| Anton Korobeynikov | 9c19da0 | 2009-05-03 12:59:33 +0000 | [diff] [blame] | 1 | //==- MSP430CallingConv.td - Calling Conventions for MSP430 -*- tablegen -*-==// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // This describes the calling conventions for MSP430 architecture. |
| 10 | //===----------------------------------------------------------------------===// |
| 11 | |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | // MSP430 Return Value Calling Convention |
| 14 | //===----------------------------------------------------------------------===// |
| 15 | def RetCC_MSP430 : CallingConv<[ |
| 16 | // i16 are returned in registers R15, R14, R13, R12 |
| 17 | CCIfType<[i16], CCAssignToReg<[R15, R14, R13, R12]>> |
| 18 | ]>; |
| 19 | |
| 20 | //===----------------------------------------------------------------------===// |
| 21 | // MSP430 Argument Calling Conventions |
| 22 | //===----------------------------------------------------------------------===// |
| 23 | def CC_MSP430 : CallingConv<[ |
| 24 | // Promote i8 arguments to i16. |
| 25 | CCIfType<[i8], CCPromoteToType<i16>>, |
| 26 | |
| 27 | // The first 4 integer arguments of non-varargs functions are passed in |
| 28 | // integer registers. |
| 29 | CCIfNotVarArg<CCIfType<[i16], CCAssignToReg<[R15, R14, R13, R12]>>>, |
| 30 | |
| 31 | // Integer values get stored in stack slots that are 2 bytes in |
| 32 | // size and 2-byte aligned. |
| 33 | CCIfType<[i16], CCAssignToStack<2, 2>> |
| 34 | ]>; |