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mul128

sqrt.mul128

inline fn mul128(a: u128, b: u128) u128

File

lib/compiler_rt/sqrt.zig:532

Code

inline fn mul128(a: u128, b: u128) u128 {
    const ahi = a >> 64;
    const alo = a & 0xFFFF_FFFF_FFFF_FFFF;
    const bhi = b >> 64;
    const blo = b & 0xFFFF_FFFF_FFFF_FFFF;
    return ahi * bhi + (ahi * blo >> 64) + (alo * bhi >> 64);
}