diff options
| -rw-r--r-- | library/compiler-builtins/libm/src/math/fenv.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/library/compiler-builtins/libm/src/math/fenv.rs b/library/compiler-builtins/libm/src/math/fenv.rs index c91272e8268..328c9f3467c 100644 --- a/library/compiler-builtins/libm/src/math/fenv.rs +++ b/library/compiler-builtins/libm/src/math/fenv.rs @@ -5,6 +5,9 @@ pub(crate) const FE_UNDERFLOW: i32 = 0; pub(crate) const FE_INEXACT: i32 = 0; pub(crate) const FE_TONEAREST: i32 = 0; +pub(crate) const FE_DOWNWARD: i32 = 1; +pub(crate) const FE_UPWARD: i32 = 2; +pub(crate) const FE_TOWARDZERO: i32 = 3; #[inline] pub(crate) fn feclearexcept(_mask: i32) -> i32 { @@ -25,3 +28,22 @@ pub(crate) fn fetestexcept(_mask: i32) -> i32 { pub(crate) fn fegetround() -> i32 { FE_TONEAREST } + +#[derive(Clone, Copy, Debug, PartialEq)] +pub(crate) enum Rounding { + Nearest = FE_TONEAREST as isize, + Downward = FE_DOWNWARD as isize, + Upward = FE_UPWARD as isize, + ToZero = FE_TOWARDZERO as isize, +} + +impl Rounding { + pub(crate) fn get() -> Self { + match fegetround() { + x if x == FE_DOWNWARD => Self::Downward, + x if x == FE_UPWARD => Self::Upward, + x if x == FE_TOWARDZERO => Self::ToZero, + _ => Self::Nearest, + } + } +} |