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add support for concrete floating_point union #112

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1 change: 1 addition & 0 deletions headers/gensym/defs.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@ using Id = int;
using Addr = unsigned int;
using IntData = int64_t;
using UIntData = unsigned long long int;
using FloatData = long double;
using Fd = int;
using status_t = unsigned short;

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114 changes: 67 additions & 47 deletions headers/gensym/value_ops.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -265,26 +265,51 @@ inline char proj_IntV_char(const PtrVal& v) {
return static_cast<char>(proj_IntV(intV));
}

/* Concrete floating-point values are kept in their native representation;
* `bw` selects which member of the union is the live one.
*/
union FloatV_val {
float f32;
double f64;
long double f80;
FloatV_val(FloatData f, size_t bw) {
switch (bw) {
case 32: f32 = f; break;
case 64: f64 = f; break;
case 80: f80 = f; break;
default: ABORT("Making a float of unsupported bitwidth " << bw);
}
}
};

struct FloatV : Value {
long double f;
FloatV_val f;
size_t bw;
FloatV(long double f, size_t bw=32) : f(f), bw(bw) {
FloatV(FloatData f, size_t bw=32) : f(f, bw), bw(bw) {
hash_combine(hash(), std::string("floatv"));
hash_combine(hash(), f);
hash_combine(hash(), as_ld());
hash_combine(hash(), bw);
}
FloatV(const FloatV& v): FloatV(v.f, v.bw) {}
FloatV(const FloatV& v) : FloatV(v.as_ld(), v.bw) {}
std::string toString() const override {
std::ostringstream ss;
ss << "FloatV(f=" << f << ", bw=" << bw << ")";
ss << "FloatV(f=" << as_ld() << ", bw=" << bw << ")";
return ss.str();
}
virtual bool is_conc() const override { return true; }
virtual size_t get_bw() const override { return bw; }
FloatData as_ld() const {
switch (bw) {
case 32: return f.f32;
case 64: return f.f64;
case 80: return f.f80;
}
ABORT("Reading a float of unsupported bitwidth " << bw);
}

virtual bool compare(const Value* v) const override {
auto that = static_cast<decltype(this)>(v);
if (this->f != that->f) return false;
if (this->as_ld() != that->as_ld()) return false;
return this->bw == that->bw;
}
virtual List<PtrVal> to_bytes() {
Expand All @@ -295,23 +320,19 @@ struct FloatV : Value {
}
};

inline PtrVal make_FloatV(long double f) {
auto ret = make_simple<FloatV>(f);
return hashconsing(ret);
}

inline PtrVal make_FloatV(long double f, size_t bw) {
inline PtrVal make_FloatV(FloatData f, size_t bw=32) {
auto ret = make_simple<FloatV>(f, bw);
return hashconsing(ret);
}

inline PtrVal make_FloatV_fp80(std::array<unsigned char, 10> buf) {
//std::cout << "*(long double*)buf.data(): " << *(long double*) buf.data() << std::endl;
return make_FloatV(*(long double*) buf.data(), 80);
long double f = 0;
std::memcpy(&f, buf.data(), buf.size());
return make_FloatV(f, 80);
}

inline long double proj_FloatV(PtrVal v) {
return v->to_FloatV()->f;
inline FloatData proj_FloatV(const PtrVal& v) {
return v->to_FloatV()->as_ld();
}

inline PtrVal ui_tofp(PtrVal v) {
Expand All @@ -323,13 +344,12 @@ inline PtrVal ui_tofp(PtrVal v) {
inline PtrVal fp_toui(PtrVal v, size_t bw) {
auto fp = v->to_FloatV();
ASSERT(fp != nullptr, "value passed to fp_toui is not a FloatV");
return make_IntV((uint64_t)fp->f, bw);
return make_IntV((uint64_t)fp->as_ld(), bw);
}

inline PtrVal fp_tosi(const PtrVal& v, size_t bw) {
auto fp = v->to_FloatV();
ASSERT(fp != nullptr, "value passed to fp_tosi is not a FloatV");
return make_IntV(fp->f, bw);
ASSERT(v->to_FloatV() != nullptr, "value passed to fp_tosi is not a FloatV");
return make_IntV(proj_FloatV(v), bw);
}

inline PtrVal si_tofp(const PtrVal& v) {
Expand Down Expand Up @@ -892,52 +912,52 @@ inline PtrVal float_op_2(fOP op, const PtrVal& v1, const PtrVal& v2) {
}

