Merge remote-tracking branch 'gnu/gcc-4_7-branch' into rework

[pf3gnuchains/gcc-fork.git] / libgcc / config / rs6000 / darwin-gpsave.S

diff --git a/libgcc/config/rs6000/darwin-gpsave.S b/libgcc/config/rs6000/darwin-gpsave.S
new file mode 100644 (file)
index 0000000..d3c3b91
--- /dev/null
+++ b/libgcc/config/rs6000/darwin-gpsave.S
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+/*  This file contains the GPR save and restore routines for Darwin.
+ *
+ *   Copyright (C) 2011 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/>.
+ */
+
+/* Contributed by Iain Sandoe  <iains@gcc.gnu.org> */
+
+/* Like their FP and VEC counterparts, these routines have only one externally
+   visible entry point.  Calls have to be constructed as offsets from this.
+   (I.E. callers have to jump to "saveGPR+((x-13)*4" to save registers x..31).
+
+   Each save/load instruction is 4 bytes long (for both m32 and m64 builds).
+
+   The save/restores here are done w.r.t r11.
+
+   restGPRx restores the link reg from the stack and returns to the saved
+   address.
+
+   */
+
+#include "darwin-asm.h"
+
+       .text
+       .align 2
+
+       .private_extern saveGPR
+saveGPR:
+       stg r13,(-19 * GPR_BYTES)(r11)
+       stg r14,(-18 * GPR_BYTES)(r11)
+       stg r15,(-17 * GPR_BYTES)(r11)
+       stg r16,(-16 * GPR_BYTES)(r11)
+       stg r17,(-15 * GPR_BYTES)(r11)
+       stg r18,(-14 * GPR_BYTES)(r11)
+       stg r19,(-13 * GPR_BYTES)(r11)
+       stg r20,(-12 * GPR_BYTES)(r11)
+       stg r21,(-11 * GPR_BYTES)(r11)
+       stg r22,(-10 * GPR_BYTES)(r11)
+       stg r23,( -9 * GPR_BYTES)(r11)
+       stg r24,( -8 * GPR_BYTES)(r11)
+       stg r25,( -7 * GPR_BYTES)(r11)
+       stg r26,( -6 * GPR_BYTES)(r11)
+       stg r27,( -5 * GPR_BYTES)(r11)
+       stg r28,( -4 * GPR_BYTES)(r11)
+       stg r29,( -3 * GPR_BYTES)(r11)
+       stg r30,( -2 * GPR_BYTES)(r11)
+       stg r31,( -1 * GPR_BYTES)(r11)
+       blr
+
+/* */
+
+       .private_extern restGPR
+restGPR:
+       lg r13,(-19 * GPR_BYTES)(r11)
+       lg r14,(-18 * GPR_BYTES)(r11)
+       lg r15,(-17 * GPR_BYTES)(r11)
+       lg r16,(-16 * GPR_BYTES)(r11)
+       lg r17,(-15 * GPR_BYTES)(r11)
+       lg r18,(-14 * GPR_BYTES)(r11)
+       lg r19,(-13 * GPR_BYTES)(r11)
+       lg r20,(-12 * GPR_BYTES)(r11)
+       lg r21,(-11 * GPR_BYTES)(r11)
+       lg r22,(-10 * GPR_BYTES)(r11)
+       lg r23,( -9 * GPR_BYTES)(r11)
+       lg r24,( -8 * GPR_BYTES)(r11)
+       lg r25,( -7 * GPR_BYTES)(r11)
+       lg r26,( -6 * GPR_BYTES)(r11)
+       lg r27,( -5 * GPR_BYTES)(r11)
+       lg r28,( -4 * GPR_BYTES)(r11)
+       lg r29,( -3 * GPR_BYTES)(r11)
+       lg r30,( -2 * GPR_BYTES)(r11)
+       lg r31,( -1 * GPR_BYTES)(r11)
+       blr
+
+       .private_extern restGPRx
+restGPRx:
+       lg r13,(-19 * GPR_BYTES)(r11)
+       lg r14,(-18 * GPR_BYTES)(r11)
+       lg r15,(-17 * GPR_BYTES)(r11)
+       lg r16,(-16 * GPR_BYTES)(r11)
+       lg r17,(-15 * GPR_BYTES)(r11)
+       lg r18,(-14 * GPR_BYTES)(r11)
+       lg r19,(-13 * GPR_BYTES)(r11)
+       lg r20,(-12 * GPR_BYTES)(r11)
+       lg r21,(-11 * GPR_BYTES)(r11)
+       lg r22,(-10 * GPR_BYTES)(r11)
+       lg r23,( -9 * GPR_BYTES)(r11)
+       lg r24,( -8 * GPR_BYTES)(r11)
+       lg r25,( -7 * GPR_BYTES)(r11)
+       lg r26,( -6 * GPR_BYTES)(r11)
+       lg r27,( -5 * GPR_BYTES)(r11)
+       lg r28,( -4 * GPR_BYTES)(r11)
+       lg r29,( -3 * GPR_BYTES)(r11)
+       /* Like the FP restore, we start from the offset for r30
+          thus a restore of only r31 is not going to work.  */
+       lg r0,SAVED_LR_OFFSET(r1)
+       lg r30,( -2 * GPR_BYTES)(r11)
+       mtlr r0
+       lg r31,( -1 * GPR_BYTES)(r11)
+       blr