target/i386: Introduce DISAS_EOB*

Add a few DISAS_TARGET_* aliases to reduce the number of
calls to gen_eob() and gen_eob_inhibit_irq().  So far,
only update i386_tr_translate_insn for exiting the block
because of single-step or previous inhibit irq.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20221001140935.465607-8-richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index 4c1548da8e502d5207f5c6d56d220e64165f2e77..caa22af5a779206fa640dfaa31172160328ffef1 100644 (file)
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -132,6 +132,10 @@ typedef struct DisasContext {
     TCGOp *prev_insn_end;
 } DisasContext;
 
+#define DISAS_EOB_ONLY         DISAS_TARGET_0
+#define DISAS_EOB_NEXT         DISAS_TARGET_1
+#define DISAS_EOB_INHIBIT_IRQ  DISAS_TARGET_2
+
 /* The environment in which user-only runs is constrained. */
 #ifdef CONFIG_USER_ONLY
 #define PE(S)     true
@@ -8849,7 +8853,7 @@ static void i386_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu)
                  * the flag and abort the translation to give the irqs a
                  * chance to happen.
                  */
-                dc->base.is_jmp = DISAS_TOO_MANY;
+                dc->base.is_jmp = DISAS_EOB_NEXT;
             } else if (!is_same_page(&dc->base, pc_next)) {
                 dc->base.is_jmp = DISAS_TOO_MANY;
             }
@@ -8861,9 +8865,24 @@ static void i386_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu)
 {
     DisasContext *dc = container_of(dcbase, DisasContext, base);
 
-    if (dc->base.is_jmp == DISAS_TOO_MANY) {
+    switch (dc->base.is_jmp) {
+    case DISAS_NORETURN:
+        break;
+    case DISAS_TOO_MANY:
+    case DISAS_EOB_NEXT:
+        gen_update_cc_op(dc);
         gen_update_eip_cur(dc);
+        /* fall through */
+    case DISAS_EOB_ONLY:
         gen_eob(dc);
+        break;
+    case DISAS_EOB_INHIBIT_IRQ:
+        gen_update_cc_op(dc);
+        gen_update_eip_cur(dc);
+        gen_eob_inhibit_irq(dc, true);
+        break;
+    default:
+        g_assert_not_reached();
     }
 }