[Qemu-devel] [PATCH 1/4] target-tricore: Added FTOUZ instruction

[peer.adelt@c-lab.de]

From: Peer Adelt <peer.adelt@c-lab.de>

Converts a 32-bit floating point number to an unsigned int. The
result is rounded towards zero.

Signed-off-by: Peer Adelt <peer.adelt@c-lab.de>
---
 target-tricore/fpu_helper.c | 20 ++++++++++++++++++++
 target-tricore/helper.h     |  1 +
 target-tricore/translate.c  |  3 +++
 3 files changed, 24 insertions(+)

diff --git a/target-tricore/fpu_helper.c b/target-tricore/fpu_helper.c
index 98fe947..ccaa6b0 100644
--- a/target-tricore/fpu_helper.c
+++ b/target-tricore/fpu_helper.c
@@ -215,3 +215,23 @@ uint32_t helper_itof(CPUTriCoreState *env, uint32_t arg)
     }
     return (uint32_t)f_result;
 }
+
+uint32_t helper_ftouz(CPUTriCoreState *env, uint32_t arg)
+{
+    float32 f_arg = make_float32(arg);
+    uint32_t result;
+    int32_t flags;
+
+    result = float32_to_uint32_round_to_zero(f_arg, &env->fp_status);
+
+    flags = f_get_excp_flags(env);
+    if (flags) {
+        if (float32_is_any_nan(f_arg)) {
+            result = 0;
+        }
+        f_update_psw_flags(env, flags);
+    } else {
+        env->FPU_FS = 0;
+    }
+    return (uint32_t)result;
+}
diff --git a/target-tricore/helper.h b/target-tricore/helper.h
index 9333e16..467c880 100644
--- a/target-tricore/helper.h
+++ b/target-tricore/helper.h
@@ -112,6 +112,7 @@ DEF_HELPER_3(fdiv, i32, env, i32, i32)
 DEF_HELPER_3(fcmp, i32, env, i32, i32)
 DEF_HELPER_2(ftoi, i32, env, i32)
 DEF_HELPER_2(itof, i32, env, i32)
+DEF_HELPER_2(ftouz, i32, env, i32)
 /* dvinit */
 DEF_HELPER_3(dvinit_b_13, i64, env, i32, i32)
 DEF_HELPER_3(dvinit_b_131, i64, env, i32, i32)
diff --git a/target-tricore/translate.c b/target-tricore/translate.c
index 83fa4fc..a109c15 100644
--- a/target-tricore/translate.c
+++ b/target-tricore/translate.c
@@ -6698,6 +6698,9 @@ static void decode_rr_divide(CPUTriCoreState *env, DisasContext *ctx)
     case OPC2_32_RR_ITOF:
         gen_helper_itof(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1]);
         break;
+    case OPC2_32_RR_FTOUZ:
+        gen_helper_ftouz(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1]);
+        break;
     default:
         generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
     }
-- 
2.7.4 (Apple Git-66)