target/arm: Pass env pointer through to gvec_bfdot_idx helper

Pass the env pointer through to the gvec_bfdot_idx helper,
so we can use it to add support for FEAT_EBF16.

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

target/arm/helper.h

@@ -1029,8 +1029,8 @@ DEF_HELPER_FLAGS_5(gvec_usmmla_b, TCG_CALL_NO_RWG,
 
 DEF_HELPER_FLAGS_6(gvec_bfdot, TCG_CALL_NO_RWG,
                    void, ptr, ptr, ptr, ptr, env, i32)
-DEF_HELPER_FLAGS_5(gvec_bfdot_idx, TCG_CALL_NO_RWG,
-                   void, ptr, ptr, ptr, ptr, i32)
+DEF_HELPER_FLAGS_6(gvec_bfdot_idx, TCG_CALL_NO_RWG,
+                   void, ptr, ptr, ptr, ptr, env, i32)
 
 DEF_HELPER_FLAGS_5(gvec_bfmmla, TCG_CALL_NO_RWG,
                    void, ptr, ptr, ptr, ptr, i32)

target/arm/tcg/translate-a64.c

@@ -6410,13 +6410,22 @@ static bool do_dot_vector_idx(DisasContext *s, arg_qrrx_e *a,
     return true;
 }
 
+static bool do_dot_vector_idx_env(DisasContext *s, arg_qrrx_e *a,
+                                  gen_helper_gvec_4_ptr *fn)
+{
+    if (fp_access_check(s)) {
+        gen_gvec_op4_env(s, a->q, a->rd, a->rn, a->rm, a->rd, a->idx, fn);
+    }
+    return true;
+}
+
 TRANS_FEAT(SDOT_vi, aa64_dp, do_dot_vector_idx, a, gen_helper_gvec_sdot_idx_b)
 TRANS_FEAT(UDOT_vi, aa64_dp, do_dot_vector_idx, a, gen_helper_gvec_udot_idx_b)
 TRANS_FEAT(SUDOT_vi, aa64_i8mm, do_dot_vector_idx, a,
            gen_helper_gvec_sudot_idx_b)
 TRANS_FEAT(USDOT_vi, aa64_i8mm, do_dot_vector_idx, a,
            gen_helper_gvec_usdot_idx_b)
-TRANS_FEAT(BFDOT_vi, aa64_bf16, do_dot_vector_idx, a,
+TRANS_FEAT(BFDOT_vi, aa64_bf16, do_dot_vector_idx_env, a,
            gen_helper_gvec_bfdot_idx)
 
 static bool trans_BFMLAL_vi(DisasContext *s, arg_qrrx_e *a)

target/arm/tcg/translate-neon.c

@@ -391,8 +391,8 @@ static bool trans_VDOT_b16_scal(DisasContext *s, arg_VDOT_b16_scal *a)
     if (!dc_isar_feature(aa32_bf16, s)) {
         return false;
     }
-    return do_neon_ddda(s, a->q * 6, a->vd, a->vn, a->vm, a->index,
-                        gen_helper_gvec_bfdot_idx);
+    return do_neon_ddda_env(s, a->q * 6, a->vd, a->vn, a->vm, a->index,
+                            gen_helper_gvec_bfdot_idx);
 }
 
 static bool trans_VFML_scalar(DisasContext *s, arg_VFML_scalar *a)

target/arm/tcg/translate-sve.c

@@ -265,6 +265,12 @@ static bool gen_gvec_env_arg_zzzz(DisasContext *s, gen_helper_gvec_4_ptr *fn,
     return gen_gvec_env_zzzz(s, fn, a->rd, a->rn, a->rm, a->ra, data);
 }
 
+static bool gen_gvec_env_arg_zzxz(DisasContext *s, gen_helper_gvec_4_ptr *fn,
+                                  arg_rrxr_esz *a)
+{
+    return gen_gvec_env_zzzz(s, fn, a->rd, a->rn, a->rm, a->ra, a->index);
+}
+
 /* Invoke an out-of-line helper on 4 Zregs, 1 Preg, plus fpst. */
 static bool gen_gvec_fpst_zzzzp(DisasContext *s, gen_helper_gvec_5_ptr *fn,
                                 int rd, int rn, int rm, int ra, int pg,
@@ -7128,7 +7134,7 @@ TRANS_FEAT_NONSTREAMING(UMMLA, aa64_sve_i8mm, gen_gvec_ool_arg_zzzz,
 
 TRANS_FEAT(BFDOT_zzzz, aa64_sve_bf16, gen_gvec_env_arg_zzzz,
            gen_helper_gvec_bfdot, a, 0)
-TRANS_FEAT(BFDOT_zzxz, aa64_sve_bf16, gen_gvec_ool_arg_zzxz,
+TRANS_FEAT(BFDOT_zzxz, aa64_sve_bf16, gen_gvec_env_arg_zzxz,
            gen_helper_gvec_bfdot_idx, a)
 
 TRANS_FEAT_NONSTREAMING(BFMMLA, aa64_sve_bf16, gen_gvec_ool_arg_zzzz,

target/arm/tcg/vec_helper.c

@@ -2828,7 +2828,7 @@ void HELPER(gvec_bfdot)(void *vd, void *vn, void *vm, void *va,
 }
 
 void HELPER(gvec_bfdot_idx)(void *vd, void *vn, void *vm,
-                            void *va, uint32_t desc)
+                            void *va, CPUARMState *env, uint32_t desc)
 {
     intptr_t i, j, opr_sz = simd_oprsz(desc);
     intptr_t index = simd_data(desc);