compiler_builtins/float/
sub.rs

1use crate::float::Float;
2
3intrinsics! {
4    #[arm_aeabi_alias = __aeabi_fsub]
5    pub extern "C" fn __subsf3(a: f32, b: f32) -> f32 {
6        crate::float::add::__addsf3(a, f32::from_bits(b.to_bits() ^ f32::SIGN_MASK))
7    }
8
9    #[arm_aeabi_alias = __aeabi_dsub]
10    pub extern "C" fn __subdf3(a: f64, b: f64) -> f64 {
11        crate::float::add::__adddf3(a, f64::from_bits(b.to_bits() ^ f64::SIGN_MASK))
12    }
13
14    #[ppc_alias = __subkf3]
15    #[cfg(f128_enabled)]
16    pub extern "C" fn __subtf3(a: f128, b: f128) -> f128 {
17        #[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))]
18        use crate::float::add::__addkf3 as __addtf3;
19        #[cfg(not(any(target_arch = "powerpc", target_arch = "powerpc64")))]
20        use crate::float::add::__addtf3;
21
22        __addtf3(a, f128::from_bits(b.to_bits() ^ f128::SIGN_MASK))
23    }
24}