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[PULL 20/41] target/mips: Convert MSA VEC instruction format to decodetr


From: Philippe Mathieu-Daudé
Subject: [PULL 20/41] target/mips: Convert MSA VEC instruction format to decodetree
Date: Tue, 2 Nov 2021 14:42:19 +0100

Convert 3-register instructions with implicit data formats
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: <20211028210843.2120802-18-f4bug@amsat.org>
---
 target/mips/tcg/msa.decode      |  8 +++
 target/mips/tcg/msa_translate.c | 98 ++++++++-------------------------
 2 files changed, 31 insertions(+), 75 deletions(-)

diff --git a/target/mips/tcg/msa.decode b/target/mips/tcg/msa.decode
index b6ac80560f6..afcb868aade 100644
--- a/target/mips/tcg/msa.decode
+++ b/target/mips/tcg/msa.decode
@@ -27,6 +27,7 @@
 @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
+@vec                ...... .....     wt:5 ws:5 wd:5 ......  &msa_r df=0
 @2r                 ...... ........  df:2 ws:5 wd:5 ......  &msa_r wt=0
 @2rf                ...... ......... .    ws:5 wd:5 ......  &msa_r wt=0 
df=%2r_df_w
 @u5                 ...... ... df:2 sa:5  ws:5 wd:5 ......  &msa_i
@@ -83,6 +84,13 @@ BNZ                 010001 111 .. ..... ................    
@bz
   SRARI             011110 010 ....... ..... .....  001010  @bit
   SRLRI             011110 011 ....... ..... .....  001010  @bit
 
+  AND_V             011110 00000 ..... ..... .....  011110  @vec
+  OR_V              011110 00001 ..... ..... .....  011110  @vec
+  NOR_V             011110 00010 ..... ..... .....  011110  @vec
+  XOR_V             011110 00011 ..... ..... .....  011110  @vec
+  BMNZ_V            011110 00100 ..... ..... .....  011110  @vec
+  BMZ_V             011110 00101 ..... ..... .....  011110  @vec
+  BSEL_V            011110 00110 ..... ..... .....  011110  @vec
   FILL              011110 11000000 .. ..... .....  011110  @2r
   PCNT              011110 11000001 .. ..... .....  011110  @2r
   NLOC              011110 11000010 .. ..... .....  011110  @2r
diff --git a/target/mips/tcg/msa_translate.c b/target/mips/tcg/msa_translate.c
index c6e38281a64..45a6b60d547 100644
--- a/target/mips/tcg/msa_translate.c
+++ b/target/mips/tcg/msa_translate.c
@@ -45,19 +45,9 @@ enum {
     OPC_MSA_3RF_1A  = 0x1A | OPC_MSA,
     OPC_MSA_3RF_1B  = 0x1B | OPC_MSA,
     OPC_MSA_3RF_1C  = 0x1C | OPC_MSA,
-    OPC_MSA_VEC     = 0x1E | OPC_MSA,
 };
 
 enum {
-    /* VEC instruction */
-    OPC_AND_V       = (0x00 << 21) | OPC_MSA_VEC,
-    OPC_OR_V        = (0x01 << 21) | OPC_MSA_VEC,
-    OPC_NOR_V       = (0x02 << 21) | OPC_MSA_VEC,
-    OPC_XOR_V       = (0x03 << 21) | OPC_MSA_VEC,
-    OPC_BMNZ_V      = (0x04 << 21) | OPC_MSA_VEC,
-    OPC_BMZ_V       = (0x05 << 21) | OPC_MSA_VEC,
-    OPC_BSEL_V      = (0x06 << 21) | OPC_MSA_VEC,
-
     /* 3R instruction df(bits 22..21) = _b, _h, _w, d */
     OPC_SLL_df      = (0x0 << 23) | OPC_MSA_3R_0D,
     OPC_ADDV_df     = (0x0 << 23) | OPC_MSA_3R_0E,
@@ -517,6 +507,29 @@ TRANS(SAT_U,    trans_msa_bit, gen_helper_msa_sat_u_df);
 TRANS(SRARI,    trans_msa_bit, gen_helper_msa_srari_df);
 TRANS(SRLRI,    trans_msa_bit, gen_helper_msa_srlri_df);
 
