X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FPowerPC%2FPPCCallingConv.td;h=155fba22d9d7b85d5199e2fd5227ddbb32b37200;hb=f27805b5c5a2c58aeea5dc9d305d6dba61b9f2aa;hp=0991d8397c78ba35216e298f94f72f36c2383c48;hpb=161e897b0fb35d156b2fe720fadabd975b0d6723;p=oota-llvm.git

diff --git a/lib/Target/PowerPC/PPCCallingConv.td b/lib/Target/PowerPC/PPCCallingConv.td
index 0991d8397c7..155fba22d9d 100644
--- a/lib/Target/PowerPC/PPCCallingConv.td
+++ b/lib/Target/PowerPC/PPCCallingConv.td
@@ -2,8 +2,8 @@
 // 
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Chris Lattner 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.
 // 
 //===----------------------------------------------------------------------===//
 //
@@ -22,8 +22,8 @@ class CCIfSubtarget<string F, CCAction A>
 
 // Return-value convention for PowerPC
 def RetCC_PPC : CallingConv<[
-  CCIfType<[i32], CCAssignToReg<[R3, R4]>>,
-  CCIfType<[i64], CCAssignToReg<[X3, X4]>>,
+  CCIfType<[i32], CCAssignToReg<[R3, R4, R5, R6, R7, R8, R9, R10]>>,
+  CCIfType<[i64], CCAssignToReg<[X3, X4, X5, X6]>>,
   
   CCIfType<[f32], CCAssignToReg<[F1]>>,
   CCIfType<[f64], CCAssignToReg<[F1, F2]>>,
@@ -43,10 +43,8 @@ def CC_PPC : CallingConv<[
   CCIfType<[i64], CCAssignToReg<[X3, X4, X5, X6, X7, X8, X9, X10]>>,
   
   // Common sub-targets passes FP values in F1 - F13
-  CCIfType<[f32, f64], CCIfSubtarget<"isMachoABI()",
-           CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8,F9,F10,F11,F12,F13]>>>,
-  // ELF32 sub-target pass FP values in F1 - F8.
-  CCIfType<[f32, f64], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>,
+  CCIfType<[f32, f64], 
+           CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8,F9,F10,F11,F12,F13]>>,
            
   // The first 12 Vector arguments are passed in altivec registers.
   CCIfType<[v16i8, v8i16, v4i32, v4f32],
@@ -64,3 +62,71 @@ def CC_PPC : CallingConv<[
 
 */
 
+//===----------------------------------------------------------------------===//
+// PowerPC System V Release 4 ABI
+//===----------------------------------------------------------------------===//
+
+def CC_PPC_SVR4_Common : CallingConv<[
+  // 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_PPC_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_PPC_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], 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_PPC_SVR4_VarArg : CallingConv<[
+  CCDelegateTo<CC_PPC_SVR4_Common>
+]>;
+
+// In contrast to CC_PPC_SVR4_VarArg, this calling convention first tries to put
+// vector arguments in vector registers before putting them on the stack.
+def CC_PPC_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]>>,
+           
+  CCDelegateTo<CC_PPC_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_PPC_SVR4 calling convention.
+//
+// The only purpose of CC_PPC_SVR4_Custom_Dummy is to skip arguments which are
+// not passed by value.
+ 
+def CC_PPC_SVR4_ByVal : CallingConv<[
+  CCIfByVal<CCPassByVal<4, 4>>,
+  
+  CCCustom<"CC_PPC_SVR4_Custom_Dummy">
+]>;
+