Skip to content

Implement reduce_min()/reduce_max() and their precise variants #358

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
Shnatsel merged 5 commits into from
Aug 30, 2026
Merged

Implement reduce_min()/reduce_max() and their precise variants #358

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
de0871a
Implement reduce_min()/reduce_max() and their precise variants
Shnatsel Aug 28, 2026
a9a9d4a
Placate Clippy; I hate that I have to add special-casing for the bare…
Shnatsel Aug 28, 2026
6890233
Reword comment
Shnatsel Aug 30, 2026
578ce36
Fully write out inputs for reduce_min/max tests
Shnatsel Aug 30, 2026
b0b4299
cargo fmt
Shnatsel Aug 30, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
420 changes: 420 additions & 0 deletions fearless_simd/src/generated/avx2.rs
View file
Open in desktop

Large diffs are not rendered by default.

396 changes: 396 additions & 0 deletions fearless_simd/src/generated/avx512.rs
View file
Open in desktop

Large diffs are not rendered by default.

272 changes: 272 additions & 0 deletions fearless_simd/src/generated/fallback.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -297,6 +297,42 @@ impl Simd for Fallback {
.simd_into(self)
}
#[inline(always)]
fn reduce_max_f32x4(self, a: f32x4<Self>) -> f32 {
let reduced: [f32; 2usize] = [
f32::max(a[0usize], a[1usize]),
f32::max(a[2usize], a[3usize]),
];
let reduced: [f32; 1usize] = [f32::max(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn reduce_min_f32x4(self, a: f32x4<Self>) -> f32 {
let reduced: [f32; 2usize] = [
f32::min(a[0usize], a[1usize]),
f32::min(a[2usize], a[3usize]),
];
let reduced: [f32; 1usize] = [f32::min(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn reduce_max_precise_f32x4(self, a: f32x4<Self>) -> f32 {
let reduced: [f32; 2usize] = [
f32::max(a[0usize], a[1usize]),
f32::max(a[2usize], a[3usize]),
];
let reduced: [f32; 1usize] = [f32::max(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn reduce_min_precise_f32x4(self, a: f32x4<Self>) -> f32 {
let reduced: [f32; 2usize] = [
f32::min(a[0usize], a[1usize]),
f32::min(a[2usize], a[3usize]),
];
let reduced: [f32; 1usize] = [f32::min(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn max_f32x4(self, a: f32x4<Self>, b: f32x4<Self>) -> f32x4<Self> {
[
f32::max(a[0usize], b[0usize]),
Expand Down Expand Up @@ -883,6 +919,56 @@ impl Simd for Fallback {
.simd_into(self)
}
#[inline(always)]
fn reduce_max_i8x16(self, a: i8x16<Self>) -> i8 {
let reduced: [i8; 8usize] = [
i8::max(a[0usize], a[1usize]),
i8::max(a[2usize], a[3usize]),
i8::max(a[4usize], a[5usize]),
i8::max(a[6usize], a[7usize]),
i8::max(a[8usize], a[9usize]),
i8::max(a[10usize], a[11usize]),
i8::max(a[12usize], a[13usize]),
i8::max(a[14usize], a[15usize]),
];
let reduced: [i8; 4usize] = [
i8::max(reduced[0usize], reduced[1usize]),
i8::max(reduced[2usize], reduced[3usize]),
i8::max(reduced[4usize], reduced[5usize]),
i8::max(reduced[6usize], reduced[7usize]),
];
let reduced: [i8; 2usize] = [
i8::max(reduced[0usize], reduced[1usize]),
i8::max(reduced[2usize], reduced[3usize]),
];
let reduced: [i8; 1usize] = [i8::max(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn reduce_min_i8x16(self, a: i8x16<Self>) -> i8 {
let reduced: [i8; 8usize] = [
i8::min(a[0usize], a[1usize]),
i8::min(a[2usize], a[3usize]),
i8::min(a[4usize], a[5usize]),
i8::min(a[6usize], a[7usize]),
i8::min(a[8usize], a[9usize]),
i8::min(a[10usize], a[11usize]),
i8::min(a[12usize], a[13usize]),
i8::min(a[14usize], a[15usize]),
];
let reduced: [i8; 4usize] = [
i8::min(reduced[0usize], reduced[1usize]),
i8::min(reduced[2usize], reduced[3usize]),
i8::min(reduced[4usize], reduced[5usize]),
i8::min(reduced[6usize], reduced[7usize]),
