Constify imm8 argument of aeskeygenassist

Author: ruuda

coresimd/src/x86/x86_64/aes.rs

@@ -67,7 +67,10 @@ pub unsafe fn _mm_aesimc_si128(a: __m128i) -> __m128i {
 #[target_feature(enable = "aes")]
 #[cfg_attr(test, assert_instr(aeskeygenassist))]
 pub unsafe fn _mm_aeskeygenassist_si128(a: __m128i, imm8: u8) -> __m128i {
-    aeskeygenassist(a, imm8)
+    macro_rules! call {
+        ($imm8:expr) => (aeskeygenassist(a, $imm8))
+    }
+    constify_imm8!(imm8, call)
 }
 
 #[cfg(test)]