+Mon Apr 27 18:23:51 1998 J"orn Rennecke <amylaar@cygnus.co.uk>
+
+ * sh.c (sh_expand_prologue, sh_expand_epilogue):
+ If TARGET_DOUBLE_ALIGN, preserve 64 bit stack alignment.
+ * sh.h (STACK_BOUNDARY): Likewise.
+
Mon Apr 27 17:22:48 1998 J"orn Rennecke <amylaar@cygnus.co.uk>
* sh.h (LEGITIMIZE_RELOAD_ADDRESS): Define.
int live_regs_mask;
int d, i;
int live_regs_mask2;
+ int double_align = 0;
/* We have pretend args if we had an object sent partially in registers
and partially on the stack, e.g. a large structure. */
live_regs_mask = calc_live_regs (&d, &live_regs_mask2);
push_regs (live_regs_mask, live_regs_mask2);
- output_stack_adjust (-get_frame_size (), stack_pointer_rtx, 3);
+ if (TARGET_ALIGN_DOUBLE && d & 1)
+ double_align = 4;
+
+ output_stack_adjust (-get_frame_size () - double_align,
+ stack_pointer_rtx, 3);
if (frame_pointer_needed)
emit_insn (gen_movsi (frame_pointer_rtx, stack_pointer_rtx));
int d, i;
int live_regs_mask2;
+ int frame_size = get_frame_size ();
+
+ live_regs_mask = calc_live_regs (&d, &live_regs_mask2);
+
+ if (TARGET_ALIGN_DOUBLE && d & 1)
+ frame_size += 4;
if (frame_pointer_needed)
{
- output_stack_adjust (get_frame_size (), frame_pointer_rtx, 7);
+ output_stack_adjust (frame_size, frame_pointer_rtx, 7);
/* We must avoid moving the stack pointer adjustment past code
which reads from the local frame, else an interrupt could
emit_insn (gen_blockage ());
emit_insn (gen_movsi (stack_pointer_rtx, frame_pointer_rtx));
}
- else if (get_frame_size ())
+ else if (frame_size)
{
/* We must avoid moving the stack pointer adjustment past code
which reads from the local frame, else an interrupt could
occur after the SP adjustment and clobber data in the local
frame. */
emit_insn (gen_blockage ());
- output_stack_adjust (get_frame_size (), stack_pointer_rtx, 7);
+ output_stack_adjust (frame_size, stack_pointer_rtx, 7);
}
/* Pop all the registers. */
-mrelax -mh -ms -mint32 -malign-300
@emph{SH Options}
--m1 -m2 -m3 -m3e -mb -ml -mrelax
+-m1 -m2 -m3 -m3e -mb -ml -mdalign -mrelax
@emph{System V Options}
-Qy -Qn -YP,@var{paths} -Ym,@var{dir}
@item -ml
Compile code for the processor in little endian mode.
+@item -mdalign
+Align doubles at 64 bit boundaries. Note that this changes the calling
+conventions, and thus some functions from the standard C library will
+not work unless you recompile it first with -mdalign.
+
@item -mrelax
Shorten some address references at link time, when possible; uses the
linker option @samp{-relax}.