];
let reduced: [i8; 2usize] = [
i8::min(reduced[0usize], reduced[1usize]),
i8::min(reduced[2usize], reduced[3usize]),
];
let reduced: [i8; 1usize] = [i8::min(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn max_i8x16(self, a: i8x16<Self>, b: i8x16<Self>) -> i8x16<Self> {
[
i8::max(a[0usize], b[0usize]),
Expand Down Expand Up @@ -1733,6 +1819,56 @@ impl Simd for Fallback {
.simd_into(self)
}
#[inline(always)]
fn reduce_max_u8x16(self, a: u8x16<Self>) -> u8 {
let reduced: [u8; 8usize] = [
u8::max(a[0usize], a[1usize]),
u8::max(a[2usize], a[3usize]),
u8::max(a[4usize], a[5usize]),
u8::max(a[6usize], a[7usize]),
u8::max(a[8usize], a[9usize]),
u8::max(a[10usize], a[11usize]),
u8::max(a[12usize], a[13usize]),
u8::max(a[14usize], a[15usize]),
];
let reduced: [u8; 4usize] = [
u8::max(reduced[0usize], reduced[1usize]),
u8::max(reduced[2usize], reduced[3usize]),
u8::max(reduced[4usize], reduced[5usize]),
u8::max(reduced[6usize], reduced[7usize]),
];
let reduced: [u8; 2usize] = [
u8::max(reduced[0usize], reduced[1usize]),
u8::max(reduced[2usize], reduced[3usize]),
];
let reduced: [u8; 1usize] = [u8::max(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn reduce_min_u8x16(self, a: u8x16<Self>) -> u8 {
let reduced: [u8; 8usize] = [
u8::min(a[0usize], a[1usize]),
u8::min(a[2usize], a[3usize]),
u8::min(a[4usize], a[5usize]),
u8::min(a[6usize], a[7usize]),
u8::min(a[8usize], a[9usize]),
u8::min(a[10usize], a[11usize]),
u8::min(a[12usize], a[13usize]),
u8::min(a[14usize], a[15usize]),
];
let reduced: [u8; 4usize] = [
u8::min(reduced[0usize], reduced[1usize]),
u8::min(reduced[2usize], reduced[3usize]),
u8::min(reduced[4usize], reduced[5usize]),
u8::min(reduced[6usize], reduced[7usize]),
];
let reduced: [u8; 2usize] = [
u8::min(reduced[0usize], reduced[1usize]),
u8::min(reduced[2usize], reduced[3usize]),
];
let reduced: [u8; 1usize] = [u8::min(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn max_u8x16(self, a: u8x16<Self>, b: u8x16<Self>) -> u8x16<Self> {
[
u8::max(a[0usize], b[0usize]),
Expand Down Expand Up @@ -2717,6 +2853,36 @@ impl Simd for Fallback {
.simd_into(self)
}
#[inline(always)]
fn reduce_max_i16x8(self, a: i16x8<Self>) -> i16 {
let reduced: [i16; 4usize] = [
i16::max(a[0usize], a[1usize]),
i16::max(a[2usize], a[3usize]),
i16::max(a[4usize], a[5usize]),
i16::max(a[6usize], a[7usize]),
];
let reduced: [i16; 2usize] = [
i16::max(reduced[0usize], reduced[1usize]),
i16::max(reduced[2usize], reduced[3usize]),
];
let reduced: [i16; 1usize] = [i16::max(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn reduce_min_i16x8(self, a: i16x8<Self>) -> i16 {
let reduced: [i16; 4usize] = [
i16::min(a[0usize], a[1usize]),
i16::min(a[2usize], a[3usize]),
i16::min(a[4usize], a[5usize]),
i16::min(a[6usize], a[7usize]),
];
let reduced: [i16; 2usize] = [
i16::min(reduced[0usize], reduced[1usize]),
i16::min(reduced[2usize], reduced[3usize]),
];
let reduced: [i16; 1usize] = [i16::min(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn max_i16x8(self, a: i16x8<Self>, b: i16x8<Self>) -> i16x8<Self> {
[
i16::max(a[0usize], b[0usize]),
Expand Down Expand Up @@ -3254,6 +3420,36 @@ impl Simd for Fallback {
.simd_into(self)
}
#[inline(always)]
fn reduce_max_u16x8(self, a: u16x8<Self>) -> u16 {
let reduced: [u16; 4usize] = [
u16::max(a[0usize], a[1usize]),
u16::max(a[2usize], a[3usize]),
u16::max(a[4usize], a[5usize]),
u16::max(a[6usize], a[7usize]),
];
let reduced: [u16; 2usize] = [
u16::max(reduced[0usize], reduced[1usize]),
u16::max(reduced[2usize], reduced[3usize]),
];
let reduced: [u16; 1usize] = [u16::max(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn reduce_min_u16x8(self, a: u16x8<Self>) -> u16 {
