diff options
Diffstat (limited to 'src/ortho/mcode/ortho_code-x86-abi.adb')
| -rw-r--r-- | src/ortho/mcode/ortho_code-x86-abi.adb | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/src/ortho/mcode/ortho_code-x86-abi.adb b/src/ortho/mcode/ortho_code-x86-abi.adb index 69eb8d26e..fa5193982 100644 --- a/src/ortho/mcode/ortho_code-x86-abi.adb +++ b/src/ortho/mcode/ortho_code-x86-abi.adb @@ -40,6 +40,10 @@ package body Ortho_Code.X86.Abi is pragma Unreferenced (Subprg); begin Abi := (Offset => Subprg_Stack_Init, Inum => 0, Fnum => 0); + if Flags.Win64 then + -- On Win64, 32B are always reserved for home registers. + Abi.Offset := Abi.Offset + 32; + end if; end Start_Subprogram; type Regs_List is array (Boolean range <>, Natural range <>) of O_Reg; @@ -90,8 +94,13 @@ package body Ortho_Code.X86.Abi is Size := (Size + 3) and not 3; end if; Set_Decl_Reg (Inter, Reg); - Set_Local_Offset (Inter, Abi.Offset); - Abi.Offset := Abi.Offset + Int32 (Size); + if Flags.Win64 and Reg in Regs_R64 then + -- Use the normal home location (first reg at offset 8). + Set_Local_Offset (Inter, Int32 (8 * Abi.Inum)); + else + Set_Local_Offset (Inter, Abi.Offset); + Abi.Offset := Abi.Offset + Int32 (Size); + end if; end New_Interface; procedure Finish_Subprogram (Subprg : O_Dnode; Abi : in out O_Abi_Subprg) |