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| author | Bingfeng Mei <bmei@broadcom.com> | 2014-01-29 10:10:20 +0000 |
|---|---|---|
| committer | Bingfeng Mei <meibf@gcc.gnu.org> | 2014-01-29 10:10:20 +0000 |
| commit | 4a271b7ef041cd9e8fdcb3c1a8139fe704500d78 (patch) | |
| tree | 64d7a8574d55d7dfd5addc051e6c7d6378e7657b /gcc | |
| parent | 3d54b29d70cca0ae952f3fed9423c3acb28778a5 (diff) | |
| download | gcc-4a271b7ef041cd9e8fdcb3c1a8139fe704500d78.zip gcc-4a271b7ef041cd9e8fdcb3c1a8139fe704500d78.tar.gz gcc-4a271b7ef041cd9e8fdcb3c1a8139fe704500d78.tar.bz2 | |
md.texi: Mention that a target shouldn't implement vec_widen_(s|u)mul_even/odd pair if...
2014-01-29 Bingfeng Mei <bmei@broadcom.com>
* doc/md.texi: Mention that a target shouldn't implement
vec_widen_(s|u)mul_even/odd pair if it is less efficient
than hi/lo pair.
From-SVN: r207228
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/doc/md.texi | 3 |
2 files changed, 8 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ddf3595..1dd3a58 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2014-01-29 Bingfeng Mei <bmei@broadcom.com> + + * doc/md.texi: Mention that a target shouldn't implement + vec_widen_(s|u)mul_even/odd pair if it is less efficient + than hi/lo pair. + 2014-01-29 Jakub Jelinek <jakub@redhat.com> PR tree-optimization/59594 diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi index dddff7fe..746acc2 100644 --- a/gcc/doc/md.texi +++ b/gcc/doc/md.texi @@ -4918,7 +4918,8 @@ the output vector (operand 0). Signed/Unsigned widening multiplication. The two inputs (operands 1 and 2) are vectors with N signed/unsigned elements of size S@. Multiply the high/low or even/odd elements of the two vectors, and put the N/2 products of size 2*S -in the output vector (operand 0). +in the output vector (operand 0). A target shouldn't implement even/odd pattern +pair if it is less efficient than lo/hi one. @cindex @code{vec_widen_ushiftl_hi_@var{m}} instruction pattern @cindex @code{vec_widen_ushiftl_lo_@var{m}} instruction pattern |