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config: introduce use_exact_fp option #1129

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config: introduce use_exact_fp option #1129

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3 changes: 2 additions & 1 deletion ir/type.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
#include "ir/state.h"
#include "smt/solver.h"
#include "util/compiler.h"
#include "util/config.h"
#include <array>
#include <cassert>
#include <numeric>
Expand Down Expand Up @@ -450,7 +451,7 @@ expr FloatType::fromFloat(State &s, const expr &fp, const Type &from_type0,
expr isnan = fp.isNaN();
expr val = fp.float2BV();

if (isnan.isFalse())
if (config::use_exact_fp || isnan.isFalse())
return val;

unsigned fraction_bits = fractionBits();
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1 change: 1 addition & 0 deletions util/config.cpp
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Expand Up @@ -15,6 +15,7 @@ bool skip_smt = false;
string smt_benchmark_dir;
bool disable_poison_input = false;
bool disable_undef_input = false;
bool use_exact_fp = false;
bool tgt_is_asm = false;
bool fail_if_src_is_ub = false;
bool disallow_ub_exploitation = false;
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2 changes: 2 additions & 0 deletions util/config.h
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Expand Up @@ -19,6 +19,8 @@ extern bool disable_poison_input;

extern bool disable_undef_input;

extern bool use_exact_fp;

extern bool tgt_is_asm;

extern bool fail_if_src_is_ub;
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