[PATCH v3 13/32] target/mips: Convert MSA load/store instruction format to decodetree

[Philippe Mathieu-Daudé]

Convert load/store instructions to decodetree.

Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20211027180730.1551932-14-f4bug@amsat.org>
---
v3:
- Renamed &msa_ldst -> &msa_i
- Remove TRANS_MSA(), call check_msa_enabled in trans_X()
---
 target/mips/tcg/msa.decode      |  4 ++
 target/mips/tcg/msa_translate.c | 91 ++++++++++++---------------------
 2 files changed, 36 insertions(+), 59 deletions(-)

diff --git a/target/mips/tcg/msa.decode b/target/mips/tcg/msa.decode
index 24847599a05..0aeb83d5c5b 100644
--- a/target/mips/tcg/msa.decode
+++ b/target/mips/tcg/msa.decode
@@ -22,6 +22,7 @@
 %bit_m              16:7 !function=bit_m
 
 @lsa                ...... rs:5 rt:5 rd:5 ... sa:2 ......   &r
+@ldst               ...... sa:s10 ws:5 wd:5 .... df:2       &msa_i
 @bz_v               ...... ... ..    wt:5 sa:16             &msa_bz df=3
 @bz                 ...... ...  df:2 wt:5 sa:16             &msa_bz
 @u5                 ...... ... df:2 sa:5  ws:5 wd:5 ......  &msa_i
@@ -78,5 +79,8 @@ BNZ                 010001 111 .. ..... ................    
@bz
   SRARI             011110 010 ....... ..... .....  001010  @bit
   SRLRI             011110 011 ....... ..... .....  001010  @bit
 
+  LD                011110 .......... ..... .....   1000 .. @ldst
+  ST                011110 .......... ..... .....   1001 .. @ldst
+
   MSA               011110 --------------------------
 }
diff --git a/target/mips/tcg/msa_translate.c b/target/mips/tcg/msa_translate.c
index 8fc02bd5e24..53cafe53f14 100644
--- a/target/mips/tcg/msa_translate.c
+++ b/target/mips/tcg/msa_translate.c
@@ -41,16 +41,6 @@ enum {
     OPC_MSA_3RF_1B  = 0x1B | OPC_MSA,
     OPC_MSA_3RF_1C  = 0x1C | OPC_MSA,
     OPC_MSA_VEC     = 0x1E | OPC_MSA,
-
-    /* MI10 instruction */
-    OPC_LD_B        = (0x20) | OPC_MSA,
-    OPC_LD_H        = (0x21) | OPC_MSA,
-    OPC_LD_W        = (0x22) | OPC_MSA,
-    OPC_LD_D        = (0x23) | OPC_MSA,
-    OPC_ST_B        = (0x24) | OPC_MSA,
-    OPC_ST_H        = (0x25) | OPC_MSA,
-    OPC_ST_W        = (0x26) | OPC_MSA,
-    OPC_ST_D        = (0x27) | OPC_MSA,
 };
 
 enum {
@@ -322,9 +312,19 @@ static inline bool check_msa_enabled(DisasContext *ctx)
     return true;
 }
 
+typedef void gen_helper_piv(TCGv_ptr, TCGv_i32, TCGv);
 typedef void gen_helper_piii(TCGv_ptr, TCGv_i32, TCGv_i32, TCGv_i32);
 typedef void gen_helper_piiii(TCGv_ptr, TCGv_i32, TCGv_i32, TCGv_i32, 
TCGv_i32);
 
+#define TRANS_DF_x(TYPE, NAME, trans_func, gen_func) \
+    static gen_helper_p##TYPE * const NAME##_tab[4] = { \
+        gen_func##_b, gen_func##_h, gen_func##_w, gen_func##_d \
+    }; \
+    TRANS(NAME, trans_func, NAME##_tab[a->df])
+
+#define TRANS_DF_iv(NAME, trans_func, gen_func) \
+    TRANS_DF_x(iv, NAME, trans_func, gen_func)
+
 static void gen_check_zero_element(TCGv tresult, uint8_t df, uint8_t wt,
                                    TCGCond cond)
 {
@@ -2094,55 +2094,6 @@ static bool trans_MSA(DisasContext *ctx, arg_MSA *a)
     case OPC_MSA_VEC:
         gen_msa_vec(ctx);
         break;
-    case OPC_LD_B:
-    case OPC_LD_H:
-    case OPC_LD_W:
-    case OPC_LD_D:
-    case OPC_ST_B:
-    case OPC_ST_H:
-    case OPC_ST_W:
-    case OPC_ST_D:
-        {
-            int32_t s10 = sextract32(ctx->opcode, 16, 10);
-            uint8_t rs = (ctx->opcode >> 11) & 0x1f;
-            uint8_t wd = (ctx->opcode >> 6) & 0x1f;
-            uint8_t df = (ctx->opcode >> 0) & 0x3;
-
-            TCGv_i32 twd = tcg_const_i32(wd);
-            TCGv taddr = tcg_temp_new();
-            gen_base_offset_addr(ctx, taddr, rs, s10 << df);
-
-            switch (MASK_MSA_MINOR(opcode)) {
-            case OPC_LD_B:
-                gen_helper_msa_ld_b(cpu_env, twd, taddr);
-                break;
-            case OPC_LD_H:
-                gen_helper_msa_ld_h(cpu_env, twd, taddr);
-                break;
-            case OPC_LD_W:
-                gen_helper_msa_ld_w(cpu_env, twd, taddr);
-                break;
-            case OPC_LD_D:
-                gen_helper_msa_ld_d(cpu_env, twd, taddr);
-                break;
-            case OPC_ST_B:
-                gen_helper_msa_st_b(cpu_env, twd, taddr);
-                break;
-            case OPC_ST_H:
-                gen_helper_msa_st_h(cpu_env, twd, taddr);
-                break;
-            case OPC_ST_W:
-                gen_helper_msa_st_w(cpu_env, twd, taddr);
-                break;
-            case OPC_ST_D:
-                gen_helper_msa_st_d(cpu_env, twd, taddr);
-                break;
-            }
-
-            tcg_temp_free_i32(twd);
-            tcg_temp_free(taddr);
-        }
-        break;
     default:
         MIPS_INVAL("MSA instruction");
         gen_reserved_instruction(ctx);
@@ -2152,6 +2103,28 @@ static bool trans_MSA(DisasContext *ctx, arg_MSA *a)
     return true;
 }
 
+static bool trans_msa_ldst(DisasContext *ctx, arg_msa_i *a,
+                           gen_helper_piv *gen_msa_ldst)
+{
+    TCGv taddr;
+
+    if (!check_msa_enabled(ctx)) {
+        return true;
+    }
+
+    taddr = tcg_temp_new();
+
+    gen_base_offset_addr(ctx, taddr, a->ws, a->sa << a->df);
+    gen_msa_ldst(cpu_env, tcg_constant_i32(a->wd), taddr);
+
+    tcg_temp_free(taddr);
+
+    return true;
+}
+
+TRANS_DF_iv(LD, trans_msa_ldst, gen_helper_msa_ld);
+TRANS_DF_iv(ST, trans_msa_ldst, gen_helper_msa_st);
+
 static bool trans_LSA(DisasContext *ctx, arg_r *a)
 {
     return gen_lsa(ctx, a->rd, a->rt, a->rs, a->sa);
-- 
2.31.1