target/sparc: Move SETHI to decodetree

Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Acked-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
qemu · Oct 25, 2023 · 6d2a076 · 6d2a076
1 parent 9d4e2bc
commit 6d2a076
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Showing 2 changed files with 21 additions and 35 deletions.
diff --git a/target/sparc/insns.decode b/target/sparc/insns.decode
@@ -3,6 +3,10 @@
 # Sparc instruction decode definitions.
 # Copyright (c) 2023 Richard Henderson <rth@twiddle.net>
 
+##
+## Major Opcodes 00 and 01 -- branches, call, and sethi.
+##
+
 &bcc    i a cond cc
 BPcc    00 a:1 cond:4   001 cc:1 0 - i:s19                 &bcc
 Bicc    00 a:1 cond:4   010          i:s22                 &bcc cc=0
@@ -14,4 +18,6 @@ BPr     00 a:1 0 cond:3 011 ..     - rs1:5 ..............  i=%d16
 
 NCP     00 -   ----     111 ----------------------         # CBcc
 
+SETHI   00 rd:5         100 i:22
+
 CALL    01 i:s30
diff --git a/target/sparc/translate.c b/target/sparc/translate.c
@@ -2873,6 +2873,10 @@ static bool advance_pc(DisasContext *dc)
     return true;
 }
 
+/*
+ * Major opcodes 00 and 01 -- branches, call, and sethi
+ */
+
 static bool advance_jump_uncond_never(DisasContext *dc, bool annul)
 {
     if (annul) {
@@ -3029,6 +3033,15 @@ static bool trans_NCP(DisasContext *dc, arg_NCP *a)
 #endif
 }
 
+static bool trans_SETHI(DisasContext *dc, arg_SETHI *a)
+{
+    /* Special-case %g0 because that's the canonical nop.  */
+    if (a->rd) {
+        gen_store_gpr(dc, a->rd, tcg_constant_tl((uint32_t)a->i << 10));
+    }
+    return advance_pc(dc);
+}
+
 #define CHECK_IU_FEATURE(dc, FEATURE)                      \
     if (!((dc)->def->features & CPU_FEATURE_ ## FEATURE))  \
         goto illegal_insn;
@@ -3049,41 +3062,8 @@ static void disas_sparc_legacy(DisasContext *dc, unsigned int insn)
     rd = GET_FIELD(insn, 2, 6);
 
     switch (opc) {
-    case 0:                     /* branches/sethi */
-        {
-            unsigned int xop = GET_FIELD(insn, 7, 9);
-            switch (xop) {
-#ifdef TARGET_SPARC64
-            case 0x1:           /* V9 BPcc */
-                g_assert_not_reached(); /* in decodetree */
-            case 0x3:           /* V9 BPr */
-                g_assert_not_reached(); /* in decodetree */
-            case 0x5:           /* V9 FBPcc */
-                g_assert_not_reached(); /* in decodetree */
-#else
-            case 0x7:           /* CBN+x */
-                g_assert_not_reached(); /* in decodetree */
-#endif
-            case 0x2:           /* BN+x */
-                g_assert_not_reached(); /* in decodetree */
-            case 0x6:           /* FBN+x */
-                g_assert_not_reached(); /* in decodetree */
-            case 0x4:           /* SETHI */
-                /* Special-case %g0 because that's the canonical nop.  */
-                if (rd) {
-                    uint32_t value = GET_FIELD(insn, 10, 31);
-                    TCGv t = gen_dest_gpr(dc, rd);
-                    tcg_gen_movi_tl(t, value << 10);
-                    gen_store_gpr(dc, rd, t);
-                }
-                break;
-            case 0x0:           /* UNIMPL */
-            default:
-                goto illegal_insn;
-            }
-            break;
-        }
-        break;
+    case 0:
+        goto illegal_insn; /* in decodetree */
     case 1:
         g_assert_not_reached(); /* in decodetree */
     case 2:                     /* FPU & Logical Operations */