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Fix determination of when two instructions can be combined in parallel.

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This commit is contained in:
Nick Clifton
1998-01-29 00:29:37 +00:00
parent 241b462435
commit ed29580469
2 changed files with 17 additions and 12 deletions
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7
gas/ChangeLog
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@ -1,3 +1,10 @@
start-sanitize-m32rx
Wed Jan 28 16:27:27 1998 Nick Clifton <nickc@cygnus.com>
* config/tc-m32r.c (md_assemble): Fix determination of when
instructions can be combined in parallel.
end-sanitize-m32rx
Wed Jan 28 14:35:00 1998 Bill Moyer <billm@cygnus.com> Wed Jan 28 14:35:00 1998 Bill Moyer <billm@cygnus.com>
* as.h (flag_warn_suppress_instructionswap): added new flag. * as.h (flag_warn_suppress_instructionswap): added new flag.

22
gas/config/tc-m32r.c
View File

@ -746,21 +746,19 @@ md_assemble (str)
previous instruction to make one, parallel, 32 bit instruction. previous instruction to make one, parallel, 32 bit instruction.
If the previous instruction (potentially) changed the flow of If the previous instruction (potentially) changed the flow of
program control, then it cannot be combined with the current program control, then it cannot be combined with the current
instruction, otherwise call can_make_parallel() with both instruction. Also if the output of the previous instruction
is used as an input to the current instruction then it cannot
be combined. Otherwise call can_make_parallel() with both
orderings of the instructions to see if they can be combined. */ orderings of the instructions to see if they can be combined. */
if ( ! CGEN_INSN_ATTR (prev_insn.insn, CGEN_INSN_COND_CTI) if ( ! CGEN_INSN_ATTR (prev_insn.insn, CGEN_INSN_COND_CTI)
&& ! CGEN_INSN_ATTR (prev_insn.insn, CGEN_INSN_UNCOND_CTI)) && ! CGEN_INSN_ATTR (prev_insn.insn, CGEN_INSN_UNCOND_CTI)
&& check_parallel_io_clash (& prev_insn, &insn)
)
{ {
if (can_make_parallel (& prev_insn, & insn) == NULL if (can_make_parallel (& prev_insn, & insn) == NULL)
&& check_parallel_io_clash (& prev_insn, &insn)) make_parallel (insn.buffer);
{ else if (can_make_parallel (& insn, & prev_insn.insn) == NULL)
make_parallel (insn.buffer); swap = true;
}
else if (can_make_parallel (& insn, & prev_insn.insn) == NULL
&& check_parallel_io_clash (& insn, & prev_insn))
{
swap = true;
}
} }
/* end-sanitize-phase2-m32rx */ /* end-sanitize-phase2-m32rx */
/* end-sanitize-m32rx */ /* end-sanitize-m32rx */