if (f1 && f2) {
auto apply = [&](auto x, auto y) -> PtrVal {
switch (op) {
case fOP::op_fadd: return make_FloatV(f1->f + f2->f, MAX(f1->bw, f2->bw));
case fOP::op_fsub: return make_FloatV(f1->f - f2->f, MAX(f1->bw, f2->bw));
case fOP::op_fmul: return make_FloatV(f1->f * f2->f, MAX(f1->bw, f2->bw));
case fOP::op_fdiv: return make_FloatV(f1->f / f2->f, MAX(f1->bw, f2->bw));
case fOP::op_oeq: return make_IntV(f1->f == f2->f, 1);
case fOP::op_ogt: return make_IntV(f1->f > f2->f, 1);
case fOP::op_oge: return make_IntV(f1->f >= f2->f, 1);
case fOP::op_olt: return make_IntV(f1->f < f2->f, 1);
case fOP::op_ole: return make_IntV(f1->f <= f2->f, 1);
case fOP::op_one: return make_IntV(f1->f != f2->f, 1);
case fOP::op_ueq: return make_IntV(f1->f == f2->f, 1);
case fOP::op_ugt: return make_IntV(f1->f > f2->f, 1);
case fOP::op_uge: return make_IntV(f1->f >= f2->f, 1);
case fOP::op_ult: return make_IntV(f1->f < f2->f, 1);
case fOP::op_ule: return make_IntV(f1->f <= f2->f, 1);
case fOP::op_une: return make_IntV(f1->f != f2->f, 1);
case fOP::op_fadd: return make_FloatV(x + y, bw1);
case fOP::op_fsub: return make_FloatV(x - y, bw1);
case fOP::op_fmul: return make_FloatV(x * y, bw1);
case fOP::op_fdiv: return make_FloatV(x / y, bw1);
case fOP::op_oeq: return make_IntV(x == y, 1);
case fOP::op_ogt: return make_IntV(x > y, 1);
case fOP::op_oge: return make_IntV(x >= y, 1);
case fOP::op_olt: return make_IntV(x < y, 1);
case fOP::op_ole: return make_IntV(x <= y, 1);
case fOP::op_one: return make_IntV(x != y, 1);
case fOP::op_ueq: return make_IntV(x == y, 1);
case fOP::op_ugt: return make_IntV(x > y, 1);
case fOP::op_uge: return make_IntV(x >= y, 1);
case fOP::op_ult: return make_IntV(x < y, 1);
case fOP::op_ule: return make_IntV(x <= y, 1);
case fOP::op_une: return make_IntV(x != y, 1);
/* TODO: QNAN <2022-03-10, David Deng> */
case fOP::op_ord: return make_IntV(1);
case fOP::op_uno: return make_IntV(0);
case fOP::const_false: return make_IntV(0, 1);
case fOP::const_true: return make_IntV(1, 1);
}
ABORT("Unknown float_op_2 operation");
ABORT("Unknown float_op_2 operation");};
switch (bw1) {
case 32: return apply(f1->f.f32, f2->f.f32);
case 64: return apply(f1->f.f64, f2->f.f64);
case 80: return apply(f1->f.f80, f2->f.f80);
}
ABORT("Operating on a float of unsupported bitwidth " << bw1);
} else {
ABORT("Non-concrete Float Detected");
}
}
}

/* TODO: implement those two <2022-03-10, David Deng> */

inline PtrVal fp_ext(const PtrVal& v1, int from, int to) {
auto f1 = v1->to_FloatV();
ASSERT((f1 != nullptr), "extending a non-FloatV value");
return make_FloatV(f1->f, to);
return make_FloatV(proj_FloatV(v1), to);
}

inline PtrVal fp_trunc(const PtrVal& v1, int from, int to) {
auto f1 = v1->to_FloatV();
ASSERT((f1 != nullptr), "truncating a non-FloatV value");
/* TODO: support other bw values (e.g. fp80) <2022-03-10, David Deng> */
switch (to) {
case 32: return make_FloatV(float(f1->f), to);
case 64: return make_FloatV(double(f1->f), to);
default: return make_FloatV(f1->f, to);
}
return make_FloatV(proj_FloatV(v1), to);
}

inline std::string ptrval_to_string(const PtrVal& ptr) {
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