* lib2funcs.asm (__outline_prologue): New "function".

        (__outline_epilogue): New "function".
        * pa.h (TARGET_SPACE): Define.
        (target_flags): Add -mspace and -mno-space.  Enable/disable
        space saving optimizations.
        (FRAME_POINTER_REQUIRED): Frame pointers are always required
        when generating out of line prologues and epilogues.
        * pa.c (compute_frame_size): Handle out of line prologues/epilogues.
        (hppa_expand_prologue): If optimizing for space, emit an out of
        line prologue.
        * pa.c (compute_frame_size): Handle out of line prologues/epilogues.
        (hppa_expand_prologue): If optimizing for space, emit an out of
        line prologue.
        (hppa_expand_epilogue): Similarly.
        (override_options): Optimizing for space is not compatable with
        either profiling or PIC code generation.
        * pa.md (outline_prologue_call): New pattern.
        (outline_epilogue_call): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@11438 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 250 insertions, 0 deletions

diff --git a/gcc/config/pa/lib2funcs.asm b/gcc/config/pa/lib2funcs.asm
index ea964d3af6f..d6f5cbc1d9d 100644
--- a/gcc/config/pa/lib2funcs.asm
+++ b/gcc/config/pa/lib2funcs.asm
@@ -24,6 +24,8 @@
 	.SPACE $TEXT$
 	.SUBSPA $LIT$,QUAD=0,ALIGN=8,ACCESS=44
 	.SUBSPA $CODE$,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY
+	.SUBSPA $MILLICODE$,QUAD=0,ALIGN=8,ACCESS=44,SORT=8
+
 	.IMPORT $$dyncall,MILLICODE
 ; gcc_compiled.:
 	.SPACE $TEXT$
@@ -61,3 +63,251 @@ L$foo
 	be,n 0(%sr0,%rp)
 	.EXIT
 	.PROCEND
+
+	.SPACE $TEXT$
+	.SUBSPA $MILLICODE$
+
+; This is an out-of-line prologue.
+;
+; It performs the following operations:
+;
+;	* Saves the return pointer at sp - 20
+;
+;	* Creates a new stack frame (sp'), size of the frame is passed in %r21
+;
+;	* The old stack pointer is saved at sp
+;
+;	* Saves grs (passed in low 16 bits of %r22 into the stack frame
+;	at sp' + local_fsize (passed in %r19).
+;
+;	* Saves frs (passed in high 16 bits of %r22) into the stack
+;	frame at sp' + local_fsize (passed in %r19).
+;
+;	* Sets up a frame pointer (in %r3).
+;
+;	* Returns to the instruction _immediately_ after the call to
+;	this function.
+
+	.align 32
+	.NSUBSPA $MILLICODE$,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY
+	.EXPORT __outline_prologue,MILLICODE
+__outline_prologue
+	.PROC
+	.CALLINFO FRAME=0,NO_CALLS
+	.ENTRY
+	copy %r30,%r20
+
+	; Subtract 4 from our return pointer so that we return to
+	; the right location.
+        ldo -4(%r31),%r31
+
+	; Save off %r2
+	stw %r2,-20(0,%r30)
+
+	; Make our new frame.
+	add %r21,%r30,%r30
+
+	; Save our old stack pointer.
+	stw %r20,0(0,%r20)
+
+	; Add in local_fsize to our frame pointer so we do register
+	; saves into the right place
+	add %r20,%r19,%r20
+
+	; %r22 tells us what registers we need to save.  The upper half
+	; is for fp registers, the lower half for integer registers.
+	; We put the lower half in %r1 and the upper half into %r22
+	; for later use.
+	extru %r22,31,16,%r1
+	extrs %r22,15,16,%r22
+
+	; %r1 now olds a value 0-18 which corresponds to the number
+	; of grs we need to save.  We need to reverse that value so
+	; we can just into the table and straight-line execute to the
+	; end of the gr saves.
+	comb,= %r0,%r1,L$0000
+	subi 18,%r1,%r1
+	blr,n %r1,%r0
+	b,n L$0000
+	stws,ma %r18,4(0,%r20)
+	nop
+	stws,ma %r17,4(0,%r20)
+	nop
+	stws,ma %r16,4(0,%r20)
+	nop
+	stws,ma %r15,4(0,%r20)
+	nop
+	stws,ma %r14,4(0,%r20)
+	nop
+	stws,ma %r13,4(0,%r20)
+	nop
+	stws,ma %r12,4(0,%r20)
+	nop
+	stws,ma %r11,4(0,%r20)
+	nop
+	stws,ma %r10,4(0,%r20)
+	nop
+	stws,ma %r9,4(0,%r20)
+	nop
+	stws,ma %r8,4(0,%r20)
+	nop
+	stws,ma %r7,4(0,%r20)
+	nop
+	stws,ma %r6,4(0,%r20)
+	nop
+	stws,ma %r5,4(0,%r20)
+	nop
+	stws,ma %r4,4(0,%r20)
+	nop
+	stws,ma %r3,4(0,%r20)
+	nop
+L$0000
+	; All gr saves are done.  Align the temporary frame pointer and
+	; do the fr saves.
