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Fix __subsf3 and __subdf3 on x86 

Be sure to do not mix hard-float and soft-float calls.
Disassembled code show exactly this.
So replace add with an explicit call to __addsf3/__adddf3

This seems the root cause of some sporadic failures.
This commit is contained in:
Paolo Teti 2018-02-09 20:35:55 +01:00
parent 306764b091
commit 2cb290afa3
1 changed files with 4 additions and 2 deletions
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6
src/float/sub.rs
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@ -1,14 +1,16 @@
use float::Float;
use float::add::__addsf3;
use float::add::__adddf3;
intrinsics! {
#[arm_aeabi_alias = __aeabi_fsub]
pub extern "C" fn __subsf3(a: f32, b: f32) -> f32 {
a + f32::from_repr(b.repr() ^ f32::SIGN_MASK)
__addsf3(a, f32::from_repr(b.repr() ^ f32::SIGN_MASK))
}
#[arm_aeabi_alias = __aeabi_dsub]
pub extern "C" fn __subdf3(a: f64, b: f64) -> f64 {
a + f64::from_repr(b.repr() ^ f64::SIGN_MASK)
__adddf3(a, f64::from_repr(b.repr() ^ f64::SIGN_MASK))
}
#[cfg(target_arch = "arm")]