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[Qemu-devel] [PULL 06/26] target/arm: optimize cross-page direct jumps i
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PULL 06/26] target/arm: optimize cross-page direct jumps in softmmu |
Date: |
Mon, 5 Jun 2017 09:52:13 -0700 |
From: "Emilio G. Cota" <address@hidden>
Instead of unconditionally exiting to the exec loop, use the
lookup_and_goto_ptr helper to jump to the target if it is valid.
Perf impact: see next commit's log.
Reviewed-by: Alex Bennée <address@hidden>
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/arm/translate.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/target/arm/translate.c b/target/arm/translate.c
index ae6646c..d72953f 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -4157,8 +4157,12 @@ static inline void gen_goto_tb(DisasContext *s, int n,
target_ulong dest)
gen_set_pc_im(s, dest);
tcg_gen_exit_tb((uintptr_t)s->tb + n);
} else {
+ TCGv addr = tcg_temp_new();
+
gen_set_pc_im(s, dest);
- tcg_gen_exit_tb(0);
+ tcg_gen_extu_i32_tl(addr, cpu_R[15]);
+ tcg_gen_lookup_and_goto_ptr(addr);
+ tcg_temp_free(addr);
}
}
--
2.9.4
- [Qemu-devel] [PULL 00/26] tcg queued patches, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 01/26] target/nios2: Fix 64-bit ilp32 compilation, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 02/26] tcg/sparc: Use the proper compilation flags for 32-bit, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 03/26] qemu/atomic: Loosen restrictions for 64-bit ILP32 hosts, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 04/26] tcg: Introduce goto_ptr opcode and tcg_gen_lookup_and_goto_ptr, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 06/26] target/arm: optimize cross-page direct jumps in softmmu,
Richard Henderson <=
- [Qemu-devel] [PULL 05/26] tcg/i386: implement goto_ptr, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 08/26] target/i386: introduce gen_jr helper to generate lookup_and_goto_ptr, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 09/26] target/i386: optimize cross-page direct jumps in softmmu, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 07/26] target/arm: optimize indirect branches, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 10/26] target/i386: optimize indirect branches, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 12/26] tcg/ppc: Implement goto_ptr, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 14/26] tcg/sparc: Implement goto_ptr, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 13/26] tcg/aarch64: Implement goto_ptr, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 11/26] tb-hash: improve tb_jmp_cache hash function in user mode, Richard Henderson, 2017/06/05
- [Qemu-devel] [PULL 15/26] tcg/s390: Implement goto_ptr, Richard Henderson, 2017/06/05