Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

1 files changed, 300 insertions, 0 deletions

diff --git a/vendor/portable-atomic/src/imp/msp430.rs b/vendor/portable-atomic/src/imp/msp430.rs
new file mode 100644
index 0000000..f6990dd
--- /dev/null
+++ b/vendor/portable-atomic/src/imp/msp430.rs
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+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
+// Atomic load/store implementation on MSP430.
+//
+// Adapted from https://github.com/pftbest/msp430-atomic.
+// Including https://github.com/pftbest/msp430-atomic/pull/4 for a compile error fix.
+// Including https://github.com/pftbest/msp430-atomic/pull/5 for a soundness bug fix.
+//
+// Operations not supported here are provided by disabling interrupts.
+// See also src/imp/interrupt/msp430.rs.
+//
+// Note: Ordering is always SeqCst.
+//
+// Refs: https://www.ti.com/lit/ug/slau208q/slau208q.pdf
+
+#[cfg(not(portable_atomic_no_asm))]
+use core::arch::asm;
+#[cfg(any(test, not(feature = "critical-section")))]
+use core::cell::UnsafeCell;
+use core::sync::atomic::Ordering;
+
+/// An atomic fence.
+///
+/// # Panics
+///
+/// Panics if `order` is [`Relaxed`](Ordering::Relaxed).
+#[inline]
+#[cfg_attr(all(debug_assertions, not(portable_atomic_no_track_caller)), track_caller)]
+pub fn fence(order: Ordering) {
+    match order {
+        Ordering::Relaxed => panic!("there is no such thing as a relaxed fence"),
+        // MSP430 is single-core and a compiler fence works as an atomic fence.
+        _ => compiler_fence(order),
+    }
+}
+
+/// A compiler memory fence.
+///
+/// # Panics
+///
+/// Panics if `order` is [`Relaxed`](Ordering::Relaxed).
+#[inline]
+#[cfg_attr(all(debug_assertions, not(portable_atomic_no_track_caller)), track_caller)]
+pub fn compiler_fence(order: Ordering) {
+    match order {
+        Ordering::Relaxed => panic!("there is no such thing as a relaxed compiler fence"),
+        _ => {}
+    }
+    // SAFETY: using an empty asm is safe.
+    unsafe {
+        // Do not use `nomem` and `readonly` because prevent preceding and subsequent memory accesses from being reordered.
+        #[cfg(not(portable_atomic_no_asm))]
+        asm!("", options(nostack, preserves_flags));
+        #[cfg(portable_atomic_no_asm)]
+        llvm_asm!("" ::: "memory" : "volatile");
+    }
+}
+
+macro_rules! atomic {
+    (load_store, $([$($generics:tt)*])? $atomic_type:ident, $value_type:ty, $asm_suffix:tt) => {
+        #[cfg(any(test, not(feature = "critical-section")))]
+        #[repr(transparent)]
+        pub(crate) struct $atomic_type $(<$($generics)*>)? {
+            v: UnsafeCell<$value_type>,
+        }
+
+        #[cfg(any(test, not(feature = "critical-section")))]
+        // Send is implicitly implemented for atomic integers, but not for atomic pointers.
+        // SAFETY: any data races are prevented by atomic operations.
+        unsafe impl $(<$($generics)*>)? Send for $atomic_type $(<$($generics)*>)? {}
+        #[cfg(any(test, not(feature = "critical-section")))]
+        // SAFETY: any data races are prevented by atomic operations.
+        unsafe impl $(<$($generics)*>)? Sync for $atomic_type $(<$($generics)*>)? {}
+
+        #[cfg(any(test, not(feature = "critical-section")))]
+        impl $(<$($generics)*>)? $atomic_type $(<$($generics)*>)? {
+            #[cfg(test)]
+            #[inline]
+            pub(crate) const fn new(v: $value_type) -> Self {
+                Self { v: UnsafeCell::new(v) }
+            }
+
+            #[cfg(test)]
+            #[inline]
+            pub(crate) fn is_lock_free() -> bool {
+                Self::is_always_lock_free()
+            }
+            #[cfg(test)]
+            #[inline]
+            pub(crate) const fn is_always_lock_free() -> bool {
+                true
+            }
+
+            #[cfg(test)]
+            #[inline]
+            pub(crate) fn get_mut(&mut self) -> &mut $value_type {
+                // SAFETY: the mutable reference guarantees unique ownership.
