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| author | Alkis Evlogimenos <alkis@evlogimenos.com> | 2004-02-29 18:44:03 +0000 |
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| committer | Alkis Evlogimenos <alkis@evlogimenos.com> | 2004-02-29 18:44:03 +0000 |
| commit | 96c9b8b49691c715ccc848ea3ef941f6e9b7e8f2 (patch) | |
| tree | c9400954c97d4d27c245b1551b9fdf2b17daf6d8 | |
| parent | 7f6124cfc29e1559759e51737535b2fe6257a788 (diff) | |
| download | external_llvm-96c9b8b49691c715ccc848ea3ef941f6e9b7e8f2.zip external_llvm-96c9b8b49691c715ccc848ea3ef941f6e9b7e8f2.tar.gz external_llvm-96c9b8b49691c715ccc848ea3ef941f6e9b7e8f2.tar.bz2 | |
Add instruction name description.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11998 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/X86/README.txt | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt index 643559a..46849af 100644 --- a/lib/Target/X86/README.txt +++ b/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: |