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From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Cc: Richard Henderson <richard.henderson@linaro.org>
Subject: [PULL 10/24] target/i386: avoid calling gen_eob_inhibit_irq before tb_stop
Date: Sat, 25 May 2024 13:33:18 +0200	[thread overview]
Message-ID: <20240525113332.1404158-11-pbonzini@redhat.com> (raw)
In-Reply-To: <20240525113332.1404158-1-pbonzini@redhat.com>

sti only has one exit, so it does not need to generate the
end-of-translation code inline.  It can be deferred to tb_stop.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/tcg/translate.c | 13 -------------
 target/i386/tcg/emit.c.inc  |  4 +---
 2 files changed, 1 insertion(+), 16 deletions(-)

diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index 06aaaa00b43..a7493b5ccfd 100644
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -564,19 +564,6 @@ static void gen_update_eip_cur(DisasContext *s)
     s->pc_save = s->base.pc_next;
 }
 
-static void gen_update_eip_next(DisasContext *s)
-{
-    assert(s->pc_save != -1);
-    if (tb_cflags(s->base.tb) & CF_PCREL) {
-        tcg_gen_addi_tl(cpu_eip, cpu_eip, s->pc - s->pc_save);
-    } else if (CODE64(s)) {
-        tcg_gen_movi_tl(cpu_eip, s->pc);
-    } else {
-        tcg_gen_movi_tl(cpu_eip, (uint32_t)(s->pc - s->cs_base));
-    }
-    s->pc_save = s->pc;
-}
-
 static int cur_insn_len(DisasContext *s)
 {
     return s->pc - s->base.pc_next;
diff --git a/target/i386/tcg/emit.c.inc b/target/i386/tcg/emit.c.inc
index e0ac21abe28..88bcb9699c3 100644
--- a/target/i386/tcg/emit.c.inc
+++ b/target/i386/tcg/emit.c.inc
@@ -3475,9 +3475,7 @@ static void gen_STD(DisasContext *s, CPUX86State *env, X86DecodedInsn *decode)
 static void gen_STI(DisasContext *s, CPUX86State *env, X86DecodedInsn *decode)
 {
     gen_set_eflags(s, IF_MASK);
-    /* interruptions are enabled only the first insn after sti */
-    gen_update_eip_next(s);
-    gen_eob_inhibit_irq(s);
+    s->base.is_jmp = DISAS_EOB_INHIBIT_IRQ;
 }
 
 static void gen_VAESKEYGEN(DisasContext *s, CPUX86State *env, X86DecodedInsn *decode)
-- 
2.45.1



  parent reply	other threads:[~2024-05-25 11:37 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-05-25 11:33 [PULL 00/24] Build system and target/i386/translate.c cleanups for 2025-05-25 Paolo Bonzini
2024-05-25 11:33 ` [PULL 01/24] configure: move -mcx16 flag out of CPU_CFLAGS Paolo Bonzini
2024-10-04 16:08   ` Alex Bennée
2024-10-04 22:42     ` Pierrick Bouvier
2024-05-25 11:33 ` [PULL 02/24] target/i386: disable jmp_opt if EFLAGS.RF is 1 Paolo Bonzini
2024-05-25 11:33 ` [PULL 03/24] target/i386: no single-step exception after MOV or POP SS Paolo Bonzini
2024-05-25 11:33 ` [PULL 04/24] target/i386: cleanup eob handling of RSM Paolo Bonzini
2024-05-25 11:33 ` [PULL 05/24] target/i386: remove unnecessary gen_update_cc_op before gen_eob* Paolo Bonzini
2024-05-25 11:33 ` [PULL 06/24] target/i386: cpu_load_eflags already sets cc_op Paolo Bonzini
2024-05-25 11:33 ` [PULL 07/24] target/i386: set CC_OP in helpers if they want CC_OP_EFLAGS Paolo Bonzini
2024-05-25 11:33 ` [PULL 08/24] target/i386: document and group DISAS_* constants Paolo Bonzini
2024-05-25 11:33 ` [PULL 09/24] target/i386: avoid calling gen_eob_syscall before tb_stop Paolo Bonzini
2024-05-25 11:33 ` Paolo Bonzini [this message]
2024-05-25 11:33 ` [PULL 11/24] target/i386: assert that gen_update_eip_cur and gen_update_eip_next are the same in tb_stop Paolo Bonzini
2024-05-25 11:33 ` [PULL 12/24] target/i386: raze the gen_eob* jungle Paolo Bonzini
2024-05-25 11:33 ` [PULL 13/24] target/i386: reg in gen_ldst_modrm is always OR_TMP0 Paolo Bonzini
2024-05-25 11:33 ` [PULL 14/24] target/i386: split gen_ldst_modrm for load and store Paolo Bonzini
2024-05-25 11:33 ` [PULL 15/24] target/i386: inline gen_add_A0_ds_seg Paolo Bonzini
2024-05-25 11:33 ` [PULL 16/24] target/i386: use mo_stacksize more Paolo Bonzini
2024-05-25 11:33 ` [PULL 17/24] target/i386: introduce gen_lea_ss_ofs Paolo Bonzini
2024-05-25 11:33 ` [PULL 18/24] target/i386: clean up repeated string operations Paolo Bonzini
2024-05-25 11:33 ` [PULL 19/24] target/i386: remove aflag argument of gen_lea_v_seg Paolo Bonzini
2024-05-25 11:33 ` [PULL 20/24] meson: remove unnecessary reference to libm Paolo Bonzini
2024-05-25 11:33 ` [PULL 21/24] meson: remove unnecessary dependency Paolo Bonzini
2024-05-25 11:33 ` [PULL 22/24] tcg: include dependencies in static_library() Paolo Bonzini
2024-05-25 11:33 ` [PULL 23/24] meson: do not query modules before they are processed Paolo Bonzini
2024-05-25 11:33 ` [PULL 24/24] migration: remove unnecessary zlib dependency Paolo Bonzini
2024-05-26  1:34 ` [PULL 00/24] Build system and target/i386/translate.c cleanups for 2025-05-25 Richard Henderson

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