target/loongarch: Add floating point comparison instruction translation

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

diff --git a/target/loongarch/fpu_helper.c b/target/loongarch/fpu_helper.c
index d7442cc1887907ca9699c72936bd30d5df3524c5..1e514cce74ec01b2667946f517ab4708b0ec22dc 100644 (file)
--- a/target/loongarch/fpu_helper.c
+++ b/target/loongarch/fpu_helper.c
@@ -401,3 +401,63 @@ uint64_t helper_fmuladd_d(CPULoongArchState *env, uint64_t fj,
     update_fcsr0(env, GETPC());
     return fd;
 }
+
+static uint64_t fcmp_common(CPULoongArchState *env, FloatRelation cmp,
+                            uint32_t flags)
+{
+    bool ret;
+
+    switch (cmp) {
+    case float_relation_less:
+        ret = (flags & FCMP_LT);
+        break;
+    case float_relation_equal:
+        ret = (flags & FCMP_EQ);
+        break;
+    case float_relation_greater:
+        ret = (flags & FCMP_GT);
+        break;
+    case float_relation_unordered:
+        ret = (flags & FCMP_UN);
+        break;
+    default:
+        g_assert_not_reached();
+    }
+    update_fcsr0(env, GETPC());
+
+    return ret;
+}
+
+/* fcmp_cXXX_s */
+uint64_t helper_fcmp_c_s(CPULoongArchState *env, uint64_t fj,
+                         uint64_t fk, uint32_t flags)
+{
+    FloatRelation cmp = float32_compare_quiet((uint32_t)fj,
+                                              (uint32_t)fk, &env->fp_status);
+    return fcmp_common(env, cmp, flags);
+}
+
+/* fcmp_sXXX_s */
+uint64_t helper_fcmp_s_s(CPULoongArchState *env, uint64_t fj,
+                         uint64_t fk, uint32_t flags)
+{
+    FloatRelation cmp = float32_compare((uint32_t)fj,
+                                        (uint32_t)fk, &env->fp_status);
+    return fcmp_common(env, cmp, flags);
+}
+
+/* fcmp_cXXX_d */
+uint64_t helper_fcmp_c_d(CPULoongArchState *env, uint64_t fj,
+                         uint64_t fk, uint32_t flags)
+{
+    FloatRelation cmp = float64_compare_quiet(fj, fk, &env->fp_status);
+    return fcmp_common(env, cmp, flags);
+}
+
+/* fcmp_sXXX_d */
+uint64_t helper_fcmp_s_d(CPULoongArchState *env, uint64_t fj,
+                         uint64_t fk, uint32_t flags)
+{
+    FloatRelation cmp = float64_compare(fj, fk, &env->fp_status);
+    return fcmp_common(env, cmp, flags);
+}