);
             aSign = extractFloat128Sign( a );
             switch (status->float_rounding_mode) {
             case float_round_nearest_even:
@@ -6867,7 +6868,7 @@ float128 float128_round_to_int(float128 a, float_status *status)
         z.high &= ~ roundBitsMask;
     }
     if ( ( z.low != a.low ) || ( z.high != a.high ) ) {
-        status->float_exception_flags |= float_flag_inexact;
+        float_raise(float_flag_inexact, status);
     }
     return z;