target/arm: Convert XAR to decodetree

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20240524232121.284515-17-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/target/arm/tcg/a64.decode b/target/arm/tcg/a64.decode
index 1292312a7f94b7abb0a9e98b76f3235f54e08a9b..7f354af25d3223e9c705602740abe7e7358dea5f 100644 (file)
--- a/target/arm/tcg/a64.decode
+++ b/target/arm/tcg/a64.decode
@@ -654,3 +654,7 @@ SM3TT1A         11001110 010 ..... 10 .. 00 ..... ..... @crypto3i
 SM3TT1B         11001110 010 ..... 10 .. 01 ..... ..... @crypto3i
 SM3TT2A         11001110 010 ..... 10 .. 10 ..... ..... @crypto3i
 SM3TT2B         11001110 010 ..... 10 .. 11 ..... ..... @crypto3i
+
+### Cryptographic XAR
+
+XAR             1100 1110 100 rm:5 imm:6 rn:5 rd:5

diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index cf3a7dfa99fa1baead84f17296ad78abd66cfd01..75f1e6a7b905af3266257a9e3479365c9586bffe 100644 (file)
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -4688,6 +4688,20 @@ TRANS_FEAT(SM3TT1B, aa64_sm3, do_crypto3i, a, gen_helper_crypto_sm3tt1b)
 TRANS_FEAT(SM3TT2A, aa64_sm3, do_crypto3i, a, gen_helper_crypto_sm3tt2a)
 TRANS_FEAT(SM3TT2B, aa64_sm3, do_crypto3i, a, gen_helper_crypto_sm3tt2b)
 
+static bool trans_XAR(DisasContext *s, arg_XAR *a)
+{
+    if (!dc_isar_feature(aa64_sha3, s)) {
+        return false;
+    }
+    if (fp_access_check(s)) {
+        gen_gvec_xar(MO_64, vec_full_reg_offset(s, a->rd),
+                     vec_full_reg_offset(s, a->rn),
+                     vec_full_reg_offset(s, a->rm), a->imm, 16,
+                     vec_full_reg_size(s));
+    }
+    return true;
+}
+
 /* Shift a TCGv src by TCGv shift_amount, put result in dst.
  * Note that it is the caller's responsibility to ensure that the
  * shift amount is in range (ie 0..31 or 0..63) and provide the ARM
@@ -13588,34 +13602,6 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
     }
 }
 
-/* Crypto XAR
- *  31                   21 20  16 15    10 9    5 4    0
- * +-----------------------+------+--------+------+------+
- * | 1 1 0 0 1 1 1 0 1 0 0 |  Rm  |  imm6  |  Rn  |  Rd  |
- * +-----------------------+------+--------+------+------+
- */
-static void disas_crypto_xar(DisasContext *s, uint32_t insn)
-{
-    int rm = extract32(insn, 16, 5);
-    int imm6 = extract32(insn, 10, 6);
-    int rn = extract32(insn, 5, 5);
-    int rd = extract32(insn, 0, 5);
-
-    if (!dc_isar_feature(aa64_sha3, s)) {
-        unallocated_encoding(s);
-        return;
-    }
-
-    if (!fp_access_check(s)) {
-        return;
-    }
-
-    gen_gvec_xar(MO_64, vec_full_reg_offset(s, rd),
-                 vec_full_reg_offset(s, rn),
-                 vec_full_reg_offset(s, rm), imm6, 16,
-                 vec_full_reg_size(s));
-}
-
 /* C3.6 Data processing - SIMD, inc Crypto
  *
  * As the decode gets a little complex we are using a table based
@@ -13644,7 +13630,6 @@ static const AArch64DecodeTable data_proc_simd[] = {
     { 0x5e000400, 0xdfe08400, disas_simd_scalar_copy },
     { 0x5f000000, 0xdf000400, disas_simd_indexed }, /* scalar indexed */
     { 0x5f000400, 0xdf800400, disas_simd_scalar_shift_imm },
-    { 0xce800000, 0xffe00000, disas_crypto_xar },
     { 0x0e400400, 0x9f60c400, disas_simd_three_reg_same_fp16 },
     { 0x0e780800, 0x8f7e0c00, disas_simd_two_reg_misc_fp16 },
     { 0x5e400400, 0xdf60c400, disas_simd_scalar_three_reg_same_fp16 },