     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    58
    59
    60

    //! `i686`'s Streaming SIMD Extensions 4.1 (SSE4.1)

    use coresimd::simd_llvm::*;
    use coresimd::x86::*;
    use mem;

    #[cfg(test)]
    use stdsimd_test::assert_instr;

    /// Extract an 64-bit integer from `a` selected with `imm8`
    ///
    /// [Intel's documentation](https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_mm_extract_epi64)
    #[inline]
    #[target_feature(enable = "sse4.1")]
    // TODO: Add test for Windows
    #[cfg_attr(test, assert_instr(pextrq, imm8 = 1))]
    #[rustc_args_required_const(1)]
    #[stable(feature = "simd_x86", since = "1.27.0")]
    pub unsafe fn _mm_extract_epi64(a: __m128i, imm8: i32) -> i64 {
        let imm8 = (imm8 & 1) as u32;
        simd_extract(a.as_i64x2(), imm8)
    }

    /// Return a copy of `a` with the 64-bit integer from `i` inserted at a
    /// location specified by `imm8`.
    ///
    /// [Intel's documentation](https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_mm_insert_epi64)
    #[inline]
    #[target_feature(enable = "sse4.1")]
    #[cfg_attr(test, assert_instr(pinsrq, imm8 = 0))]
    #[rustc_args_required_const(2)]
    #[stable(feature = "simd_x86", since = "1.27.0")]
    pub unsafe fn _mm_insert_epi64(a: __m128i, i: i64, imm8: i32) -> __m128i {
        mem::transmute(simd_insert(a.as_i64x2(), (imm8 & 1) as u32, i))
    }

    #[cfg(test)]
    mod tests {
        use coresimd::arch::x86_64::*;
        use stdsimd_test::simd_test;

        #[simd_test(enable = "sse4.1")]
        unsafe fn test_mm_extract_epi64() {
            let a = _mm_setr_epi64x(0, 1);
            let r = _mm_extract_epi64(a, 1);
            assert_eq!(r, 1);
            let r = _mm_extract_epi64(a, 3);
            assert_eq!(r, 1);
        }

        #[simd_test(enable = "sse4.1")]
        unsafe fn test_mm_insert_epi64() {
            let a = _mm_set1_epi64x(0);
            let e = _mm_setr_epi64x(0, 32);
            let r = _mm_insert_epi64(a, 32, 1);
            assert_eq_m128i(r, e);
            let r = _mm_insert_epi64(a, 32, 3);
            assert_eq_m128i(r, e);
        }
    }

# Help

## Keyboard Shortcuts

`?`
  Show this help dialog
`S`
  Focus the search field
`↑`
  Move up in search results
`↓`
  Move down in search results
`↹`
  Switch tab
`⏎`
  Go to active search result
`+`
  Expand all sections
`-`
  Collapse all sections

## Search Tricks

Prefix searches with a type followed by a colon (e.g. `fn:`) to restrict the search to a given type.

Accepted types are: `fn`, `mod`, `struct`, `enum`, `trait`, `type`, `macro`, and `const`.

Search functions by type signature (e.g. `vec -> usize` or `* -> vec`)

Search multiple things at once by splitting your query with comma (e.g. `str,u8` or `String,struct:Vec,test`)