diff options
author | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-07-02 14:56:45 +0000 |
---|---|---|
committer | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-07-02 14:56:45 +0000 |
commit | 9188443a2d35352c4e8a2cffd1b4d31d47843b26 (patch) | |
tree | 980fdaf6bdacd1e193a723d27be6d21a03eddc4e /lib/Target/SystemZ/MCTargetDesc/SystemZMCCodeEmitter.cpp | |
parent | 850ba41ed4252aae61e62140cdf0c61dbb444563 (diff) | |
download | external_llvm-9188443a2d35352c4e8a2cffd1b4d31d47843b26.zip external_llvm-9188443a2d35352c4e8a2cffd1b4d31d47843b26.tar.gz external_llvm-9188443a2d35352c4e8a2cffd1b4d31d47843b26.tar.bz2 |
[SystemZ] Add the MVC instruction
This is the first use of D(L,B) addressing, which required a fair bit
of surgery. For that reason, the patch just adds the instruction
definition and the associated assembler and disassembler support.
A later patch will actually make use of it for codegen.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185433 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/SystemZ/MCTargetDesc/SystemZMCCodeEmitter.cpp')
-rw-r--r-- | lib/Target/SystemZ/MCTargetDesc/SystemZMCCodeEmitter.cpp | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/lib/Target/SystemZ/MCTargetDesc/SystemZMCCodeEmitter.cpp b/lib/Target/SystemZ/MCTargetDesc/SystemZMCCodeEmitter.cpp index f8f8998..bda7714 100644 --- a/lib/Target/SystemZ/MCTargetDesc/SystemZMCCodeEmitter.cpp +++ b/lib/Target/SystemZ/MCTargetDesc/SystemZMCCodeEmitter.cpp @@ -49,7 +49,7 @@ private: SmallVectorImpl<MCFixup> &Fixups) const; // Called by the TableGen code to get the binary encoding of an address. - // The index, if any, is encoded first, followed by the base, + // The index or length, if any, is encoded first, followed by the base, // followed by the displacement. In a 20-bit displacement, // the low 12 bits are encoded before the high 8 bits. uint64_t getBDAddr12Encoding(const MCInst &MI, unsigned OpNum, @@ -60,6 +60,8 @@ private: SmallVectorImpl<MCFixup> &Fixups) const; uint64_t getBDXAddr20Encoding(const MCInst &MI, unsigned OpNum, SmallVectorImpl<MCFixup> &Fixups) const; + uint64_t getBDLAddr12Len8Encoding(const MCInst &MI, unsigned OpNum, + SmallVectorImpl<MCFixup> &Fixups) const; // Operand OpNum of MI needs a PC-relative fixup of kind Kind at // Offset bytes from the start of MI. Add the fixup to Fixups @@ -157,6 +159,16 @@ getBDXAddr20Encoding(const MCInst &MI, unsigned OpNum, | ((Disp & 0xff000) >> 12); } +uint64_t SystemZMCCodeEmitter:: +getBDLAddr12Len8Encoding(const MCInst &MI, unsigned OpNum, + SmallVectorImpl<MCFixup> &Fixups) const { + uint64_t Base = getMachineOpValue(MI, MI.getOperand(OpNum), Fixups); + uint64_t Disp = getMachineOpValue(MI, MI.getOperand(OpNum + 1), Fixups); + uint64_t Len = getMachineOpValue(MI, MI.getOperand(OpNum + 2), Fixups) - 1; + assert(isUInt<4>(Base) && isUInt<12>(Disp) && isUInt<8>(Len)); + return (Len << 16) | (Base << 12) | Disp; +} + uint64_t SystemZMCCodeEmitter::getPCRelEncoding(const MCInst &MI, unsigned OpNum, SmallVectorImpl<MCFixup> &Fixups, |