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Add basic library support for f16 and f128
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Implement basic operation traits that get lowered to intrinsics. This
does not yet create a new module for these types.

Additionally, add codegn tests for the implemented operations.
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tgross35 committed Mar 14, 2024
1 parent 5ac0b2d commit 5bdb9dd
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3 changes: 3 additions & 0 deletions library/core/src/clone.rs
Original file line number Diff line number Diff line change
Expand Up @@ -231,6 +231,9 @@ mod impls {
bool char
}

#[cfg(not(bootstrap))]
impl_clone! { f16 f128 }

#[unstable(feature = "never_type", issue = "35121")]
impl Clone for ! {
#[inline]
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6 changes: 6 additions & 0 deletions library/core/src/cmp.rs
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Expand Up @@ -1489,6 +1489,9 @@ mod impls {
bool char usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64
}

#[cfg(not(bootstrap))]
partial_eq_impl! { f16 f128 }

macro_rules! eq_impl {
($($t:ty)*) => ($(
#[stable(feature = "rust1", since = "1.0.0")]
Expand Down Expand Up @@ -1541,6 +1544,9 @@ mod impls {

partial_ord_impl! { f32 f64 }

#[cfg(not(bootstrap))]
partial_ord_impl! { f16 f128 }

macro_rules! ord_impl {
($($t:ty)*) => ($(
#[stable(feature = "rust1", since = "1.0.0")]
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17 changes: 17 additions & 0 deletions library/core/src/convert/num.rs
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Expand Up @@ -38,6 +38,11 @@ macro_rules! impl_float_to_int {
impl_float_to_int!(f32 => u8, u16, u32, u64, u128, usize, i8, i16, i32, i64, i128, isize);
impl_float_to_int!(f64 => u8, u16, u32, u64, u128, usize, i8, i16, i32, i64, i128, isize);

#[cfg(not(bootstrap))]
impl_float_to_int!(f16 => u8, u16, u32, u64, u128, usize, i8, i16, i32, i64, i128, isize);
#[cfg(not(bootstrap))]
impl_float_to_int!(f128 => u8, u16, u32, u64, u128, usize, i8, i16, i32, i64, i128, isize);

// Conversion traits for primitive integer and float types
// Conversions T -> T are covered by a blanket impl and therefore excluded
// Some conversions from and to usize/isize are not implemented due to portability concerns
Expand Down Expand Up @@ -166,6 +171,18 @@ impl_from!(u32 => f64, #[stable(feature = "lossless_float_conv", since = "1.6.0"
// float -> float
impl_from!(f32 => f64, #[stable(feature = "lossless_float_conv", since = "1.6.0")]);

// todo: these are insta-stable regardless of the gate, right?
#[cfg(not(bootstrap))]
impl_from! { f16 => f32, #[stable(feature = "lossless_float_conv", since = "1.6.0")] }
#[cfg(not(bootstrap))]
impl_from! { f16 => f64, #[stable(feature = "lossless_float_conv", since = "1.6.0")] }
#[cfg(not(bootstrap))]
impl_from! { f16 => f128, #[stable(feature = "lossless_float_conv", since = "1.6.0")] }
#[cfg(not(bootstrap))]
impl_from! { f32 => f128, #[stable(feature = "lossless_float_conv", since = "1.6.0")] }
#[cfg(not(bootstrap))]
impl_from! { f64 => f128, #[stable(feature = "lossless_float_conv", since = "1.6.0")] }

macro_rules! impl_float_from_bool {
($float:ty) => {
#[stable(feature = "float_from_bool", since = "1.68.0")]
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5 changes: 5 additions & 0 deletions library/core/src/default.rs
Original file line number Diff line number Diff line change
Expand Up @@ -178,3 +178,8 @@ default_impl! { i128, 0, "Returns the default value of `0`" }

default_impl! { f32, 0.0f32, "Returns the default value of `0.0`" }
default_impl! { f64, 0.0f64, "Returns the default value of `0.0`" }

