diff options
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/m68k/m68k-protos.h | 1 | ||||
| -rw-r--r-- | gcc/config/m68k/m68k.c | 41 | ||||
| -rw-r--r-- | gcc/config/m68k/m68k.h | 6 | ||||
| -rw-r--r-- | gcc/config/m68k/m68k.md | 1 | ||||
| -rw-r--r-- | gcc/config/m68k/m68k.opt | 4 |
5 files changed, 50 insertions, 3 deletions
diff --git a/gcc/config/m68k/m68k-protos.h b/gcc/config/m68k/m68k-protos.h index 33025f8..596d4ec 100644 --- a/gcc/config/m68k/m68k-protos.h +++ b/gcc/config/m68k/m68k-protos.h @@ -50,6 +50,7 @@ extern bool strict_low_part_peephole_ok (enum machine_mode mode, rtx first_insn, extern int standard_68881_constant_p (rtx); extern void print_operand_address (FILE *, rtx); extern void print_operand (FILE *, rtx, int); +extern bool m68k_output_addr_const_extra (FILE *, rtx); extern void notice_update_cc (rtx, rtx); extern bool m68k_legitimate_base_reg_p (rtx, bool); extern bool m68k_legitimate_index_reg_p (rtx, bool); diff --git a/gcc/config/m68k/m68k.c b/gcc/config/m68k/m68k.c index 52a60da..a1437d2 100644 --- a/gcc/config/m68k/m68k.c +++ b/gcc/config/m68k/m68k.c @@ -2059,9 +2059,30 @@ legitimize_pic_address (rtx orig, enum machine_mode mode ATTRIBUTE_UNUSED, { gcc_assert (reg); - pic_ref = gen_rtx_MEM (Pmode, - gen_rtx_PLUS (Pmode, - pic_offset_table_rtx, orig)); + if (TARGET_COLDFIRE && TARGET_XGOT) + /* When compiling with -mxgot switch the code for the above + example will look like this: + + movel a5, a0 + addl _foo@GOT, a0 + movel a0@, a0 + movel #12345, a0@ */ + { + rtx pic_offset; + + /* Wrap ORIG in UNSPEC_GOTOFF to tip m68k_output_addr_const_extra + to put @GOT after reference. */ + pic_offset = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, orig), + UNSPEC_GOTOFF); + pic_offset = gen_rtx_CONST (Pmode, pic_offset); + emit_move_insn (reg, pic_offset); + emit_insn (gen_addsi3 (reg, reg, pic_offset_table_rtx)); + pic_ref = gen_rtx_MEM (Pmode, reg); + } + else + pic_ref = gen_rtx_MEM (Pmode, + gen_rtx_PLUS (Pmode, + pic_offset_table_rtx, orig)); crtl->uses_pic_offset_table = 1; MEM_READONLY_P (pic_ref) = 1; emit_move_insn (reg, pic_ref); @@ -3869,6 +3890,20 @@ print_operand (FILE *file, rtx op, int letter) } } +/* m68k implementation of OUTPUT_ADDR_CONST_EXTRA. */ + +bool +m68k_output_addr_const_extra (FILE *file, rtx x) +{ + if (GET_CODE (x) != UNSPEC || XINT (x, 1) != UNSPEC_GOTOFF) + return false; + + output_addr_const (file, XVECEXP (x, 0, 0)); + /* ??? What is the non-MOTOROLA syntax? */ + fputs ("@GOT", file); + return true; +} + /* A C compound statement to output to stdio stream STREAM the assembler syntax for an instruction operand that is a memory diff --git a/gcc/config/m68k/m68k.h b/gcc/config/m68k/m68k.h index 521ad84..7a68595 100644 --- a/gcc/config/m68k/m68k.h +++ b/gcc/config/m68k/m68k.h @@ -1079,6 +1079,12 @@ do { if (cc_prev_status.flags & CC_IN_68881) \ #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR) +#define OUTPUT_ADDR_CONST_EXTRA(FILE, X, FAIL) \ +do { \ + if (! m68k_output_addr_const_extra (FILE, (X))) \ + goto FAIL; \ +} while (0); + /* Values used in the MICROARCH argument to M68K_DEVICE. */ enum uarch_type { diff --git a/gcc/config/m68k/m68k.md b/gcc/config/m68k/m68k.md index 56c459e..9effb34 100644 --- a/gcc/config/m68k/m68k.md +++ b/gcc/config/m68k/m68k.md @@ -116,6 +116,7 @@ (UNSPEC_GOT 3) (UNSPEC_IB 4) (UNSPEC_TIE 5) + (UNSPEC_GOTOFF 6) ]) ;; UNSPEC_VOLATILE usage: diff --git a/gcc/config/m68k/m68k.opt b/gcc/config/m68k/m68k.opt index 23a3c09..bc0fb2c 100644 --- a/gcc/config/m68k/m68k.opt +++ b/gcc/config/m68k/m68k.opt @@ -178,3 +178,7 @@ Do not use unaligned memory references mtune= Target RejectNegative Joined Tune for the specified target CPU or architecture + +mxgot +Target Report Mask(XGOT) +Support more than 8192 GOT entries on ColdFire |