diff options
Diffstat (limited to 'gcc/config/rs6000/rs6000.c')
| -rw-r--r-- | gcc/config/rs6000/rs6000.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index 250c8cd..a8db6d0 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -4176,6 +4176,53 @@ rs6000_allocate_stack_space (file, size, copy_r12) int copy_r12; { int neg_size = -size; + + if (current_function_limit_stack) + { + if (REG_P (stack_limit_rtx) + && REGNO (stack_limit_rtx) > 1 + && REGNO (stack_limit_rtx) <= 31) + { + if (size <= 32767) + asm_fprintf (file, "\t{cal %s,%d(%s)|addi %s,%s,%d}\n", + reg_names[0], reg_names[REGNO (stack_limit_rtx)], + size); + else + { + asm_fprintf (file, "\t{cau|addis} %s,%s,0x%x\n", + reg_names[0], reg_names[REGNO (stack_limit_rtx)], + ((size + 0x8000) >> 16) & 0xffff); + asm_fprintf (file, "\t{ai|addic} %s,%s,%d\n", + reg_names[0], reg_names[0], + (size & 0x7fff) | -(size & 0x8000)); + } + if (TARGET_32BIT) + asm_fprintf (file, "\t{t|tw}llt %s,%s\n", + reg_names[1], reg_names[0]); + else + asm_fprintf (file, "\ttdllt %s,%s\n", reg_names[1], reg_names[0]); + } + else if (GET_CODE (stack_limit_rtx) == SYMBOL_REF + && (DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS)) + { + char * l_name = XSTR (stack_limit_rtx, 0); + const char * stripped_name; + + STRIP_NAME_ENCODING (stripped_name, l_name); + asm_fprintf (file, "\t{liu|lis} %s,%s@ha+%d\n", + reg_names[0], stripped_name, size); + asm_fprintf (file, "\t{ai|addic} %s,%s,%s@l+%d\n", + reg_names[0], reg_names[0], stripped_name, size); + if (TARGET_32BIT) + asm_fprintf (file, "\t{t|tw}llt %s,%s\n", + reg_names[1], reg_names[0]); + else + asm_fprintf (file, "\ttdllt %s,%s\n", reg_names[1], reg_names[0]); + } + else + warning ("stack limit expression is not supported"); + } + if (TARGET_UPDATE) { if (size < 32767) |