Skip to content

tests/math: deepen core and inverse trig edges #126

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
arduano merged 1 commit into from
Mar 23, 2026
Merged

tests/math: deepen core and inverse trig edges #126

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
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
300 changes: 300 additions & 0 deletions src/tests/simd_math_targeted_edges/core.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -180,6 +180,44 @@ fn run_f32_trig_large_and_mixed_lanes<S: Simd>() {
);
}

fn run_f32_trig_fast_range_boundaries<S: Simd>() {
let edge = 8192.0f32;
let inputs = vec![
f32::from_bits(edge.to_bits().saturating_sub(2)),
f32::from_bits(edge.to_bits().saturating_sub(1)),
edge,
f32::from_bits(edge.to_bits().saturating_add(1)),
f32::from_bits(edge.to_bits().saturating_add(2)),
-f32::from_bits(edge.to_bits().saturating_sub(2)),
-f32::from_bits(edge.to_bits().saturating_sub(1)),
-edge,
-f32::from_bits(edge.to_bits().saturating_add(1)),
-f32::from_bits(edge.to_bits().saturating_add(2)),
];

check_targeted_unary_f32::<S>(
"sin_u35",
&inputs,
contracts::SIN_U35_F32_MAX_ULP,
|v| v.sin_u35(),
f32::sin,
);
check_targeted_unary_f32::<S>(
"cos_u35",
&inputs,
contracts::COS_U35_F32_MAX_ULP,
|v| v.cos_u35(),
f32::cos,
);
check_targeted_unary_f32::<S>(
"tan_u35",
&inputs,
contracts::TAN_U35_F32_MAX_ULP,
|v| v.tan_u35(),
f32::tan,
);
}

fn run_f32_trig_symmetry_identities<S: Simd>() {
let inputs = [
-3.0f32,
Expand Down Expand Up @@ -252,11 +290,123 @@ simd_math_targeted_all_backends!(
f32_trig_large_and_mixed_lanes,
run_f32_trig_large_and_mixed_lanes
);
simd_math_targeted_all_backends!(
f32_trig_fast_range_boundaries,
run_f32_trig_fast_range_boundaries
);
simd_math_targeted_all_backends!(
f32_trig_symmetry_identities,
run_f32_trig_symmetry_identities
);

fn run_f32_log_exp_boundary_lanes<S: Simd>() {
let mut inputs_log = vec![
f32::from_bits(1),
f32::MIN_POSITIVE,
0.5,
std::f32::consts::FRAC_1_SQRT_2,
1.0,
2.0,
128.0,
f32::INFINITY,
f32::NAN,
-1.0,
0.0,
-0.0,
];

for &scale in &[0.5f32, 1.0, 2.0, 8.0, 128.0] {
let pivot = std::f32::consts::FRAC_1_SQRT_2 * scale;
inputs_log.push(f32::from_bits(pivot.to_bits().saturating_sub(1)));
inputs_log.push(pivot);
inputs_log.push(f32::from_bits(pivot.to_bits().saturating_add(1)));
}

check_targeted_unary_f32::<S>(
"log2_u35",
&inputs_log,
contracts::LOG2_U35_F32_MAX_ULP,
|v| v.log2_u35(),
f32::log2,
);
check_targeted_unary_f32::<S>(
"ln_u35",
&inputs_log,
contracts::LN_U35_F32_MAX_ULP,
|v| v.ln_u35(),
f32::ln,
);

let mut inputs_exp = vec![
-126.0f32,
-125.5,
-10.0,
-1.0,
-0.0,
0.0,
1.0,
10.0,
126.0,
127.0,
127.25,
f32::INFINITY,
f32::NEG_INFINITY,
f32::NAN,
];

for k in -4..=4 {
let center = k as f32;
inputs_exp.push(center - 1.0 / 1024.0);
inputs_exp.push(center);
inputs_exp.push(center + 1.0 / 1024.0);
}

for &center in &[-126.0f32, -125.5, -1.0, -0.5, 0.0, 0.5, 1.0, 126.0, 127.0] {
inputs_exp.push(f32::from_bits(center.to_bits().saturating_sub(1)));
inputs_exp.push(center);
inputs_exp.push(f32::from_bits(center.to_bits().saturating_add(1)));
}

check_targeted_unary_f32::<S>(
"exp2_u35",
&inputs_exp,
contracts::EXP2_U35_F32_MAX_ULP,
|v| v.exp2_u35(),
f32::exp2,
);

let mut inputs_exp_e = vec![
-104.0f32,
-103.98,
-1.0,
-0.0,
0.0,
1.0,
88.0,
88.7,
89.0,
f32::INFINITY,
f32::NEG_INFINITY,
f32::NAN,
];

for &center in &[-104.0f32, -103.97, -1.0, 0.0, 1.0, 88.5, 88.7] {
inputs_exp_e.push(f32::from_bits(center.to_bits().saturating_sub(1)));
inputs_exp_e.push(center);
inputs_exp_e.push(f32::from_bits(center.to_bits().saturating_add(1)));
}

check_targeted_unary_f32::<S>(
"exp_u35",
&inputs_exp_e,
contracts::EXP_U35_F32_MAX_ULP,
|v| v.exp_u35(),
f32::exp,
);
}

simd_math_targeted_all_backends!(f32_log_exp_boundary_lanes, run_f32_log_exp_boundary_lanes);