let reduced: [u16; 4usize] = [
u16::min(a[0usize], a[1usize]),
u16::min(a[2usize], a[3usize]),
u16::min(a[4usize], a[5usize]),
u16::min(a[6usize], a[7usize]),
];
let reduced: [u16; 2usize] = [
u16::min(reduced[0usize], reduced[1usize]),
u16::min(reduced[2usize], reduced[3usize]),
];
let reduced: [u16; 1usize] = [u16::min(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn max_u16x8(self, a: u16x8<Self>, b: u16x8<Self>) -> u16x8<Self> {
[
u16::max(a[0usize], b[0usize]),
Expand Down Expand Up @@ -3951,6 +4147,24 @@ impl Simd for Fallback {
.simd_into(self)
}
#[inline(always)]
fn reduce_max_i32x4(self, a: i32x4<Self>) -> i32 {
let reduced: [i32; 2usize] = [
i32::max(a[0usize], a[1usize]),
i32::max(a[2usize], a[3usize]),
];
let reduced: [i32; 1usize] = [i32::max(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn reduce_min_i32x4(self, a: i32x4<Self>) -> i32 {
let reduced: [i32; 2usize] = [
i32::min(a[0usize], a[1usize]),
i32::min(a[2usize], a[3usize]),
];
let reduced: [i32; 1usize] = [i32::min(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn max_i32x4(self, a: i32x4<Self>, b: i32x4<Self>) -> i32x4<Self> {
[
i32::max(a[0usize], b[0usize]),
Expand Down Expand Up @@ -4303,6 +4517,24 @@ impl Simd for Fallback {
.simd_into(self)
}
#[inline(always)]
fn reduce_max_u32x4(self, a: u32x4<Self>) -> u32 {
let reduced: [u32; 2usize] = [
u32::max(a[0usize], a[1usize]),
u32::max(a[2usize], a[3usize]),
];
let reduced: [u32; 1usize] = [u32::max(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn reduce_min_u32x4(self, a: u32x4<Self>) -> u32 {
let reduced: [u32; 2usize] = [
u32::min(a[0usize], a[1usize]),
u32::min(a[2usize], a[3usize]),
];
let reduced: [u32; 1usize] = [u32::min(reduced[0usize], reduced[1usize])];
reduced[0]
}
#[inline(always)]
fn max_u32x4(self, a: u32x4<Self>, b: u32x4<Self>) -> u32x4<Self> {
[
u32::max(a[0usize], b[0usize]),
Expand Down Expand Up @@ -4724,6 +4956,26 @@ impl Simd for Fallback {
.simd_into(self)
}
#[inline(always)]
fn reduce_max_f64x2(self, a: f64x2<Self>) -> f64 {
let reduced: [f64; 1usize] = [f64::max(a[0usize], a[1usize])];
reduced[0]
}
#[inline(always)]
fn reduce_min_f64x2(self, a: f64x2<Self>) -> f64 {
let reduced: [f64; 1usize] = [f64::min(a[0usize], a[1usize])];
reduced[0]
}
#[inline(always)]
fn reduce_max_precise_f64x2(self, a: f64x2<Self>) -> f64 {
let reduced: [f64; 1usize] = [f64::max(a[0usize], a[1usize])];
reduced[0]
}
#[inline(always)]
fn reduce_min_precise_f64x2(self, a: f64x2<Self>) -> f64 {
let reduced: [f64; 1usize] = [f64::min(a[0usize], a[1usize])];
reduced[0]
}
#[inline(always)]
fn max_f64x2(self, a: f64x2<Self>, b: f64x2<Self>) -> f64x2<Self> {
[
f64::max(a[0usize], b[0usize]),
Expand Down Expand Up @@ -5052,6 +5304,16 @@ impl Simd for Fallback {
.simd_into(self)
}
#[inline(always)]
fn reduce_max_i64x2(self, a: i64x2<Self>) -> i64 {
let reduced: [i64; 1usize] = [i64::max(a[0usize], a[1usize])];
reduced[0]
}
#[inline(always)]
fn reduce_min_i64x2(self, a: i64x2<Self>) -> i64 {
let reduced: [i64; 1usize] = [i64::min(a[0usize], a[1usize])];
reduced[0]
}
#[inline(always)]
fn max_i64x2(self, a: i64x2<Self>, b: i64x2<Self>) -> i64x2<Self> {
[
i64::max(a[0usize], b[0usize]),
Expand Down Expand Up @@ -5319,6 +5581,16 @@ impl Simd for Fallback {
.simd_into(self)
}
#[inline(always)]
fn reduce_max_u64x2(self, a: u64x2<Self>) -> u64 {
let reduced: [u64; 1usize] = [u64::max(a[0usize], a[1usize])];
reduced[0]
}
#[inline(always)]
fn reduce_min_u64x2(self, a: u64x2<Self>) -> u64 {
let reduced: [u64; 1usize] = [u64::min(a[0usize], a[1usize])];
reduced[0]
}
#[inline(always)]
fn max_u64x2(self, a: u64x2<Self>, b: u64x2<Self>) -> u64x2<Self> {
[
u64::max(a[0usize], b[0usize]),
Expand Down
Loading
Loading