[SystemZ] Utilize Test Data Class instructions.
This adds a new SystemZ-specific intrinsic, llvm.s390.tdc.f(32|64|128),
which maps straight to the test data class instructions. A new IR pass
is added to recognize instructions that can be converted to TDC and
perform the necessary replacements.
Differential Revision: http://reviews.llvm.org/D21949
llvm-svn: 275016
diff --git a/llvm/lib/Target/SystemZ/SystemZ.h b/llvm/lib/Target/SystemZ/SystemZ.h
index cafe2c5..c8ea964 100644
--- a/llvm/lib/Target/SystemZ/SystemZ.h
+++ b/llvm/lib/Target/SystemZ/SystemZ.h
@@ -87,6 +87,11 @@
const unsigned CCMASK_VCMP_NONE = CCMASK_3;
const unsigned CCMASK_VCMP = CCMASK_0 | CCMASK_1 | CCMASK_3;
+// Condition-code mask assignments for Test Data Class.
+const unsigned CCMASK_TDC_NOMATCH = CCMASK_0;
+const unsigned CCMASK_TDC_MATCH = CCMASK_1;
+const unsigned CCMASK_TDC = CCMASK_TDC_NOMATCH | CCMASK_TDC_MATCH;
+
// The position of the low CC bit in an IPM result.
const unsigned IPM_CC = 28;
@@ -94,6 +99,41 @@
const unsigned PFD_READ = 1;
const unsigned PFD_WRITE = 2;
+// Mask assignments for TDC
+const unsigned TDCMASK_ZERO_PLUS = 0x800;
+const unsigned TDCMASK_ZERO_MINUS = 0x400;
+const unsigned TDCMASK_NORMAL_PLUS = 0x200;
+const unsigned TDCMASK_NORMAL_MINUS = 0x100;
+const unsigned TDCMASK_SUBNORMAL_PLUS = 0x080;
+const unsigned TDCMASK_SUBNORMAL_MINUS = 0x040;
+const unsigned TDCMASK_INFINITY_PLUS = 0x020;
+const unsigned TDCMASK_INFINITY_MINUS = 0x010;
+const unsigned TDCMASK_QNAN_PLUS = 0x008;
+const unsigned TDCMASK_QNAN_MINUS = 0x004;
+const unsigned TDCMASK_SNAN_PLUS = 0x002;
+const unsigned TDCMASK_SNAN_MINUS = 0x001;
+
+const unsigned TDCMASK_ZERO = TDCMASK_ZERO_PLUS | TDCMASK_ZERO_MINUS;
+const unsigned TDCMASK_POSITIVE = TDCMASK_NORMAL_PLUS |
+ TDCMASK_SUBNORMAL_PLUS |
+ TDCMASK_INFINITY_PLUS;
+const unsigned TDCMASK_NEGATIVE = TDCMASK_NORMAL_MINUS |
+ TDCMASK_SUBNORMAL_MINUS |
+ TDCMASK_INFINITY_MINUS;
+const unsigned TDCMASK_NAN = TDCMASK_QNAN_PLUS |
+ TDCMASK_QNAN_MINUS |
+ TDCMASK_SNAN_PLUS |
+ TDCMASK_SNAN_MINUS;
+const unsigned TDCMASK_PLUS = TDCMASK_POSITIVE |
+ TDCMASK_ZERO_PLUS |
+ TDCMASK_QNAN_PLUS |
+ TDCMASK_SNAN_PLUS;
+const unsigned TDCMASK_MINUS = TDCMASK_NEGATIVE |
+ TDCMASK_ZERO_MINUS |
+ TDCMASK_QNAN_MINUS |
+ TDCMASK_SNAN_MINUS;
+const unsigned TDCMASK_ALL = TDCMASK_PLUS | TDCMASK_MINUS;
+
// Number of bits in a vector register.
const unsigned VectorBits = 128;
@@ -138,6 +178,7 @@
FunctionPass *createSystemZShortenInstPass(SystemZTargetMachine &TM);
FunctionPass *createSystemZLongBranchPass(SystemZTargetMachine &TM);
FunctionPass *createSystemZLDCleanupPass(SystemZTargetMachine &TM);
+FunctionPass *createSystemZTDCPass();
} // end namespace llvm
#endif