+static bool trans_msa_3r(DisasContext *ctx, arg_msa_r *a,
+                         gen_helper_piii *gen_msa_3r)
+{
+    if (!check_msa_enabled(ctx)) {
+        return true;
+    }
+
+    gen_msa_3r(cpu_env,
+               tcg_constant_i32(a->wd),
+               tcg_constant_i32(a->ws),
+               tcg_constant_i32(a->wt));
+
+    return true;
+}
+
+TRANS(AND_V,            trans_msa_3r,   gen_helper_msa_and_v);
+TRANS(OR_V,             trans_msa_3r,   gen_helper_msa_or_v);
+TRANS(NOR_V,            trans_msa_3r,   gen_helper_msa_nor_v);
+TRANS(XOR_V,            trans_msa_3r,   gen_helper_msa_xor_v);
+TRANS(BMNZ_V,           trans_msa_3r,   gen_helper_msa_bmnz_v);
+TRANS(BMZ_V,            trans_msa_3r,   gen_helper_msa_bmz_v);
+TRANS(BSEL_V,           trans_msa_3r,   gen_helper_msa_bsel_v);
+
 static void gen_msa_3r(DisasContext *ctx)
 {
 #define MASK_MSA_3R(op)    (MASK_MSA_MINOR(op) | (op & (0x7 << 23)))
@@ -1899,68 +1912,6 @@ TRANS(FTINT_U,  trans_msa_2rf, 
gen_helper_msa_ftint_u_df);
 TRANS(FFINT_S,  trans_msa_2rf, gen_helper_msa_ffint_s_df);
 TRANS(FFINT_U,  trans_msa_2rf, gen_helper_msa_ffint_u_df);
 
-static void gen_msa_vec_v(DisasContext *ctx)
-{
-#define MASK_MSA_VEC(op)    (MASK_MSA_MINOR(op) | (op & (0x1f << 21)))
-    uint8_t wt = (ctx->opcode >> 16) & 0x1f;
-    uint8_t ws = (ctx->opcode >> 11) & 0x1f;
-    uint8_t wd = (ctx->opcode >> 6) & 0x1f;
-    TCGv_i32 twd = tcg_const_i32(wd);
-    TCGv_i32 tws = tcg_const_i32(ws);
-    TCGv_i32 twt = tcg_const_i32(wt);
-
-    switch (MASK_MSA_VEC(ctx->opcode)) {
-    case OPC_AND_V:
-        gen_helper_msa_and_v(cpu_env, twd, tws, twt);
-        break;
-    case OPC_OR_V:
-        gen_helper_msa_or_v(cpu_env, twd, tws, twt);
-        break;
-    case OPC_NOR_V:
-        gen_helper_msa_nor_v(cpu_env, twd, tws, twt);
-        break;
-    case OPC_XOR_V:
-        gen_helper_msa_xor_v(cpu_env, twd, tws, twt);
-        break;
-    case OPC_BMNZ_V:
-        gen_helper_msa_bmnz_v(cpu_env, twd, tws, twt);
-        break;
-    case OPC_BMZ_V:
-        gen_helper_msa_bmz_v(cpu_env, twd, tws, twt);
-        break;
-    case OPC_BSEL_V:
-        gen_helper_msa_bsel_v(cpu_env, twd, tws, twt);
-        break;
-    default:
-        MIPS_INVAL("MSA instruction");
-        gen_reserved_instruction(ctx);
-        break;
-    }
-
-    tcg_temp_free_i32(twd);
-    tcg_temp_free_i32(tws);
-    tcg_temp_free_i32(twt);
-}
-
-static void gen_msa_vec(DisasContext *ctx)
-{
-    switch (MASK_MSA_VEC(ctx->opcode)) {
-    case OPC_AND_V:
-    case OPC_OR_V:
-    case OPC_NOR_V:
-    case OPC_XOR_V:
-    case OPC_BMNZ_V:
-    case OPC_BMZ_V:
-    case OPC_BSEL_V:
-        gen_msa_vec_v(ctx);
-        break;
-    default:
-        MIPS_INVAL("MSA instruction");
-        gen_reserved_instruction(ctx);
-        break;
-    }
-}
-
 static bool trans_MSA(DisasContext *ctx, arg_MSA *a)
 {
     uint32_t opcode = ctx->opcode;
@@ -1989,9 +1940,6 @@ static bool trans_MSA(DisasContext *ctx, arg_MSA *a)
     case OPC_MSA_3RF_1C:
         gen_msa_3rf(ctx);
         break;
-    case OPC_MSA_VEC:
-        gen_msa_vec(ctx);
-        break;
     default:
         MIPS_INVAL("MSA instruction");
         gen_reserved_instruction(ctx);
-- 
2.31.1




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