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[Qemu-devel] [PATCH v6 09/25] target/i386: optimize cross-page direct ju
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH v6 09/25] target/i386: optimize cross-page direct jumps in softmmu |
Date: |
Tue, 2 May 2017 12:22:44 -0700 |
From: "Emilio G. Cota" <address@hidden>
Instead of unconditionally exiting to the exec loop, use the
gen_jr helper to jump to the target if it is valid.
Perf impact: see next commit's log.
Reviewed-by: Richard Henderson <address@hidden>
Signed-off-by: Emilio G. Cota <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
target/i386/translate.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/target/i386/translate.c b/target/i386/translate.c
index f0e48dc..ea113fe 100644
--- a/target/i386/translate.c
+++ b/target/i386/translate.c
@@ -2154,9 +2154,9 @@ static inline void gen_goto_tb(DisasContext *s, int
tb_num, target_ulong eip)
gen_jmp_im(eip);
tcg_gen_exit_tb((uintptr_t)s->tb + tb_num);
} else {
- /* jump to another page: currently not optimized */
+ /* jump to another page */
gen_jmp_im(eip);
- gen_eob(s);
+ gen_jr(s, cpu_tmp0);
}
}
--
2.9.3
- [Qemu-devel] [PATCH v6 00/25] tcg cross-tb optimizations, Richard Henderson, 2017/05/02
- [Qemu-devel] [PATCH v6 01/25] target/nios2: Fix 64-bit ilp32 compilation, Richard Henderson, 2017/05/02
- [Qemu-devel] [PATCH v6 02/25] tcg/sparc: Use the proper compilation flags for 32-bit, Richard Henderson, 2017/05/02
- [Qemu-devel] [PATCH v6 03/25] qemu/atomic: Loosen restrictions for 64-bit ILP32 hosts, Richard Henderson, 2017/05/02
- [Qemu-devel] [PATCH v6 05/25] tcg/i386: implement goto_ptr, Richard Henderson, 2017/05/02
- [Qemu-devel] [PATCH v6 06/25] target/arm: optimize cross-page direct jumps in softmmu, Richard Henderson, 2017/05/02
- [Qemu-devel] [PATCH v6 07/25] target/arm: optimize indirect branches, Richard Henderson, 2017/05/02
- [Qemu-devel] [PATCH v6 04/25] tcg: Introduce goto_ptr opcode and tcg_gen_lookup_and_goto_ptr, Richard Henderson, 2017/05/02
- [Qemu-devel] [PATCH v6 09/25] target/i386: optimize cross-page direct jumps in softmmu,
Richard Henderson <=
- [Qemu-devel] [PATCH v6 08/25] target/i386: introduce gen_jr helper to generate lookup_and_goto_ptr, Richard Henderson, 2017/05/02
- [Qemu-devel] [PATCH v6 10/25] target/i386: optimize indirect branches, Richard Henderson, 2017/05/02
- [Qemu-devel] [PATCH v6 12/25] tcg/ppc: Implement goto_ptr, Richard Henderson, 2017/05/02
- [Qemu-devel] [PATCH v6 15/25] tcg/s390: Implement goto_ptr, Richard Henderson, 2017/05/02
- [Qemu-devel] [PATCH v6 13/25] tcg/aarch64: Implement goto_ptr, Richard Henderson, 2017/05/02
- [Qemu-devel] [PATCH v6 11/25] tb-hash: improve tb_jmp_cache hash function in user mode, Richard Henderson, 2017/05/02
- [Qemu-devel] [PATCH v6 17/25] tcg/arm: Implement goto_ptr, Richard Henderson, 2017/05/02
- [Qemu-devel] [PATCH v6 14/25] tcg/sparc: Implement goto_ptr, Richard Henderson, 2017/05/02