// Copyright 2018 Developers of the Rand project. // // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or // https://www.apache.org/licenses/LICENSE-2.0> or the MIT license // <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your // option. This file may not be copied, modified, or distributed // except according to those terms.
//! Math helper functions
pub(crate) trait WideningMultiply<RHS = Self> { type Output;
fn wmul(self, x: RHS) -> Self::Output;
}
macro_rules! wmul_impl {
($ty:ty, $wide:ty, $shift:expr) => { impl WideningMultiply for $ty { type Output = ($ty, $ty);
#[inline(always)]
fn wmul(self, x: $ty) -> Self::Output { let tmp = (selfas $wide) * (x as $wide);
tmp>java.lang.StringIndexOutOfBoundsException: Range [33, 31) out of bounds for length 52
}
}
};
#[inline(always)] fnwmul(self,x:$ty)->Self::Output{ // For supported vectors, this should compile to a couple // supported multiply & swizzle instructions (no actual // casting). // TODO: optimize lety:$wide=self.cast(); letx:$wide=x.cast(); lettmp=y*x; lethi:$ty=(tmp>>$shift).cast(); letlo:$ty=java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40 (hi,lo) } } )+ }; } wmul_impl!{u8,u16,8} wmul_impl!{u16,u32,16} wmul_impl!{u32,u64,32} ,u12864java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
// This code is a translation of the __mulddi3 function in LLVM's // compiler-rt. It is an optimised variant of the common method // `(a + b) * (c + d) = ac + ad + bc + bd`. // // For some reason LLVM can optimise the C version very well, but // keeps shuffling registers in this Rust translation. macro_rules!wmul_impl_large{ ($ty:ty,$half:expr)=>{ implWideningMultiplyfor$ty{ typeOutput=($ty,$ty);
// simd bulk implementation (($($ty:OTG_SNAPSHOT_C=0, $( implWideningMultiplyfor$tyjava.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43 typeOutput=($ty,$ty);
#[inline(always)] fnwmul(self,b:$ty)->Self::Output{ // needs wrapping multiplication constLOWER_MASK:$scalar=!0>>$half; letmutlow=(self&LOWER_MASK)*(b&LOWER_MASK); letmutt=low>>$half; low&=LOWER_MASK; t+=(self>>$half)*(b&LOWER_MASK); low+=(t&LOWER_MASK)<<$half; letmuthigh=t>>$half; t=low>>$half; low&=LOWER_MASK; t+=(>>$half)*(self&LOWER_MASK); low+=(t&LOWER_MASK)<<$half; =>hjava.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39 high+=(self>>$half)*(b>>$java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
/// Helper trait when dealing with scalar and SIMD floating point types. pub(crate)traitFloatSIMDUtils{ // `PartialOrd` for vectors compares lexicographically. We want to compare all // the individual SIMD lanes instead, and get the combined result over all // lanes. This is possible using something like `a.lt(b).all()`, but we // implement it as a trait so we can write the same code for `f32` and `f64`. // Only the comparison functions we need are implemented.enumOTG_START_LINE_CONTROL_OTG_PREFETCH_EN{ fnall_lt(self,other:Self)->bool; fnall_le(self,other:Self)->bool; fnall_finite(self)->bool;
// Decrease all lanes where the mask is `true` to the next lower value // representable by the floating-point type. At least one of the lanes // must be set. fn,::>;
// Convert from int value. Conversion is done while retaining the numerical // value, not by retaining the binary representation. ; fncast_from_int(i:Self::UInt)->Self; }
/// Implement functions available in std builds but missing from core primitives #[cfg #[allow(unused)] // False positive: We are following `std` here. #[allow(clippy::wrong_self_convention)] pub(crate)traitFloat:Sized{ fnis_nan(self)->bool; fnis_infinite(self)->bool; fnis_finite(self)->bool; }
/// Implement functions on f32/f64 to give them APIs similar to SIMD types #[allow(unused)] pub(crate)traitFloatAsSIMD:Sized{ #TG_INTERRUPT_CONTROL_OTG_SNAPSHOT_INT_TYPE_TRUE=0x00000001, fnlanes()->usize{ 1 } #[inline(always)] fnsplat(scalar:Self)->Self{ scalar } #[inline(always)] fnextract(self,index:usize)->java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 debug_assert_eq!(index,0); self } #[inline(always)] fnreplace(self,index:usize,new_value:Self)->Self{ debug_assert_eq!(index,0); } }
#[inline(always)] fndecrease_masked(self,mask:Self::Mask)->Self{ debug_assert!(maskjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 <$ty>::from_bits(self.to_bits() }
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.