diff mbox

[v3,1/5] target-tricore: Added FTOUZ instruction

Message ID 20161111142018.22567-2-kbastian@mail.uni-paderborn.de (mailing list archive)
State New, archived
Headers show

Commit Message

Bastian Koppelmann Nov. 11, 2016, 2:20 p.m. UTC 
Converts a 32-bit floating point number to an unsigned int. The
result is rounded towards zero.

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
---
v2 -> v3:
    - simplified exception flag fixup in ftouz()

 target-tricore/fpu_helper.c | 27 +++++++++++++++++++++++++++
 target-tricore/helper.h     |  1 +
 target-tricore/translate.c  |  3 +++
 3 files changed, 31 insertions(+)

Comments

Richard Henderson Nov. 11, 2016, 2:32 p.m. UTC | #1 
On 11/11/2016 03:20 PM, Bastian Koppelmann wrote:
> Converts a 32-bit floating point number to an unsigned int. The
> result is rounded towards zero.
>
> Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
> ---
> v2 -> v3:
>     - simplified exception flag fixup in ftouz()

Reviewed-by: Richard Henderson <rth@twiddle.net>


r~
diff mbox

Patch

diff --git a/target-tricore/fpu_helper.c b/target-tricore/fpu_helper.c
index 98fe947..215c397 100644
--- a/target-tricore/fpu_helper.c
+++ b/target-tricore/fpu_helper.c
@@ -215,3 +215,30 @@  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 & float_flag_invalid) {
+        flags &= ~float_flag_inexact;
+        if (float32_is_any_nan(f_arg)) {
+            result = 0;
+        }
+    } else if (float32_lt_quiet(f_arg, 0, &env->fp_status)) {
+        flags = float_flag_invalid;
+        result = 0;
+    }
+
+    if (flags) {
+        f_update_psw_flags(env, flags);
+    } else {
+        env->FPU_FS = 0;
+    }
+    return 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 36f734a..eb6fdc3 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);
     }