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| author | Richard Stallman <rms@gnu.org> | 1993-05-31 06:08:41 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1993-05-31 06:08:41 +0000 |
| commit | 8d6f415e90f94dd0360c6f140744d92af3d3575f (patch) | |
| tree | 3502c3e2db1ea7d72740f844c457347de8bd7e2d | |
| parent | d0ca05efa9a42742551531350bbef921e0a5a0b8 (diff) | |
| download | gcc-8d6f415e90f94dd0360c6f140744d92af3d3575f.zip gcc-8d6f415e90f94dd0360c6f140744d92af3d3575f.tar.gz gcc-8d6f415e90f94dd0360c6f140744d92af3d3575f.tar.bz2 | |
(output_cbranch): In forward/long branch case...
(output_cbranch): In forward/long branch case, only
nullify if the delay slot was empty or if the delay slot
was explicitly nullified.
(output_bb): Likewise.
From-SVN: r4608
| -rw-r--r-- | gcc/config/pa/pa.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/gcc/config/pa/pa.c b/gcc/config/pa/pa.c index 6ab86b7..ff04b05 100644 --- a/gcc/config/pa/pa.c +++ b/gcc/config/pa/pa.c @@ -3225,10 +3225,13 @@ output_cbranch (operands, nullify, length, negated, insn) strcat (buf, "%S3"); else strcat (buf, "%B3"); - /* Regardless of whether or not this branch got its slot - filled we can nullify the following instruction and - avoid emitting a nop. */ - strcat (buf, " %2,%1,0\n\tbl%* %0,0"); + /* Nullify the delay slot if the delay slot was explicitly + nullified by the delay branch scheduler or if no insn + could be placed in the delay slot. */ + if (nullify) + strcat (buf, " %2,%1,0\n\tbl,n %0,0"); + else + strcat (buf, " %2,%1,0\n\tbl%* %0,0"); break; /* Long backward conditional branch with nullification. */ @@ -3308,10 +3311,14 @@ output_bb (operands, nullify, length, negated, insn, which) strcat (buf, "<"); else strcat (buf, ">="); - /* Regardless of whether or not this branch got its slot - filled we can nullify the following instruction and - avoid emitting a nop. */ - if (negated) + /* Nullify the delay slot if the delay slot was explicitly + nullified by the delay branch scheduler or if no insn + could be placed in the delay slot. */ + if (nullify && negated) + strcat (buf, " %0,%1,1,0\n\tbl,n %3,0"); + else if (nullify && ! negated) + strcat (buf, " %0,%1,1,0\n\tbl,n %2,0"); + else if (negated) strcat (buf, " %0,%1,1,0\n\tbl%* %3,0"); else strcat (buf, " %0,%1,1,0\n\tbl%* %2,0"); |