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| author | Joel Hestness <hestness@cs.wisc.edu> | 2013-01-19 15:14:54 -0600 |
|---|---|---|
| committer | Joel Hestness <hestness@cs.wisc.edu> | 2013-01-19 15:14:54 -0600 |
| commit | 1429d2124406440946fbe80a6e9dfe1148f3af91 (patch) | |
| tree | df4374a90a4362151821b17b6a2f7cd3056a8a7f /src/cpu/o3 | |
| parent | 5b6f972750f8e9288e81f30d69aecfe1f1960f06 (diff) | |
| download | gem5-1429d2124406440946fbe80a6e9dfe1148f3af91.tar.xz | |
O3 IEW: Make incrWb and decrWb clearer
Move the increment/decrement of wbOutstanding outside of the comparison
in incrWb and decrWb in the IEW. This also fixes a compiler bug with gcc
4.4.7, which incorrectly optimizes "-- ==" as "-=".
Diffstat (limited to 'src/cpu/o3')
| -rw-r--r-- | src/cpu/o3/iew.hh | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/cpu/o3/iew.hh b/src/cpu/o3/iew.hh index 5adf32752..1213cf12b 100644 --- a/src/cpu/o3/iew.hh +++ b/src/cpu/o3/iew.hh @@ -213,7 +213,8 @@ class DefaultIEW void incrWb(InstSeqNum &sn) { - if (++wbOutstanding == wbMax) + ++wbOutstanding; + if (wbOutstanding == wbMax) ableToIssue = false; DPRINTF(IEW, "wbOutstanding: %i [sn:%lli]\n", wbOutstanding, sn); assert(wbOutstanding <= wbMax); @@ -224,8 +225,9 @@ class DefaultIEW void decrWb(InstSeqNum &sn) { - if (wbOutstanding-- == wbMax) + if (wbOutstanding == wbMax) ableToIssue = true; + wbOutstanding--; DPRINTF(IEW, "wbOutstanding: %i [sn:%lli]\n", wbOutstanding, sn); assert(wbOutstanding >= 0); #ifdef DEBUG |