1 files changed, 21 insertions, 0 deletions
diff --git a/riscv/insns/aes64ds.h b/riscv/insns/aes64ds.h
new file mode 100644
index 0000000..05fadca
--- /dev/null
+++ b/riscv/insns/aes64ds.h
@@ -0,0 +1,21 @@
+
+#include "aes_common.h"
+
+require_rv64;
+require_extension('K');
+
+uint64_t temp = AES_INVSHIFROWS_LO(RS1,RS2);
+
+         temp = (
+    ((uint64_t)AES_DEC_SBOX[(temp >>  0) & 0xFF] <<  0) |
+    ((uint64_t)AES_DEC_SBOX[(temp >>  8) & 0xFF] <<  8) |
+    ((uint64_t)AES_DEC_SBOX[(temp >> 16) & 0xFF] << 16) |
+    ((uint64_t)AES_DEC_SBOX[(temp >> 24) & 0xFF] << 24) |
+    ((uint64_t)AES_DEC_SBOX[(temp >> 32) & 0xFF] << 32) |
+    ((uint64_t)AES_DEC_SBOX[(temp >> 40) & 0xFF] << 40) |
+    ((uint64_t)AES_DEC_SBOX[(temp >> 48) & 0xFF] << 48) |
+    ((uint64_t)AES_DEC_SBOX[(temp >> 56) & 0xFF] << 56) 
+);
+
+WRITE_RD(temp);
+