-//===- MipsCallingConv.td - Calling Conventions for Mips --------*- C++ -*-===//
-//
+//===- MipsCallingConv.td - Calling Conventions for Mips ---*- tablegen -*-===//
+//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Bruno Cardoso Lopes and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
-//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
//===----------------------------------------------------------------------===//
// This describes the calling conventions for Mips architecture.
//===----------------------------------------------------------------------===//
/// CCIfSubtarget - Match if the current subtarget has a feature F.
-class CCIfSubtarget<string F, CCAction A>:
+class CCIfSubtarget<string F, CCAction A>:
CCIf<!strconcat("State.getTarget().getSubtarget<MipsSubtarget>().", F), A>;
//===----------------------------------------------------------------------===//
-// Mips Return Value Calling Convention
+// Mips O32 Calling Convention
//===----------------------------------------------------------------------===//
-def RetCC_Mips : CallingConv<[
+
+// Only the return rules are defined here for O32. The rules for argument
+// passing are defined in MipsISelLowering.cpp.
+def RetCC_MipsO32 : CallingConv<[
// i32 are returned in registers V0, V1
- CCIfType<[i32], CCAssignToReg<[V0, V1]>>
-]>;
+ CCIfType<[i32], CCAssignToReg<[V0, V1]>>,
+
+ // f32 are returned in registers F0, F2
+ CCIfType<[f32], CCAssignToReg<[F0, F2]>>,
+ // f64 are returned in register D0, D1
+ CCIfType<[f64], CCIfSubtarget<"isNotSingleFloat()", CCAssignToReg<[D0, D1]>>>
+]>;
//===----------------------------------------------------------------------===//
-// Mips Argument Calling Conventions
+// Mips EABI Calling Convention
//===----------------------------------------------------------------------===//
-def CC_Mips : CallingConv<[
+
+def CC_MipsEABI : CallingConv<[
// Promote i8/i16 arguments to i32.
CCIfType<[i8, i16], CCPromoteToType<i32>>,
- // The first 4 integer arguments are passed in integer registers.
- CCIfType<[i32], CCAssignToReg<[A0, A1, A2, A3]>>,
+ // Integer arguments are passed in integer registers.
+ CCIfType<[i32], CCAssignToReg<[A0, A1, A2, A3, T0, T1, T2, T3]>>,
+
+ // Single fp arguments are passed in pairs within 32-bit mode
+ CCIfType<[f32], CCIfSubtarget<"isSingleFloat()",
+ CCAssignToReg<[F12, F13, F14, F15, F16, F17, F18, F19]>>>,
+
+ CCIfType<[f32], CCIfSubtarget<"isNotSingleFloat()",
+ CCAssignToReg<[F12, F14, F16, F18]>>>,
+
+ // The first 4 double fp arguments are passed in single fp registers.
+ CCIfType<[f64], CCIfSubtarget<"isNotSingleFloat()",
+ CCAssignToReg<[D6, D7, D8, D9]>>>,
// Integer values get stored in stack slots that are 4 bytes in
// size and 4-byte aligned.
- CCIfType<[i32], CCAssignToStack<4, 4>>
+ CCIfType<[i32, f32], CCAssignToStack<4, 4>>,
+
+ // Integer values get stored in stack slots that are 8 bytes in
+ // size and 8-byte aligned.
+ CCIfType<[f64], CCIfSubtarget<"isNotSingleFloat()", CCAssignToStack<8, 8>>>
]>;
+def RetCC_MipsEABI : CallingConv<[
+ // i32 are returned in registers V0, V1
+ CCIfType<[i32], CCAssignToReg<[V0, V1]>>,
+
+ // f32 are returned in registers F0, F1
+ CCIfType<[f32], CCAssignToReg<[F0, F1]>>,
+
+ // f64 are returned in register D0
+ CCIfType<[f64], CCIfSubtarget<"isNotSingleFloat()", CCAssignToReg<[D0]>>>
+]>;
+
+//===----------------------------------------------------------------------===//
+// Mips Calling Convention Dispatch
+//===----------------------------------------------------------------------===//
+
+def CC_Mips : CallingConv<[
+ CCIfSubtarget<"isABI_EABI()", CCDelegateTo<CC_MipsEABI>>
+]>;
+
+def RetCC_Mips : CallingConv<[
+ CCIfSubtarget<"isABI_EABI()", CCDelegateTo<RetCC_MipsEABI>>,
+ CCDelegateTo<RetCC_MipsO32>
+]>;