Commit ea506297 by Andreas Krebbel Committed by Ulrich Weigand

s390.c (s390_frame_info): Added alignment statement for floating point register area on stack.

2004-09-20  Andreas Krebbel  <krebbel1@de.ibm.com>

	* config/s390/s390.c (s390_frame_info): Added alignment statement for
	floating point register area on stack.

From-SVN: r87765
parent da89fba8
2004-09-20 Andreas Krebbel <krebbel1@de.ibm.com>
* config/s390/s390.c (s390_frame_info): Added alignment statement for
floating point register area on stack.
2004-09-20 Jakub Jelinek <jakub@redhat.com> 2004-09-20 Jakub Jelinek <jakub@redhat.com>
* predict.c (expr_expected_value): Use *_CLASS_P macros. * predict.c (expr_expected_value): Use *_CLASS_P macros.
......
...@@ -5958,8 +5958,11 @@ s390_frame_info (int base_used, int return_addr_used) ...@@ -5958,8 +5958,11 @@ s390_frame_info (int base_used, int return_addr_used)
} }
else else
{ {
/* On 31 bit we have to care about alignment of the
floating point regs to provide fastest access. */
cfun_frame_layout.f0_offset cfun_frame_layout.f0_offset
= (cfun_frame_layout.gprs_offset = ((cfun_frame_layout.gprs_offset
& ~(STACK_BOUNDARY / BITS_PER_UNIT - 1))
- 8 * (cfun_fpr_bit_p (0) + cfun_fpr_bit_p (1))); - 8 * (cfun_fpr_bit_p (0) + cfun_fpr_bit_p (1)));
cfun_frame_layout.f4_offset cfun_frame_layout.f4_offset
...@@ -5996,7 +5999,9 @@ s390_frame_info (int base_used, int return_addr_used) ...@@ -5996,7 +5999,9 @@ s390_frame_info (int base_used, int return_addr_used)
{ {
cfun_frame_layout.frame_size += (cfun_frame_layout.save_backchain_p cfun_frame_layout.frame_size += (cfun_frame_layout.save_backchain_p
* UNITS_PER_WORD); * UNITS_PER_WORD);
/* No alignment trouble here because f8-f15 are only saved under
64 bit. */
cfun_frame_layout.f8_offset = (MIN (MIN (cfun_frame_layout.f0_offset, cfun_frame_layout.f8_offset = (MIN (MIN (cfun_frame_layout.f0_offset,
cfun_frame_layout.f4_offset), cfun_frame_layout.f4_offset),
cfun_frame_layout.gprs_offset) cfun_frame_layout.gprs_offset)
...@@ -6009,6 +6014,9 @@ s390_frame_info (int base_used, int return_addr_used) ...@@ -6009,6 +6014,9 @@ s390_frame_info (int base_used, int return_addr_used)
cfun_frame_layout.frame_size += 8; cfun_frame_layout.frame_size += 8;
cfun_frame_layout.frame_size += cfun_gprs_save_area_size; cfun_frame_layout.frame_size += cfun_gprs_save_area_size;
/* If under 31 bit an odd number of gprs has to be saved we have to adjust
the frame size to sustain 8 byte alignment of stack frames. */
cfun_frame_layout.frame_size = ((cfun_frame_layout.frame_size + cfun_frame_layout.frame_size = ((cfun_frame_layout.frame_size +
STACK_BOUNDARY / BITS_PER_UNIT - 1) STACK_BOUNDARY / BITS_PER_UNIT - 1)
& ~(STACK_BOUNDARY / BITS_PER_UNIT - 1)); & ~(STACK_BOUNDARY / BITS_PER_UNIT - 1));
...@@ -7150,6 +7158,10 @@ s390_gimplify_va_arg (tree valist, tree type, tree *pre_p, ...@@ -7150,6 +7158,10 @@ s390_gimplify_va_arg (tree valist, tree type, tree *pre_p,
indirect_p = 1; indirect_p = 1;
reg = gpr; reg = gpr;
n_reg = 1; n_reg = 1;
/* TARGET_KERNEL_BACKCHAIN on 31 bit: It is assumed here that no padding
will be added by s390_frame_info because for va_args always an even
number of gprs has to be saved r15-r2 = 14 regs. */
sav_ofs = (TARGET_KERNEL_BACKCHAIN sav_ofs = (TARGET_KERNEL_BACKCHAIN
? (TARGET_64BIT ? 4 : 2) * 8 : 2 * UNITS_PER_WORD); ? (TARGET_64BIT ? 4 : 2) * 8 : 2 * UNITS_PER_WORD);
sav_scale = UNITS_PER_WORD; sav_scale = UNITS_PER_WORD;
...@@ -7185,6 +7197,10 @@ s390_gimplify_va_arg (tree valist, tree type, tree *pre_p, ...@@ -7185,6 +7197,10 @@ s390_gimplify_va_arg (tree valist, tree type, tree *pre_p,
indirect_p = 0; indirect_p = 0;
reg = gpr; reg = gpr;
n_reg = (size + UNITS_PER_WORD - 1) / UNITS_PER_WORD; n_reg = (size + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
/* TARGET_KERNEL_BACKCHAIN on 31 bit: It is assumed here that no padding
will be added by s390_frame_info because for va_args always an even
number of gprs has to be saved r15-r2 = 14 regs. */
sav_ofs = TARGET_KERNEL_BACKCHAIN ? sav_ofs = TARGET_KERNEL_BACKCHAIN ?
(TARGET_64BIT ? 4 : 2) * 8 : 2*UNITS_PER_WORD; (TARGET_64BIT ? 4 : 2) * 8 : 2*UNITS_PER_WORD;
......
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