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39 lines
1.7 KiB
TableGen
39 lines
1.7 KiB
TableGen
//===- AlphaCallingConv.td - Calling Conventions for Alpha -*- tablegen -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// This describes the calling conventions for Alpha architecture.
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// Alpha Return Value Calling Convention
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//===----------------------------------------------------------------------===//
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def RetCC_Alpha : CallingConv<[
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// i64 is returned in register R0
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// R1 is an llvm extension, I don't know what gcc does
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CCIfType<[i64], CCAssignToReg<[R0,R1]>>,
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// f32 / f64 are returned in F0/F1
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CCIfType<[f32, f64], CCAssignToReg<[F0, F1]>>
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]>;
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//===----------------------------------------------------------------------===//
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// Alpha Argument Calling Conventions
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//===----------------------------------------------------------------------===//
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def CC_Alpha : CallingConv<[
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// The first 6 arguments are passed in registers, whether integer or
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// floating-point
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CCIfType<[i64], CCAssignToRegWithShadow<[R16, R17, R18, R19, R20, R21],
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[F16, F17, F18, F19, F20, F21]>>,
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CCIfType<[f32, f64], CCAssignToRegWithShadow<[F16, F17, F18, F19, F20, F21],
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[R16, R17, R18, R19, R20, R21]>>,
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// Stack slots are 8 bytes in size and 8-byte aligned.
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CCIfType<[i64, f32, f64], CCAssignToStack<8, 8>>
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]>;
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