diff options
| -rw-r--r-- | utils/TableGen/RegisterInfoEmitter.cpp | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/utils/TableGen/RegisterInfoEmitter.cpp b/utils/TableGen/RegisterInfoEmitter.cpp index b784e738e0..c00c7aa62d 100644 --- a/utils/TableGen/RegisterInfoEmitter.cpp +++ b/utils/TableGen/RegisterInfoEmitter.cpp @@ -205,6 +205,21 @@ RegisterInfoEmitter::EmitRegMapping(raw_ostream &OS, } } +// Print a BitVector as a sequence of hex numbers using a little-endian mapping. +// Width is the number of bits per hex number. +static void printBitVectorAsHex(raw_ostream &OS, + const BitVector &Bits, + unsigned Width) { + assert(Width <= 32 && "Width too large"); + unsigned Digits = (Width + 3) / 4; + for (unsigned i = 0, e = Bits.size(); i < e; i += Width) { + unsigned Value = 0; + for (unsigned j = 0; j != Width && i + j != e; ++j) + Value |= Bits.test(i + j) << j; + OS << format("0x%0*x, ", Digits, Value); + } +} + // Helper to emit a set of bits into a constant byte array. class BitVectorEmitter { BitVector Values; @@ -216,13 +231,7 @@ public: } void print(raw_ostream &OS) { - for (unsigned i = 0, e = Values.size() / 8; i != e; ++i) { - unsigned char out = 0; - for (unsigned j = 0; j != 8; ++j) - if (Values[i * 8 + j]) - out |= 1 << j; - OS << format("0x%02x, ", out); - } + printBitVectorAsHex(OS, Values, 8); } }; |