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Merge pull request rust-lang#34 from rust-lang/feature/round
Feature/round
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,153 @@ | ||
macro_rules! implement { | ||
{ | ||
impl $type:ident { | ||
int_type = $int_type:ident, | ||
floor = $floor_intrinsic:literal, | ||
ceil = $ceil_intrinsic:literal, | ||
round = $round_intrinsic:literal, | ||
trunc = $trunc_intrinsic:literal, | ||
} | ||
} => { | ||
mod $type { | ||
#[allow(improper_ctypes)] | ||
extern "C" { | ||
#[link_name = $floor_intrinsic] | ||
fn floor_intrinsic(x: crate::$type) -> crate::$type; | ||
#[link_name = $ceil_intrinsic] | ||
fn ceil_intrinsic(x: crate::$type) -> crate::$type; | ||
#[link_name = $round_intrinsic] | ||
fn round_intrinsic(x: crate::$type) -> crate::$type; | ||
#[link_name = $trunc_intrinsic] | ||
fn trunc_intrinsic(x: crate::$type) -> crate::$type; | ||
} | ||
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impl crate::$type { | ||
/// Returns the largest integer less than or equal to each lane. | ||
#[must_use = "method returns a new vector and does not mutate the original value"] | ||
#[inline] | ||
pub fn floor(self) -> Self { | ||
unsafe { floor_intrinsic(self) } | ||
} | ||
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/// Returns the smallest integer greater than or equal to each lane. | ||
#[must_use = "method returns a new vector and does not mutate the original value"] | ||
#[inline] | ||
pub fn ceil(self) -> Self { | ||
unsafe { ceil_intrinsic(self) } | ||
} | ||
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/// Returns the nearest integer to each lane. Round half-way cases away from 0.0. | ||
#[must_use = "method returns a new vector and does not mutate the original value"] | ||
#[inline] | ||
pub fn round(self) -> Self { | ||
unsafe { round_intrinsic(self) } | ||
} | ||
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/// Returns the integer part of each lane. | ||
#[must_use = "method returns a new vector and does not mutate the original value"] | ||
#[inline] | ||
pub fn trunc(self) -> Self { | ||
unsafe { trunc_intrinsic(self) } | ||
} | ||
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/// Returns the fractional part of each lane. | ||
#[must_use = "method returns a new vector and does not mutate the original value"] | ||
#[inline] | ||
pub fn fract(self) -> Self { | ||
self - self.trunc() | ||
} | ||
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/// Rounds toward zero and converts to the same-width integer type, assuming that | ||
/// the value is finite and fits in that type. | ||
/// | ||
/// # Safety | ||
/// The value must: | ||
/// | ||
/// * Not be NaN | ||
/// * Not be infinite | ||
/// * Be representable in the return type, after truncating off its fractional part | ||
#[inline] | ||
pub unsafe fn to_int_unchecked(self) -> crate::$int_type { | ||
crate::intrinsics::simd_cast(self) | ||
} | ||
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/// Creates a floating-point vector from an integer vector. Rounds values that are | ||
/// not exactly representable. | ||
#[inline] | ||
pub fn round_from_int(value: crate::$int_type) -> Self { | ||
unsafe { crate::intrinsics::simd_cast(value) } | ||
} | ||
} | ||
} | ||
} | ||
} | ||
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implement! { | ||
impl f32x2 { | ||
int_type = i32x2, | ||
floor = "llvm.floor.v2f32", | ||
ceil = "llvm.ceil.v2f32", | ||
round = "llvm.round.v2f32", | ||
trunc = "llvm.trunc.v2f32", | ||
} | ||
} | ||
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implement! { | ||
impl f32x4 { | ||
int_type = i32x4, | ||
floor = "llvm.floor.v4f32", | ||
ceil = "llvm.ceil.v4f32", | ||
round = "llvm.round.v4f32", | ||
trunc = "llvm.trunc.v4f32", | ||
} | ||
} | ||
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implement! { | ||
impl f32x8 { | ||
int_type = i32x8, | ||
floor = "llvm.floor.v8f32", | ||
ceil = "llvm.ceil.v8f32", | ||
round = "llvm.round.v8f32", | ||
trunc = "llvm.trunc.v8f32", | ||
} | ||
} | ||
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implement! { | ||
impl f32x16 { | ||
int_type = i32x16, | ||
floor = "llvm.floor.v16f32", | ||
ceil = "llvm.ceil.v16f32", | ||
round = "llvm.round.v16f32", | ||
trunc = "llvm.trunc.v16f32", | ||
} | ||
} | ||
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implement! { | ||
impl f64x2 { | ||
int_type = i64x2, | ||
floor = "llvm.floor.v2f64", | ||
ceil = "llvm.ceil.v2f64", | ||
round = "llvm.round.v2f64", | ||
trunc = "llvm.trunc.v2f64", | ||
} | ||
} | ||
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implement! { | ||
impl f64x4 { | ||
int_type = i64x4, | ||
floor = "llvm.floor.v4f64", | ||
ceil = "llvm.ceil.v4f64", | ||
round = "llvm.round.v4f64", | ||
trunc = "llvm.trunc.v4f64", | ||
} | ||
} | ||
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implement! { | ||
impl f64x8 { | ||
int_type = i64x8, | ||
floor = "llvm.floor.v8f64", | ||
ceil = "llvm.ceil.v8f64", | ||
round = "llvm.round.v8f64", | ||
trunc = "llvm.trunc.v8f64", | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
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@@ -1,6 +1,6 @@ | ||
use super::helpers; | ||
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float_tests! { f32x2, f32 } | ||
float_tests! { f32x4, f32 } | ||
float_tests! { f32x8, f32 } | ||
float_tests! { f32x16, f32 } | ||
float_tests! { f32x2, f32, i32x2, i32 } | ||
float_tests! { f32x4, f32, i32x4, i32 } | ||
float_tests! { f32x8, f32, i32x8, i32 } | ||
float_tests! { f32x16, f32, i32x16, i32 } |
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Original file line number | Diff line number | Diff line change |
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@@ -1,5 +1,5 @@ | ||
use super::helpers; | ||
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float_tests! { f64x2, f64 } | ||
float_tests! { f64x4, f64 } | ||
float_tests! { f64x8, f64 } | ||
float_tests! { f64x2, f64, i64x2, i64 } | ||
float_tests! { f64x4, f64, i64x4, i64 } | ||
float_tests! { f64x8, f64, i64x8, i64 } |
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