12cab237bSDimitry Andric//===-- RISCVCallingConv.td - Calling Conventions RISCV ----*- tablegen -*-===//
22cab237bSDimitry Andric//
32cab237bSDimitry Andric//                     The LLVM Compiler Infrastructure
42cab237bSDimitry Andric//
52cab237bSDimitry Andric// This file is distributed under the University of Illinois Open Source
62cab237bSDimitry Andric// License. See LICENSE.TXT for details.
72cab237bSDimitry Andric//
82cab237bSDimitry Andric//===----------------------------------------------------------------------===//
92cab237bSDimitry Andric//
102cab237bSDimitry Andric// This describes the calling conventions for the RISCV architecture.
112cab237bSDimitry Andric//
122cab237bSDimitry Andric//===----------------------------------------------------------------------===//
132cab237bSDimitry Andric
142cab237bSDimitry Andric// The RISC-V calling convention is handled with custom code in
152cab237bSDimitry Andric// RISCVISelLowering.cpp (CC_RISCV).
162cab237bSDimitry Andric
172cab237bSDimitry Andricdef CSR : CalleeSavedRegs<(add X1, X3, X4, X8, X9, (sequence "X%u", 18, 27))>;
182cab237bSDimitry Andric
192cab237bSDimitry Andric// Needed for implementation of RISCVRegisterInfo::getNoPreservedMask()
202cab237bSDimitry Andricdef CSR_NoRegs : CalleeSavedRegs<(add)>;
21*4ba319b5SDimitry Andric
22*4ba319b5SDimitry Andric// Interrupt handler needs to save/restore all registers that are used,
23*4ba319b5SDimitry Andric// both Caller and Callee saved registers.
24*4ba319b5SDimitry Andricdef CSR_Interrupt : CalleeSavedRegs<(add X1,
25*4ba319b5SDimitry Andric    (sequence "X%u", 3, 9),
26*4ba319b5SDimitry Andric    (sequence "X%u", 10, 11),
27*4ba319b5SDimitry Andric    (sequence "X%u", 12, 17),
28*4ba319b5SDimitry Andric    (sequence "X%u", 18, 27),
29*4ba319b5SDimitry Andric    (sequence "X%u", 28, 31))>;
30*4ba319b5SDimitry Andric
31*4ba319b5SDimitry Andric// Same as CSR_Interrupt, but including all 32-bit FP registers.
32*4ba319b5SDimitry Andricdef CSR_XLEN_F32_Interrupt: CalleeSavedRegs<(add X1,
33*4ba319b5SDimitry Andric    (sequence "X%u", 3, 9),
34*4ba319b5SDimitry Andric    (sequence "X%u", 10, 11),
35*4ba319b5SDimitry Andric    (sequence "X%u", 12, 17),
36*4ba319b5SDimitry Andric    (sequence "X%u", 18, 27),
37*4ba319b5SDimitry Andric    (sequence "X%u", 28, 31),
38*4ba319b5SDimitry Andric    (sequence "F%u_32", 0, 7),
39*4ba319b5SDimitry Andric    (sequence "F%u_32", 10, 11),
40*4ba319b5SDimitry Andric    (sequence "F%u_32", 12, 17),
41*4ba319b5SDimitry Andric    (sequence "F%u_32", 28, 31),
42*4ba319b5SDimitry Andric    (sequence "F%u_32", 8, 9),
43*4ba319b5SDimitry Andric    (sequence "F%u_32", 18, 27))>;
44*4ba319b5SDimitry Andric
45*4ba319b5SDimitry Andric// Same as CSR_Interrupt, but including all 64-bit FP registers.
46*4ba319b5SDimitry Andricdef CSR_XLEN_F64_Interrupt: CalleeSavedRegs<(add X1,
47*4ba319b5SDimitry Andric    (sequence "X%u", 3, 9),
48*4ba319b5SDimitry Andric    (sequence "X%u", 10, 11),
49*4ba319b5SDimitry Andric    (sequence "X%u", 12, 17),
50*4ba319b5SDimitry Andric    (sequence "X%u", 18, 27),
51*4ba319b5SDimitry Andric    (sequence "X%u", 28, 31),
52*4ba319b5SDimitry Andric    (sequence "F%u_64", 0, 7),
53*4ba319b5SDimitry Andric    (sequence "F%u_64", 10, 11),
54*4ba319b5SDimitry Andric    (sequence "F%u_64", 12, 17),
55*4ba319b5SDimitry Andric    (sequence "F%u_64", 28, 31),
56*4ba319b5SDimitry Andric    (sequence "F%u_64", 8, 9),
57*4ba319b5SDimitry Andric    (sequence "F%u_64", 18, 27))>;
58