target/ppc: implement plxsd/pstxsd

Implement instructions plxsd/pstxsd and port lxsd/stxsd to decode
tree.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Leandro Lupori <leandro.lupori@eldorado.org.br>
Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Message-Id: <20220225210936.1749575-48-matheus.ferst@eldorado.org.br>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

4 files changed, 67 insertions, 14 deletions

diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode
index fede42f..37b6470 100644
--- a/target/ppc/insn32.decode
+++ b/target/ppc/insn32.decode
@@ -602,6 +602,8 @@ VCLRRB          000100 ..... ..... ..... 00111001101    @VX
 
 # VSX Load/Store Instructions
 
+LXSD            111001 ..... ..... .............. 10    @DS
+STXSD           111101 ..... ..... .............. 10    @DS
 LXV             111101 ..... ..... ............ . 001   @DQ_TSX
 STXV            111101 ..... ..... ............ . 101   @DQ_TSX
 LXVP            000110 ..... ..... ............ 0000    @DQ_TSXP
diff --git a/target/ppc/insn64.decode b/target/ppc/insn64.decode
index fdb859f..b7426f5 100644
--- a/target/ppc/insn64.decode
+++ b/target/ppc/insn64.decode
@@ -32,6 +32,10 @@
                 ...... ..... ra:5 ................       \
                 &PLS_D si=%pls_si rt=%rt_tsxp
 
+@8LS_D          ...... .. . .. r:1 .. .................. \
+                ...... rt:5 ra:5 ................        \
+                &PLS_D si=%pls_si
+
 # Format 8RR:D
 %8rr_si         32:s16 0:16
 %8rr_xt         16:1 21:5
@@ -180,6 +184,12 @@ PSTFD           000001 10 0--.-- .................. \
 
 ### VSX instructions
 
+PLXSD           000001 00 0--.-- .................. \
+                101010 ..... ..... ................     @8LS_D
+
+PSTXSD          000001 00 0--.-- .................. \
+                101110 ..... ..... ................     @8LS_D
+
 PLXV            000001 00 0--.-- .................. \
                 11001 ...... ..... ................     @8LS_D_TSX
 PSTXV           000001 00 0--.-- .................. \
diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index b46a113..1ef2eee 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -6668,7 +6668,7 @@ static bool resolve_PLS_D(DisasContext *ctx, arg_D *d, arg_PLS_D *a)
 
 #include "translate/branch-impl.c.inc"
 
-/* Handles lfdp, lxsd, lxssp */
+/* Handles lfdp, lxssp */
 static void gen_dform39(DisasContext *ctx)
 {
     switch (ctx->opcode & 0x3) {
@@ -6677,11 +6677,6 @@ static void gen_dform39(DisasContext *ctx)
             return gen_lfdp(ctx);
         }
         break;
-    case 2: /* lxsd */
-        if (ctx->insns_flags2 & PPC2_ISA300) {
-            return gen_lxsd(ctx);
-        }
-        break;
     case 3: /* lxssp */
         if (ctx->insns_flags2 & PPC2_ISA300) {
             return gen_lxssp(ctx);
@@ -6691,7 +6686,7 @@ static void gen_dform39(DisasContext *ctx)
     return gen_invalid(ctx);
 }
 
-/* handles stfdp, lxv, stxsd, stxssp lxvx */
+/* handles stfdp, lxv, stxssp lxvx */
 static void gen_dform3D(DisasContext *ctx)
 {
     if ((ctx->opcode & 3) != 1) { /* DS-FORM */
@@ -6701,11 +6696,6 @@ static void gen_dform3D(DisasContext *ctx)
                 return gen_stfdp(ctx);
             }
             break;
-        case 2: /* stxsd */
-            if (ctx->insns_flags2 & PPC2_ISA300) {
-                return gen_stxsd(ctx);
-            }
-            break;
         case 3: /* stxssp */
             if (ctx->insns_flags2 & PPC2_ISA300) {
                 return gen_stxssp(ctx);
diff --git a/target/ppc/translate/vsx-impl.c.inc b/target/ppc/translate/vsx-impl.c.inc
index 0344c47..a6e9417 100644
--- a/target/ppc/translate/vsx-impl.c.inc
+++ b/target/ppc/translate/vsx-impl.c.inc
@@ -309,7 +309,6 @@ static void gen_##name(DisasContext *ctx)                         \
     tcg_temp_free_i64(xth);                                       \
 }
 
