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softfloat: float*_to_int32_round_to_zero: don't assume int32 is 32 bits

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Code in the float64_to_int32_round_to_zero() function was assuming
that int32 would not be wider than 32 bits; this meant it might
not correctly detect the overflow case. We take the simple approach
of using int32_t. Also fix equivalent issues in the functions
for other float sizes.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Peter Maydell 2012-04-05 19:12:34 +01:00 committed by Blue Swirl
parent a52d28afb4
commit b3a6a2e041
1 changed files with 4 additions and 4 deletions
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8
fpu/softfloat.c
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@ -1378,7 +1378,7 @@ int32 float32_to_int32_round_to_zero( float32 a STATUS_PARAM )
flag aSign;
int16 aExp, shiftCount;
uint32_t aSig;
int32 z;
int32_t z;
a = float32_squash_input_denormal(a STATUS_VAR);
aSig = extractFloat32Frac( a );
@ -2762,7 +2762,7 @@ int32 float64_to_int32_round_to_zero( float64 a STATUS_PARAM )
flag aSign;
int16 aExp, shiftCount;
uint64_t aSig, savedASig;
int32 z;
int32_t z;
a = float64_squash_input_denormal(a STATUS_VAR);
aSig = extractFloat64Frac( a );
@ -4248,7 +4248,7 @@ int32 floatx80_to_int32_round_to_zero( floatx80 a STATUS_PARAM )
flag aSign;
int32 aExp, shiftCount;
uint64_t aSig, savedASig;
int32 z;
int32_t z;
aSig = extractFloatx80Frac( a );
aExp = extractFloatx80Exp( a );
@ -5277,7 +5277,7 @@ int32 float128_to_int32_round_to_zero( float128 a STATUS_PARAM )
flag aSign;
int32 aExp, shiftCount;
uint64_t aSig0, aSig1, savedASig;
int32 z;
int32_t z;
aSig1 = extractFloat128Frac1( a );
aSig0 = extractFloat128Frac0( a );