#[cfg(not(bootstrap))]
default_impl! { f16, 0.0f16, "Returns the default value of `0.0`" }
#[cfg(not(bootstrap))]
default_impl! { f128, 0.0f128, "Returns the default value of `0.0`" }
5 changes: 5 additions & 0 deletions library/core/src/fmt/nofloat.rs
Original file line number Diff line number Diff line change
Expand Up @@ -13,3 +13,8 @@ macro_rules! floating {

floating! { f32 }
floating! { f64 }

#[cfg(not(bootstrap))]
floating! { f16 }
#[cfg(not(bootstrap))]
floating! { f128 }
2 changes: 2 additions & 0 deletions library/core/src/lib.rs
Original file line number Diff line number Diff line change
Expand Up @@ -205,6 +205,8 @@
#![cfg_attr(bootstrap, feature(diagnostic_namespace))]
#![cfg_attr(bootstrap, feature(exhaustive_patterns))]
#![cfg_attr(bootstrap, feature(platform_intrinsics))]
#![cfg_attr(not(bootstrap), feature(f128))]
#![cfg_attr(not(bootstrap), feature(f16))]
#![cfg_attr(not(bootstrap), feature(freeze_impls))]
#![cfg_attr(not(bootstrap), feature(min_exhaustive_patterns))]
#![feature(abi_unadjusted)]
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7 changes: 7 additions & 0 deletions library/core/src/marker.rs
Original file line number Diff line number Diff line change
Expand Up @@ -429,6 +429,13 @@ marker_impls! {

}

// todo: which feature gate should we use?
#[cfg(not(bootstrap))]
marker_impls! {
#[stable(feature = "rust1", since = "1.0.0")]
Copy for f16, f128
}

#[unstable(feature = "never_type", issue = "35121")]
impl Copy for ! {}

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33 changes: 33 additions & 0 deletions library/core/src/ops/arith.rs
Original file line number Diff line number Diff line change
Expand Up @@ -111,6 +111,9 @@ macro_rules! add_impl {

add_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }

#[cfg(not(bootstrap))]
add_impl! { f16 f128 }

/// The subtraction operator `-`.
///
/// Note that `Rhs` is `Self` by default, but this is not mandatory. For
Expand Down Expand Up @@ -220,6 +223,9 @@ macro_rules! sub_impl {

sub_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }

#[cfg(not(bootstrap))]
sub_impl! { f16 f128 }

/// The multiplication operator `*`.
///
/// Note that `Rhs` is `Self` by default, but this is not mandatory.
Expand Down Expand Up @@ -350,6 +356,9 @@ macro_rules! mul_impl {

mul_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }

#[cfg(not(bootstrap))]
mul_impl! { f16 f128 }

/// The division operator `/`.
///
/// Note that `Rhs` is `Self` by default, but this is not mandatory.
Expand Down Expand Up @@ -508,6 +517,9 @@ macro_rules! div_impl_float {

div_impl_float! { f32 f64 }

#[cfg(not(bootstrap))]
div_impl_float! { f16 f128 }

/// The remainder operator `%`.
///
/// Note that `Rhs` is `Self` by default, but this is not mandatory.
Expand Down Expand Up @@ -625,6 +637,9 @@ macro_rules! rem_impl_float {

rem_impl_float! { f32 f64 }

#[cfg(not(bootstrap))]
rem_impl_float! { f16 f128 }

/// The unary negation operator `-`.
///
/// # Examples
Expand Down Expand Up @@ -700,6 +715,9 @@ macro_rules! neg_impl {

neg_impl! { isize i8 i16 i32 i64 i128 f32 f64 }

#[cfg(not(bootstrap))]
neg_impl! { f16 f128 }

/// The addition assignment operator `+=`.
///
/// # Examples
Expand Down Expand Up @@ -767,6 +785,9 @@ macro_rules! add_assign_impl {

add_assign_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }

#[cfg(not(bootstrap))]
add_assign_impl! { f16 f128 }

/// The subtraction assignment operator `-=`.
///
/// # Examples
Expand Down Expand Up @@ -834,6 +855,9 @@ macro_rules! sub_assign_impl {

sub_assign_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }

#[cfg(not(bootstrap))]
sub_assign_impl! { f16 f128 }

/// The multiplication assignment operator `*=`.
///
/// # Examples
Expand Down Expand Up @@ -892,6 +916,9 @@ macro_rules! mul_assign_impl {

mul_assign_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }

#[cfg(not(bootstrap))]
mul_assign_impl! { f16 f128 }

/// The division assignment operator `/=`.
///
/// # Examples
Expand Down Expand Up @@ -949,6 +976,9 @@ macro_rules! div_assign_impl {

div_assign_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }

#[cfg(not(bootstrap))]
div_assign_impl! { f16 f128 }

/// The remainder assignment operator `%=`.
///
/// # Examples
Expand Down Expand Up @@ -1009,3 +1039,6 @@ macro_rules! rem_assign_impl {
}

rem_assign_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }

#[cfg(not(bootstrap))]
rem_assign_impl! { f16 f128 }
129 changes: 129 additions & 0 deletions tests/codegen/float/f128.rs
Original file line number Diff line number Diff line change
@@ -0,0 +1,129 @@
// Verify that our intrinsics generate the correct LLVM calls for f128

