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Optimize redundant cp15 coprocessor access control register writes.

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Signed-off-by: Paul Brook <paul@codesourcery.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5512 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2008-10-22 16:14:08 +00:00
parent 3a742b7643
commit 4be27dbbde
1 changed files with 5 additions and 3 deletions
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8
target-arm/helper.c
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@ -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;