diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2017-11-06 21:10:33 +0100 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2018-01-31 05:30:49 -0800 |
| commit | 494737b7a24b39f3a2d537180af2a2880a0817fb (patch) | |
| tree | 0e63ca72478558b7ff5579599ca990aad4483380 /target/hppa/cpu.h | |
| parent | 6210db057a6f255f8d5caff1507f14185526df7a (diff) | |
| download | qemu-494737b7a24b39f3a2d537180af2a2880a0817fb.tar.gz | |
target/hppa: Optimize for flat addressing space
Linux sets sr4-sr7 all to the same value, which means that we
need not do any runtime computation to find out what space to
use in forming the GVA.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'target/hppa/cpu.h')
| -rw-r--r-- | target/hppa/cpu.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/target/hppa/cpu.h b/target/hppa/cpu.h index 54f11d4e18..40700f8425 100644 --- a/target/hppa/cpu.h +++ b/target/hppa/cpu.h @@ -282,7 +282,11 @@ static inline target_ulong hppa_form_gva(CPUHPPAState *env, uint64_t spc, return hppa_form_gva_psw(env->psw, spc, off); } -/* Since PSW_CB will never need to be in tb->flags, reuse them. */ +/* Since PSW_{I,CB} will never need to be in tb->flags, reuse them. + * TB_FLAG_SR_SAME indicates that SR4 through SR7 all contain the + * same value. + */ +#define TB_FLAG_SR_SAME PSW_I #define TB_FLAG_PRIV_SHIFT 8 static inline void cpu_get_tb_cpu_state(CPUHPPAState *env, target_ulong *pc, @@ -318,6 +322,11 @@ static inline void cpu_get_tb_cpu_state(CPUHPPAState *env, target_ulong *pc, *cs_base |= (uint32_t)diff; } } + if ((env->sr[4] == env->sr[5]) + & (env->sr[4] == env->sr[6]) + & (env->sr[4] == env->sr[7])) { + flags |= TB_FLAG_SR_SAME; + } #endif *pflags = flags; |