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Author SHA1 Message Date
Evandro Menezes 9fc54826e0 [AArch64] Compute the Newton series for reciprocals natively 
Implement the Newton series for square root, its reciprocal and reciprocal
natively using the specialized instructions in AArch64 to perform each
series iteration.

Differential revision: https://reviews.llvm.org/D26518

llvm-svn: 286907
 2016-11-14 23:29:01 +00:00
Evandro Menezes eff2bd9d4f [AArch64] Optionally use the Newton series for reciprocal estimation 
Add support for estimating the square root or its reciprocal and division or
reciprocal using the combiner generic Newton series.

Differential revision: https://reviews.llvm.org/D25291

llvm-svn: 284986
 2016-10-24 16:14:58 +00:00
Evandro Menezes ba4926efde Revert "[AArch64] Use the reciprocal estimation machinery" 
This reverts commit b7d42b0048f65346e9fa37fb65defeea7ce8c337 per request by
Eric Christopher <echristo@gmail.com> (v. http://bit.ly/2cmz6kW).

llvm-svn: 282000
 2016-09-20 19:02:06 +00:00
Evandro Menezes 61a1273d27 Revert "[AArch64] Properly validate the reciprocal estimation." 
This reverts commit ad8ca1528242e2a4cb363e3779309e70eb7a430e per request by
Eric Christopher <echristo@gmail.com> (v. http://bit.ly/2cmz6kW).

llvm-svn: 281999
 2016-09-20 19:02:02 +00:00
Evandro Menezes 238fa76574 [AArch64] Properly validate the reciprocal estimation. 
Add check for legal data types when expanding into a Newton series.

Differential Revision: https://reviews.llvm.org/D22267

llvm-svn: 276041
 2016-07-19 22:31:11 +00:00
Evandro Menezes bcb95cd0ed [AArch64] Use the reciprocal estimation machinery 
This patch adds support for estimating the square root, its reciprocal and
division or reciprocal using the combiner generic reciprocal machinery.

llvm-svn: 268539
 2016-05-04 20:18:27 +00:00