GNU Info

(gcc-295.info)Alignment Output

---

Prev: Exception Region Output Up: Assembler Format

---

Enter node , (file) or (file)node

Assembler Commands for Alignment
--------------------------------

   This describes commands for alignment.

`LABEL_ALIGN_AFTER_BARRIER (LABEL)'
     The alignment (log base 2) to put in front of LABEL, which follows
     a BARRIER.

     This macro need not be defined if you don't want any special
     alignment to be done at such a time.  Most machine descriptions do
     not currently define the macro.

`LOOP_ALIGN (LABEL)'
     The alignment (log base 2) to put in front of LABEL, which follows
     a NOTE_INSN_LOOP_BEG note.

     This macro need not be defined if you don't want any special
     alignment to be done at such a time.  Most machine descriptions do
     not currently define the macro.

`LABEL_ALIGN (LABEL)'
     The alignment (log base 2) to put in front of LABEL.  If
     LABEL_ALIGN_AFTER_BARRIER / LOOP_ALIGN specify a different
     alignment, the maximum of the specified values is used.

`ASM_OUTPUT_SKIP (STREAM, NBYTES)'
     A C statement to output to the stdio stream STREAM an assembler
     instruction to advance the location counter by NBYTES bytes.
     Those bytes should be zero when loaded.  NBYTES will be a C
     expression of type `int'.

`ASM_NO_SKIP_IN_TEXT'
     Define this macro if `ASM_OUTPUT_SKIP' should not be used in the
     text section because it fails to put zeros in the bytes that are
     skipped.  This is true on many Unix systems, where the pseudo-op
     to skip bytes produces no-op instructions rather than zeros when
     used in the text section.

`ASM_OUTPUT_ALIGN (STREAM, POWER)'
     A C statement to output to the stdio stream STREAM an assembler
     command to advance the location counter to a multiple of 2 to the
     POWER bytes.  POWER will be a C expression of type `int'.

`ASM_OUTPUT_MAX_SKIP_ALIGN (STREAM, POWER, MAX_SKIP)'
     A C statement to output to the stdio stream STREAM an assembler
     command to advance the location counter to a multiple of 2 to the
     POWER bytes, but only if MAX_SKIP or fewer bytes are needed to
     satisfy the alignment request.  POWER and MAX_SKIP will be a C
     expression of type `int'.