[Qemu-devel] [PATCH 2/3] m68k: implement move to/from usp register instruction

[gerg@uclinux.org]

From: Greg Ungerer <gerg@uclinux.org>

Fill out the code support for the move to/from usp instructions. They are
being decoded, but there is no code to support there actions. So add it.

Current versions of Linux running on the ColdFire 5208 use these instructions.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
---
 target-m68k/translate.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/target-m68k/translate.c b/target-m68k/translate.c
index efd4cfc..5a6666a 100644
--- a/target-m68k/translate.c
+++ b/target-m68k/translate.c
@@ -1995,8 +1995,8 @@ DISAS_INSN(move_from_usp)
         gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
         return;
     }
-    /* TODO: Implement USP.  */
-    gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
+    tcg_gen_ld_i32(AREG(insn, 0), cpu_env,
+                   offsetof(CPUM68KState, sp[M68K_USP]));
 }
 
 DISAS_INSN(move_to_usp)
@@ -2005,8 +2005,8 @@ DISAS_INSN(move_to_usp)
         gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
         return;
     }
-    /* TODO: Implement USP.  */
-    gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
+    tcg_gen_st_i32(AREG(insn, 0), cpu_env,
+                   offsetof(CPUM68KState, sp[M68K_USP]));
 }
 
 DISAS_INSN(halt)
-- 
1.9.1