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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2010-05-17 07:52:27 +0000 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@gcc.gnu.org> | 2010-05-17 07:52:27 +0000 |
| commit | 24a235c84f2a6d589e8a0d35121773232fcf787b (patch) | |
| tree | 52e1f759e31d104d3b48c29f881d46d29bfe7204 | |
| parent | 18252dcfaa504d6711e6d96a05a5c360b2b7078c (diff) | |
| download | gcc-24a235c84f2a6d589e8a0d35121773232fcf787b.zip gcc-24a235c84f2a6d589e8a0d35121773232fcf787b.tar.gz gcc-24a235c84f2a6d589e8a0d35121773232fcf787b.tar.bz2 | |
s390.c: Define sane prefetch settings and activate flag_prefetch_loop_arrays on -O3.
2010-05-17 Christian Borntraeger <borntraeger@de.ibm.com>
* config/s390/s390.c: Define sane prefetch settings and activate
flag_prefetch_loop_arrays on -O3.
* config/s390/s390.h: Declare that read can use write prefetch.
From-SVN: r159474
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/s390/s390.c | 16 | ||||
| -rw-r--r-- | gcc/config/s390/s390.h | 2 |
3 files changed, 24 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d4b4e50..7482a36 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2010-05-17 Christian Borntraeger <borntraeger@de.ibm.com> + + * config/s390/s390.c: Define sane prefetch settings and activate + flag_prefetch_loop_arrays on -O3. + * config/s390/s390.h: Declare that read can use write prefetch. + 2010-05-17 Jakub Jelinek <jakub@redhat.com> * lto-streamer-out.c (lto_output): Fix --enable-checking=release diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c index 858aac9..b660e36 100644 --- a/gcc/config/s390/s390.c +++ b/gcc/config/s390/s390.c @@ -1475,6 +1475,9 @@ optimization_options (int level ATTRIBUTE_UNUSED, int size ATTRIBUTE_UNUSED) without maintaining a stack frame back-chain. */ flag_asynchronous_unwind_tables = 1; + if (HAVE_prefetch || optimize >= 3) + flag_prefetch_loop_arrays = 1; + /* Use MVCLE instructions to decrease code size if requested. */ if (size != 0) target_flags |= MASK_MVCLE; @@ -1661,6 +1664,19 @@ override_options (void) } set_param_value ("max-pending-list-length", 256); + /* values for loop prefetching */ + set_param_value ("l1-cache-line-size", 256); + if (!PARAM_SET_P (PARAM_L1_CACHE_SIZE)) + set_param_value ("l1-cache-size", 128); + /* s390 has more than 2 levels and the size is much larger. Since + we are always running virtualized assume that we only get a small + part of the caches above l1. */ + if (!PARAM_SET_P (PARAM_L2_CACHE_SIZE)) + set_param_value ("l2-cache-size", 1500); + if (!PARAM_SET_P (PARAM_PREFETCH_MIN_INSN_TO_MEM_RATIO)) + set_param_value ("prefetch-min-insn-to-mem-ratio", 2); + if (!PARAM_SET_P (PARAM_SIMULTANEOUS_PREFETCHES)) + set_param_value ("simultaneous-prefetches", 6); } /* Map for smallest class containing reg regno. */ diff --git a/gcc/config/s390/s390.h b/gcc/config/s390/s390.h index 5acdd58..1d74d30 100644 --- a/gcc/config/s390/s390.h +++ b/gcc/config/s390/s390.h @@ -989,4 +989,6 @@ do { \ (TARGET_LONG_DISPLACEMENT? ((d) >= -524288 && (d) <= 524287) \ : ((d) >= 0 && (d) <= 4095)) +/* Reads can reuse write prefetches, used by tree-ssa-prefetch-loops.c. */ +#define READ_CAN_USE_WRITE_PREFETCH 1 #endif |