aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.4.3/gcc/config/rs6000/darwin-fpsave.asm
diff options
context:
space:
mode:
Diffstat (limited to 'gcc-4.4.3/gcc/config/rs6000/darwin-fpsave.asm')
-rw-r--r--gcc-4.4.3/gcc/config/rs6000/darwin-fpsave.asm92
1 files changed, 92 insertions, 0 deletions
diff --git a/gcc-4.4.3/gcc/config/rs6000/darwin-fpsave.asm b/gcc-4.4.3/gcc/config/rs6000/darwin-fpsave.asm
new file mode 100644
index 000000000..47fdc92f8
--- /dev/null
+++ b/gcc-4.4.3/gcc/config/rs6000/darwin-fpsave.asm
@@ -0,0 +1,92 @@
+/* This file contains the floating-point save and restore routines.
+ *
+ * Copyright (C) 2004, 2009 Free Software Foundation, Inc.
+ *
+ * This file 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, or (at your option) any
+ * later version.
+ *
+ * This file 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.
+ *
+ * Under Section 7 of GPL version 3, you are granted additional
+ * permissions described in the GCC Runtime Library Exception, version
+ * 3.1, as published by the Free Software Foundation.
+ *
+ * You should have received a copy of the GNU General Public License and
+ * a copy of the GCC Runtime Library Exception along with this program;
+ * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+/* THE SAVE AND RESTORE ROUTINES CAN HAVE ONLY ONE GLOBALLY VISIBLE
+ ENTRY POINT - callers have to jump to "saveFP+60" to save f29..f31,
+ for example. For FP reg saves/restores, it takes one instruction
+ (4 bytes) to do the operation; for Vector regs, 2 instructions are
+ required (8 bytes.)
+
+ MORAL: DO NOT MESS AROUND WITH THESE FUNCTIONS! */
+
+#include "darwin-asm.h"
+
+.text
+ .align 2
+
+/* saveFP saves R0 -- assumed to be the callers LR -- to 8/16(R1). */
+
+.private_extern saveFP
+saveFP:
+ stfd f14,-144(r1)
+ stfd f15,-136(r1)
+ stfd f16,-128(r1)
+ stfd f17,-120(r1)
+ stfd f18,-112(r1)
+ stfd f19,-104(r1)
+ stfd f20,-96(r1)
+ stfd f21,-88(r1)
+ stfd f22,-80(r1)
+ stfd f23,-72(r1)
+ stfd f24,-64(r1)
+ stfd f25,-56(r1)
+ stfd f26,-48(r1)
+ stfd f27,-40(r1)
+ stfd f28,-32(r1)
+ stfd f29,-24(r1)
+ stfd f30,-16(r1)
+ stfd f31,-8(r1)
+ stg r0,SAVED_LR_OFFSET(r1)
+ blr
+
+/* restFP restores the caller`s LR from 8/16(R1). Note that the code for
+ this starts at the offset of F30 restoration, so calling this
+ routine in an attempt to restore only F31 WILL NOT WORK (it would
+ be a stupid thing to do, anyway.) */
+
+.private_extern restFP
+restFP:
+ lfd f14,-144(r1)
+ lfd f15,-136(r1)
+ lfd f16,-128(r1)
+ lfd f17,-120(r1)
+ lfd f18,-112(r1)
+ lfd f19,-104(r1)
+ lfd f20,-96(r1)
+ lfd f21,-88(r1)
+ lfd f22,-80(r1)
+ lfd f23,-72(r1)
+ lfd f24,-64(r1)
+ lfd f25,-56(r1)
+ lfd f26,-48(r1)
+ lfd f27,-40(r1)
+ lfd f28,-32(r1)
+ lfd f29,-24(r1)
+ /* <OFFSET OF F30 RESTORE> restore callers LR */
+ lg r0,SAVED_LR_OFFSET(r1)
+ lfd f30,-16(r1)
+ /* and prepare for return to caller */
+ mtlr r0
+ lfd f31,-8(r1)
+ blr