target/arm: Handle FPCR.NEP for 3-input scalar operations

Handle FPCR.NEP for the 3-input scalar operations which use
do_fmla_scalar_idx() and do_fmadd(), by making them call the
appropriate write_fp_*reg_merging() functions.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 67c85db4775a5db13a7f09763e3524d7ab445a73..3f6e31d36a5f9ade4819d79d6f4386c68fde6a10 100644 (file)
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -6345,7 +6345,7 @@ static bool do_fmla_scalar_idx(DisasContext *s, arg_rrx_e *a, bool neg)
                 gen_vfp_negd(t1, t1);
             }
             gen_helper_vfp_muladdd(t0, t1, t2, t0, fpstatus_ptr(FPST_A64));
-            write_fp_dreg(s, a->rd, t0);
+            write_fp_dreg_merging(s, a->rd, a->rd, t0);
         }
         break;
     case MO_32:
@@ -6359,7 +6359,7 @@ static bool do_fmla_scalar_idx(DisasContext *s, arg_rrx_e *a, bool neg)
                 gen_vfp_negs(t1, t1);
             }
             gen_helper_vfp_muladds(t0, t1, t2, t0, fpstatus_ptr(FPST_A64));
-            write_fp_sreg(s, a->rd, t0);
+            write_fp_sreg_merging(s, a->rd, a->rd, t0);
         }
         break;
     case MO_16:
@@ -6377,7 +6377,7 @@ static bool do_fmla_scalar_idx(DisasContext *s, arg_rrx_e *a, bool neg)
             }
             gen_helper_advsimd_muladdh(t0, t1, t2, t0,
                                        fpstatus_ptr(FPST_A64_F16));
-            write_fp_sreg(s, a->rd, t0);
+            write_fp_hreg_merging(s, a->rd, a->rd, t0);
         }
         break;
     default:
@@ -6856,7 +6856,7 @@ static bool do_fmadd(DisasContext *s, arg_rrrr_e *a, bool neg_a, bool neg_n)
             }
             fpst = fpstatus_ptr(FPST_A64);
             gen_helper_vfp_muladdd(ta, tn, tm, ta, fpst);
-            write_fp_dreg(s, a->rd, ta);
+            write_fp_dreg_merging(s, a->rd, a->ra, ta);
         }
         break;
 
@@ -6874,7 +6874,7 @@ static bool do_fmadd(DisasContext *s, arg_rrrr_e *a, bool neg_a, bool neg_n)
             }
             fpst = fpstatus_ptr(FPST_A64);
             gen_helper_vfp_muladds(ta, tn, tm, ta, fpst);
-            write_fp_sreg(s, a->rd, ta);
+            write_fp_sreg_merging(s, a->rd, a->ra, ta);
         }
         break;
 
@@ -6895,7 +6895,7 @@ static bool do_fmadd(DisasContext *s, arg_rrrr_e *a, bool neg_a, bool neg_n)
             }
             fpst = fpstatus_ptr(FPST_A64_F16);
             gen_helper_advsimd_muladdh(ta, tn, tm, ta, fpst);
-            write_fp_sreg(s, a->rd, ta);
+            write_fp_hreg_merging(s, a->rd, a->ra, ta);
         }
         break;