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author | Pirama Arumuga Nainar <pirama@google.com> | 2015-05-06 11:46:36 -0700 |
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committer | Pirama Arumuga Nainar <pirama@google.com> | 2015-05-18 10:52:30 -0700 |
commit | 2c3e0051c31c3f5b2328b447eadf1cf9c4427442 (patch) | |
tree | c0104029af14e9f47c2ef58ca60e6137691f3c9b /lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.h | |
parent | e1bc145815f4334641be19f1c45ecf85d25b6e5a (diff) | |
download | external_llvm-2c3e0051c31c3f5b2328b447eadf1cf9c4427442.zip external_llvm-2c3e0051c31c3f5b2328b447eadf1cf9c4427442.tar.gz external_llvm-2c3e0051c31c3f5b2328b447eadf1cf9c4427442.tar.bz2 |
Update aosp/master LLVM for rebase to r235153
Change-Id: I9bf53792f9fc30570e81a8d80d296c681d005ea7
(cherry picked from commit 0c7f116bb6950ef819323d855415b2f2b0aad987)
Diffstat (limited to 'lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.h')
-rw-r--r-- | lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.h | 43 |
1 files changed, 36 insertions, 7 deletions
diff --git a/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.h b/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.h index 8b1e3b4..5f2117c 100644 --- a/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.h +++ b/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.h @@ -18,6 +18,7 @@ #undef PPC #include "llvm/Support/DataTypes.h" +#include "llvm/Support/MathExtras.h" namespace llvm { class MCAsmBackend; @@ -29,6 +30,7 @@ class MCRegisterInfo; class MCSubtargetInfo; class Target; class StringRef; +class raw_pwrite_stream; class raw_ostream; extern Target ThePPC32Target; @@ -42,15 +44,42 @@ MCCodeEmitter *createPPCMCCodeEmitter(const MCInstrInfo &MCII, MCAsmBackend *createPPCAsmBackend(const Target &T, const MCRegisterInfo &MRI, StringRef TT, StringRef CPU); -/// createPPCELFObjectWriter - Construct an PPC ELF object writer. -MCObjectWriter *createPPCELFObjectWriter(raw_ostream &OS, - bool Is64Bit, - bool IsLittleEndian, - uint8_t OSABI); -/// createPPCELFObjectWriter - Construct a PPC Mach-O object writer. -MCObjectWriter *createPPCMachObjectWriter(raw_ostream &OS, bool Is64Bit, +/// Construct an PPC ELF object writer. +MCObjectWriter *createPPCELFObjectWriter(raw_pwrite_stream &OS, bool Is64Bit, + bool IsLittleEndian, uint8_t OSABI); +/// Construct a PPC Mach-O object writer. +MCObjectWriter *createPPCMachObjectWriter(raw_pwrite_stream &OS, bool Is64Bit, uint32_t CPUType, uint32_t CPUSubtype); + +/// Returns true iff Val consists of one contiguous run of 1s with any number of +/// 0s on either side. The 1s are allowed to wrap from LSB to MSB, so +/// 0x000FFF0, 0x0000FFFF, and 0xFF0000FF are all runs. 0x0F0F0000 is not, +/// since all 1s are not contiguous. +static inline bool isRunOfOnes(unsigned Val, unsigned &MB, unsigned &ME) { + if (!Val) + return false; + + if (isShiftedMask_32(Val)) { + // look for the first non-zero bit + MB = countLeadingZeros(Val); + // look for the first zero bit after the run of ones + ME = countLeadingZeros((Val - 1) ^ Val); + return true; + } else { + Val = ~Val; // invert mask + if (isShiftedMask_32(Val)) { + // effectively look for the first zero bit + ME = countLeadingZeros(Val) - 1; + // effectively look for the first one bit after the run of zeros + MB = countLeadingZeros((Val - 1) ^ Val) + 1; + return true; + } + } + // no run present + return false; +} + } // End llvm namespace // Generated files will use "namespace PPC". To avoid symbol clash, |