[PATCH v4 70/78] target/arm: Implement SVE2 FCVTXNT, FCVTX

[Richard Henderson]

From: Stephen Long <steplong@quicinc.com>

Signed-off-by: Stephen Long <steplong@quicinc.com>
Message-Id: <20200428174332.17162-4-steplong@quicinc.com>
[rth: Use do_frint_mode, which avoids a specific runtime helper.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/sve.decode      |  2 ++
 target/arm/translate-sve.c | 49 ++++++++++++++++++++++++++++++--------
 2 files changed, 41 insertions(+), 10 deletions(-)

diff --git a/target/arm/sve.decode b/target/arm/sve.decode
index d152193e89..4fcd1b43f7 100644
--- a/target/arm/sve.decode
+++ b/target/arm/sve.decode
@@ -1575,6 +1575,8 @@ SM4EKEY         01000101 00 1 ..... 11110 0 ..... .....  
@rd_rn_rm_e0
 RAX1            01000101 00 1 ..... 11110 1 ..... .....  @rd_rn_rm_e0
 
 ### SVE2 floating-point convert precision odd elements
+FCVTXNT_ds      01100100 00 0010 10 101 ... ..... .....  @rd_pg_rn_e0
+FCVTX_ds        01100101 00 0010 10 101 ... ..... .....  @rd_pg_rn_e0
 FCVTNT_sh       01100100 10 0010 00 101 ... ..... .....  @rd_pg_rn_e0
 FCVTLT_hs       01100100 10 0010 01 101 ... ..... .....  @rd_pg_rn_e0
 FCVTNT_ds       01100100 11 0010 10 101 ... ..... .....  @rd_pg_rn_e0
diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c
index c29984d244..14a6a53320 100644
--- a/target/arm/translate-sve.c
+++ b/target/arm/translate-sve.c
@@ -4765,11 +4765,9 @@ static bool trans_FRINTX(DisasContext *s, arg_rpr_esz *a)
     return do_zpz_ptr(s, a->rd, a->rn, a->pg, a->esz == MO_16, fns[a->esz - 
1]);
 }
 
-static bool do_frint_mode(DisasContext *s, arg_rpr_esz *a, int mode)
+static bool do_frint_mode(DisasContext *s, arg_rpr_esz *a,
+                          int mode, gen_helper_gvec_3_ptr *fn)
 {
-    if (a->esz == 0) {
-        return false;
-    }
     if (sve_access_check(s)) {
         unsigned vsz = vec_full_reg_size(s);
         TCGv_i32 tmode = tcg_const_i32(mode);
@@ -4780,7 +4778,7 @@ static bool do_frint_mode(DisasContext *s, arg_rpr_esz 
*a, int mode)
         tcg_gen_gvec_3_ptr(vec_full_reg_offset(s, a->rd),
                            vec_full_reg_offset(s, a->rn),
                            pred_full_reg_offset(s, a->pg),
-                           status, vsz, vsz, 0, frint_fns[a->esz - 1]);
+                           status, vsz, vsz, 0, fn);
 
         gen_helper_set_rmode(tmode, tmode, status);
         tcg_temp_free_i32(tmode);
@@ -4791,27 +4789,42 @@ static bool do_frint_mode(DisasContext *s, arg_rpr_esz 
*a, int mode)
 
 static bool trans_FRINTN(DisasContext *s, arg_rpr_esz *a)
 {
-    return do_frint_mode(s, a, float_round_nearest_even);
+    if (a->esz == 0) {
+        return false;
+    }
+    return do_frint_mode(s, a, float_round_nearest_even, frint_fns[a->esz - 
1]);
 }
 
 static bool trans_FRINTP(DisasContext *s, arg_rpr_esz *a)
 {
-    return do_frint_mode(s, a, float_round_up);
+    if (a->esz == 0) {
+        return false;
+    }
+    return do_frint_mode(s, a, float_round_up, frint_fns[a->esz - 1]);
 }
 
 static bool trans_FRINTM(DisasContext *s, arg_rpr_esz *a)
 {
-    return do_frint_mode(s, a, float_round_down);
+    if (a->esz == 0) {
+        return false;
+    }
+    return do_frint_mode(s, a, float_round_down, frint_fns[a->esz - 1]);
 }
 
 static bool trans_FRINTZ(DisasContext *s, arg_rpr_esz *a)
 {
-    return do_frint_mode(s, a, float_round_to_zero);
+    if (a->esz == 0) {
+        return false;
+    }
+    return do_frint_mode(s, a, float_round_to_zero, frint_fns[a->esz - 1]);
 }
 
 static bool trans_FRINTA(DisasContext *s, arg_rpr_esz *a)
 {
-    return do_frint_mode(s, a, float_round_ties_away);
+    if (a->esz == 0) {
+        return false;
+    }
+    return do_frint_mode(s, a, float_round_ties_away, frint_fns[a->esz - 1]);
 }
 
 static bool trans_FRECPX(DisasContext *s, arg_rpr_esz *a)
@@ -8253,3 +8266,19 @@ static bool trans_FCVTLT_sd(DisasContext *s, arg_rpr_esz 
*a)
     }
     return do_zpz_ptr(s, a->rd, a->rn, a->pg, false, 
gen_helper_sve2_fcvtlt_sd);
 }
+
+static bool trans_FCVTX_ds(DisasContext *s, arg_rpr_esz *a)
+{
+    if (!dc_isar_feature(aa64_sve2, s)) {
+        return false;
+    }
+    return do_frint_mode(s, a, float_round_to_odd, gen_helper_sve_fcvt_ds);
+}
+
+static bool trans_FCVTXNT_ds(DisasContext *s, arg_rpr_esz *a)
+{
+    if (!dc_isar_feature(aa64_sve2, s)) {
+        return false;
+    }
+    return do_frint_mode(s, a, float_round_to_odd, gen_helper_sve2_fcvtnt_ds);
+}
-- 
2.25.1