206 lines
9.1 KiB
TableGen
206 lines
9.1 KiB
TableGen
//===- PPCCallingConv.td - Calling Conventions for PowerPC -*- tablegen -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This describes the calling conventions for the PowerPC 32- and 64-bit
|
|
// architectures.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// CCIfSubtarget - Match if the current subtarget has a feature F.
|
|
class CCIfSubtarget<string F, CCAction A>
|
|
: CCIf<!strconcat("static_cast<const PPCSubtarget&>"
|
|
"(State.getMachineFunction().getSubtarget()).",
|
|
F),
|
|
A>;
|
|
class CCIfNotSubtarget<string F, CCAction A>
|
|
: CCIf<!strconcat("!static_cast<const PPCSubtarget&>"
|
|
"(State.getMachineFunction().getSubtarget()).",
|
|
F),
|
|
A>;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Return Value Calling Convention
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// Return-value convention for PowerPC
|
|
def RetCC_PPC : CallingConv<[
|
|
// On PPC64, integer return values are always promoted to i64
|
|
CCIfType<[i32, i1], CCIfSubtarget<"isPPC64()", CCPromoteToType<i64>>>,
|
|
CCIfType<[i1], CCIfNotSubtarget<"isPPC64()", CCPromoteToType<i32>>>,
|
|
|
|
CCIfType<[i32], CCAssignToReg<[R3, R4, R5, R6, R7, R8, R9, R10]>>,
|
|
CCIfType<[i64], CCAssignToReg<[X3, X4, X5, X6]>>,
|
|
CCIfType<[i128], CCAssignToReg<[X3, X4, X5, X6]>>,
|
|
|
|
// Floating point types returned as "direct" go into F1 .. F8; note that
|
|
// only the ELFv2 ABI fully utilizes all these registers.
|
|
CCIfType<[f32], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>,
|
|
CCIfType<[f64], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>,
|
|
|
|
// Vector types returned as "direct" go into V2 .. V9; note that only the
|
|
// ELFv2 ABI fully utilizes all these registers.
|
|
CCIfType<[v16i8, v8i16, v4i32, v4f32],
|
|
CCAssignToReg<[V2, V3, V4, V5, V6, V7, V8, V9]>>,
|
|
CCIfType<[v2f64, v2i64],
|
|
CCAssignToReg<[VSH2, VSH3, VSH4, VSH5, VSH6, VSH7, VSH8, VSH9]>>
|
|
]>;
|
|
|
|
|
|
// Note that we don't currently have calling conventions for 64-bit
|
|
// PowerPC, but handle all the complexities of the ABI in the lowering
|
|
// logic. FIXME: See if the logic can be simplified with use of CCs.
|
|
// This may require some extensions to current table generation.
|
|
|
|
// Simple calling convention for 64-bit ELF PowerPC fast isel.
|
|
// Only handle ints and floats. All ints are promoted to i64.
|
|
// Vector types and quadword ints are not handled.
|
|
def CC_PPC64_ELF_FIS : CallingConv<[
|
|
CCIfType<[i1], CCPromoteToType<i64>>,
|
|
CCIfType<[i8], CCPromoteToType<i64>>,
|
|
CCIfType<[i16], CCPromoteToType<i64>>,
|
|
CCIfType<[i32], CCPromoteToType<i64>>,
|
|
CCIfType<[i64], CCAssignToReg<[X3, X4, X5, X6, X7, X8, X9, X10]>>,
|
|
CCIfType<[f32, f64], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>
|
|
]>;
|
|
|
|
// Simple return-value convention for 64-bit ELF PowerPC fast isel.
|
|
// All small ints are promoted to i64. Vector types, quadword ints,
|
|
// and multiple register returns are "supported" to avoid compile
|
|
// errors, but none are handled by the fast selector.
|
|
def RetCC_PPC64_ELF_FIS : CallingConv<[
|
|
CCIfType<[i1], CCPromoteToType<i64>>,
|
|
CCIfType<[i8], CCPromoteToType<i64>>,
|
|
CCIfType<[i16], CCPromoteToType<i64>>,
|
|
CCIfType<[i32], CCPromoteToType<i64>>,
|
|
CCIfType<[i64], CCAssignToReg<[X3, X4]>>,
|
|
CCIfType<[i128], CCAssignToReg<[X3, X4, X5, X6]>>,
|
|
CCIfType<[f32], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>,
|
|
CCIfType<[f64], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>,
|
|
CCIfType<[v16i8, v8i16, v4i32, v4f32],
|
|
CCAssignToReg<[V2, V3, V4, V5, V6, V7, V8, V9]>>,
|
|
CCIfType<[v2f64, v2i64],
|
|
CCAssignToReg<[VSH2, VSH3, VSH4, VSH5, VSH6, VSH7, VSH8, VSH9]>>
|
|
]>;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// PowerPC System V Release 4 32-bit ABI
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
def CC_PPC32_SVR4_Common : CallingConv<[
|
|
CCIfType<[i1], CCPromoteToType<i32>>,
|
|
|
|
// The ABI requires i64 to be passed in two adjacent registers with the first
|
|
// register having an odd register number.
|
|
CCIfType<[i32], CCIfSplit<CCCustom<"CC_PPC32_SVR4_Custom_AlignArgRegs">>>,
|
|
|
|
// The first 8 integer arguments are passed in integer registers.
|
|
CCIfType<[i32], CCAssignToReg<[R3, R4, R5, R6, R7, R8, R9, R10]>>,
|
|
|
|
// Make sure the i64 words from a long double are either both passed in
|
|
// registers or both passed on the stack.
|
|
CCIfType<[f64], CCIfSplit<CCCustom<"CC_PPC32_SVR4_Custom_AlignFPArgRegs">>>,
|
|
|
|
// FP values are passed in F1 - F8.
