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| author | Evgeny Stupachenko <evstupac@gmail.com> | 2014-04-17 07:47:37 +0000 |
|---|---|---|
| committer | Kirill Yukhin <kyukhin@gcc.gnu.org> | 2014-04-17 07:47:37 +0000 |
| commit | 170c1776c45f875d346519a06514d510b0905fa8 (patch) | |
| tree | ab64c63326f988f34afd2f448449b18d1890b461 /gcc | |
| parent | a4ef7f3e579651f4007cdadf0d7c2a1c25706201 (diff) | |
| download | gcc-170c1776c45f875d346519a06514d510b0905fa8.zip gcc-170c1776c45f875d346519a06514d510b0905fa8.tar.gz gcc-170c1776c45f875d346519a06514d510b0905fa8.tar.bz2 | |
i386.c (x86_add_stmt_cost): Fix vector cost model for Silvermont.
gcc/
* config/i386/i386.c (x86_add_stmt_cost): Fix vector cost model for
Silvermont.
From-SVN: r209466
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/i386/i386.c | 13 |
2 files changed, 18 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c6fa5c0..320e15a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2014-04-17 Evgeny Stupachenko <evstupac@gmail.com> + * config/i386/i386.c (x86_add_stmt_cost): Fix vector cost model for + Silvermont. + +2014-04-17 Evgeny Stupachenko <evstupac@gmail.com> + * config/i386/x86-tune.def (TARGET_SLOW_PSHUFB): New tune definition. * config/i386/i386.h (TARGET_SLOW_PSHUFB): New tune flag. * config/i386/i386.c (expand_vec_perm_even_odd_1): Avoid byte shuffles diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 0ae3cda..88142a8 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -81,6 +81,7 @@ along with GCC; see the file COPYING3. If not see #include "context.h" #include "pass_manager.h" #include "target-globals.h" +#include "tree-vectorizer.h" static rtx legitimize_dllimport_symbol (rtx, bool); static rtx legitimize_pe_coff_extern_decl (rtx, bool); @@ -46329,6 +46330,18 @@ ix86_add_stmt_cost (void *data, int count, enum vect_cost_for_stmt kind, count *= 50; /* FIXME. */ retval = (unsigned) (count * stmt_cost); + + /* We need to multiply all vector stmt cost by 1.7 (estimated cost) + for Silvermont as it has out of order integer pipeline and can execute + 2 scalar instruction per tick, but has in order SIMD pipeline. */ + if (TARGET_SILVERMONT || TARGET_INTEL) + if (stmt_info && stmt_info->stmt) + { + tree lhs_op = gimple_get_lhs (stmt_info->stmt); + if (lhs_op && TREE_CODE (TREE_TYPE (lhs_op)) == INTEGER_TYPE) + retval = (retval * 17) / 10; + } + cost[where] += retval; return retval; |