diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/README.txt | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/llvm/lib/Target/X86/README.txt b/llvm/lib/Target/X86/README.txt index 643559ad430..46849af2efd 100644 --- a/llvm/lib/Target/X86/README.txt +++ b/llvm/lib/Target/X86/README.txt @@ -66,7 +66,7 @@ and the third is the second source register (#1025). Never forget the destination register will show up in the MachineInstr operands vector. The code to generate this instruction looks like this: - BuildMI(BB, X86::ADDrr32, 2, 1027).addReg(1026).addReg(1025); + BuildMI(BB, X86::ADD32rr, 2, 1027).addReg(1026).addReg(1025); The first argument to BuildMI is the basic block to append the machine instruction to, the second is the opcode, the third is the number of operands, @@ -149,8 +149,25 @@ Stores and all other instructions treat the four memory operands in the same way, in the same order. +====================== +VI. Instruction naming +====================== + +An instruction name consists of the base name, a default operand size +followed by a character per operand with an optional special size. For +example: + +ADD8rr -> add, 8-bit register, 8-bit register + +IMUL16rmi -> imul, 16-bit register, 16-bit memory, 16-bit immediate + +IMUL16rmi8 -> imul, 16-bit register, 16-bit memory, 8-bit immediate + +MOVSX32rm16 -> movsx, 32-bit register, 16-bit memory + + ========================== -VI. TODO / Future Projects +VII. TODO / Future Projects ========================== Ideas for Improvements: |
