[PATCH v3 07/27] target/s390x: Change help_goto_direct to work on displacements

[Richard Henderson]

In preparation for TARGET_TB_PCREL, reduce reliance on absolute values.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/s390x/tcg/translate.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c
index 83805085a9..f13ea43ce9 100644
--- a/target/s390x/tcg/translate.c
+++ b/target/s390x/tcg/translate.c
@@ -1145,8 +1145,10 @@ struct DisasInsn {
 /* ====================================================================== */
 /* Miscellaneous helpers, used by several operations.  */
 
-static DisasJumpType help_goto_direct(DisasContext *s, uint64_t dest)
+static DisasJumpType help_goto_direct(DisasContext *s, int64_t disp)
 {
+    uint64_t dest = s->base.pc_next + disp;
+
     if (dest == s->pc_tmp) {
         per_branch(s, true);
         return DISAS_NEXT;
@@ -1169,7 +1171,8 @@ static DisasJumpType help_branch(DisasContext *s, 
DisasCompare *c,
                                  bool is_imm, int imm, TCGv_i64 cdest)
 {
     DisasJumpType ret;
-    uint64_t dest = s->base.pc_next + (int64_t)imm * 2;
+    int64_t disp = (int64_t)imm * 2;
+    uint64_t dest = s->base.pc_next + disp;
     TCGLabel *lab;
 
     /* Take care of the special cases first.  */
@@ -1185,7 +1188,7 @@ static DisasJumpType help_branch(DisasContext *s, 
DisasCompare *c,
             goto egress;
         }
         if (c->cond == TCG_COND_ALWAYS) {
-            ret = help_goto_direct(s, dest);
+            ret = help_goto_direct(s, disp);
             goto egress;
         }
     } else {
@@ -1558,7 +1561,7 @@ static DisasJumpType op_bal(DisasContext *s, DisasOps *o)
 static DisasJumpType op_basi(DisasContext *s, DisasOps *o)
 {
     pc_to_link_info(o->out, s, s->pc_tmp);
-    return help_goto_direct(s, s->base.pc_next + (int64_t)get_field(s, i2) * 
2);
+    return help_goto_direct(s, (int64_t)get_field(s, i2) * 2);
 }
 
 static DisasJumpType op_bc(DisasContext *s, DisasOps *o)
-- 
2.34.1