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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
This commit is contained in:
Aaron Sawdey 2019-01-03 19:20:57 +00:00 committed by Aaron Sawdey
parent 5c571497e1
commit 19db0ebb16
2 changed files with 27 additions and 2 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
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.
2019-01-03 Tom de Vries <tdevries@suse.de> 2019-01-03 Tom de Vries <tdevries@suse.de>
* config/nvptx/nvptx.c (MACH_VECTOR_LENGTH, MACH_MAX_WORKERS): Define. * config/nvptx/nvptx.c (MACH_VECTOR_LENGTH, MACH_MAX_WORKERS): Define.

23
gcc/config/rs6000/rs6000-string.c
View File

@ -2669,6 +2669,25 @@ expand_strn_compare (rtx operands[], int no_length)
return true; 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 /* Expand a block move operation, and return 1 if successful. Return 0
if we should let the compiler generate normal code. 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 /* Altivec first, since it will be faster than a string move
when it applies, and usually not significantly larger. */ 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; move_bytes = 16;
mode = V4SImode; mode = V4SImode;
gen_func.mov = gen_movv4si; gen_func.mov = gen_lvx_v4si_move;
} }
else if (bytes >= 8 && TARGET_POWERPC64 else if (bytes >= 8 && TARGET_POWERPC64
&& (align >= 64 || !STRICT_ALIGNMENT)) && (align >= 64 || !STRICT_ALIGNMENT))