From dd5d6fe913b458463aecb3abd6dca049e5d5b0c6 Mon Sep 17 00:00:00 2001
From: pbrook
Date: Sun, 29 Jun 2008 10:43:16 +0000
Subject: Add missing file. Fix spelling errors.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4800 c046a42c-6fe2-441c-8c8c-71466251a162
---
 gen-icount.h | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 gen-icount.h

(limited to 'gen-icount.h')

diff --git a/gen-icount.h b/gen-icount.h
new file mode 100644
index 0000000000..172b2bc7d7
--- /dev/null
+++ b/gen-icount.h
@@ -0,0 +1,56 @@
+/* Helpewrs for instruction counting code genration.  */
+
+static TCGArg *icount_arg;
+static int icount_label;
+
+static inline void gen_icount_start(void)
+{
+    TCGv count;
+
+    if (!use_icount)
+        return;
+
+    icount_label = gen_new_label();
+    /* FIXME: This generates lousy code.  We can't use tcg_new_temp because
+       count needs to live over the conditional branch.  To workaround this
+       we allow the target to supply a convenient register temporary.  */
+#ifndef ICOUNT_TEMP
+    count = tcg_temp_local_new(TCG_TYPE_I32);
+#else
+    count = ICOUNT_TEMP;
+#endif
+    tcg_gen_ld_i32(count, cpu_env, offsetof(CPUState, icount_decr.u32));
+    /* This is a horrid hack to allow fixing up the value later.  */
+    icount_arg = gen_opparam_ptr + 1;
+    tcg_gen_subi_i32(count, count, 0xdeadbeef);
+
+    tcg_gen_brcondi_i32(TCG_COND_LT, count, 0, icount_label);
+    tcg_gen_st16_i32(count, cpu_env, offsetof(CPUState, icount_decr.u16.low));
+#ifndef ICOUNT_TEMP
+    tcg_temp_free(count);
+#endif
+}
+
+static void gen_icount_end(TranslationBlock *tb, int num_insns)
+{
+    if (use_icount) {
+        *icount_arg = num_insns;
+        gen_set_label(icount_label);
+        tcg_gen_exit_tb((long)tb + 2);
+    }
+}
+
+static void inline gen_io_start(void)
+{
+    TCGv tmp = tcg_const_i32(1);
+    tcg_gen_st_i32(tmp, cpu_env, offsetof(CPUState, can_do_io));
+    tcg_temp_free(tmp);
+}
+
+static inline void gen_io_end(void)
+{
+    TCGv tmp = tcg_const_i32(0);
+    tcg_gen_st_i32(tmp, cpu_env, offsetof(CPUState, can_do_io));
+    tcg_temp_free(tmp);
+}
+
-- 
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