23 lines
608 B
Rust
23 lines
608 B
Rust
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#[cfg(target_arch = "x86_64")]
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mod x86_64 {
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use core::arch::x86_64 as arch;
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fn adc(c_in: u8, a: u64, b: u64) -> (u8, u64) {
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let mut sum = 0;
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// SAFETY: There are no safety requirements for calling `_addcarry_u64`.
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// It's just unsafe for API consistency with other intrinsics.
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let c_out = unsafe { arch::_addcarry_u64(c_in, a, b, &mut sum) };
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(c_out, sum)
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}
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pub fn main() {
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assert_eq!(adc(1, 1, 1), (0, 3));
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assert_eq!(adc(3, u64::MAX, u64::MAX), (2, 1));
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}
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}
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fn main() {
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#[cfg(target_arch = "x86_64")]
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x86_64::main();
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}
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