diff mbox series

[03/17] target/arm: Convert TBL, TBX to decodetree

Message ID 20240717060903.205098-4-richard.henderson@linaro.org (mailing list archive)
State New, archived
Headers show
Series target/arm: AdvSIMD decodetree conversion, part 4 | expand

Commit Message

Richard Henderson July 17, 2024, 6:08 a.m. UTC 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/tcg/translate-a64.c | 47 ++++++++++------------------------
 target/arm/tcg/a64.decode      |  4 +++
 2 files changed, 18 insertions(+), 33 deletions(-)

Comments

Philippe Mathieu-Daudé July 17, 2024, 9:56 a.m. UTC | #1 
On 17/7/24 08:08, Richard Henderson wrote:
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   target/arm/tcg/translate-a64.c | 47 ++++++++++------------------------
>   target/arm/tcg/a64.decode      |  4 +++
>   2 files changed, 18 insertions(+), 33 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
diff mbox series

Patch

diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 6ca24d9842..7e3bde93fe 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -4657,6 +4657,20 @@  static bool trans_EXTR(DisasContext *s, arg_extract *a)
     return true;
 }
 
+static bool trans_TBL_TBX(DisasContext *s, arg_TBL_TBX *a)
+{
+    if (fp_access_check(s)) {
+        int len = (a->len + 1) * 16;
+
+        tcg_gen_gvec_2_ptr(vec_full_reg_offset(s, a->rd),
+                           vec_full_reg_offset(s, a->rm), tcg_env,
+                           a->q ? 16 : 8, vec_full_reg_size(s),
+                           (len << 6) | (a->tbx << 5) | a->rn,
+                           gen_helper_simd_tblx);
+    }
+    return true;
+}
+
 /*
  * Cryptographic AES, SHA, SHA512
  */
@@ -8897,38 +8911,6 @@  static void disas_data_proc_fp(DisasContext *s, uint32_t insn)
     }
 }
 
-/* TBL/TBX
- *   31  30 29         24 23 22  21 20  16 15  14 13  12  11 10 9    5 4    0
- * +---+---+-------------+-----+---+------+---+-----+----+-----+------+------+
- * | 0 | Q | 0 0 1 1 1 0 | op2 | 0 |  Rm  | 0 | len | op | 0 0 |  Rn  |  Rd  |
- * +---+---+-------------+-----+---+------+---+-----+----+-----+------+------+
- */
-static void disas_simd_tb(DisasContext *s, uint32_t insn)
-{
-    int op2 = extract32(insn, 22, 2);
-    int is_q = extract32(insn, 30, 1);
-    int rm = extract32(insn, 16, 5);
-    int rn = extract32(insn, 5, 5);
-    int rd = extract32(insn, 0, 5);
-    int is_tbx = extract32(insn, 12, 1);
-    int len = (extract32(insn, 13, 2) + 1) * 16;
-
-    if (op2 != 0) {
-        unallocated_encoding(s);
-        return;
-    }
-
-    if (!fp_access_check(s)) {
-        return;
-    }
-
-    tcg_gen_gvec_2_ptr(vec_full_reg_offset(s, rd),
-                       vec_full_reg_offset(s, rm), tcg_env,
-                       is_q ? 16 : 8, vec_full_reg_size(s),
-                       (len << 6) | (is_tbx << 5) | rn,
-                       gen_helper_simd_tblx);
-}
-
 /* ZIP/UZP/TRN
  *   31  30 29         24 23  22  21 20   16 15 14 12 11 10 9    5 4    0
  * +---+---+-------------+------+---+------+---+------------------+------+
@@ -11792,7 +11774,6 @@  static const AArch64DecodeTable data_proc_simd[] = {
     /* simd_mod_imm decode is a subset of simd_shift_imm, so must precede it */
     { 0x0f000400, 0x9ff80400, disas_simd_mod_imm },
     { 0x0f000400, 0x9f800400, disas_simd_shift_imm },
-    { 0x0e000000, 0xbf208c00, disas_simd_tb },
     { 0x0e000800, 0xbf208c00, disas_simd_zip_trn },
     { 0x5e200800, 0xdf3e0c00, disas_simd_scalar_two_reg_misc },
     { 0x5f000400, 0xdf800400, disas_simd_scalar_shift_imm },
diff --git a/target/arm/tcg/a64.decode b/target/arm/tcg/a64.decode
index 05927fade6..45896902d5 100644
--- a/target/arm/tcg/a64.decode
+++ b/target/arm/tcg/a64.decode
@@ -1141,3 +1141,7 @@  FNMSUB          0001 1111 .. 1 ..... 1 ..... ..... .....    @rrrr_hsd
 
 EXT_d           0010 1110 00 0 rm:5 00 imm:3 0 rn:5 rd:5
 EXT_q           0110 1110 00 0 rm:5 0  imm:4 0 rn:5 rd:5
+
+# Advanced SIMD Table Lookup
+
+TBL_TBX         0 q:1 00 1110 000 rm:5 0 len:2 tbx:1 00 rn:5 rd:5