[SystemZ] Add support for TMHH, TMHL, TMLH and TMLL

For now just handles simple comparisons of an ANDed value with zero.
The CC value provides enough information to do any comparison for a
2-bit mask, and some nonzero comparisons with more populated masks,
but that's all future work.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189469 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/Target/SystemZ/SystemZ.h b/lib/Target/SystemZ/SystemZ.h
index ea6c7d17fa..051ba1dcfb 100644
--- a/lib/Target/SystemZ/SystemZ.h
+++ b/lib/Target/SystemZ/SystemZ.h
@@ -57,6 +57,13 @@ namespace llvm {
     const unsigned CCMASK_SRST_NOTFOUND = CCMASK_2;
     const unsigned CCMASK_SRST          = CCMASK_1 | CCMASK_2;
 
+    // Condition-code mask assignments for TEST UNDER MASK.
+    const unsigned CCMASK_TM_ALL_0       = CCMASK_0;
+    const unsigned CCMASK_TM_MIXED_MSB_0 = CCMASK_1;
+    const unsigned CCMASK_TM_MIXED_MSB_1 = CCMASK_2;
+    const unsigned CCMASK_TM_ALL_1       = CCMASK_3;
+    const unsigned CCMASK_TM             = CCMASK_ANY;
+
     // Mask assignments for PFD.
     const unsigned PFD_READ  = 1;
     const unsigned PFD_WRITE = 2;