target/arm: Convert VZIP, VUZP to decodetree

Convert the Neon VZIP and VUZP insns in the 2-reg-misc group to
decodetree.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200616170844.13318-4-peter.maydell@linaro.org

3 files changed, 79 insertions, 90 deletions

diff --git a/target/arm/neon-dp.decode b/target/arm/neon-dp.decode
index dd521ba..ad9e17f 100644
--- a/target/arm/neon-dp.decode
+++ b/target/arm/neon-dp.decode
@@ -447,6 +447,9 @@ Vimm_1r          1111 001 . 1 . 000 ... .... cmode:4 0 . op:1 1 .... @1reg_imm
 
     VPADAL_S     1111 001 11 . 11 .. 00 .... 0 1100 . . 0 .... @2misc
     VPADAL_U     1111 001 11 . 11 .. 00 .... 0 1101 . . 0 .... @2misc
+
+    VUZP         1111 001 11 . 11 .. 10 .... 0 0010 . . 0 .... @2misc
+    VZIP         1111 001 11 . 11 .. 10 .... 0 0011 . . 0 .... @2misc
   ]
 
   # Subgroup for size != 0b11
diff --git a/target/arm/translate-neon.inc.c b/target/arm/translate-neon.inc.c
index 2f7bd0d..f4799dd 100644
--- a/target/arm/translate-neon.inc.c
+++ b/target/arm/translate-neon.inc.c
@@ -3169,3 +3169,77 @@ static bool trans_VPADAL_U(DisasContext *s, arg_2misc *a)
     return do_2misc_pairwise(s, a, widenfn[a->size], opfn[a->size],
                              accfn[a->size]);
 }
+
+typedef void ZipFn(TCGv_ptr, TCGv_ptr);
+
+static bool do_zip_uzp(DisasContext *s, arg_2misc *a,
+                       ZipFn *fn)
+{
+    TCGv_ptr pd, pm;
+
+    if (!arm_dc_feature(s, ARM_FEATURE_NEON)) {
+        return false;
+    }
+
+    /* UNDEF accesses to D16-D31 if they don't exist. */
+    if (!dc_isar_feature(aa32_simd_r32, s) &&
+        ((a->vd | a->vm) & 0x10)) {
+        return false;
+    }
+
+    if ((a->vd | a->vm) & a->q) {
+        return false;
+    }
+
+    if (!fn) {
+        /* Bad size or size/q combination */
+        return false;
+    }
+
+    if (!vfp_access_check(s)) {
+        return true;
+    }
+
+    pd = vfp_reg_ptr(true, a->vd);
+    pm = vfp_reg_ptr(true, a->vm);
+    fn(pd, pm);
+    tcg_temp_free_ptr(pd);
+    tcg_temp_free_ptr(pm);
+    return true;
+}
+
+static bool trans_VUZP(DisasContext *s, arg_2misc *a)
+{
+    static ZipFn * const fn[2][4] = {
+        {
+            gen_helper_neon_unzip8,
+            gen_helper_neon_unzip16,
+            NULL,
+            NULL,
+        }, {
+            gen_helper_neon_qunzip8,
+            gen_helper_neon_qunzip16,
+            gen_helper_neon_qunzip32,
+            NULL,
+        }
+    };
+    return do_zip_uzp(s, a, fn[a->q][a->size]);
+}
+
+static bool trans_VZIP(DisasContext *s, arg_2misc *a)
+{
+    static ZipFn * const fn[2][4] = {
+        {
+            gen_helper_neon_zip8,
+            gen_helper_neon_zip16,
+            NULL,
+            NULL,
+        }, {
+            gen_helper_neon_qzip8,
+            gen_helper_neon_qzip16,
+            gen_helper_neon_qzip32,
+            NULL,
+        }
+    };
+    return do_zip_uzp(s, a, fn[a->q][a->size]);
+}
diff --git a/target/arm/translate.c b/target/arm/translate.c
index 4405b03..442f287 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -2934,86 +2934,6 @@ static void gen_exception_return(DisasContext *s, TCGv_i32 pc)
     gen_rfe(s, pc, load_cpu_field(spsr));
 }
 
-static int gen_neon_unzip(int rd, int rm, int size, int q)
-{
-    TCGv_ptr pd, pm;
-    
-    if (!q && size == 2) {
-        return 1;
-    }
-    pd = vfp_reg_ptr(true, rd);
-    pm = vfp_reg_ptr(true, rm);
-    if (q) {
-        switch (size) {
-        case 0:
-            gen_helper_neon_qunzip8(pd, pm);
-            break;
-        case 1:
-            gen_helper_neon_qunzip16(pd, pm);
-            break;
-        case 2:
-            gen_helper_neon_qunzip32(pd, pm);
-            break;
-        default:
-            abort();
-        }
-    } else {
-        switch (size) {
-        case 0:
-            gen_helper_neon_unzip8(pd, pm);
-            break;
-        case 1:
-            gen_helper_neon_unzip16(pd, pm);
-            break;
-        default:
-            abort();
-        }
-    }
-    tcg_temp_free_ptr(pd);
-    tcg_temp_free_ptr(pm);
-    return 0;
-}
-
-static int gen_neon_zip(int rd, int rm, int size, int q)
-{
-    TCGv_ptr pd, pm;
-
-    if (!q && size == 2) {
-        return 1;
-    }
-    pd = vfp_reg_ptr(true, rd);
-    pm = vfp_reg_ptr(true, rm);
-    if (q) {
-        switch (size) {
-        case 0:
-            gen_helper_neon_qzip8(pd, pm);
-            break;
-        case 1:
-            gen_helper_neon_qzip16(pd, pm);
-            break;
-        case 2:
-            gen_helper_neon_qzip32(pd, pm);
-            break;
-        default:
-            abort();
-        }
-    } else {
-        switch (size) {
-        case 0:
-            gen_helper_neon_zip8(pd, pm);
-            break;
-        case 1:
-            gen_helper_neon_zip16(pd, pm);
-            break;
-        default:
-            abort();
-        }
-    }
-    tcg_temp_free_ptr(pd);
-    tcg_temp_free_ptr(pm);
-    return 0;
-}
-
 static void gen_neon_trn_u8(TCGv_i32 t0, TCGv_i32 t1)
 {
     TCGv_i32 rd, tmp;
@@ -5082,6 +5002,8 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
                 case NEON_2RM_VREV64:
                 case NEON_2RM_VPADDL: case NEON_2RM_VPADDL_U:
                 case NEON_2RM_VPADAL: case NEON_2RM_VPADAL_U:
+                case NEON_2RM_VUZP:
+                case NEON_2RM_VZIP:
                     /* handled by decodetree */
                     return 1;
                 case NEON_2RM_VTRN:
@@ -5097,16 +5019,6 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
                         goto elementwise;
                     }
                     break;
-                case NEON_2RM_VUZP:
-                    if (gen_neon_unzip(rd, rm, size, q)) {
-                        return 1;
-                    }
-                    break;
-                case NEON_2RM_VZIP:
-                    if (gen_neon_zip(rd, rm, size, q)) {
-                        return 1;
-                    }
-                    break;
                 case NEON_2RM_VMOVN: case NEON_2RM_VQMOVN:
                     /* also VQMOVUN; op field and mnemonics don't line up */
                     if (rm & 1) {