target/sparc: Split out resolve_asi

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>

diff --git a/target/sparc/translate.c b/target/sparc/translate.c
index 8faf2c59b2bc5695a63e5a5ad843a36a09a27fa9..6c1610486e3ac49a7daa4a10176b6bf11d4c5a82 100644 (file)
--- a/target/sparc/translate.c
+++ b/target/sparc/translate.c
@@ -1919,15 +1919,25 @@ typedef struct {
     MemOp memop;
 } DisasASI;
 
-static DisasASI get_asi(DisasContext *dc, int insn, MemOp memop)
+/*
+ * Build DisasASI.
+ * For asi == -1, treat as non-asi.
+ * For ask == -2, treat as immediate offset (v8 error, v9 %asi).
+ */
+static DisasASI resolve_asi(DisasContext *dc, int asi, MemOp memop)
 {
-    int asi = GET_FIELD(insn, 19, 26);
     ASIType type = GET_ASI_HELPER;
     int mem_idx = dc->mem_idx;
 
+    if (asi == -1) {
+        /* Artificial "non-asi" case. */
+        type = GET_ASI_DIRECT;
+        goto done;
+    }
+
 #ifndef TARGET_SPARC64
     /* Before v9, all asis are immediate and privileged.  */
-    if (IS_IMM) {
+    if (asi < 0) {
         gen_exception(dc, TT_ILL_INSN);
         type = GET_ASI_EXCP;
     } else if (supervisor(dc)
@@ -1970,7 +1980,7 @@ static DisasASI get_asi(DisasContext *dc, int insn, MemOp memop)
         type = GET_ASI_EXCP;
     }
 #else
-    if (IS_IMM) {
+    if (asi < 0) {
         asi = dc->asi;
     }
     /* With v9, all asis below 0x80 are privileged.  */
@@ -2129,9 +2139,16 @@ static DisasASI get_asi(DisasContext *dc, int insn, MemOp memop)
     }
 #endif
 
+ done:
     return (DisasASI){ type, asi, mem_idx, memop };
 }
 
+static DisasASI get_asi(DisasContext *dc, int insn, MemOp memop)
+{
+    int asi = IS_IMM ? -2 : GET_FIELD(insn, 19, 26);
+    return resolve_asi(dc, asi, memop);
+}
+
 static void gen_ld_asi(DisasContext *dc, TCGv dst, TCGv addr,
                        int insn, MemOp memop)
 {