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module CmmMachOp
( MachOp(..)
, pprMachOp, isCommutableMachOp, isAssociativeMachOp
, isComparisonMachOp, machOpResultType
, machOpArgReps, maybeInvertComparison
-- MachOp builders
, mo_wordAdd, mo_wordSub, mo_wordEq, mo_wordNe,mo_wordMul, mo_wordSQuot
, mo_wordSRem, mo_wordSNeg, mo_wordUQuot, mo_wordURem
, mo_wordSGe, mo_wordSLe, mo_wordSGt, mo_wordSLt, mo_wordUGe
, mo_wordULe, mo_wordUGt, mo_wordULt
, mo_wordAnd, mo_wordOr, mo_wordXor, mo_wordNot, mo_wordShl, mo_wordSShr, mo_wordUShr
, mo_u_8To32, mo_s_8To32, mo_u_16To32, mo_s_16To32
, mo_u_8ToWord, mo_s_8ToWord, mo_u_16ToWord, mo_s_16ToWord, mo_u_32ToWord, mo_s_32ToWord
, mo_32To8, mo_32To16, mo_WordTo8, mo_WordTo16, mo_WordTo32
-- CallishMachOp
, CallishMachOp(..)
, pprCallishMachOp
)
where
#include "HsVersions.h"
import CmmType
import Outputable
-----------------------------------------------------------------------------
-- MachOp
-----------------------------------------------------------------------------
{- |
Machine-level primops; ones which we can reasonably delegate to the
native code generators to handle.
Most operations are parameterised by the 'Width' that they operate on.
Some operations have separate signed and unsigned versions, and float
and integer versions.
-}
data MachOp
-- Integer operations (insensitive to signed/unsigned)
= MO_Add Width
| MO_Sub Width
| MO_Eq Width
| MO_Ne Width
| MO_Mul Width -- low word of multiply
-- Signed multiply/divide
| MO_S_MulMayOflo Width -- nonzero if signed multiply overflows
| MO_S_Quot Width -- signed / (same semantics as IntQuotOp)
| MO_S_Rem Width -- signed % (same semantics as IntRemOp)
| MO_S_Neg Width -- unary -
-- Unsigned multiply/divide
| MO_U_MulMayOflo Width -- nonzero if unsigned multiply overflows
| MO_U_Quot Width -- unsigned / (same semantics as WordQuotOp)
| MO_U_Rem Width -- unsigned % (same semantics as WordRemOp)
-- Signed comparisons
| MO_S_Ge Width
| MO_S_Le Width
| MO_S_Gt Width
| MO_S_Lt Width
-- Unsigned comparisons
| MO_U_Ge Width
| MO_U_Le Width
| MO_U_Gt Width
| MO_U_Lt Width
-- Floating point arithmetic
| MO_F_Add Width
| MO_F_Sub Width
| MO_F_Neg Width -- unary -
| MO_F_Mul Width
| MO_F_Quot Width
-- Floating point comparison
| MO_F_Eq Width
| MO_F_Ne Width
| MO_F_Ge Width
| MO_F_Le Width
| MO_F_Gt Width
| MO_F_Lt Width
-- Bitwise operations. Not all of these may be supported
-- at all sizes, and only integral Widths are valid.
| MO_And Width
| MO_Or Width
| MO_Xor Width
| MO_Not Width
| MO_Shl Width
| MO_U_Shr Width -- unsigned shift right
| MO_S_Shr Width -- signed shift right
-- Conversions. Some of these will be NOPs.
-- Floating-point conversions use the signed variant.
| MO_SF_Conv Width Width -- Signed int -> Float
| MO_FS_Conv Width Width -- Float -> Signed int
| MO_SS_Conv Width Width -- Signed int -> Signed int
| MO_UU_Conv Width Width -- unsigned int -> unsigned int
| MO_FF_Conv Width Width -- Float -> Float
deriving (Eq, Show)
pprMachOp :: MachOp -> SDoc
pprMachOp mo = text (show mo)
-- -----------------------------------------------------------------------------
-- Some common MachReps
-- A 'wordRep' is a machine word on the target architecture
-- Specifically, it is the size of an Int#, Word#, Addr#
-- and the unit of allocation on the stack and the heap
-- Any pointer is also guaranteed to be a wordRep.
