target/mips: Rename sa16 -> sa, bz_df -> bz -> bz_v

This 'shift amount' format is not always 16-bit, so name it
generically as 'sa'. This will help to unify the various
arg_msa decodetree generated structures.

Rename the @bz format -> @bz_v (specific @bz with df=3) and
@bz_df -> @bz (generic @bz).

Since we modify &msa_bz, re-align its arguments, so the other
structures added in the following commits stay visually aligned.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20211028210843.2120802-8-f4bug@amsat.org>

2 files changed, 17 insertions, 18 deletions

diff --git a/target/mips/tcg/msa.decode b/target/mips/tcg/msa.decode
index 74d99f6..56419a2 100644
--- a/target/mips/tcg/msa.decode
+++ b/target/mips/tcg/msa.decode
@@ -13,19 +13,18 @@
 
 &r                  rs rt rd sa
 
-&msa_bz             df wt s16
+&msa_bz             df        wt sa
 
 @lsa                ...... rs:5 rt:5 rd:5 ... sa:2 ......   &r
-@bz                 ...... ... ..   wt:5 s16:16             &msa_bz df=3
-@bz_df              ...... ... df:2 wt:5 s16:16             &msa_bz
+@bz_v               ...... ... ..    wt:5 sa:16             &msa_bz df=3
+@bz                 ...... ...  df:2 wt:5 sa:16             &msa_bz
 
 LSA                 000000 ..... ..... ..... 000 .. 000101  @lsa
 DLSA                000000 ..... ..... ..... 000 .. 010101  @lsa
 
-BZ_V                010001 01011  ..... ................    @bz
-BNZ_V               010001 01111  ..... ................    @bz
-
-BZ_x                010001 110 .. ..... ................    @bz_df
-BNZ_x               010001 111 .. ..... ................    @bz_df
+BZ_V                010001 01011  ..... ................    @bz_v
+BNZ_V               010001 01111  ..... ................    @bz_v
+BZ                  010001 110 .. ..... ................    @bz
+BNZ                 010001 111 .. ..... ................    @bz
 
 MSA                 011110 --------------------------
diff --git a/target/mips/tcg/msa_translate.c b/target/mips/tcg/msa_translate.c
index 56a0148..8311730 100644
--- a/target/mips/tcg/msa_translate.c
+++ b/target/mips/tcg/msa_translate.c
@@ -340,7 +340,7 @@ static void gen_check_zero_element(TCGv tresult, uint8_t df, uint8_t wt,
     tcg_temp_free_i64(t1);
 }
 
-static bool gen_msa_BxZ_V(DisasContext *ctx, int wt, int s16, TCGCond cond)
+static bool gen_msa_BxZ_V(DisasContext *ctx, int wt, int sa, TCGCond cond)
 {
     TCGv_i64 t0;
 
@@ -358,7 +358,7 @@ static bool gen_msa_BxZ_V(DisasContext *ctx, int wt, int s16, TCGCond cond)
     tcg_gen_trunc_i64_tl(bcond, t0);
     tcg_temp_free_i64(t0);
 
-    ctx->btarget = ctx->base.pc_next + (s16 << 2) + 4;
+    ctx->btarget = ctx->base.pc_next + (sa << 2) + 4;
 
     ctx->hflags |= MIPS_HFLAG_BC;
     ctx->hflags |= MIPS_HFLAG_BDS32;
@@ -368,15 +368,15 @@ static bool gen_msa_BxZ_V(DisasContext *ctx, int wt, int s16, TCGCond cond)
 
 static bool trans_BZ_V(DisasContext *ctx, arg_msa_bz *a)
 {
-    return gen_msa_BxZ_V(ctx, a->wt, a->s16, TCG_COND_EQ);
+    return gen_msa_BxZ_V(ctx, a->wt, a->sa, TCG_COND_EQ);
 }
 
 static bool trans_BNZ_V(DisasContext *ctx, arg_msa_bz *a)
 {
-    return gen_msa_BxZ_V(ctx, a->wt, a->s16, TCG_COND_NE);
+    return gen_msa_BxZ_V(ctx, a->wt, a->sa, TCG_COND_NE);
 }
 
-static bool gen_msa_BxZ(DisasContext *ctx, int df, int wt, int s16, bool if_not)
+static bool gen_msa_BxZ(DisasContext *ctx, int df, int wt, int sa, bool if_not)
 {
     if (!check_msa_enabled(ctx)) {
         return true;
@@ -389,21 +389,21 @@ static bool gen_msa_BxZ(DisasContext *ctx, int df, int wt, int s16, bool if_not)
 
     gen_check_zero_element(bcond, df, wt, if_not ? TCG_COND_EQ : TCG_COND_NE);
 
-    ctx->btarget = ctx->base.pc_next + (s16 << 2) + 4;
+    ctx->btarget = ctx->base.pc_next + (sa << 2) + 4;
     ctx->hflags |= MIPS_HFLAG_BC;
     ctx->hflags |= MIPS_HFLAG_BDS32;
 
     return true;
 }
 
-static bool trans_BZ_x(DisasContext *ctx, arg_msa_bz *a)
+static bool trans_BZ(DisasContext *ctx, arg_msa_bz *a)
 {
-    return gen_msa_BxZ(ctx, a->df, a->wt, a->s16, false);
+    return gen_msa_BxZ(ctx, a->df, a->wt, a->sa, false);
 }
 
-static bool trans_BNZ_x(DisasContext *ctx, arg_msa_bz *a)
+static bool trans_BNZ(DisasContext *ctx, arg_msa_bz *a)
 {
-    return gen_msa_BxZ(ctx, a->df, a->wt, a->s16, true);
+    return gen_msa_BxZ(ctx, a->df, a->wt, a->sa, true);
 }
 
 static void gen_msa_i8(DisasContext *ctx)