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| author | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-05-21 19:12:20 +0000 |
|---|---|---|
| committer | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-05-21 19:12:20 +0000 |
| commit | 3245cd4f3ecba3217d5d170fc67739415880e1cf (patch) | |
| tree | dd9220c69002dd9a1d5f1820be3e18c2112c0bec /gcc/config/i386/gas.h | |
| parent | aff4ad886056a6d7cda3c7dcd7bf6131b1100582 (diff) | |
| download | gcc-3245cd4f3ecba3217d5d170fc67739415880e1cf.tar.gz | |
* acconfig.h (HAVE_GAS_MAX_SKIP_P2ALIGN): New tag.
* configure.in: Check for it.
* i386/gas.h (ASM_OUTPUT_MAX_SKIP_ALIGN): Use it.
* final.c (uid_align, uid_shuid, label_align): Make static.
(label_align): Change type to struct label_alignment pointer.
(LABEL_TO_ALIGNMENT, shorten_branches): Update due to type change.
(LABEL_TO_MAX_SKIP): Define.
(LABEL_ALIGN_MAX_SKIP, LOOP_ALIGN_MAX_SKIP,
LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP): Provide defaults.
(shorten_branches): Record the maximum bytes to skip when
aligning a label.
(final_scan_insn): Use the maximum bytes to skip when aligning a label
if ASM_OUTPUT_MAX_SKIP_ALIGN is available.
* i386.h (LOOP_ALIGN_MAX_SKIP,
LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP): Define.
* i386.c (override_options): i386_align_jumps and i386_align_loops
default to 4 if ASM_OUTPUT_MAX_SKIP_ALIGN is available.
* invoke.texi: Document new i386 align-loops and align-jumps behavior.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@19933 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config/i386/gas.h')
| -rw-r--r-- | gcc/config/i386/gas.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/config/i386/gas.h b/gcc/config/i386/gas.h index 50976cf8bec..2da338a6518 100644 --- a/gcc/config/i386/gas.h +++ b/gcc/config/i386/gas.h @@ -85,6 +85,19 @@ Boston, MA 02111-1307, USA. */ #define ASM_OUTPUT_ALIGN(FILE,LOG) \ if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG)) #endif + +/* A C statement to output to the stdio stream FILE an assembler + command to advance the location counter to a multiple of 1<<LOG + bytes if it is within MAX_SKIP bytes. + + This is used to align code labels according to Intel recommendations. */ + +#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN +# define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \ + if ((LOG)!=0) \ + if ((MAX_SKIP)==0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ + else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)) +#endif /* A C statement or statements which output an assembler instruction opcode to the stdio stream STREAM. The macro-operand PTR is a |