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6cd17ff4d2
This adds comparisons among the compiler-builtins function, system functions if available, and optionally handwritten assembly. These also help us identify inconsistencies between this crate and system functions, which may otherwise go unnoticed if intrinsics get lowered to inline operations rather than library calls.
71 lines
1.5 KiB
Rust
71 lines
1.5 KiB
Rust
#![feature(f128)]
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use compiler_builtins::float::div;
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use criterion::{criterion_group, criterion_main, Criterion};
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use testcrate::float_bench;
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float_bench! {
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name: div_f32,
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sig: (a: f32, b: f32) -> f32,
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crate_fn: div::__divsf3,
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sys_fn: __divsf3,
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sys_available: all(),
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asm: [
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#[cfg(target_arch = "x86_64")] {
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asm!(
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"divss {a}, {b}",
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a = inout(xmm_reg) a,
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b = in(xmm_reg) b,
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options(nomem, nostack, pure)
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);
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a
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};
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#[cfg(target_arch = "aarch64")] {
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asm!(
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"fdiv {a:s}, {a:s}, {b:s}",
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a = inout(vreg) a,
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b = in(vreg) b,
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options(nomem, nostack, pure)
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);
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a
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};
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],
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}
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float_bench! {
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name: div_f64,
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sig: (a: f64, b: f64) -> f64,
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crate_fn: div::__divdf3,
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sys_fn: __divdf3,
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sys_available: all(),
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asm: [
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#[cfg(target_arch = "x86_64")] {
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asm!(
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"divsd {a}, {b}",
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a = inout(xmm_reg) a,
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b = in(xmm_reg) b,
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options(nomem, nostack, pure)
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);
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a
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};
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#[cfg(target_arch = "aarch64")] {
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asm!(
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"fdiv {a:d}, {a:d}, {b:d}",
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a = inout(vreg) a,
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b = in(vreg) b,
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options(nomem, nostack, pure)
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);
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a
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};
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],
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}
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criterion_group!(float_div, div_f32, div_f64);
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criterion_main!(float_div);
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