+                // (UnsafeCell::get_mut requires Rust 1.50)
+                unsafe { &mut *self.v.get() }
+            }
+
+            #[cfg(test)]
+            #[inline]
+            pub(crate) fn into_inner(self) -> $value_type {
+                 self.v.into_inner()
+            }
+
+            #[inline]
+            #[cfg_attr(all(debug_assertions, not(portable_atomic_no_track_caller)), track_caller)]
+            pub(crate) fn load(&self, order: Ordering) -> $value_type {
+                crate::utils::assert_load_ordering(order);
+                let src = self.v.get();
+                // SAFETY: any data races are prevented by atomic intrinsics and the raw
+                // pointer passed in is valid because we got it from a reference.
+                unsafe {
+                    let out;
+                    #[cfg(not(portable_atomic_no_asm))]
+                    asm!(
+                        concat!("mov", $asm_suffix, " @{src}, {out}"),
+                        src = in(reg) src,
+                        out = lateout(reg) out,
+                        options(nostack, preserves_flags),
+                    );
+                    #[cfg(portable_atomic_no_asm)]
+                    llvm_asm!(
+                        concat!("mov", $asm_suffix, " $1, $0")
+                        : "=r"(out) : "*m"(src) : "memory" : "volatile"
+                    );
+                    out
+                }
+            }
+
+            #[inline]
+            #[cfg_attr(all(debug_assertions, not(portable_atomic_no_track_caller)), track_caller)]
+            pub(crate) fn store(&self, val: $value_type, order: Ordering) {
+                crate::utils::assert_store_ordering(order);
+                let dst = self.v.get();
+                // SAFETY: any data races are prevented by atomic intrinsics and the raw
+                // pointer passed in is valid because we got it from a reference.
+                unsafe {
+                    #[cfg(not(portable_atomic_no_asm))]
+                    asm!(
+                        concat!("mov", $asm_suffix, " {val}, 0({dst})"),
+                        dst = in(reg) dst,
+                        val = in(reg) val,
+                        options(nostack, preserves_flags),
+                    );
+                    #[cfg(portable_atomic_no_asm)]
+                    llvm_asm!(
+                        concat!("mov", $asm_suffix, " $1, $0")
+                        :: "*m"(dst), "ir"(val) : "memory" : "volatile"
+                    );
+                }
+            }
+        }
+    };
+    ($([$($generics:tt)*])? $atomic_type:ident, $value_type:ty, $asm_suffix:tt) => {
+        atomic!(load_store, $([$($generics)*])? $atomic_type, $value_type, $asm_suffix);
+        #[cfg(any(test, not(feature = "critical-section")))]
+        impl $(<$($generics)*>)? $atomic_type $(<$($generics)*>)? {
+            #[inline]
+            pub(crate) fn add(&self, val: $value_type, _order: Ordering) {
+                let dst = self.v.get();
+                // SAFETY: any data races are prevented by atomic intrinsics and the raw
+                // pointer passed in is valid because we got it from a reference.
+                unsafe {
+                    #[cfg(not(portable_atomic_no_asm))]
+                    asm!(
+                        concat!("add", $asm_suffix, " {val}, 0({dst})"),
+                        dst = in(reg) dst,
+                        val = in(reg) val,
+                        // Do not use `preserves_flags` because ADD modifies the V, N, Z, and C bits of the status register.
+                        options(nostack),
+                    );
+                    #[cfg(portable_atomic_no_asm)]
+                    llvm_asm!(
+                        concat!("add", $asm_suffix, " $1, $0")
+                        :: "*m"(dst), "ir"(val) : "memory" : "volatile"
+                    );
+                }
+            }
+
+            #[inline]
+            pub(crate) fn sub(&self, val: $value_type, _order: Ordering) {
+                let dst = self.v.get();
+                // SAFETY: any data races are prevented by atomic intrinsics and the raw
+                // pointer passed in is valid because we got it from a reference.
+                unsafe {
+                    #[cfg(not(portable_atomic_no_asm))]
+                    asm!(
+                        concat!("sub", $asm_suffix, " {val}, 0({dst})"),
+                        dst = in(reg) dst,
+                        val = in(reg) val,
+                        // Do not use `preserves_flags` because SUB modifies the V, N, Z, and C bits of the status register.