#![crate_type = "lib"]
#![feature(f128)]
#![feature(core_intrinsics)]

// CHECK-LABEL: i1 @f128_eq(
#[no_mangle]
pub fn f128_eq(a: f128, b: f128) -> bool {
// CHECK: fcmp oeq fp128 %{{.+}}, %{{.+}}
a == b
}

// CHECK-LABEL: i1 @f128_ne(
#[no_mangle]
pub fn f128_ne(a: f128, b: f128) -> bool {
// CHECK: fcmp une fp128 %{{.+}}, %{{.+}}
a != b
}

// CHECK-LABEL: i1 @f128_gt(
#[no_mangle]
pub fn f128_gt(a: f128, b: f128) -> bool {
// CHECK: fcmp ogt fp128 %{{.+}}, %{{.+}}
a > b
}

// CHECK-LABEL: i1 @f128_ge(
#[no_mangle]
pub fn f128_ge(a: f128, b: f128) -> bool {
// CHECK: fcmp oge fp128 %{{.+}}, %{{.+}}
a >= b
}

// CHECK-LABEL: i1 @f128_lt(
#[no_mangle]
pub fn f128_lt(a: f128, b: f128) -> bool {
// CHECK: fcmp olt fp128 %{{.+}}, %{{.+}}
a < b
}

// CHECK-LABEL: i1 @f128_le(
#[no_mangle]
pub fn f128_le(a: f128, b: f128) -> bool {
// CHECK: fcmp ole fp128 %{{.+}}, %{{.+}}
a <= b
}

// CHECK-LABEL: fp128 @f128_neg(
#[no_mangle]
pub fn f128_neg(a: f128) -> f128 {
// CHECK: fneg fp128
-a
}

// CHECK-LABEL: fp128 @f128_add(
#[no_mangle]
pub fn f128_add(a: f128, b: f128) -> f128 {
// CHECK: fadd fp128 %{{.+}}, %{{.+}}
a + b
}

// CHECK-LABEL: fp128 @f128_sub(
#[no_mangle]
pub fn f128_sub(a: f128, b: f128) -> f128 {
// CHECK: fsub fp128 %{{.+}}, %{{.+}}
a - b
}

// CHECK-LABEL: fp128 @f128_mul(
#[no_mangle]
pub fn f128_mul(a: f128, b: f128) -> f128 {
// CHECK: fmul fp128 %{{.+}}, %{{.+}}
a * b
}

// CHECK-LABEL: fp128 @f128_div(
#[no_mangle]
pub fn f128_div(a: f128, b: f128) -> f128 {
// CHECK: fdiv fp128 %{{.+}}, %{{.+}}
a / b
}

// CHECK-LABEL: fp128 @f128_rem(
#[no_mangle]
pub fn f128_rem(a: f128, b: f128) -> f128 {
// CHECK: frem fp128 %{{.+}}, %{{.+}}
a % b
}

// CHECK-LABEL: void @f128_add_assign(
#[no_mangle]
pub fn f128_add_assign(a: &mut f128, b: f128) {
// CHECK: fadd fp128 %{{.+}}, %{{.+}}
// CHECK-NEXT: store fp128 %{{.+}}, ptr %{{.+}}
*a += b;
}

// CHECK-LABEL: void @f128_sub_assign(
#[no_mangle]
pub fn f128_sub_assign(a: &mut f128, b: f128) {
// CHECK: fsub fp128 %{{.+}}, %{{.+}}
// CHECK-NEXT: store fp128 %{{.+}}, ptr %{{.+}}
*a -= b;
}

// CHECK-LABEL: void @f128_mul_assign(
#[no_mangle]
pub fn f128_mul_assign(a: &mut f128, b: f128) {
// CHECK: fmul fp128 %{{.+}}, %{{.+}}
// CHECK-NEXT: store fp128 %{{.+}}, ptr %{{.+}}
*a *= b
}

// CHECK-LABEL: void @f128_div_assign(
#[no_mangle]
pub fn f128_div_assign(a: &mut f128, b: f128) {
// CHECK: fdiv fp128 %{{.+}}, %{{.+}}
// CHECK-NEXT: store fp128 %{{.+}}, ptr %{{.+}}
*a /= b
}

// CHECK-LABEL: void @f128_rem_assign(
#[no_mangle]
pub fn f128_rem_assign(a: &mut f128, b: f128) {
// CHECK: frem fp128 %{{.+}}, %{{.+}}
// CHECK-NEXT: store fp128 %{{.+}}, ptr %{{.+}}
*a %= b
}
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