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Remove functions calling the deprecated _MM_SET_FLUSH_ZERO_MODE #912

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Remove functions calling the deprecated _MM_SET_FLUSH_ZERO_MODE #912

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5c532ec
remove deprecated ftz intrinsics
rainiwu Jan 26, 2024
fb91f13
suppress spurious cargo clippy warning
rainiwu Jan 26, 2024
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1 change: 1 addition & 0 deletions dfdx-core/src/data/collate.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,7 @@ impl<A, B> Collate for Vec<(A, B)> {
impl<'a, A, B> Collate for Vec<&'a (A, B)> {
type Collated = (Vec<&'a A>, Vec<&'a B>);
fn collated(self) -> Self::Collated {
#[allow(clippy::map_identity)]
self.into_iter().map(|(a, b)| (a, b)).unzip()
}
}
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38 changes: 0 additions & 38 deletions dfdx-core/src/lib.rs
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Expand Up @@ -128,44 +128,6 @@ pub mod prelude {
pub use crate::tensor_ops::*;
}

/// Sets a CPU `sse` flag to flush denormal floating point numbers to zero. The opposite of this is [keep_denormals()].
///
/// Some resources:
/// 1. [Effects of Flush-To-Zero mode](https://developer.arm.com/documentation/dui0473/c/neon-and-vfp-programming/the-effects-of-using-flush-to-zero-mode?lang=en)
/// 2. [When to use Flush-To-Zero mode](https://developer.arm.com/documentation/dui0473/c/neon-and-vfp-programming/when-to-use-flush-to-zero-mode?lang=en)
pub fn flush_denormals_to_zero() {
#[cfg(all(target_arch = "x86", target_feature = "sse"))]
{
use std::arch::x86::{_MM_FLUSH_ZERO_ON, _MM_SET_FLUSH_ZERO_MODE};
unsafe { _MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON) }
}

#[cfg(all(target_arch = "x86_64", target_feature = "sse"))]
{
use std::arch::x86_64::{_MM_FLUSH_ZERO_ON, _MM_SET_FLUSH_ZERO_MODE};
unsafe { _MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON) }
}
}

/// Sets a CPU flag to keep denormal floating point numbers. The opposite of this is [flush_denormals_to_zero()].
///
/// Some resources:
/// 1. [Effects of Flush-To-Zero mode](https://developer.arm.com/documentation/dui0473/c/neon-and-vfp-programming/the-effects-of-using-flush-to-zero-mode?lang=en)
/// 2. [When to use Flush-To-Zero mode](https://developer.arm.com/documentation/dui0473/c/neon-and-vfp-programming/when-to-use-flush-to-zero-mode?lang=en)
pub fn keep_denormals() {
#[cfg(all(target_arch = "x86", target_feature = "sse"))]
{
use std::arch::x86::{_MM_FLUSH_ZERO_OFF, _MM_SET_FLUSH_ZERO_MODE};
unsafe { _MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_OFF) }
}

#[cfg(all(target_arch = "x86_64", target_feature = "sse"))]
{
use std::arch::x86_64::{_MM_FLUSH_ZERO_OFF, _MM_SET_FLUSH_ZERO_MODE};
unsafe { _MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_OFF) }
}
}

#[cfg(test)]
pub(crate) mod tests {
pub use num_traits::{Float, NumCast, Zero};
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3 changes: 0 additions & 3 deletions dfdx/examples/12-mnist.rs
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Expand Up @@ -62,9 +62,6 @@ type Mlp = (
const BATCH_SIZE: usize = 32;

fn main() {
// ftz substantially improves performance
dfdx::flush_denormals_to_zero();

let mnist_path = std::env::args()
.nth(1)
.unwrap_or_else(|| "./datasets/MNIST/raw".to_string());
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