1.27.0[−][src]Function core::arch::x86::_mm_cmpestri
pub unsafe fn _mm_cmpestri(
a: __m128i,
la: i32,
b: __m128i,
lb: i32,
imm8: i32
) -> i32
This is supported on x86 and target feature
sse4.2
only.Compares packed strings a
and b
with lengths la
and lb
using the
control in imm8
and return the generated index. Similar to
_mm_cmpistri
with the exception that _mm_cmpistri
implicitly
determines the length of a
and b
.
Control modes
The control specified by imm8
may be one or more of the following.
Data size and signedness
Comparison options
Result polarity
Bit returned
Examples
#[cfg(target_arch = "x86")] use std::arch::x86::*; #[cfg(target_arch = "x86_64")] use std::arch::x86_64::*; // The string we want to find a substring in let haystack = b"Split \r\n\t line "; // The string we want to search for with some // extra bytes we do not want to search for. let needle = b"\r\n\t ignore this "; let a = _mm_loadu_si128(needle.as_ptr() as *const _); let b = _mm_loadu_si128(haystack.as_ptr() as *const _); // Note: We explicitly specify we only want to search `b` for the // first 3 characters of a. let idx = _mm_cmpestri(a, 3, b, 15, _SIDD_CMP_EQUAL_ORDERED); assert_eq!(idx, 6);Run