| Eli Friedman | 796492d | 2009-07-19 01:11:32 +0000 | [diff] [blame^] | 1 | //===- AlphaCallingConv.td - Calling Conventions for Alpha -*- 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 Alpha architecture. |
| 10 | //===----------------------------------------------------------------------===// |
| 11 | |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | // Alpha Return Value Calling Convention |
| 14 | //===----------------------------------------------------------------------===// |
| 15 | def RetCC_Alpha : CallingConv<[ |
| 16 | // i64 is returned in register R0 |
| 17 | CCIfType<[i64], CCAssignToReg<[R0]>>, |
| 18 | |
| 19 | // f32 / f64 are returned in F0/F1 |
| 20 | CCIfType<[f32, f64], CCAssignToReg<[F0, F1]>> |
| 21 | ]>; |
| 22 | |
| 23 | //===----------------------------------------------------------------------===// |
| 24 | // Alpha Argument Calling Conventions |
| 25 | //===----------------------------------------------------------------------===// |
| 26 | def CC_Alpha : CallingConv<[ |
| 27 | // The first 6 arguments are passed in registers, whether integer or |
| 28 | // floating-point |
| 29 | CCIfType<[i64], CCAssignToRegWithShadow<[R16, R17, R18, R19, R20, R21], |
| 30 | [F16, F17, F18, F19, F20, F21]>>, |
| 31 | |
| 32 | CCIfType<[f32, f64], CCAssignToRegWithShadow<[F16, F17, F18, F19, F20, F21], |
| 33 | [R16, R17, R18, R19, R20, R21]>>, |
| 34 | |
| 35 | // Stack slots are 8 bytes in size and 8-byte aligned. |
| 36 | CCIfType<[i64, f32, f64], CCAssignToStack<8, 8>> |
| 37 | ]>; |