target/arm: Convert V[US]DOT (vector) to decodetree

Convert the V[US]DOT (vector) insns to decodetree.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200430181003.21682-7-peter.maydell@linaro.org

diff --git a/target/arm/neon-shared.decode b/target/arm/neon-shared.decode
index ed65dae180964a6078289eb5acc76beffe6fc71c..c9c641905d3ca179393657c09962b172e0d6f833 100644 (file)
--- a/target/arm/neon-shared.decode
+++ b/target/arm/neon-shared.decode
@@ -39,3 +39,7 @@ VCMLA          1111 110 rot:2 . 1 size:1 .... .... 1000 . q:1 . 0 .... \
 
 VCADD          1111 110 rot:1 1 . 0 size:1 .... .... 1000 . q:1 . 0 .... \
                vm=%vm_dp vn=%vn_dp vd=%vd_dp
+
+# VUDOT and VSDOT
+VDOT           1111 110 00 . 10 .... .... 1101 . q:1 . u:1 .... \
+               vm=%vm_dp vn=%vn_dp vd=%vd_dp

diff --git a/target/arm/translate-neon.inc.c b/target/arm/translate-neon.inc.c
index 28011e88d9eaf4ef4b01c2c91255cb7136db5321..6537506c5b6f34f40f5b36b4fae601d81a848103 100644 (file)
--- a/target/arm/translate-neon.inc.c
+++ b/target/arm/translate-neon.inc.c
@@ -104,3 +104,35 @@ static bool trans_VCADD(DisasContext *s, arg_VCADD *a)
     tcg_temp_free_ptr(fpst);
     return true;
 }
+
+static bool trans_VDOT(DisasContext *s, arg_VDOT *a)
+{
+    int opr_sz;
+    gen_helper_gvec_3 *fn_gvec;
+
+    if (!dc_isar_feature(aa32_dp, s)) {
+        return false;
+    }
+
+    /* UNDEF accesses to D16-D31 if they don't exist. */
+    if (!dc_isar_feature(aa32_simd_r32, s) &&
+        ((a->vd | a->vn | a->vm) & 0x10)) {
+        return false;
+    }
+
+    if ((a->vn | a->vm | a->vd) & a->q) {
+        return false;
+    }
+
+    if (!vfp_access_check(s)) {
+        return true;
+    }
+
+    opr_sz = (1 + a->q) * 8;
+    fn_gvec = a->u ? gen_helper_gvec_udot_b : gen_helper_gvec_sdot_b;
+    tcg_gen_gvec_3_ool(vfp_reg_offset(1, a->vd),
+                       vfp_reg_offset(1, a->vn),
+                       vfp_reg_offset(1, a->vm),
+                       opr_sz, opr_sz, 0, fn_gvec);
+    return true;
+}

diff --git a/target/arm/translate.c b/target/arm/translate.c
index 993bead82ffa868a29d8afeaa22e451d994c6317..7d3aea8c98ac71f3fd46eef8fcd5731662cf4941 100644 (file)
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -7048,14 +7048,7 @@ static int disas_neon_insn_3same_ext(DisasContext *s, uint32_t insn)
     bool is_long = false, q = extract32(insn, 6, 1);
     bool ptr_is_env = false;
 
-    if ((insn & 0xfeb00f00) == 0xfc200d00) {
-        /* V[US]DOT -- 1111 1100 0.10 .... .... 1101 .Q.U .... */
-        bool u = extract32(insn, 4, 1);
-        if (!dc_isar_feature(aa32_dp, s)) {
-            return 1;
-        }
-        fn_gvec = u ? gen_helper_gvec_udot_b : gen_helper_gvec_sdot_b;
-    } else if ((insn & 0xff300f10) == 0xfc200810) {
+    if ((insn & 0xff300f10) == 0xfc200810) {
         /* VFM[AS]L -- 1111 1100 S.10 .... .... 1000 .Q.1 .... */
         int is_s = extract32(insn, 23, 1);
         if (!dc_isar_feature(aa32_fhm, s)) {