|
|
CCIfType<[f32, f64], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>,
|
|
|
|
// Split arguments have an alignment of 8 bytes on the stack.
|
|
CCIfType<[i32], CCIfSplit<CCAssignToStack<4, 8>>>,
|
|
|
|
CCIfType<[i32], CCAssignToStack<4, 4>>,
|
|
|
|
// Floats are stored in double precision format, thus they have the same
|
|
// alignment and size as doubles.
|
|
CCIfType<[f32,f64], CCAssignToStack<8, 8>>,
|
|
|
|
// Vectors get 16-byte stack slots that are 16-byte aligned.
|
|
CCIfType<[v16i8, v8i16, v4i32, v4f32, v2f64, v2i64], CCAssignToStack<16, 16>>
|
|
]>;
|
|
|
|
// This calling convention puts vector arguments always on the stack. It is used
|
|
// to assign vector arguments which belong to the variable portion of the
|
|
// parameter list of a variable argument function.
|
|
def CC_PPC32_SVR4_VarArg : CallingConv<[
|
|
CCDelegateTo<CC_PPC32_SVR4_Common>
|
|
]>;
|
|
|
|
// In contrast to CC_PPC32_SVR4_VarArg, this calling convention first tries to
|
|
// put vector arguments in vector registers before putting them on the stack.
|
|
def CC_PPC32_SVR4 : CallingConv<[
|
|
// The first 12 Vector arguments are passed in AltiVec registers.
|
|
CCIfType<[v16i8, v8i16, v4i32, v4f32],
|
|
CCAssignToReg<[V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13]>>,
|
|
CCIfType<[v2f64, v2i64],
|
|
CCAssignToReg<[VSH2, VSH3, VSH4, VSH5, VSH6, VSH7, VSH8, VSH9,
|
|
VSH10, VSH11, VSH12, VSH13]>>,
|
|
|
|
CCDelegateTo<CC_PPC32_SVR4_Common>
|
|
]>;
|
|
|
|
// Helper "calling convention" to handle aggregate by value arguments.
|
|
// Aggregate by value arguments are always placed in the local variable space
|
|
// of the caller. This calling convention is only used to assign those stack
|
|
// offsets in the callers stack frame.
|
|
//
|
|
// Still, the address of the aggregate copy in the callers stack frame is passed
|
|
// in a GPR (or in the parameter list area if all GPRs are allocated) from the
|
|
// caller to the callee. The location for the address argument is assigned by
|
|
// the CC_PPC32_SVR4 calling convention.
|
|
//
|
|
// The only purpose of CC_PPC32_SVR4_Custom_Dummy is to skip arguments which are
|
|
// not passed by value.
|
|
|
|
def CC_PPC32_SVR4_ByVal : CallingConv<[
|
|
CCIfByVal<CCPassByVal<4, 4>>,
|
|
|
|
CCCustom<"CC_PPC32_SVR4_Custom_Dummy">
|
|
]>;
|
|
|
|
def CSR_Altivec : CalleeSavedRegs<(add V20, V21, V22, V23, V24, V25, V26, V27,
|
|
V28, V29, V30, V31)>;
|
|
|
|
def CSR_Darwin32 : CalleeSavedRegs<(add R13, R14, R15, R16, R17, R18, R19, R20,
|
|
R21, R22, R23, R24, R25, R26, R27, R28,
|
|
R29, R30, R31, F14, F15, F16, F17, F18,
|
|
F19, F20, F21, F22, F23, F24, F25, F26,
|
|
F27, F28, F29, F30, F31, CR2, CR3, CR4
|
|
)>;
|
|
|
|
def CSR_Darwin32_Altivec : CalleeSavedRegs<(add CSR_Darwin32, CSR_Altivec)>;
|
|
|
|
def CSR_SVR432 : CalleeSavedRegs<(add R14, R15, R16, R17, R18, R19, R20,
|
|
R21, R22, R23, R24, R25, R26, R27, R28,
|
|
R29, R30, R31, F14, F15, F16, F17, F18,
|
|
F19, F20, F21, F22, F23, F24, F25, F26,
|
|
F27, F28, F29, F30, F31, CR2, CR3, CR4
|
|
)>;
|
|
|
|
def CSR_SVR432_Altivec : CalleeSavedRegs<(add CSR_SVR432, CSR_Altivec)>;
|
|
|
|
def CSR_Darwin64 : CalleeSavedRegs<(add X13, X14, X15, X16, X17, X18, X19, X20,
|
|
X21, X22, X23, X24, X25, X26, X27, X28,
|
|
X29, X30, X31, F14, F15, F16, F17, F18,
|
|
F19, F20, F21, F22, F23, F24, F25, F26,
|
|
F27, F28, F29, F30, F31, CR2, CR3, CR4
|
|
)>;
|
|
|
|
def CSR_Darwin64_Altivec : CalleeSavedRegs<(add CSR_Darwin64, CSR_Altivec)>;
|
|
|
|
def CSR_SVR464 : CalleeSavedRegs<(add X14, X15, X16, X17, X18, X19, X20,
|
|
X21, X22, X23, X24, X25, X26, X27, X28,
|
|
X29, X30, X31, F14, F15, F16, F17, F18,
|
|
F19, F20, F21, F22, F23, F24, F25, F26,
|
|
F27, F28, F29, F30, F31, CR2, CR3, CR4
|
|
)>;
|
|
|
|
|
|
def CSR_SVR464_Altivec : CalleeSavedRegs<(add CSR_SVR464, CSR_Altivec)>;
|
|
|
|
def CSR_NoRegs : CalleeSavedRegs<(add)>;
|
|
|