From dd5d6fe913b458463aecb3abd6dca049e5d5b0c6 Mon Sep 17 00:00:00 2001
From: pbrook <pbrook@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Sun, 29 Jun 2008 10:43:16 +0000
Subject: [PATCH] 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 +++++++++++++++++++++++++++++++++++++++++
 qemu-doc.texi           |  2 +-
 target-mips/translate.c |  1 -
 vl.c                    |  2 +-
 4 files changed, 58 insertions(+), 3 deletions(-)
 create mode 100644 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);
+}
+
diff --git a/qemu-doc.texi b/qemu-doc.texi
index 057b9f6551..cda403faa0 100644
--- a/qemu-doc.texi
+++ b/qemu-doc.texi
@@ -974,7 +974,7 @@ time within a few seconds of real time.
 
 Note that while this option can give deterministic behavior, it does not
 provide cycle accurate emulation.  Modern CPUs contain superscalar out of
-order cores with complex cache heirachies.  The number of instructions
+order cores with complex cache hierarchies.  The number of instructions
 executed often has little or no correlation with actual performance.
 @end table
 
diff --git a/target-mips/translate.c b/target-mips/translate.c
index 67fbbedf7e..a4329f383f 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -7861,7 +7861,6 @@ gen_intermediate_code_internal (CPUState *env, TranslationBlock *tb,
 #else
     ctx.mem_idx = ctx.hflags & MIPS_HFLAG_KSU;
 #endif
-    num_insns = 0;
     num_insns = 0;
     max_insns = tb->cflags & CF_COUNT_MASK;
     if (max_insns == 0)
diff --git a/vl.c b/vl.c
index 72ce67b02d..00d43eeeee 100644
--- a/vl.c
+++ b/vl.c
@@ -7446,7 +7446,7 @@ static void help(int exitcode)
            "                To see what timers are available use -clock ?\n"
            "-startdate      select initial date of the clock\n"
            "-icount [N|auto]\n"
-           "                Enable virtual instruction counter with 2^N clock ticks per instructon\n"
+           "                Enable virtual instruction counter with 2^N clock ticks per instruction\n"
            "\n"
            "During emulation, the following keys are useful:\n"
            "ctrl-alt-f      toggle full screen\n"
-- 
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