+                        options(nostack),
+                    );
+                    #[cfg(portable_atomic_no_asm)]
+                    llvm_asm!(
+                        concat!("sub", $asm_suffix, " $1, $0")
+                        :: "*m"(dst), "ir"(val) : "memory" : "volatile"
+                    );
+                }
+            }
+
+            #[inline]
+            pub(crate) fn and(&self, val: $value_type, _order: Ordering) {
+                let dst = self.v.get();
+                // SAFETY: any data races are prevented by atomic intrinsics and the raw
+                // pointer passed in is valid because we got it from a reference.
+                unsafe {
+                    #[cfg(not(portable_atomic_no_asm))]
+                    asm!(
+                        concat!("and", $asm_suffix, " {val}, 0({dst})"),
+                        dst = in(reg) dst,
+                        val = in(reg) val,
+                        // Do not use `preserves_flags` because AND modifies the V, N, Z, and C bits of the status register.
+                        options(nostack),
+                    );
+                    #[cfg(portable_atomic_no_asm)]
+                    llvm_asm!(
+                        concat!("and", $asm_suffix, " $1, $0")
+                        :: "*m"(dst), "ir"(val) : "memory" : "volatile"
+                    );
+                }
+            }
+
+            #[inline]
+            pub(crate) fn or(&self, val: $value_type, _order: Ordering) {
+                let dst = self.v.get();
+                // SAFETY: any data races are prevented by atomic intrinsics and the raw
+                // pointer passed in is valid because we got it from a reference.
+                unsafe {
+                    #[cfg(not(portable_atomic_no_asm))]
+                    asm!(
+                        concat!("bis", $asm_suffix, " {val}, 0({dst})"),
+                        dst = in(reg) dst,
+                        val = in(reg) val,
+                        options(nostack, preserves_flags),
+                    );
+                    #[cfg(portable_atomic_no_asm)]
+                    llvm_asm!(
+                        concat!("bis", $asm_suffix, " $1, $0")
+                        :: "*m"(dst), "ir"(val) : "memory" : "volatile"
+                    );
+                }
+            }
+
+            #[inline]
+            pub(crate) fn xor(&self, val: $value_type, _order: Ordering) {
+                let dst = self.v.get();
+                // SAFETY: any data races are prevented by atomic intrinsics and the raw
+                // pointer passed in is valid because we got it from a reference.
+                unsafe {
+                    #[cfg(not(portable_atomic_no_asm))]
+                    asm!(
+                        concat!("xor", $asm_suffix, " {val}, 0({dst})"),
+                        dst = in(reg) dst,
+                        val = in(reg) val,
+                        // Do not use `preserves_flags` because XOR modifies the V, N, Z, and C bits of the status register.
+                        options(nostack),
+                    );
+                    #[cfg(portable_atomic_no_asm)]
+                    llvm_asm!(
+                        concat!("xor", $asm_suffix, " $1, $0")
+                        :: "*m"(dst), "ir"(val) : "memory" : "volatile"
+                    );
+                }
+            }
+
+            #[inline]
+            pub(crate) fn not(&self, _order: Ordering) {
+                let dst = self.v.get();
+                // SAFETY: any data races are prevented by atomic intrinsics and the raw
+                // pointer passed in is valid because we got it from a reference.
+                unsafe {
+                    #[cfg(not(portable_atomic_no_asm))]
+                    asm!(
+                        concat!("inv", $asm_suffix, " 0({dst})"),
+                        dst = in(reg) dst,
+                        // Do not use `preserves_flags` because INV modifies the V, N, Z, and C bits of the status register.
+                        options(nostack),
+                    );
+                    #[cfg(portable_atomic_no_asm)]
+                    llvm_asm!(
+                        concat!("inv", $asm_suffix, " $0")
+                        :: "*m"(dst) : "memory" : "volatile"
+                    );
+                }
+            }
+        }
+    }
+}
+
+atomic!(AtomicI8, i8, ".b");
+atomic!(AtomicU8, u8, ".b");
+atomic!(AtomicI16, i16, ".w");
+atomic!(AtomicU16, u16, ".w");
+atomic!(AtomicIsize, isize, ".w");
+atomic!(AtomicUsize, usize, ".w");
+atomic!(load_store, [T] AtomicPtr, *mut T, ".w");