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|
#![cfg_attr(f128_enabled, feature(f128))]
use builtins_test::float_bench;
use compiler_builtins::float::cmp::{self, CmpResult};
use criterion::{Criterion, criterion_main};
/// `gt` symbols are allowed to return differing results, they just get compared
/// to 0.
fn gt_res_eq(mut a: CmpResult, mut b: CmpResult) -> bool {
// FIXME: Our CmpResult used to be `i32`, but GCC/LLVM expect `isize`. on 64-bit platforms,
// this means the top half of the word may be garbage if built with an old version of
// `compiler-builtins`, so add a hack around this.
//
// This can be removed once a version of `compiler-builtins` with the return type fix makes
// it upstream.
if size_of::<CmpResult>() == 8 {
a = a as i32 as CmpResult;
b = b as i32 as CmpResult;
}
let a_lt_0 = a <= 0;
let b_lt_0 = b <= 0;
(a_lt_0 && b_lt_0) || (!a_lt_0 && !b_lt_0)
}
float_bench! {
name: cmp_f32_gt,
sig: (a: f32, b: f32) -> CmpResult,
crate_fn: cmp::__gtsf2,
sys_fn: __gtsf2,
sys_available: all(),
output_eq: gt_res_eq,
asm: [
#[cfg(target_arch = "x86_64")] {
let ret: CmpResult;
asm!(
"xor {ret:e}, {ret:e}",
"ucomiss {a}, {b}",
"seta {ret:l}",
a = in(xmm_reg) a,
b = in(xmm_reg) b,
ret = out(reg) ret,
options(nomem, nostack, pure)
);
ret
};
#[cfg(target_arch = "aarch64")] {
let ret: CmpResult;
asm!(
"fcmp {a:s}, {b:s}",
"cset {ret:w}, gt",
a = in(vreg) a,
b = in(vreg) b,
ret = out(reg) ret,
options(nomem,nostack),
);
ret
};
],
}
float_bench! {
name: cmp_f32_unord,
sig: (a: f32, b: f32) -> CmpResult,
crate_fn: cmp::__unordsf2,
sys_fn: __unordsf2,
sys_available: all(),
asm: [
#[cfg(target_arch = "x86_64")] {
let ret: CmpResult;
asm!(
"xor {ret:e}, {ret:e}",
"ucomiss {a}, {b}",
"setp {ret:l}",
a = in(xmm_reg) a,
b = in(xmm_reg) b,
ret = out(reg) ret,
options(nomem, nostack, pure)
);
ret
};
#[cfg(target_arch = "aarch64")] {
let ret: CmpResult;
asm!(
"fcmp {a:s}, {b:s}",
"cset {ret:w}, vs",
a = in(vreg) a,
b = in(vreg) b,
ret = out(reg) ret,
options(nomem, nostack, pure)
);
ret
};
],
}
float_bench! {
name: cmp_f64_gt,
sig: (a: f64, b: f64) -> CmpResult,
crate_fn: cmp::__gtdf2,
sys_fn: __gtdf2,
sys_available: all(),
output_eq: gt_res_eq,
asm: [
#[cfg(target_arch = "x86_64")] {
let ret: CmpResult;
asm!(
"xor {ret:e}, {ret:e}",
"ucomisd {a}, {b}",
"seta {ret:l}",
a = in(xmm_reg) a,
b = in(xmm_reg) b,
ret = out(reg) ret,
options(nomem, nostack, pure)
);
ret
};
#[cfg(target_arch = "aarch64")] {
let ret: CmpResult;
asm!(
"fcmp {a:d}, {b:d}",
"cset {ret:w}, gt",
a = in(vreg) a,
b = in(vreg) b,
ret = out(reg) ret,
options(nomem, nostack, pure)
);
ret
};
],
}
float_bench! {
name: cmp_f64_unord,
sig: (a: f64, b: f64) -> CmpResult,
crate_fn: cmp::__unorddf2,
sys_fn: __unorddf2,
sys_available: all(),
asm: [
#[cfg(target_arch = "x86_64")] {
let ret: CmpResult;
asm!(
"xor {ret:e}, {ret:e}",
"ucomisd {a}, {b}",
"setp {ret:l}",
a = in(xmm_reg) a,
b = in(xmm_reg) b,
ret = out(reg) ret,
options(nomem, nostack, pure)
);
ret
};
#[cfg(target_arch = "aarch64")] {
let ret: CmpResult;
asm!(
"fcmp {a:d}, {b:d}",
"cset {ret:w}, vs",
a = in(vreg) a,
b = in(vreg) b,
ret = out(reg) ret,
options(nomem, nostack, pure)
);
ret
};
],
}
float_bench! {
name: cmp_f128_gt,
sig: (a: f128, b: f128) -> CmpResult,
crate_fn: cmp::__gttf2,
crate_fn_ppc: cmp::__gtkf2,
sys_fn: __gttf2,
sys_fn_ppc: __gtkf2,
sys_available: not(feature = "no-sys-f128"),
output_eq: gt_res_eq,
asm: []
}
float_bench! {
name: cmp_f128_unord,
sig: (a: f128, b: f128) -> CmpResult,
crate_fn: cmp::__unordtf2,
crate_fn_ppc: cmp::__unordkf2,
sys_fn: __unordtf2,
sys_fn_ppc: __unordkf2,
sys_available: not(feature = "no-sys-f128"),
asm: []
}
pub fn float_cmp() {
let mut criterion = Criterion::default().configure_from_args();
cmp_f32_gt(&mut criterion);
cmp_f32_unord(&mut criterion);
cmp_f64_gt(&mut criterion);
cmp_f64_unord(&mut criterion);
#[cfg(f128_enabled)]
{
cmp_f128_gt(&mut criterion);
cmp_f128_unord(&mut criterion);
}
}
criterion_main!(float_cmp);
|
