2004-03-21 Andrew Pinski <pinskia@physics.uc.edu>

        * config/rs6000/t-darwin (LIB2FUNCS_STATIC_EXTRA):
        Add darwin-fpsave.asm, darwin-vecsave.asm,
        and darwin-world.asm.
        (TARGET_LIBGCC2_CFLAGS): Add -Wa,-force_cpusubtype_ALL
        as the asm files contain altivec instructions.
        * config/rs6000/darwin-fpsave.asm: New file.
        * config/rs6000/darwin-vecsave.asm: New file.
        * config/rs6000/darwin-world.asm: New file.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@80251 138bc75d-0d04-0410-961f-82ee72b054a4

4 files changed, 535 insertions, 1 deletions

diff --git a/gcc/config/rs6000/darwin-fpsave.asm b/gcc/config/rs6000/darwin-fpsave.asm
new file mode 100644
index 00000000000..c8c646b09db
--- /dev/null
+++ b/gcc/config/rs6000/darwin-fpsave.asm
@@ -0,0 +1,100 @@
+/*  This file contains the floating-point save and restore routines.
+ *
+ *   Copyright (C) 2004 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 2, or (at your option) any
+ * later version.
+ * 
+ * In addition to the permissions in the GNU General Public License, the
+ * Free Software Foundation gives you unlimited permission to link the
+ * compiled version of this file with other programs, and to distribute
+ * those programs without any restriction coming from the use of this
+ * file.  (The General Public License restrictions do apply in other
+ * respects; for example, they cover modification of the file, and
+ * distribution when not linked into another program.)
+ * 
+ * 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.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ * 
+ *  As a special exception, if you link this library with files
+ *  compiled with GCC to produce an executable, this does not cause the
+ *  resulting executable to be covered by the GNU General Public License.
+ *  This exception does not however invalidate any other reasons why the
+ *  executable file might be covered by the GNU General Public License.
+ */ 
+
+/* 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!  */
+
+.text
+	.align 2
+
+/* saveFP saves R0 -- assumed to be the callers LR -- to 8(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)
+	stw  r0,8(r1)
+	blr
+
+/* restFP restores the caller`s LR from 8(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  */
+	lwz r0,8(r1)
+	lfd f30,-16(r1)
+			/* and prepare for return to caller  */
+	mtlr r0	
+	lfd f31,-8(r1)
+	blr
diff --git a/gcc/config/rs6000/darwin-vecsave.asm b/gcc/config/rs6000/darwin-vecsave.asm
new file mode 100644
index 00000000000..58ec8eaa1a3
--- /dev/null
+++ b/gcc/config/rs6000/darwin-vecsave.asm
@@ -0,0 +1,164 @@
+/*  This file contains the vector save and restore routines.
+ *
+ *   Copyright (C) 2004 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 2, or (at your option) any
+ * later version.
+ * 
+ * In addition to the permissions in the GNU General Public License, the
+ * Free Software Foundation gives you unlimited permission to link the
+ * compiled version of this file with other programs, and to distribute
+ * those programs without any restriction coming from the use of this
+ * file.  (The General Public License restrictions do apply in other
+ * respects; for example, they cover modification of the file, and
+ * distribution when not linked into another program.)
+ * 
+ * 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.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ * 
+ *  As a special exception, if you link this library with files
+ *  compiled with GCC to produce an executable, this does not cause the
+ *  resulting executable to be covered by the GNU General Public License.
+ *  This exception does not however invalidate any other reasons why the
+ *  executable file might be covered by the GNU General Public License.
+ */ 
+
+/* Vector save/restore routines for Darwin.  Note that each vector
+   save/restore requires 2 instructions (8 bytes.)
