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    //! Application Program Status Register

    /// Application Program Status Register
    #[derive(Clone, Copy, Debug)]
    pub struct Apsr {
        bits: u32,
    }

    impl Apsr {
        /// Returns the contents of the register as raw bits
        pub fn bits(&self) -> u32 {
            self.bits
        }

        /// DSP overflow and saturation flag
        pub fn q(&self) -> bool {
            self.bits & (1 << 27) == (1 << 27)
        }

        /// Overflow flag
        pub fn v(&self) -> bool {
            self.bits & (1 << 28) == (1 << 28)
        }

        /// Carry or borrow flag
        pub fn c(&self) -> bool {
            self.bits & (1 << 29) == (1 << 29)
        }

        /// Zero flag
        pub fn z(&self) -> bool {
            self.bits & (1 << 30) == (1 << 30)
        }

        /// Negative flag
        pub fn n(&self) -> bool {
            self.bits & (1 << 31) == (1 << 31)
        }
    }

    /// Reads the CPU register
    ///
    /// **NOTE** This function is available if `cortex-m` is built with the `"inline-asm"` feature.
    #[inline]
    pub fn read() -> Apsr {
        match () {
            #[cfg(cortex_m)]
            () => {
                let r: u32;
                unsafe {
                    asm!("mrs $0, APSR" : "=r"(r) ::: "volatile");
                }
                Apsr { bits: r }
            }

            #[cfg(not(cortex_m))]
            () => unimplemented!(),
        }
    }

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