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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.
128 lines
3.0 KiB
Rust
128 lines
3.0 KiB
Rust
#![feature(f128)]
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#![feature(f16)]
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use compiler_builtins::float::trunc;
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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: trunc_f32_f16,
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sig: (a: f32) -> f16,
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crate_fn: trunc::__truncsfhf2,
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sys_fn: __truncsfhf2,
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sys_available: not(feature = "no-sys-f16"),
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asm: [
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#[cfg(target_arch = "aarch64")] {
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// FIXME(f16_f128): remove `from_bits()` after f16 asm support (rust-lang/rust/#116909)
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let ret: u16;
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asm!(
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"fcvt {ret:h}, {a:s}",
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a = in(vreg) a,
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ret = lateout(vreg) ret,
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options(nomem, nostack, pure),
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);
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f16::from_bits(ret)
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};
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],
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}
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float_bench! {
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name: trunc_f64_f16,
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sig: (a: f64) -> f16,
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crate_fn: trunc::__truncdfhf2,
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sys_fn: __truncdfhf2,
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sys_available: not(feature = "no-sys-f128"),
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asm: [
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#[cfg(target_arch = "aarch64")] {
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// FIXME(f16_f128): remove `from_bits()` after f16 asm support (rust-lang/rust/#116909)
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let ret: u16;
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asm!(
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"fcvt {ret:h}, {a:d}",
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a = in(vreg) a,
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ret = lateout(vreg) ret,
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options(nomem, nostack, pure),
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);
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f16::from_bits(ret)
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};
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],
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}
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float_bench! {
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name: trunc_f64_f32,
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sig: (a: f64) -> f32,
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crate_fn: trunc::__truncdfsf2,
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sys_fn: __truncdfsf2,
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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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let ret: f32;
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asm!(
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"cvtsd2ss {ret}, {a}",
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a = in(xmm_reg) a,
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ret = lateout(xmm_reg) ret,
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options(nomem, nostack, pure),
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);
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ret
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};
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#[cfg(target_arch = "aarch64")] {
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let ret: f32;
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asm!(
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"fcvt {ret:s}, {a:d}",
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a = in(vreg) a,
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ret = lateout(vreg) ret,
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options(nomem, nostack, pure),
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);
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ret
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};
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],
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}
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float_bench! {
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name: trunc_f128_f16,
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sig: (a: f128) -> f16,
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crate_fn: trunc::__trunctfhf2,
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crate_fn_ppc: trunc::__trunckfhf2,
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sys_fn: __trunctfhf2,
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sys_fn_ppc: __trunckfhf2,
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sys_available: not(feature = "no-sys-f16-f128-convert"),
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asm: [],
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}
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float_bench! {
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name: trunc_f128_f32,
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sig: (a: f128) -> f32,
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crate_fn: trunc::__trunctfsf2,
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crate_fn_ppc: trunc::__trunckfsf2,
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sys_fn: __trunctfsf2,
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sys_fn_ppc: __trunckfsf2,
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sys_available: not(feature = "no-sys-f128"),
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asm: [],
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}
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float_bench! {
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name: trunc_f128_f64,
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sig: (a: f128) -> f64,
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crate_fn: trunc::__trunctfdf2,
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crate_fn_ppc: trunc::__trunckfdf2,
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sys_fn: __trunctfdf2,
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sys_fn_ppc: __trunckfdf2,
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sys_available: not(feature = "no-sys-f128"),
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asm: [],
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}
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criterion_group!(
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float_trunc,
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trunc_f32_f16,
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trunc_f64_f16,
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trunc_f64_f32,
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trunc_f128_f16,
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trunc_f128_f32,
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trunc_f128_f64,
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);
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criterion_main!(float_trunc);
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