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| author | Martin Liska <mliska@suse.cz> | 2020-06-01 13:21:40 +0200 |
|---|---|---|
| committer | Martin Liska <mliska@suse.cz> | 2020-07-30 10:31:36 +0200 |
| commit | dc65aba7a4725d1b464c8c64a5f739ee910e8943 (patch) | |
| tree | d09b112c9faf96dec7c972b1b4338c2ebe381ea3 /gcc/config/i386 | |
| parent | da346efd27eca48a8fe2e07d7e18b2c77ead0e2d (diff) | |
| download | gcc-dc65aba7a4725d1b464c8c64a5f739ee910e8943.zip gcc-dc65aba7a4725d1b464c8c64a5f739ee910e8943.tar.gz gcc-dc65aba7a4725d1b464c8c64a5f739ee910e8943.tar.bz2 | |
Tune memcpy and memset for Zen cores.
Based on the collected numbers in PR95435, I suggest the following
tuning changes:
gcc/ChangeLog:
PR target/95435
* config/i386/x86-tune-costs.h: Use libcall for large sizes for
-m32. Start using libcall from 128+ bytes.
Diffstat (limited to 'gcc/config/i386')
| -rw-r--r-- | gcc/config/i386/x86-tune-costs.h | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/gcc/config/i386/x86-tune-costs.h b/gcc/config/i386/x86-tune-costs.h index 1169178..3207404 100644 --- a/gcc/config/i386/x86-tune-costs.h +++ b/gcc/config/i386/x86-tune-costs.h @@ -1314,20 +1314,20 @@ static stringop_algs znver1_memcpy[2] = { /* 32-bit tuning. */ {libcall, {{6, loop, false}, {14, unrolled_loop, false}, - {-1, rep_prefix_4_byte, false}}}, + {-1, libcall, false}}}, /* 64-bit tuning. */ {libcall, {{16, loop, false}, - {8192, rep_prefix_8_byte, false}, + {128, rep_prefix_8_byte, false}, {-1, libcall, false}}}}; static stringop_algs znver1_memset[2] = { /* 32-bit tuning. */ {libcall, {{8, loop, false}, {24, unrolled_loop, false}, - {2048, rep_prefix_4_byte, false}, + {128, rep_prefix_4_byte, false}, {-1, libcall, false}}}, /* 64-bit tuning. */ {libcall, {{48, unrolled_loop, false}, - {8192, rep_prefix_8_byte, false}, + {128, rep_prefix_8_byte, false}, {-1, libcall, false}}}}; struct processor_costs znver1_cost = { { @@ -1460,7 +1460,7 @@ static stringop_algs znver2_memcpy[2] = { /* 32-bit tuning. */ {libcall, {{6, loop, false}, {14, unrolled_loop, false}, - {-1, rep_prefix_4_byte, false}}}, + {-1, libcall, false}}}, /* 64-bit tuning. */ {libcall, {{16, loop, false}, {64, rep_prefix_4_byte, false}, @@ -1469,7 +1469,7 @@ static stringop_algs znver2_memset[2] = { /* 32-bit tuning. */ {libcall, {{8, loop, false}, {24, unrolled_loop, false}, - {2048, rep_prefix_4_byte, false} + {128, rep_prefix_4_byte, false}, {-1, libcall, false}}}, /* 64-bit tuning. */ {libcall, {{24, rep_prefix_4_byte, false}, |