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[libc][NFC] Enforce internal linkage for exp* support functions. #76250

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Merged
merged 1 commit into from
Jan 2, 2024
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[libc][NFC] Enforce internal linkage for exp* support functions. #76250

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4 changes: 4 additions & 0 deletions libc/src/math/generic/exp.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,8 @@ constexpr double MLOG_2_EXP2_M12_MID = 0x1.718432a1b0e26p-47;
constexpr double MLOG_2_EXP2_M12_MID_30 = 0x1.718432ap-47;
constexpr double MLOG_2_EXP2_M12_LO = 0x1.b0e2633fe0685p-79;

namespace {

// Polynomial approximations with double precision:
// Return expm1(dx) / x ~ 1 + dx / 2 + dx^2 / 6 + dx^3 / 24.
// For |dx| < 2^-13 + 2^-30:
Expand Down Expand Up @@ -218,6 +220,8 @@ double set_exceptional(double x) {
return x + static_cast<double>(FPBits::inf());
}

} // namespace

LLVM_LIBC_FUNCTION(double, exp, (double x)) {
using FPBits = typename fputil::FPBits<double>;
using FloatProp = typename fputil::FloatProperties<double>;
Expand Down
4 changes: 4 additions & 0 deletions libc/src/math/generic/exp10.cpp
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Expand Up @@ -52,6 +52,8 @@ constexpr double ERR_D = 0x1.8p-63;
// Errors when using double-double precision.
constexpr double ERR_DD = 0x1.8p-99;

namespace {

// Polynomial approximations with double precision. Generated by Sollya with:
// > P = fpminimax((10^x - 1)/x, 3, [|D...|], [-2^-14, 2^-14]);
// > P;
Expand Down Expand Up @@ -268,6 +270,8 @@ double set_exceptional(double x) {
return x + static_cast<double>(FPBits::inf());
}

} // namespace

LLVM_LIBC_FUNCTION(double, exp10, (double x)) {
using FPBits = typename fputil::FPBits<double>;
using FloatProp = typename fputil::FloatProperties<double>;
Expand Down
4 changes: 4 additions & 0 deletions libc/src/math/generic/exp2.cpp
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Expand Up @@ -42,6 +42,8 @@ constexpr double ERR_D = 0x1.8p-63;
// Errors when using double-double precision.
constexpr double ERR_DD = 0x1.0p-100;

namespace {

// Polynomial approximations with double precision. Generated by Sollya with:
// > P = fpminimax((2^x - 1)/x, 3, [|D...|], [-2^-13 - 2^-30, 2^-13 + 2^-30]);
// > P;
Expand Down Expand Up @@ -243,6 +245,8 @@ double set_exceptional(double x) {
return x + static_cast<double>(FPBits::inf());
}

} // namespace

LLVM_LIBC_FUNCTION(double, exp2, (double x)) {
using FPBits = typename fputil::FPBits<double>;
using FloatProp = typename fputil::FloatProperties<double>;
Expand Down
4 changes: 4 additions & 0 deletions libc/src/math/generic/expm1.cpp
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Expand Up @@ -61,6 +61,8 @@ constexpr double MLOG_2_EXP2_M12_MID = 0x1.718432a1b0e26p-47;
constexpr double MLOG_2_EXP2_M12_MID_30 = 0x1.718432ap-47;
constexpr double MLOG_2_EXP2_M12_LO = 0x1.b0e2633fe0685p-79;

namespace {

// Polynomial approximations with double precision:
// Return expm1(dx) / x ~ 1 + dx / 2 + dx^2 / 6 + dx^3 / 24.
// For |dx| < 2^-13 + 2^-30:
Expand Down Expand Up @@ -269,6 +271,8 @@ double set_exceptional(double x) {
return x + static_cast<double>(FPBits::inf());
}

} // namespace

LLVM_LIBC_FUNCTION(double, expm1, (double x)) {
using FPBits = typename fputil::FPBits<double>;
using FloatProp = typename fputil::FloatProperties<double>;
Expand Down