+
+   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.).   */
+
+.text
+	.align 2
+
+.private_extern saveVEC
+saveVEC:
+	li r11,-192
+	stvx v20,r11,r0
+	li r11,-176
+	stvx v21,r11,r0
+	li r11,-160
+	stvx v22,r11,r0
+	li r11,-144
+	stvx v23,r11,r0
+	li r11,-128
+	stvx v24,r11,r0
+	li r11,-112
+	stvx v25,r11,r0
+	li r11,-96
+	stvx v26,r11,r0
+	li r11,-80
+	stvx v27,r11,r0
+	li r11,-64
+	stvx v28,r11,r0
+	li r11,-48
+	stvx v29,r11,r0
+	li r11,-32
+	stvx v30,r11,r0
+	li r11,-16
+	stvx v31,r11,r0
+	blr
+
+.private_extern restVEC
+restVEC:
+	li r11,-192
+	lvx v20,r11,r0
+	li r11,-176
+	lvx v21,r11,r0
+	li r11,-160
+	lvx v22,r11,r0
+	li r11,-144
+	lvx v23,r11,r0
+	li r11,-128
+	lvx v24,r11,r0
+	li r11,-112
+	lvx v25,r11,r0
+	li r11,-96
+	lvx v26,r11,r0
+	li r11,-80
+	lvx v27,r11,r0
+	li r11,-64
+	lvx v28,r11,r0
+	li r11,-48
+	lvx v29,r11,r0
+	li r11,-32
+	lvx v30,r11,r0
+	li r11,-16
+	lvx v31,r11,r0
+	blr
+
+/* saveVEC_vr11 -- as saveVEC but VRsave is returned in R11.  */
+
+.private_extern saveVEC_vr11
+saveVEC_vr11:
+	li r11,-192
+	stvx v20,r11,r0
+	li r11,-176
+	stvx v21,r11,r0
+	li r11,-160
+	stvx v22,r11,r0
+	li r11,-144
+	stvx v23,r11,r0
+	li r11,-128
+	stvx v24,r11,r0
+	li r11,-112
+	stvx v25,r11,r0
+	li r11,-96
+	stvx v26,r11,r0
+	li r11,-80
+	stvx v27,r11,r0
+	li r11,-64
+	stvx v28,r11,r0
+	li r11,-48
+	stvx v29,r11,r0
+	li r11,-32
+	stvx v30,r11,r0
+	li r11,-16
+	stvx v31,r11,r0
+	mfspr r11,VRsave
+	blr
+
+/* As restVec, but the original VRsave value passed in R10.  */
+
+.private_extern restVEC_vr10
+restVEC_vr10:
+	li r11,-192
+	lvx v20,r11,r0
+	li r11,-176
+	lvx v21,r11,r0
+	li r11,-160
+	lvx v22,r11,r0
+	li r11,-144
+	lvx v23,r11,r0
+	li r11,-128
+	lvx v24,r11,r0
+	li r11,-112
+	lvx v25,r11,r0
+	li r11,-96
+	lvx v26,r11,r0
+	li r11,-80
+	lvx v27,r11,r0
+	li r11,-64
+	lvx v28,r11,r0
+	li r11,-48
+	lvx v29,r11,r0
+	li r11,-32
+	lvx v30,r11,r0
+	li r11,-16
+	lvx v31,r11,r0
+				/* restore VRsave from R10.  */
+	mtspr VRsave,r10
+	blr
diff --git a/gcc/config/rs6000/darwin-world.asm b/gcc/config/rs6000/darwin-world.asm
new file mode 100644
index 00000000000..57b516f9b4f
--- /dev/null
+++ b/gcc/config/rs6000/darwin-world.asm
@@ -0,0 +1,264 @@
+/*  This file contains the exception-handling save_world and
+ *  restore_world routines, which need to do a run-time check to see if
+ *  they should save and restore the vector registers.
+ *
+ *   Copyright (C) 2004 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 2, or (at your option) any
+ * later version.
+ * 
+ * In addition to the permissions in the GNU General Public License, the
+ * Free Software Foundation gives you unlimited permission to link the
+ * compiled version of this file with other programs, and to distribute
+ * those programs without any restriction coming from the use of this
+ * file.  (The General Public License restrictions do apply in other
+ * respects; for example, they cover modification of the file, and
+ * distribution when not linked into another program.)
+ * 
+ * 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.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ * 
+ *  As a special exception, if you link this library with files
+ *  compiled with GCC to produce an executable, this does not cause the
+ *  resulting executable to be covered by the GNU General Public License.
+ *  This exception does not however invalidate any other reasons why the
+ *  executable file might be covered by the GNU General Public License.
