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i386.c (pentium4_cost, [...]): Update 32bit memcpy/memset decriptors.

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* config/i386/i386.c (pentium4_cost, nocona_cost): Update
	32bit memcpy/memset decriptors.
	(decide_alg): With -minline-all-stringops and sizes that are best
	to be copied via libcall still work hard enough to pick non-libcall
	strategy.

Co-Authored-By: Uros Bizjak <ubizjak@gmail.com>

From-SVN: r119445
This commit is contained in:
Jan Hubicka 2006-12-02 14:16:27 +01:00 committed by Jan Hubicka
parent 9c134b65cd
commit cc0faf9dc9
2 changed files with 24 additions and 9 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2006-11-30 Jan Hubicka <jh@suse.cz>
Uros Bizjak <ubizjak@gmail.com>
* config/i386/i386.c (pentium4_cost, nocona_cost): Update
32bit memcpy/memset decriptors.
(decide_alg): With -minline-all-stringops and sizes that are best
to be copied via libcall still work hard enough to pick non-libcall
strategy.
2006-12-02 Kazu Hirata <kazu@codesourcery.com>
* doc/extend.texi, doc/invoke.texi, doc/md.texi: Fix typos.

24
gcc/config/i386/i386.c
View File

@ -655,10 +655,11 @@ struct processor_costs pentium4_cost = {
COSTS_N_INSNS (2), /* cost of FABS instruction. */
COSTS_N_INSNS (2), /* cost of FCHS instruction. */
COSTS_N_INSNS (43), /* cost of FSQRT instruction. */
{{libcall, {{256, rep_prefix_4_byte}, {-1, libcall}}},
{libcall, {{256, rep_prefix_4_byte}, {-1, libcall}}}},
{{libcall, {{256, rep_prefix_4_byte}, {-1, libcall}}},
{libcall, {{256, rep_prefix_4_byte}, {-1, libcall}}}}
{{libcall, {{12, loop_1_byte}, {64, loop}, {-1, rep_prefix_4_byte}}},
DUMMY_STRINGOP_ALGS},
{{libcall, {{6, loop_1_byte}, {64, loop}, {20480, rep_prefix_4_byte},
{-1, libcall}}},
DUMMY_STRINGOP_ALGS},
};
static const
@ -712,10 +713,11 @@ struct processor_costs nocona_cost = {
COSTS_N_INSNS (3), /* cost of FABS instruction. */
COSTS_N_INSNS (3), /* cost of FCHS instruction. */
COSTS_N_INSNS (44), /* cost of FSQRT instruction. */
{{libcall, {{256, rep_prefix_4_byte}, {-1, libcall}}},
{{libcall, {{12, loop_1_byte}, {64, loop}, {-1, rep_prefix_4_byte}}},
{libcall, {{32, loop}, {20000, rep_prefix_8_byte},
{100000, unrolled_loop}, {-1, libcall}}}},
{{libcall, {{256, rep_prefix_4_byte}, {-1, libcall}}},
{{libcall, {{6, loop_1_byte}, {64, loop}, {20480, rep_prefix_4_byte},
{-1, libcall}}},
{libcall, {{24, loop}, {64, unrolled_loop},
{8192, rep_prefix_8_byte}, {-1, libcall}}}}
};
@ -13507,14 +13509,18 @@ decide_alg (HOST_WIDE_INT count, HOST_WIDE_INT expected_size, bool memset,
last non-libcall inline algorithm. */
if (TARGET_INLINE_ALL_STRINGOPS)
{
gcc_assert (alg != libcall);
return alg;
/* When the current size is best to be copied by a libcall,
but we are still forced to inline, run the heuristic bellow
that will pick code for medium sized blocks. */
if (alg != libcall)
return alg;
break;
}
else
return algs->size[i].alg;
}
}
gcc_unreachable ();
gcc_assert (TARGET_INLINE_ALL_STRINGOPS);
}
/* When asked to inline the call anyway, try to pick meaningful choice.
We look for maximal size of block that is faster to copy by hand and