Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 88 insertions, 0 deletions

diff --git a/library/stdarch/crates/core_arch/src/arm/v7.rs b/library/stdarch/crates/core_arch/src/arm/v7.rs
new file mode 100644
index 000000000..e7507f9b9
--- /dev/null
+++ b/library/stdarch/crates/core_arch/src/arm/v7.rs
@@ -0,0 +1,88 @@
+//! ARMv7 intrinsics.
+//!
+//! The reference is [ARMv7-M Architecture Reference Manual (Issue
+//! E.b)][armv7m].
+//!
+//! [armv7m]:
+//! http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0403e.
+//! b/index.html
+
+pub use super::v6::*;
+
+#[cfg(test)]
+use stdarch_test::assert_instr;
+
+/// Count Leading Zeros.
+#[inline]
+#[cfg_attr(target_arch = "arm", target_feature(enable = "v7"))]
+#[cfg_attr(all(test, target_arch = "aarch64"), assert_instr(clz))]
+// FIXME: https://github.com/rust-lang/stdarch/issues/382
+// #[cfg_attr(all(test, target_arch = "arm"), assert_instr(clz))]
+pub unsafe fn _clz_u8(x: u8) -> u8 {
+    x.leading_zeros() as u8
+}
+
+/// Count Leading Zeros.
+#[inline]
+#[cfg_attr(target_arch = "arm", target_feature(enable = "v7"))]
+#[cfg_attr(all(test, target_arch = "aarch64"), assert_instr(clz))]
+// FIXME: https://github.com/rust-lang/stdarch/issues/382
+// #[cfg_attr(all(test, target_arch = "arm"), assert_instr(clz))]
+pub unsafe fn _clz_u16(x: u16) -> u16 {
+    x.leading_zeros() as u16
+}
+
+/// Count Leading Zeros.
+#[inline]
+#[cfg_attr(target_arch = "arm", target_feature(enable = "v7"))]
+#[cfg_attr(all(test, target_arch = "aarch64"), assert_instr(clz))]
+// FIXME: https://github.com/rust-lang/stdarch/issues/382
+// #[cfg_attr(all(test, target_arch = "arm"), assert_instr(clz))]
+pub unsafe fn _clz_u32(x: u32) -> u32 {
+    x.leading_zeros() as u32
+}
+
+/// Reverse the bit order.
+#[inline]
+#[cfg_attr(target_arch = "arm", target_feature(enable = "v7"))]
+#[cfg_attr(test, assert_instr(rbit))]
+pub unsafe fn _rbit_u32(x: u32) -> u32 {
+    crate::intrinsics::bitreverse(x)
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::core_arch::arm::v7;
+
+    #[test]
+    fn _clz_u8() {
+        unsafe {
+            assert_eq!(v7::_clz_u8(0b0000_1010u8), 4u8);
+        }
+    }
+
+    #[test]
+    fn _clz_u16() {
+        unsafe {
+            assert_eq!(v7::_clz_u16(0b0000_1010u16), 12u16);
+        }
+    }
+
+    #[test]
+    fn _clz_u32() {
+        unsafe {
+            assert_eq!(v7::_clz_u32(0b0000_1010u32), 28u32);
+        }
+    }
+
+    #[test]
+    #[cfg(dont_compile_me)] // FIXME need to add `v7` upstream in rustc
+    fn _rbit_u32() {
+        unsafe {
+            assert_eq!(
+                v7::_rbit_u32(0b0000_1010u32),
+                0b0101_0000_0000_0000_0000_0000_0000_0000u32
+            );
+        }
+    }
+}