+ */ 
+
+.data
+	.align 2
+
+#ifdef __DYNAMIC__
+
+.non_lazy_symbol_pointer
+L_has_vec$non_lazy_ptr:
+	.indirect_symbol __cpu_has_altivec
+	.long	0
+
+#else
+
+/* For static, "pretend" we have a non-lazy-pointer.  */
+
+L_has_vec$non_lazy_ptr:
+	.long __cpu_has_altivec
+
+#endif
+
+
+.text
+	.align 2
+
+/* save_world and rest_world save/restore F14-F31 and possibly V20-V31
+   (assuming you have a CPU with vector registers; we use a global var
+   provided by the System Framework to determine this.)
+
+   SAVE_WORLD takes R0 (the caller`s caller`s return address) and R11
+   (the stack frame size) as parameters.  It returns VRsave in R0 if
+   we`re on a CPU with vector regs.
+
+   With gcc3, we now need to save and restore CR as well, since gcc3's
+   scheduled prologs can cause comparisons to be moved before calls to
+   save_world!
+
+   USES: R0 R11 R12  */
+
+.private_extern save_world
+save_world:
+	stw r0,8(r1)
+	mflr r0
+	bcl 20,31,Ls$pb
+Ls$pb:	mflr r12
+	addis r12,r12,ha16(L_has_vec$non_lazy_ptr-Ls$pb)
+	lwz r12,lo16(L_has_vec$non_lazy_ptr-Ls$pb)(r12)
+	mtlr r0
+	lwz r12,0(r12)
+				/* grab CR  */
+	mfcr r0	
+				/* test HAS_VEC  */
+	cmpwi r12,0
+	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)
+	stmw r13,-220(r1)
+				/* stash CR  */
+	stw r0,4(r1)
+				/* set R12 pointing at Vector Reg save area  */
+	addi r12,r1,-224
+				/* allocate stack frame  */
+	stwux r1,r1,r11
+				/* ...but return if HAS_VEC is zero   */
+	bne+ L$saveVMX
+				/* Not forgetting to restore CR.  */
+	mtcr r0
+	blr
+
+L$saveVMX:
+				/* We're saving Vector regs too.  */
+				/* Restore CR from R0.  No More Branches!  */
+	mtcr r0
+
+	/* We should really use VRSAVE to figure out which vector regs
+	   we actually need to save and restore.  Some other time :-/  */
+
+	li r11,-192
+	stvx v20,r11,r12
+	li r11,-176
+	stvx v21,r11,r12
+	li r11,-160
+	stvx v22,r11,r12
+	li r11,-144
+	stvx v23,r11,r12
+	li r11,-128
+	stvx v24,r11,r12
+	li r11,-112
+	stvx v25,r11,r12
+	li r11,-96
+	stvx v26,r11,r12
+	li r11,-80
+	stvx v27,r11,r12
+	li r11,-64
+	stvx v28,r11,r12
+	li r11,-48
+	stvx v29,r11,r12
+	li r11,-32
+	stvx v30,r11,r12
+	mfspr r0,VRsave
+	li r11,-16
+	stvx v31,r11,r12
+				/* VRsave lives at -224(R1)  */
+	stw r0,0(r12)
+	blr
+
+
+/* eh_rest_world_r10 is jumped to, not called, so no need to worry about LR.
+   R10 is the C++ EH stack adjust parameter, we return to the caller`s caller.
+
+   USES: R0 R10 R11 R12   and R7 R8
+   RETURNS: C++ EH Data registers (R3 - R6.)
+
+   We now set up R7/R8 and jump to rest_world_eh_r7r8.
+
+   rest_world doesn't use the R10 stack adjust parameter, nor does it
+   pick up the R3-R6 exception handling stuff.  */
+
+.private_extern rest_world
+rest_world:
+				/* Pickup previous SP  */
+	lwz r11, 0(r1)
+	li r7, 0
+	lwz r8, 8(r11)
+	li r10, 0
+	b rest_world_eh_r7r8
+
+.private_extern eh_rest_world_r10
+eh_rest_world_r10:
+				/* Pickup previous SP  */
+	lwz r11, 0(r1)
+	mr  r7,r10
+	lwz r8, 8(r11)
+			/* pickup the C++ EH data regs (R3 - R6.)  */
+	lwz r6,-420(r11)
+	lwz r5,-424(r11)
+	lwz r4,-428(r11)
+	lwz r3,-432(r11)
+
+	b rest_world_eh_r7r8
+
+/* rest_world_eh_r7r8 is jumped to -- not called! -- when we're doing
+   the exception-handling epilog.  R7 contains the offset to add to
+   the SP, and R8 contains the 'real' return address.
