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Add IEEE 754 TiesToAway rounding mode #8515

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Add IEEE 754 TiesToAway rounding mode #8515

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14 changes: 10 additions & 4 deletions src/util/ieee_float.h
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Original file line number Diff line number Diff line change
Expand Up @@ -117,13 +117,19 @@ class ieee_floatt
public:
// ROUND_TO_EVEN is also known as "round to nearest, ties to even", and
// is the IEEE default.
// ROUND_TO_AWAY is also known as "round to infinity".
// The numbering below is what x86 uses in the control word and
// what is recommended in C11 5.2.4.2.2
// what is recommended in C11 5.2.4.2.2.
// The numbering of ROUND_TO_AWAY is not specified in C11 5.2.4.2.2.
enum rounding_modet
{
ROUND_TO_EVEN=0, ROUND_TO_MINUS_INF=1,
ROUND_TO_PLUS_INF=2, ROUND_TO_ZERO=3,
UNKNOWN, NONDETERMINISTIC
ROUND_TO_EVEN = 0,
ROUND_TO_MINUS_INF = 1,
ROUND_TO_PLUS_INF = 2,
ROUND_TO_ZERO = 3,
ROUND_TO_AWAY = 4,
UNKNOWN,
NONDETERMINISTIC
};

// A helper to turn a rounding mode into a constant bitvector expression
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