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Fix bug when large stack frames (> 32k) are used, and saving both GP and FP registers. 

From-SVN: r2840
This commit is contained in:
Michael Meissner 1992-12-06 12:55:14 +00:00
parent 2649b2ee2e
commit 5251caf233
1 changed files with 15 additions and 15 deletions
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30
gcc/config/mips/mips.c
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@ -3914,7 +3914,7 @@ save_restore (file, gp_op, gp_2word_op, fp_op)
unsigned long fmask = current_frame_info.fmask;
unsigned long gp_offset;
unsigned long fp_offset;
unsigned long max_offset;
unsigned long min_offset;
char *base_reg;
if (mask == 0 && fmask == 0)
@ -3923,17 +3923,17 @@ save_restore (file, gp_op, gp_2word_op, fp_op)
base_reg = reg_names[STACK_POINTER_REGNUM];
gp_offset = current_frame_info.gp_sp_offset;
fp_offset = current_frame_info.fp_sp_offset;
max_offset = (gp_offset > fp_offset) ? gp_offset : fp_offset;
min_offset = (gp_offset < fp_offset && mask != 0) ? gp_offset : fp_offset;
/* Deal with calling functions with a large structure. */
if (max_offset >= 32768)
if (min_offset >= 32768)
{
char *temp = reg_names[MIPS_TEMP2_REGNUM];
fprintf (file, "\tli\t%s,%ld\n", temp, max_offset);
fprintf (file, "\tli\t%s,%ld\n", temp, min_offset);
fprintf (file, "\taddu\t%s,%s,%s\n", temp, temp, base_reg);
base_reg = temp;
gp_offset = max_offset - gp_offset;
fp_offset = max_offset - fp_offset;
gp_offset = min_offset - gp_offset;
fp_offset = min_offset - fp_offset;
}
/* Save registers starting from high to low. The debuggers prefer
@ -3982,28 +3982,28 @@ save_restore_insns (store_p)
int store_p; /* true if this is prologue */
{
int regno;
rtx base_reg_rtx = stack_pointer_rtx;
unsigned long mask = current_frame_info.mask;
unsigned long fmask = current_frame_info.fmask;
rtx base_reg_rtx = stack_pointer_rtx;
unsigned long mask = current_frame_info.mask;
unsigned long fmask = current_frame_info.fmask;
unsigned long gp_offset;
unsigned long fp_offset;
unsigned long max_offset;
unsigned long min_offset;
if (mask == 0 && fmask == 0)
return;
gp_offset = current_frame_info.gp_sp_offset;
fp_offset = current_frame_info.fp_sp_offset;
max_offset = (gp_offset > fp_offset) ? gp_offset : fp_offset;
min_offset = (gp_offset < fp_offset && mask != 0) ? gp_offset : fp_offset;
/* Deal with calling functions with a large structure. */
if (max_offset >= 32768)
if (min_offset >= 32768)
{
base_reg_rtx = gen_rtx (REG, Pmode, MIPS_TEMP2_REGNUM);
emit_move_insn (base_reg_rtx, GEN_INT (max_offset));
emit_move_insn (base_reg_rtx, GEN_INT (min_offset));
emit_insn (gen_addsi3 (base_reg_rtx, base_reg_rtx, stack_pointer_rtx));
gp_offset = max_offset - gp_offset;
fp_offset = max_offset - fp_offset;
gp_offset = min_offset - gp_offset;
fp_offset = min_offset - fp_offset;
}
/* Save registers starting from high to low. The debuggers prefer