+
+   USES: R0 R11 R12  [R7/R8]
+   RETURNS: C++ EH Data registers (R3 - R6.)  */
+
+rest_world_eh_r7r8:
+	bcl 20,31,Lr7r8$pb
+Lr7r8$pb: mflr r12
+	lwz r11,0(r1)
+				/* R11 := previous SP  */
+	addis r12,r12,ha16(L_has_vec$non_lazy_ptr-Lr7r8$pb)
+	lwz r12,lo16(L_has_vec$non_lazy_ptr-Lr7r8$pb)(r12)
+	lwz r0,4(r11)
+				/* R0 := old CR  */
+	lwz r12,0(r12)
+				/* R12 := HAS_VEC  */
+	mtcr r0	
+	cmpwi r12,0
+	lmw r13,-220(r11)
+	beq L.rest_world_fp_eh
+				/* restore VRsave and V20..V31  */
+	lwz r0,-224(r11)
+	li r12,-416
+	mtspr VRsave,r0
+	lvx v20,r11,r12
+	li r12,-400
+	lvx v21,r11,r12
+	li r12,-384
+	lvx v22,r11,r12
+	li r12,-368
+	lvx v23,r11,r12
+	li r12,-352
+	lvx v24,r11,r12
+	li r12,-336
+	lvx v25,r11,r12
+	li r12,-320
+	lvx v26,r11,r12
+	li r12,-304
+	lvx v27,r11,r12
+	li r12,-288
+	lvx v28,r11,r12
+	li r12,-272
+	lvx v29,r11,r12
+	li r12,-256
+	lvx v30,r11,r12
+	li r12,-240
+	lvx v31,r11,r12
+
+L.rest_world_fp_eh:
+	lfd f14,-144(r11)
+	lfd f15,-136(r11)
+	lfd f16,-128(r11)
+	lfd f17,-120(r11)
+	lfd f18,-112(r11)
+	lfd f19,-104(r11)
+	lfd f20,-96(r11)
+	lfd f21,-88(r11)
+	lfd f22,-80(r11)
+	lfd f23,-72(r11)
+	lfd f24,-64(r11)
+	lfd f25,-56(r11)
+	lfd f26,-48(r11)
+	lfd f27,-40(r11)
+	lfd f28,-32(r11)
+	lfd f29,-24(r11)
+	lfd f30,-16(r11)
+			/* R8 is the exception-handler's address  */
+	mtctr r8
+	lfd f31,-8(r11)
+			/* set SP to original value + R7 offset  */
+	add r1,r11,r7
+	bctr
diff --git a/gcc/config/rs6000/t-darwin b/gcc/config/rs6000/t-darwin
index 185bb00eed2..3302176c93d 100644
--- a/gcc/config/rs6000/t-darwin
+++ b/gcc/config/rs6000/t-darwin
@@ -2,6 +2,12 @@
 LIB2FUNCS_EXTRA = $(srcdir)/config/rs6000/darwin-tramp.asm \
 	$(srcdir)/config/rs6000/darwin-ldouble.c
 
+LIB2FUNCS_STATIC_EXTRA = \
+	$(srcdir)/config/rs6000/darwin-fpsave.asm  \
+	$(srcdir)/config/rs6000/darwin-vecsave.asm  \
+	$(srcdir)/config/rs6000/darwin-world.asm
+
+# Enable AltiVec instructions when assembling the aforementioned .asm files.
 # For libgcc, we always want 128-bit long double, since a libgcc built with
 # that will work without it.
-TARGET_LIBGCC2_CFLAGS = -mlong-double-128
+TARGET_LIBGCC2_CFLAGS = -mlong-double-128 -Wa,-force_cpusubtype_ALL