core::arch::x86_64

Function _mm_cvttss_si64

1.27.0 · source 
pub unsafe fn _mm_cvttss_si64(a: __m128) -> i64
Available on x86-64 and target feature sse only.
Expand description

Converts the lowest 32 bit float in the input vector to a 64 bit integer with truncation.

The result is rounded always using truncation (round towards zero). If the result cannot be represented as a 64 bit integer the result will be 0x8000_0000_0000_0000 (i64::MIN) or an invalid operation floating point exception if unmasked (see _mm_setcsr).

This corresponds to the CVTTSS2SI instruction (with 64 bit output).

Intel’s documentation