target-tricore: Add cmp.f instruction

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-Id: <1457708597-3025-7-git-send-email-kbastian@mail.uni-paderborn.de>

1 files changed, 23 insertions, 0 deletions

diff --git a/target-tricore/fpu_helper.c b/target-tricore/fpu_helper.c
index 5ae56e07f6..a60bf29625 100644
--- a/target-tricore/fpu_helper.c
+++ b/target-tricore/fpu_helper.c
@@ -158,3 +158,26 @@ uint32_t helper_fdiv(CPUTriCoreState *env, uint32_t r1, uint32_t r2)
 
     return (uint32_t)f_result;
 }
+
+uint32_t helper_fcmp(CPUTriCoreState *env, uint32_t r1, uint32_t r2)
+{
+    uint32_t result, flags;
+    float32 arg1 = make_float32(r1);
+    float32 arg2 = make_float32(r2);
+
+    set_flush_inputs_to_zero(0, &env->fp_status);
+
+    result = 1 << (float32_compare_quiet(arg1, arg2, &env->fp_status) + 1);
+    result |= f_is_denormal(arg1) << 4;
+    result |= f_is_denormal(arg2) << 5;
+
+    flags = f_get_excp_flags(env);
+    if (flags) {
+        f_update_psw_flags(env, flags);
+    } else {
+        env->FPU_FS = 0;
+    }
+
+    set_flush_inputs_to_zero(1, &env->fp_status);
+    return result;
+}