diff options
| author | pbrook <pbrook@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-10-22 16:14:08 +0000 |
|---|---|---|
| committer | pbrook <pbrook@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-10-22 16:14:08 +0000 |
| commit | 4be27dbbde2aed1da305b83043caa6f0f0ca4309 (patch) | |
| tree | 77aad647b51e997dca13a69511a47a369bbc5ffe | |
| parent | 3a742b76431e3dd2ee046aa56317ad36a903db30 (diff) | |
Optimize redundant cp15 coprocessor access control register writes.
Signed-off-by: Paul Brook <paul@codesourcery.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5512 c046a42c-6fe2-441c-8c8c-71466251a162
| -rw-r--r-- | target-arm/helper.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/target-arm/helper.c b/target-arm/helper.c index b9a8f78b2c..d4af8595ca 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -1334,9 +1334,11 @@ void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val) case 2: if (arm_feature(env, ARM_FEATURE_XSCALE)) goto bad_reg; - env->cp15.c1_coproc = val; - /* ??? Is this safe when called from within a TB? */ - tb_flush(env); + if (env->cp15.c1_coproc != val) { + env->cp15.c1_coproc = val; + /* ??? Is this safe when called from within a TB? */ + tb_flush(env); + } break; default: goto bad_reg; |