[PATCH] D114356: [Support] Add isShiftedUIntN to MathExtras.h
Craig Blackmore via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Nov 22 03:54:28 PST 2021
craigblackmore created this revision.
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This is a non-templated version of isShiftedUInt which takes N and S as arguments.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D114356
Files:
llvm/include/llvm/Support/MathExtras.h
Index: llvm/include/llvm/Support/MathExtras.h
===================================================================
--- llvm/include/llvm/Support/MathExtras.h
+++ llvm/include/llvm/Support/MathExtras.h
@@ -461,6 +461,12 @@
return N >= 64 || (minIntN(N) <= x && x <= maxIntN(N));
}
+/// Checks if an unsigned integer is an N bit number shifted left by S. Dynamic
+/// version of isShiftedUInt.
+inline bool isShiftedUIntN(unsigned N, unsigned S, uint64_t x) {
+ return isUIntN(N + S, x) && (x % (UINT64_C(1) << S) == 0);
+}
+
/// Return true if the argument is a non-empty sequence of ones starting at the
/// least significant bit with the remainder zero (32 bit version).
/// Ex. isMask_32(0x0000FFFFU) == true.
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