fn run_f64_log_exp_boundary_lanes<S: Simd>() {
let mut inputs_log = vec![
f64::from_bits(1),
Expand Down Expand Up @@ -343,6 +493,42 @@ fn run_f64_log_exp_boundary_lanes<S: Simd>() {
);
}

fn run_f64_exp_fast_mask_boundaries<S: Simd>() {
let mut inputs_exp2 = vec![f64::NEG_INFINITY, f64::INFINITY, f64::NAN];
for &center in &[-1022.0f64, 1023.0] {
inputs_exp2.push(f64::from_bits(center.to_bits() - 2));
inputs_exp2.push(f64::from_bits(center.to_bits() - 1));
inputs_exp2.push(center);
inputs_exp2.push(f64::from_bits(center.to_bits() + 1));
inputs_exp2.push(f64::from_bits(center.to_bits() + 2));
}

check_targeted_unary_f64::<S>(
"exp2_u35 fast-mask boundary",
&inputs_exp2,
contracts::EXP2_U35_F64_MAX_ULP,
|v| v.exp2_u35(),
f64::exp2,
);

let mut inputs_exp = vec![f64::NEG_INFINITY, f64::INFINITY, f64::NAN];
for &center in &[-708.0f64, 709.0] {
inputs_exp.push(f64::from_bits(center.to_bits() - 2));
inputs_exp.push(f64::from_bits(center.to_bits() - 1));
inputs_exp.push(center);
inputs_exp.push(f64::from_bits(center.to_bits() + 1));
inputs_exp.push(f64::from_bits(center.to_bits() + 2));
}

check_targeted_unary_f64::<S>(
"exp_u35 fast-mask boundary",
&inputs_exp,
contracts::EXP_U35_F64_MAX_ULP,
|v| v.exp_u35(),
f64::exp,
);
}

fn run_f64_trig_pi_boundaries<S: Simd>() {
let mut inputs = vec![
-0.0,
Expand Down Expand Up @@ -402,9 +588,123 @@ fn run_f64_tan_pole_neighborhoods<S: Simd>() {
}

simd_math_targeted_all_backends!(f64_log_exp_boundary_lanes, run_f64_log_exp_boundary_lanes);
simd_math_targeted_all_backends!(
f64_exp_fast_mask_boundaries,
run_f64_exp_fast_mask_boundaries
);
simd_math_targeted_all_backends!(f64_trig_pi_boundaries, run_f64_trig_pi_boundaries);
simd_math_targeted_all_backends!(f64_tan_pole_neighborhoods, run_f64_tan_pole_neighborhoods);

fn run_f64_trig_large_and_mixed_lanes<S: Simd>() {
let inputs = vec![
0.25,
-0.5,
123.456_789,
-2048.0,
8192.0,
-8192.0,
1.0e6,
-1.0e6,
f64::from_bits(1),
-f64::from_bits(1),
f64::NAN,
f64::INFINITY,
f64::NEG_INFINITY,
std::f64::consts::PI * 0.5 - 1.0e-12,
std::f64::consts::PI * 0.5 + 1.0e-12,
-std::f64::consts::PI * 0.5 + 1.0e-12,
];

check_targeted_unary_f64::<S>(
"sin_u35",
&inputs,
contracts::SIN_U35_F64_MAX_ULP,
|v| v.sin_u35(),
f64::sin,
);
check_targeted_unary_f64::<S>(
"cos_u35",
&inputs,
contracts::COS_U35_F64_MAX_ULP,
|v| v.cos_u35(),
f64::cos,
);
check_targeted_unary_f64::<S>(
"tan_u35",
&inputs,
contracts::TAN_U35_F64_MAX_ULP,
|v| v.tan_u35(),
f64::tan,
);
}

fn run_f64_trig_symmetry_identities<S: Simd>() {
let inputs = [
-3.0f64,
-1.0,
-0.5,
-0.0,
0.0,
0.5,
1.0,
3.0,
std::f64::consts::FRAC_PI_3,
-std::f64::consts::FRAC_PI_3,
];

for chunk in inputs.chunks(S::Vf64::WIDTH) {
let x = S::Vf64::load_from_slice(chunk);
let sx = x.sin_u35();
let cx = x.cos_u35();
let tx = x.tan_u35();

let neg_x = -x;
let sneg = neg_x.sin_u35();
let cneg = neg_x.cos_u35();
let tneg = neg_x.tan_u35();

for lane in 0..chunk.len() {
if chunk[lane] == 0.0 {
continue;
}

assert_f64_contract(
"sin parity",
chunk[lane],
sneg[lane],
-sx[lane],
contracts::SIN_U35_F64_MAX_ULP,
)
.unwrap_or_else(|e| panic!("{e}"));
assert_f64_contract(
"cos parity",
chunk[lane],
cneg[lane],
cx[lane],
contracts::COS_U35_F64_MAX_ULP,
)
.unwrap_or_else(|e| panic!("{e}"));
assert_f64_contract(
"tan parity",
chunk[lane],
tneg[lane],
-tx[lane],
contracts::TAN_U35_F64_MAX_ULP,
)
.unwrap_or_else(|e| panic!("{e}"));
}
}
}

simd_math_targeted_all_backends!(
f64_trig_large_and_mixed_lanes,
run_f64_trig_large_and_mixed_lanes
);
simd_math_targeted_all_backends!(
f64_trig_symmetry_identities,
run_f64_trig_symmetry_identities
);

#[cfg(any(target_arch = "x86_64", target_arch = "x86"))]
#[test]
fn f32_log2_u35_mixed_exception_lanes_avx2() {
Expand Down
Loading
Loading