3 files changed, 166 insertions, 0 deletions
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 11e8a0a..e439893 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+012-08-19  Andrew Pinski  <apinski@cavium.com>
+
+	* gdb.arch/mips-octeon-bbit.c: New file.
+	* gdb.arch/mips-octeon-bbit.exp: New Test.
+
 012-08-19  Keith Seitz  <keiths@redhat.com>
 
 	PR c++/14365
diff --git a/gdb/testsuite/gdb.arch/mips-octeon-bbit.c b/gdb/testsuite/gdb.arch/mips-octeon-bbit.c
new file mode 100644
index 0000000..e3df4a4
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/mips-octeon-bbit.c
@@ -0,0 +1,49 @@
+typedef unsigned long long uint64_t;
+void abort (void);
+
+#define BASE 0x1234567812345678ull
+
+#define DEF_BBIT_TAKEN(BRANCH_IF, BIT)					\
+  int bbit_is_taken_##BRANCH_IF##_##BIT (volatile uint64_t *p)		\
+  {									\
+    int ret;								\
+    asm (".set push				\n\t"			\
+	 ".set noreorder			\n\t"			\
+	 "bbit" #BRANCH_IF " %1, " #BIT ", 1f	\n\t"			\
+	 "nop					\n\t"			\
+	 "li %0, 0				\n\t"			\
+	 "b 2f					\n\t"			\
+	 "nop					\n\t"			\
+	 "1:					\n\t"			\
+	 "li %0, 1				\n\t"			\
+	 "2:					\n\t"			\
+	 ".set pop"							\
+	 : "=r"(ret) : "r"(*p));					\
+    return ret;								\
+  }									\
+  volatile uint64_t taken_##BRANCH_IF##_##BIT =				\
+    BASE & (~(1ull << BIT)) | ((uint64_t) BRANCH_IF << BIT);		\
+  volatile uint64_t not_taken_##BRANCH_IF##_##BIT =			\
+    BASE & (~(1ull << BIT)) | (((uint64_t) !BRANCH_IF) << BIT);  
+
+DEF_BBIT_TAKEN (0, 10);
+DEF_BBIT_TAKEN (0, 36);
+DEF_BBIT_TAKEN (1, 20);
+DEF_BBIT_TAKEN (1, 49);
+
+#define EXPECT(X) if (!(X)) abort ();
+
+main ()
+{
+  EXPECT (bbit_is_taken_0_10 (&taken_0_10));
+  EXPECT (!bbit_is_taken_0_10 (&not_taken_0_10));
+
+  EXPECT (bbit_is_taken_0_36 (&taken_0_36));
+  EXPECT (!bbit_is_taken_0_36 (&not_taken_0_36));
+
+  EXPECT (bbit_is_taken_1_20 (&taken_1_20));
+  EXPECT (!bbit_is_taken_1_20 (&not_taken_1_20));
+
+  EXPECT (bbit_is_taken_1_49 (&taken_1_49));
+  EXPECT (!bbit_is_taken_1_49 (&not_taken_1_49));
+}
diff --git a/gdb/testsuite/gdb.arch/mips-octeon-bbit.exp b/gdb/testsuite/gdb.arch/mips-octeon-bbit.exp
new file mode 100644
index 0000000..de6db0f
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/mips-octeon-bbit.exp
@@ -0,0 +1,112 @@
+# Copyright 2007 Cavium Networks, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  
+
+# Test single-step on bbit.  
+
+if ![istarget "*octeon*"] {
+  return -1
+}
+
+proc current_insn {} {
+    global gdb_prompt
+
+    send_gdb "x/i \$pc\n"
+    gdb_expect {
+	-re ".*?:\\s+\(.*?\)\\s*$gdb_prompt $" {
+	    set insn $expect_out(1,string)
+	    return $insn
+	}
+    }
+    return ""
+}
+
+proc single_step {} {
+    global gdb_prompt
+
+    send_gdb "si\n"
+    gdb_expect {
+	-re "$gdb_prompt \$" {
+	    return 1
+	}
+    }
+    return 0;
+}
+
+proc single_step_until { match } {
+    global timeout
+
+    set insn [current_insn]
+    set start [timestamp]
+    while { $insn != "" && [timestamp] - $start < 3*$timeout } {
+	if [regexp $match $insn] {
+	    return 1
+	}
+	if {![single_step]} {
+	    return 0
+	}
+	set insn [current_insn]
+    }
+    return 0;
+}
+
+proc test_bbit { name taken } {
+    if {![single_step_until "bbit"]} {
+	fail "$name single-step until bbit"
+	return
+    }
+    pass "$name single-step until bbit"
+    gdb_test "si" "" "$name single-step on bbit"
+    if [regexp "li\\s+\[sv\]0,$taken" [current_insn]] {
+	pass "$name check insn after bbit"
+    } else {
+	send_log "expected: li\\s+\[sv\]0,$taken found [current_insn]\n"
+	fail "$name check insn after bbit"
+    }
+}
+
+set testfile "mips-octeon-bbit"
+set srcfile ${testfile}.c
+set binfile ${objdir}/${subdir}/${testfile}
+
+if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable \
+       {debug nowarnings}] != "" } {
+     fail "compilation"
+     return
+}
+
+pass "compilation"
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+# Native needs run.
+runto_main
+
+set tests ""
+foreach n [list "0_10" "0_36" "1_20" "1_49"] {
+    lappend tests "bbit_is_taken_$n"
+}
+foreach func $tests {
+    gdb_test "break $func" "Breakpoint.*at.*" "set breakpoint on $func"
+}
+
+foreach func $tests {
+    gdb_test "continue" "Continuing.*Breakpoint.*$func.*" "hit $func first"
+    test_bbit "$func branch taken" 1
+    gdb_test "continue" "Continuing.*Breakpoint.*$func.*" "hit $func second"
+    test_bbit "$func branch not taken" 0
+}