     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

    //! `i386` intrinsics

    /// Reads EFLAGS.
    #[cfg(target_arch = "x86")]
    #[inline(always)]
    pub unsafe fn __readeflags() -> u32 {
        let eflags: u32;
        asm!("pushfd; popl $0" : "=r"(eflags) : : : "volatile");
        eflags
    }

    /// Reads EFLAGS.
    #[cfg(target_arch = "x86_64")]
    #[inline(always)]
    pub unsafe fn __readeflags() -> u64 {
        let eflags: u64;
        asm!("pushfq; popq $0" : "=r"(eflags) : : : "volatile");
        eflags
    }

    /// Write EFLAGS.
    #[cfg(target_arch = "x86")]
    #[inline(always)]
    pub unsafe fn __writeeflags(eflags: u32) {
        asm!("pushl $0; popfd" : : "r"(eflags) : "cc", "flags" : "volatile");
    }

    /// Write EFLAGS.
    #[cfg(target_arch = "x86_64")]
    #[inline(always)]
    pub unsafe fn __writeeflags(eflags: u64) {
        asm!("pushq $0; popfq" : : "r"(eflags) : "cc", "flags" : "volatile");
    }

    #[cfg(test)]
    mod tests {
        use coresimd::x86::*;

        #[test]
        fn test_eflags() {
            unsafe {
                // reads eflags, writes them back, reads them again,
                // and compare for equality:
                let v = __readeflags();
                __writeeflags(v);
                let u = __readeflags();
                assert_eq!(v, u);
            }
        }
    }

# 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`)