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author | Jim Grosbach <grosbach@apple.com> | 2011-12-19 23:51:07 +0000 |
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committer | Jim Grosbach <grosbach@apple.com> | 2011-12-19 23:51:07 +0000 |
commit | 9b0878512fb57ee4b0bc483509e4d9f4f0b9e426 (patch) | |
tree | a612ce11b7654b6c605e708689c8acddcebed15b /lib/Target/ARM/AsmParser | |
parent | 26118cfaa03619ff12bdc5c9f848afa3d3289f9e (diff) | |
download | external_llvm-9b0878512fb57ee4b0bc483509e4d9f4f0b9e426.zip external_llvm-9b0878512fb57ee4b0bc483509e4d9f4f0b9e426.tar.gz external_llvm-9b0878512fb57ee4b0bc483509e4d9f4f0b9e426.tar.bz2 |
ARM NEON assembly aliases for VMOV<-->VMVN for i32 immediates.
e.g., "vmov.i32 d4, #-118" can be assembled as "vmvn.i32 d4, #117"
rdar://10603913
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146925 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/ARM/AsmParser')
-rw-r--r-- | lib/Target/ARM/AsmParser/ARMAsmParser.cpp | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp index 1c109f0..9852cc8 100644 --- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp +++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp @@ -1222,6 +1222,22 @@ public: (Value >= 0x01ff && Value <= 0xffff && (Value & 0xff) == 0xff) || (Value >= 0x01ffff && Value <= 0xffffff && (Value & 0xffff) == 0xffff); } + bool isNEONi32vmovNeg() const { + if (Kind != k_Immediate) + return false; + const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm()); + // Must be a constant. + if (!CE) return false; + int64_t Value = ~CE->getValue(); + // i32 value with set bits only in one byte X000, 0X00, 00X0, or 000X, + // for VMOV/VMVN only, 00Xf or 0Xff are also accepted. + return (Value >= 0 && Value < 256) || + (Value >= 0x0100 && Value <= 0xff00) || + (Value >= 0x010000 && Value <= 0xff0000) || + (Value >= 0x01000000 && Value <= 0xff000000) || + (Value >= 0x01ff && Value <= 0xffff && (Value & 0xff) == 0xff) || + (Value >= 0x01ffff && Value <= 0xffffff && (Value & 0xffff) == 0xffff); + } bool isNEONi64splat() const { if (Kind != k_Immediate) @@ -1825,6 +1841,20 @@ public: Inst.addOperand(MCOperand::CreateImm(Value)); } + void addNEONi32vmovNegOperands(MCInst &Inst, unsigned N) const { + assert(N == 1 && "Invalid number of operands!"); + // The immediate encodes the type of constant as well as the value. + const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm()); + unsigned Value = ~CE->getValue(); + if (Value >= 256 && Value <= 0xffff) + Value = (Value >> 8) | ((Value & 0xff) ? 0xc00 : 0x200); + else if (Value > 0xffff && Value <= 0xffffff) + Value = (Value >> 16) | ((Value & 0xff) ? 0xd00 : 0x400); + else if (Value > 0xffffff) + Value = (Value >> 24) | 0x600; + Inst.addOperand(MCOperand::CreateImm(Value)); + } + void addNEONi64splatOperands(MCInst &Inst, unsigned N) const { assert(N == 1 && "Invalid number of operands!"); // The immediate encodes the type of constant as well as the value. |