Add vec_mfvscr

Author: lu-zero

crates/core_arch/src/powerpc/altivec.rs

@@ -318,6 +318,9 @@ extern "C" {
     fn vupkhsh(a: vector_signed_short) -> vector_signed_int;
     #[link_name = "llvm.ppc.altivec.vupklsh"]
     fn vupklsh(a: vector_signed_short) -> vector_signed_int;
+
+    #[link_name = "llvm.ppc.altivec.mfvscr"]
+    fn mfvscr() -> vector_unsigned_short;
 }
 
 macro_rules! s_t_l {
@@ -2737,6 +2740,14 @@ where
     a.vec_max(b)
 }
 
+/// Move From Vector Status and Control Register.
+#[inline]
+#[target_feature(enable = "altivec")]
+#[cfg_attr(test, assert_instr(mfvscr))]
+pub unsafe fn vec_mfvscr() -> vector_unsigned_short {
+    mfvscr()
+}
+
 /// Vector add.
 #[inline]
 #[target_feature(enable = "altivec")]