| commit | d5bf2b537e1192c67b3feab202b3850bafa03f95 | |
| author | wilco <wilco@138bc75d-0d04-0410-961f-82ee72b054a4> | |
| Fri, 16 Dec 2016 13:14:46 +0000 (16 13:14 +0000) | ||
| committer | wilco <wilco@138bc75d-0d04-0410-961f-82ee72b054a4> | |
| Fri, 16 Dec 2016 13:14:46 +0000 (16 13:14 +0000) | ||
| tree | 09edc8080838f8853d9e7cbeb41973402f229efa | treesnapshot (tar.gz zip) |
| parent | 588f2bfc7291aeabcbb47c942d4a4d41d2fb4bee | commitdiff |
The negdi2 patterns for ARM and Thumb-2 are duplicated because Thumb-2
doesn't support RSC with an immediate. We can however emulate RSC with
zero using a shifted SBC. If we add this to subsi3_carryin the negdi
patterns can be merged, simplifying things a bit. This should generate
identical code in all cases.
gcc/
* config/arm/arm.md (subsi3_carryin): Add Thumb-2 RSC #0.
(arm_negdi2) Rename to negdi2_insn, allow on Thumb-2.
* config/arm/thumb2.md (thumb2_negdi2): Remove pattern.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@243745 138bc75d-0d04-0410-961f-82ee72b054a4
doesn't support RSC with an immediate. We can however emulate RSC with
zero using a shifted SBC. If we add this to subsi3_carryin the negdi
patterns can be merged, simplifying things a bit. This should generate
identical code in all cases.
gcc/
* config/arm/arm.md (subsi3_carryin): Add Thumb-2 RSC #0.
(arm_negdi2) Rename to negdi2_insn, allow on Thumb-2.
* config/arm/thumb2.md (thumb2_negdi2): Remove pattern.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@243745 138bc75d-0d04-0410-961f-82ee72b054a4
| gcc/ChangeLog | diffblobblamehistory | |
| gcc/config/arm/arm.md | diffblobblamehistory | |
| gcc/config/arm/thumb2.md | diffblobblamehistory |