+	ldo 7(%r20),%r20
+	depi 0,31,3,%r20
+
+	comb,= %r0,%r22,L$0001
+	subi 21,%r22,%r22
+	blr,n %r22,%r0
+	b,n L$0001
+	fstws,ma %fr21,8(0,%r20)
+	nop
+	fstws,ma %fr20,8(0,%r20)
+	nop
+	fstws,ma %fr19,8(0,%r20)
+	nop
+	fstws,ma %fr18,8(0,%r20)
+	nop
+	fstws,ma %fr17,8(0,%r20)
+	nop
+	fstws,ma %fr16,8(0,%r20)
+	nop
+	fstws,ma %fr15,8(0,%r20)
+	nop
+	fstws,ma %fr14,8(0,%r20)
+	nop
+	fstws,ma %fr13,8(0,%r20)
+	nop
+	fstws,ma %fr12,8(0,%r20)
+	nop
+L$0001
+	; Return, setting up a frame pointer in the delay slot
+	bv 0(%r31)
+	sub %r30,%r21,%r3
+
+	.EXIT
+	.PROCEND
+
+; This is an out-of-line epilogue.  It's operation is basically the reverse
+; of the out-of-line prologue.
+
+	.align 32
+	.NSUBSPA $MILLICODE$,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY
+	.EXPORT __outline_epilogue,MILLICODE
+__outline_epilogue
+	.PROC
+	.CALLINFO FRAME=0,NO_CALLS
+	.ENTRY
+	; Make a copy of our frame pointer into %r20
+	copy %r3,%r20
+
+	; Subtract 4 from our return pointer so that we return to
+	; the right location.
+        ldo -4(%r31),%r31
+
+	; Reload %r2
+	; First save off %r2
+	ldw -20(0,%r20),%r2
+
+	; Load our old stack pointer, save it in %r21.
+	ldw 0(0,%r20),%r21
+
+	; Add in local_fsize (%r19) to the frame pointer to find
+	; the saved registers.
+	add %r20,%r19,%r20
+
+	; %r22 tells us what registers we need to restore.  The upper half
+	; is for fp registers, the lower half for integer registers.
+	; We put the lower half in %r1 and the upper half into %r22
+	; for later use.
+	extru %r22,31,16,%r1
+	extrs %r22,15,16,%r22
+
+	; %r1 now olds a value 0-18 which corresponds to the number
+	; of grs we need to restore.  We need to reverse that value so
+	; we can just into the table and straight-line execute to the
+	; end of the gr restore.
+	comb,= %r0,%r1,L$0002
+	subi 18,%r1,%r1
+	blr,n %r1,%r0
+	b,n L$0002
+	ldws,ma 4(0,%r20),%r18
+	nop
+	ldws,ma 4(0,%r20),%r17
+	nop
+	ldws,ma 4(0,%r20),%r16
+	nop
+	ldws,ma 4(0,%r20),%r15
+	nop
+	ldws,ma 4(0,%r20),%r14
+	nop
+	ldws,ma 4(0,%r20),%r13
+	nop
+	ldws,ma 4(0,%r20),%r12
+	nop
+	ldws,ma 4(0,%r20),%r11
+	nop
+	ldws,ma 4(0,%r20),%r10
+	nop
+	ldws,ma 4(0,%r20),%r9
+	nop
+	ldws,ma 4(0,%r20),%r8
+	nop
+	ldws,ma 4(0,%r20),%r7
+	nop
+	ldws,ma 4(0,%r20),%r6
+	nop
+	ldws,ma 4(0,%r20),%r5
+	nop
+	ldws,ma 4(0,%r20),%r4
+	nop
+	ldws,ma 4(0,%r20),%r3
+	nop
+L$0002
+	; All gr restore are done.  Align the temporary frame pointer and
+	; do the fr restore.
+	ldo 7(%r20),%r20
+	depi 0,31,3,%r20
+
+	comb,= %r0,%r22,L$0003
+	subi 21,%r22,%r22
+	blr,n %r22,%r0
+	b,n L$0003
+	fldws,ma 8(0,%r20),%fr21
+	nop
+	fldws,ma 8(0,%r20),%fr20
+	nop
+	fldws,ma 8(0,%r20),%fr19
+	nop
+	fldws,ma 8(0,%r20),%fr18
+	nop
+	fldws,ma 8(0,%r20),%fr17
+	nop
+	fldws,ma 8(0,%r20),%fr16
+	nop
+	fldws,ma 8(0,%r20),%fr15
+	nop
+	fldws,ma 8(0,%r20),%fr14
+	nop
+	fldws,ma 8(0,%r20),%fr13
+	nop
+	fldws,ma 8(0,%r20),%fr12
+	nop
+L$0003
+	; Return and deallocate our frame.
+	bv 0(%r31)
+	copy %r21,%r30
+	.EXIT
+	.PROCEND
+