-VSX_LOAD_SCALAR_DS(lxsd, ld64_i64)
 VSX_LOAD_SCALAR_DS(lxssp, ld32fs)
 
 #define VSX_STORE_SCALAR(name, operation)                     \
@@ -482,7 +481,6 @@ static void gen_##name(DisasContext *ctx)                         \
     tcg_temp_free_i64(xth);                                       \
 }
 
-VSX_STORE_SCALAR_DS(stxsd, st64_i64)
 VSX_STORE_SCALAR_DS(stxssp, st32fs)
 
 static void gen_mfvsrwz(DisasContext *ctx)
@@ -2298,6 +2296,57 @@ static bool do_lstxv_X(DisasContext *ctx, arg_X *a, bool store, bool paired)
     return do_lstxv(ctx, a->ra, cpu_gpr[a->rb], a->rt, store, paired);
 }
 
+static bool do_lstxsd(DisasContext *ctx, int rt, int ra, TCGv displ, bool store)
+{
+    TCGv ea;
+    TCGv_i64 xt;
+    MemOp mop;
+
+    if (store) {
+        REQUIRE_VECTOR(ctx);
+    } else {
+        REQUIRE_VSX(ctx);
+    }
+
+    xt = tcg_temp_new_i64();
+    mop = DEF_MEMOP(MO_UQ);
+
+    gen_set_access_type(ctx, ACCESS_INT);
+    ea = do_ea_calc(ctx, ra, displ);
+
+    if (store) {
+        get_cpu_vsr(xt, rt + 32, true);
+        tcg_gen_qemu_st_i64(xt, ea, ctx->mem_idx, mop);
+    } else {
+        tcg_gen_qemu_ld_i64(xt, ea, ctx->mem_idx, mop);
+        set_cpu_vsr(rt + 32, xt, true);
+        set_cpu_vsr(rt + 32, tcg_constant_i64(0), false);
+    }
+
+    tcg_temp_free(ea);
+    tcg_temp_free_i64(xt);
+
+    return true;
+}
+
+static bool do_lstxsd_DS(DisasContext *ctx, arg_D *a, bool store)
+{
+    return do_lstxsd(ctx, a->rt, a->ra, tcg_constant_tl(a->si), store);
+}
+
+static bool do_plstxsd_PLS_D(DisasContext *ctx, arg_PLS_D *a, bool store)
+{
+    arg_D d;
+
+    if (!resolve_PLS_D(ctx, &d, a)) {
+        return true;
+    }
+
+    return do_lstxsd(ctx, d.rt, d.ra, tcg_constant_tl(d.si), store);
+}
+
+TRANS_FLAGS2(ISA300, LXSD, do_lstxsd_DS, false)
+TRANS_FLAGS2(ISA300, STXSD, do_lstxsd_DS, true)
 TRANS_FLAGS2(ISA300, STXV, do_lstxv_D, true, false)
 TRANS_FLAGS2(ISA300, LXV, do_lstxv_D, false, false)
 TRANS_FLAGS2(ISA310, STXVP, do_lstxv_D, true, true)
@@ -2306,6 +2355,8 @@ TRANS_FLAGS2(ISA300, STXVX, do_lstxv_X, true, false)
 TRANS_FLAGS2(ISA300, LXVX, do_lstxv_X, false, false)
 TRANS_FLAGS2(ISA310, STXVPX, do_lstxv_X, true, true)
 TRANS_FLAGS2(ISA310, LXVPX, do_lstxv_X, false, true)
+TRANS64_FLAGS2(ISA310, PLXSD, do_plstxsd_PLS_D, false)
+TRANS64_FLAGS2(ISA310, PSTXSD, do_plstxsd_PLS_D, true)
 TRANS64_FLAGS2(ISA310, PSTXV, do_lstxv_PLS_D, true, false)
 TRANS64_FLAGS2(ISA310, PLXV, do_lstxv_PLS_D, false, false)
 TRANS64_FLAGS2(ISA310, PSTXVP, do_lstxv_PLS_D, true, true)