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|
-- | A description of the platform we're compiling for.
--
module Platform (
Platform(..),
Arch(..),
OS(..),
ArmISA(..),
ArmISAExt(..),
target32Bit,
osElfTarget
)
where
import Panic
-- | Contains enough information for the native code generator to emit
-- code for this platform.
data Platform
= Platform {
platformArch :: Arch,
platformOS :: OS,
platformHasGnuNonexecStack :: Bool,
platformHasSubsectionsViaSymbols :: Bool
}
deriving (Read, Show, Eq)
-- | Architectures that the native code generator knows about.
-- TODO: It might be nice to extend these constructors with information
-- about what instruction set extensions an architecture might support.
--
data Arch
= ArchUnknown
| ArchX86
| ArchX86_64
| ArchPPC
| ArchPPC_64
| ArchSPARC
| ArchARM
{ armISA :: ArmISA
, armISAExt :: [ArmISAExt] }
| ArchAlpha
| ArchMipseb
| ArchMipsel
deriving (Read, Show, Eq)
-- | Operating systems that the native code generator knows about.
-- Having OSUnknown should produce a sensible default, but no promises.
data OS
= OSUnknown
| OSLinux
| OSDarwin
| OSSolaris2
| OSMinGW32
| OSFreeBSD
| OSOpenBSD
deriving (Read, Show, Eq)
-- | ARM Instruction Set Architecture and Extensions
--
data ArmISA
= ARMv5
| ARMv6
| ARMv7
deriving (Read, Show, Eq)
data ArmISAExt
= VFPv2
| VFPv3
| VFPv3D16
| NEON
| IWMMX2
deriving (Read, Show, Eq)
target32Bit :: Platform -> Bool
target32Bit p = case platformArch p of
ArchUnknown -> panic "Don't know if ArchUnknown is 32bit"
ArchX86 -> True
ArchX86_64 -> False
ArchPPC -> True
ArchPPC_64 -> False
ArchSPARC -> True
ArchARM _ _ -> True
ArchMipseb -> True
ArchMipsel -> True
ArchAlpha -> False
-- | This predicates tells us whether the OS supports ELF-like shared libraries.
osElfTarget :: OS -> Bool
osElfTarget OSLinux = True
osElfTarget OSFreeBSD = True
osElfTarget OSOpenBSD = True
osElfTarget OSSolaris2 = True
osElfTarget OSDarwin = False
osElfTarget OSMinGW32 = False
osElfTarget OSUnknown = panic "Don't know if OSUnknown is elf"
|
