diff options
| author | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2020-01-14 23:37:20 +0100 |
|---|---|---|
| committer | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2020-01-14 23:37:20 +0100 |
| commit | 9475c5637c5d650f43955abe8f995797893affe1 (patch) | |
| tree | a2993fa705e3d069ce280958df5e10f6f52d15fa /arm/Asmgen.v | |
| parent | b92d5a32c314eee0c68a70c33f1847545aabeb19 (diff) | |
| download | compcert-kvx-9475c5637c5d650f43955abe8f995797893affe1.tar.gz compcert-kvx-9475c5637c5d650f43955abe8f995797893affe1.zip | |
ARM generation of 2-instruction signed division by 2 (as opposed to 3-instruction)
Diffstat (limited to 'arm/Asmgen.v')
| -rw-r--r-- | arm/Asmgen.v | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arm/Asmgen.v b/arm/Asmgen.v index 1a1e7f2f..0ec0a4d0 100644 --- a/arm/Asmgen.v +++ b/arm/Asmgen.v @@ -481,6 +481,9 @@ Definition transl_op do r <- ireg_of res; do r1 <- ireg_of a1; if Int.eq n Int.zero then OK (Pmov r (SOreg r1) :: k) + else if Int.eq n Int.one then + OK (Padd IR14 r1 (SOlsr r1 (Int.repr 31)) :: + Pmov r (SOasr IR14 n) :: k) else OK (Pmov IR14 (SOasr r1 (Int.repr 31)) :: Padd IR14 r1 (SOlsr IR14 (Int.sub Int.iwordsize n)) :: |