[v2,5/7] target-tricore: Add div.f instruction

Commit Message

Bastian Koppelmann March 8, 2016, 5:42 p.m. UTC

Signed-off-by: Bastian Koppelmann <[e-mail]>
---
v1 -> v2:
    - Make exceptional case exceptional

 target-tricore/fpu_helper.c | 29 +++++++++++++++++++++++++++++
 target-tricore/helper.h     |  1 +
 target-tricore/translate.c  |  3 +++
 3 files changed, 33 insertions(+)

Comments

Richard Henderson March 8, 2016, 6:43 p.m. UTC | #1

On 03/08/2016 12:42 PM, Bastian Koppelmann wrote:
> +    arg1 = float32_squash_input_denormal(arg1, &env->fp_status);
> +    arg2 = float32_squash_input_denormal(arg2, &env->fp_status);
> +
> +    f_result = float32_div(arg1, arg2 , &env->fp_status);


Same as add/sub.

Reviewed-by: Richard Henderson <[e-mail]>


r~

Patch

diff --git a/target-tricore/fpu_helper.c b/target-tricore/fpu_helper.c
index 80a9472..514ec0c 100644
--- a/target-tricore/fpu_helper.c
+++ b/target-tricore/fpu_helper.c
@@ -137,3 +137,32 @@  uint32_t helper_fmul(CPUTriCoreState *env, uint32_t r1, uint32_t r2)
     return (uint32_t)f_result;
 
 }
+
+uint32_t helper_fdiv(CPUTriCoreState *env, uint32_t r1, uint32_t r2)
+{
+    uint32_t flags;
+    float32 arg1 = make_float32(r1);
+    float32 arg2 = make_float32(r2);
+    float32 f_result;
+
+    arg1 = float32_squash_input_denormal(arg1, &env->fp_status);
+    arg2 = float32_squash_input_denormal(arg2, &env->fp_status);
+
+    f_result = float32_div(arg1, arg2 , &env->fp_status);
+
+    flags = f_get_excp_flags(env);
+    if (flags) {
+        /* If the output is a NaN, but the inputs aren't,
+           we return a unique value.  */
+        if ((flags & float_flag_invalid)
+            && !float32_is_any_nan(arg1)
+            && !float32_is_any_nan(arg2)) {
+                f_result = DIV_NAN;
+        }
+        f_update_psw_flags(env, flags);
+    } else {
+        env->FPU_FS = 0;
+    }
+
+    return (uint32_t)f_result;
+}
diff --git a/target-tricore/helper.h b/target-tricore/helper.h
index ac41190..f5eff36 100644
--- a/target-tricore/helper.h
+++ b/target-tricore/helper.h
@@ -108,6 +108,7 @@  DEF_HELPER_1(unpack, i64, i32)
 DEF_HELPER_3(fadd, i32, env, i32, i32)
 DEF_HELPER_3(fsub, i32, env, i32, i32)
 DEF_HELPER_3(fmul, i32, env, i32, i32)
+DEF_HELPER_3(fdiv, i32, env, i32, 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 38ac8d6..6adeebb 100644
--- a/target-tricore/translate.c
+++ b/target-tricore/translate.c
@@ -6675,6 +6675,9 @@  static void decode_rr_divide(CPUTriCoreState *env, DisasContext *ctx)
     case OPC2_32_RR_MUL_F:
         gen_helper_fmul(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1], cpu_gpr_d[r2]);
         break;
+    case OPC2_32_RR_DIV_F:
+        gen_helper_fdiv(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1], cpu_gpr_d[r2]);
+        break;
     default:
         generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
     }