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[flang][runtime] Add build-time flags to runtime to adjust SELECTED_x_KIND() #105575

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Merged
merged 1 commit into from
Aug 21, 2024
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[flang][runtime] Add build-time flags to runtime to adjust SELECTED_x_KIND() #105575

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37 changes: 23 additions & 14 deletions flang/runtime/numeric.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -105,7 +105,7 @@ inline RT_API_ATTRS CppTypeFor<TypeCategory::Integer, 4> SelectedIntKind(T x) {
return 4;
} else if (x <= 18) {
return 8;
#ifdef __SIZEOF_INT128__
#if defined __SIZEOF_INT128__ && !defined FLANG_RUNTIME_NO_INTEGER_16
} else if (x <= 38) {
return 16;
#endif
Expand Down Expand Up @@ -137,23 +137,35 @@ inline RT_API_ATTRS CppTypeFor<TypeCategory::Integer, 4> SelectedRealKind(
return -5;
}

#ifndef FLANG_RUNTIME_NO_REAL_2
constexpr bool hasReal2{true};
#else
constexpr bool hasReal2{false};
#endif
#if defined LDBL_MANT_DIG == 64 && !defined FLANG_RUNTIME_NO_REAL_10
constexpr bool hasReal10{true};
#else
constexpr bool hasReal10{false};
#endif
#if (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && \
!defined FLANG_RUNTIME_NO_REAL_16
constexpr bool hasReal16{true};
#else
constexpr bool hasReal16{false};
#endif

int error{0};
int kind{0};
if (p <= 3) {
if (hasReal2 && p <= 3) {
kind = 2;
} else if (p <= 6) {
kind = 4;
} else if (p <= 15) {
kind = 8;
#if LDBL_MANT_DIG == 64
} else if (p <= 18) {
} else if (hasReal10 && p <= 18) {
kind = 10;
} else if (p <= 33) {
kind = 16;
#elif LDBL_MANT_DIG == 113
} else if (p <= 33) {
} else if (hasReal16 && p <= 33) {
kind = 16;
#endif
} else {
error -= 1;
}
Expand All @@ -164,13 +176,10 @@ inline RT_API_ATTRS CppTypeFor<TypeCategory::Integer, 4> SelectedRealKind(
kind = kind < 3 ? (p == 3 ? 4 : 3) : kind;
} else if (r <= 307) {
kind = kind < 8 ? 8 : kind;
#if LDBL_MANT_DIG == 64
} else if (r <= 4931) {
} else if (hasReal10 && r <= 4931) {
kind = kind < 10 ? 10 : kind;
#elif LDBL_MANT_DIG == 113
} else if (r <= 4931) {
} else if (hasReal16 && r <= 4931) {
kind = kind < 16 ? 16 : kind;
#endif
} else {
error -= 2;
}
Expand Down
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