* ldexp.c: Add LOG2CEIL() builtin function to linker script language

	* ldgram.y: Likewise
	* ldlex.l: Likewise
	* NEWS: Mention the new feature.
	* ld.texinfo: Document the new feature.

	* ld-scripts/log2.exp: New: Run the new log2 test.
	* ld-scripts/log2.s: Source for the new test.
	* ld-scripts/log2.t: Linker script for new test.

3 files changed, 43 insertions, 0 deletions

diff --git a/ld/testsuite/ld-scripts/log2.exp b/ld/testsuite/ld-scripts/log2.exp
new file mode 100644
index 0000000..43827dc
--- /dev/null
+++ b/ld/testsuite/ld-scripts/log2.exp
@@ -0,0 +1,34 @@
+# Test LOG2() expression in linker script language.
+# By Clemens Lang
+#   Copyright 2013
+#   Free Software Foundation, Inc.
+#
+# This file is part of the GNU Binutils.
+#
+# 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
+# MA 02110-1301, USA.
+
+set testname "binary logarithm"
+
+if {![ld_assemble $as $srcdir/$subdir/log2.s tmpdir/log2.o]} {
+	unresolved $testname
+	return
+}
+
+if {![ld_simple_link $ld tmpdir/log2 "-T $srcdir/$subdir/log2.t tmpdir/log2.o"]} {
+	fail $testname
+} else {
+	pass $testname
+}
diff --git a/ld/testsuite/ld-scripts/log2.s b/ld/testsuite/ld-scripts/log2.s
new file mode 100644
index 0000000..f3f74ab
--- /dev/null
+++ b/ld/testsuite/ld-scripts/log2.s
@@ -0,0 +1 @@
+	.word 0
diff --git a/ld/testsuite/ld-scripts/log2.t b/ld/testsuite/ld-scripts/log2.t
new file mode 100644
index 0000000..abf73a9
--- /dev/null
+++ b/ld/testsuite/ld-scripts/log2.t
@@ -0,0 +1,8 @@
+ASSERT(LOG2CEIL(0) == 0,      "LOG2CEIL(0) == 0");
+ASSERT(LOG2CEIL(1) == 0,      "LOG2CEIL(1) == 0");
+ASSERT(LOG2CEIL(2) == 1,      "LOG2CEIL(2) == 1");
+ASSERT(LOG2CEIL(3) == 2,      "LOG2CEIL(3) == 2");
+ASSERT(LOG2CEIL(4) == 2,      "LOG2CEIL(4) == 2");
+ASSERT(LOG2CEIL(0x0ff) == 8,  "LOG2CEIL(0x0ff) == 8");
+ASSERT(LOG2CEIL(0x100) == 8,  "LOG2CEIL(0x100) == 8");
+ASSERT(LOG2CEIL(0x1ff) == 9,  "LOG2CEIL(0x1ff) == 9");