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| author | Aaron Sawdey <acsawdey@linux.ibm.com> | 2019-01-03 19:20:57 +0000 |
|---|---|---|
| committer | Aaron Sawdey <acsawdey@gcc.gnu.org> | 2019-01-03 13:20:57 -0600 |
| commit | 19db0ebb16b4df01c536e108257bab81e0b1dabd (patch) | |
| tree | 2af5e2fb49656d8a262aeb76ac1a58536e6dafd2 /gcc/config | |
| parent | 5c571497e1b9b4ac407aa0db359292b0de6cd42e (diff) | |
| download | gcc-19db0ebb16b4df01c536e108257bab81e0b1dabd.zip gcc-19db0ebb16b4df01c536e108257bab81e0b1dabd.tar.gz gcc-19db0ebb16b4df01c536e108257bab81e0b1dabd.tar.bz2 | |
rs6000-string.c (expand_block_move): Don't use unaligned vsx and avoid lxvd2x/stxvd2x.
2019-01-03 Aaron Sawdey <acsawdey@linux.ibm.com>
* config/rs6000/rs6000-string.c (expand_block_move): Don't use
unaligned vsx and avoid lxvd2x/stxvd2x.
(gen_lvx_v4si_move): New function.
From-SVN: r267562
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/rs6000/rs6000-string.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/gcc/config/rs6000/rs6000-string.c b/gcc/config/rs6000/rs6000-string.c index f370397..37e19ed 100644 --- a/gcc/config/rs6000/rs6000-string.c +++ b/gcc/config/rs6000/rs6000-string.c @@ -2669,6 +2669,25 @@ expand_strn_compare (rtx operands[], int no_length) return true; } +/* Generate loads and stores for a move of v4si mode using lvx/stvx. + This uses altivec_{l,st}vx_<mode>_internal which use unspecs to + keep combine from changing what instruction gets used. + + DEST is the destination for the data. + SRC is the source of the data for the move. */ + +static rtx +gen_lvx_v4si_move (rtx dest, rtx src) +{ + gcc_assert (MEM_P (dest) ^ MEM_P (src)); + gcc_assert (GET_MODE (dest) == V4SImode && GET_MODE (src) == V4SImode); + + if (MEM_P (dest)) + return gen_altivec_stvx_v4si_internal (dest, src); + else + return gen_altivec_lvx_v4si_internal (dest, src); +} + /* Expand a block move operation, and return 1 if successful. Return 0 if we should let the compiler generate normal code. @@ -2721,11 +2740,11 @@ expand_block_move (rtx operands[]) /* Altivec first, since it will be faster than a string move when it applies, and usually not significantly larger. */ - if (TARGET_ALTIVEC && bytes >= 16 && (TARGET_EFFICIENT_UNALIGNED_VSX || align >= 128)) + if (TARGET_ALTIVEC && bytes >= 16 && align >= 128) { move_bytes = 16; mode = V4SImode; - gen_func.mov = gen_movv4si; + gen_func.mov = gen_lvx_v4si_move; } else if (bytes >= 8 && TARGET_POWERPC64 && (align >= 64 || !STRICT_ALIGNMENT)) |