target/loongarch: Add fixed point bit instruction translation

[qemu.git] / target / loongarch / op_helper.c

diff --git a/target/loongarch/op_helper.c b/target/loongarch/op_helper.c
index 903810951e43ea9120179fa5f1cf72e53511b083..f4b22c70a05569e083b45892c4850c063fc29e5b 100644 (file)
--- a/target/loongarch/op_helper.c
+++ b/target/loongarch/op_helper.c
@@ -19,3 +19,24 @@ void helper_raise_exception(CPULoongArchState *env, uint32_t exception)
 {
     do_raise_exception(env, exception, GETPC());
 }
+
+target_ulong helper_bitrev_w(target_ulong rj)
+{
+    return (int32_t)revbit32(rj);
+}
+
+target_ulong helper_bitrev_d(target_ulong rj)
+{
+    return revbit64(rj);
+}
+
+target_ulong helper_bitswap(target_ulong v)
+{
+    v = ((v >> 1) & (target_ulong)0x5555555555555555ULL) |
+        ((v & (target_ulong)0x5555555555555555ULL) << 1);
+    v = ((v >> 2) & (target_ulong)0x3333333333333333ULL) |
+        ((v & (target_ulong)0x3333333333333333ULL) << 2);
+    v = ((v >> 4) & (target_ulong)0x0F0F0F0F0F0F0F0FULL) |
+        ((v & (target_ulong)0x0F0F0F0F0F0F0F0FULL) << 4);
+    return v;
+}