[Qemu-devel] [PATCH v1 2/4] target-arm: A64: Handle blr lr

[Edgar E. Iglesias]

From: "Edgar E. Iglesias" <address@hidden>

For linked branches, updates to the link register happen
conceptually after the read of the branch target register.

Signed-off-by: Edgar E. Iglesias <address@hidden>
---
 target-arm/translate-a64.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c
index d86b8ff..0862e54 100644
--- a/target-arm/translate-a64.c
+++ b/target-arm/translate-a64.c
@@ -1507,8 +1507,10 @@ static void disas_uncond_b_reg(DisasContext *s, uint32_t 
insn)
     switch (opc) {
     case 0: /* BR */
     case 2: /* RET */
+        tcg_gen_mov_i64(cpu_pc, cpu_reg(s, rn));
         break;
     case 1: /* BLR */
+        tcg_gen_mov_i64(cpu_pc, cpu_reg(s, rn));
         tcg_gen_movi_i64(cpu_reg(s, 30), s->pc);
         break;
     case 4: /* ERET */
@@ -1527,7 +1529,6 @@ static void disas_uncond_b_reg(DisasContext *s, uint32_t 
insn)
         return;
     }
 
-    tcg_gen_mov_i64(cpu_pc, cpu_reg(s, rn));
     s->is_jmp = DISAS_JUMP;
 }
 
-- 
1.8.3.2