mo_wordAdd, mo_wordSub, mo_wordEq, mo_wordNe,mo_wordMul, mo_wordSQuot
, mo_wordSRem, mo_wordSNeg, mo_wordUQuot, mo_wordURem
, mo_wordSGe, mo_wordSLe, mo_wordSGt, mo_wordSLt, mo_wordUGe
, mo_wordULe, mo_wordUGt, mo_wordULt
, mo_wordAnd, mo_wordOr, mo_wordXor, mo_wordNot, mo_wordShl, mo_wordSShr, mo_wordUShr
, mo_u_8To32, mo_s_8To32, mo_u_16To32, mo_s_16To32
, mo_u_8ToWord, mo_s_8ToWord, mo_u_16ToWord, mo_s_16ToWord, mo_u_32ToWord, mo_s_32ToWord
, mo_32To8, mo_32To16, mo_WordTo8, mo_WordTo16, mo_WordTo32
:: MachOp
mo_wordAdd = MO_Add wordWidth
mo_wordSub = MO_Sub wordWidth
mo_wordEq = MO_Eq wordWidth
mo_wordNe = MO_Ne wordWidth
mo_wordMul = MO_Mul wordWidth
mo_wordSQuot = MO_S_Quot wordWidth
mo_wordSRem = MO_S_Rem wordWidth
mo_wordSNeg = MO_S_Neg wordWidth
mo_wordUQuot = MO_U_Quot wordWidth
mo_wordURem = MO_U_Rem wordWidth
mo_wordSGe = MO_S_Ge wordWidth
mo_wordSLe = MO_S_Le wordWidth
mo_wordSGt = MO_S_Gt wordWidth
mo_wordSLt = MO_S_Lt wordWidth
mo_wordUGe = MO_U_Ge wordWidth
mo_wordULe = MO_U_Le wordWidth
mo_wordUGt = MO_U_Gt wordWidth
mo_wordULt = MO_U_Lt wordWidth
mo_wordAnd = MO_And wordWidth
mo_wordOr = MO_Or wordWidth
mo_wordXor = MO_Xor wordWidth
mo_wordNot = MO_Not wordWidth
mo_wordShl = MO_Shl wordWidth
mo_wordSShr = MO_S_Shr wordWidth
mo_wordUShr = MO_U_Shr wordWidth
mo_u_8To32 = MO_UU_Conv W8 W32
mo_s_8To32 = MO_SS_Conv W8 W32
mo_u_16To32 = MO_UU_Conv W16 W32
mo_s_16To32 = MO_SS_Conv W16 W32
mo_u_8ToWord = MO_UU_Conv W8 wordWidth
mo_s_8ToWord = MO_SS_Conv W8 wordWidth
mo_u_16ToWord = MO_UU_Conv W16 wordWidth
mo_s_16ToWord = MO_SS_Conv W16 wordWidth
mo_s_32ToWord = MO_SS_Conv W32 wordWidth
mo_u_32ToWord = MO_UU_Conv W32 wordWidth
mo_WordTo8 = MO_UU_Conv wordWidth W8
mo_WordTo16 = MO_UU_Conv wordWidth W16
mo_WordTo32 = MO_UU_Conv wordWidth W32
mo_32To8 = MO_UU_Conv W32 W8
mo_32To16 = MO_UU_Conv W32 W16
-- ----------------------------------------------------------------------------
-- isCommutableMachOp
{- |
Returns 'True' if the MachOp has commutable arguments. This is used
in the platform-independent Cmm optimisations.
If in doubt, return 'False'. This generates worse code on the
native routes, but is otherwise harmless.
-}
isCommutableMachOp :: MachOp -> Bool
isCommutableMachOp mop =
case mop of
MO_Add _ -> True
MO_Eq _ -> True
MO_Ne _ -> True
MO_Mul _ -> True
MO_S_MulMayOflo _ -> True
MO_U_MulMayOflo _ -> True
MO_And _ -> True
MO_Or _ -> True
MO_Xor _ -> True
_other -> False
-- ----------------------------------------------------------------------------
-- isAssociativeMachOp
{- |
Returns 'True' if the MachOp is associative (i.e. @(x+y)+z == x+(y+z)@)
This is used in the platform-independent Cmm optimisations.
If in doubt, return 'False'. This generates worse code on the
native routes, but is otherwise harmless.
-}
isAssociativeMachOp :: MachOp -> Bool
isAssociativeMachOp mop =
case mop of
MO_Add {} -> True -- NB: does not include
MO_Mul {} -> True -- floatint point!
MO_And {} -> True
MO_Or {} -> True
MO_Xor {} -> True
_other -> False
-- ----------------------------------------------------------------------------
-- isComparisonMachOp
{- |
Returns 'True' if the MachOp is a comparison.
If in doubt, return False. This generates worse code on the
native routes, but is otherwise harmless.
-}
isComparisonMachOp :: MachOp -> Bool
isComparisonMachOp mop =
case mop of
MO_Eq _ -> True
MO_Ne _ -> True
MO_S_Ge _ -> True
MO_S_Le _ -> True
MO_S_Gt _ -> True
MO_S_Lt _ -> True
MO_U_Ge _ -> True
MO_U_Le _ -> True
MO_U_Gt _ -> True
MO_U_Lt _ -> True
MO_F_Eq {} -> True
MO_F_Ne {} -> True
MO_F_Ge {} -> True
MO_F_Le {} -> True
MO_F_Gt {} -> True
MO_F_Lt {} -> True
_other -> False
-- -----------------------------------------------------------------------------
-- Inverting conditions
-- Sometimes it's useful to be able to invert the sense of a
-- condition. Not all conditional tests are invertible: in
-- particular, floating point conditionals cannot be inverted, because
-- there exist floating-point values which return False for both senses
-- of a condition (eg. !(NaN > NaN) && !(NaN /<= NaN)).
maybeInvertComparison :: MachOp -> Maybe MachOp
maybeInvertComparison op
= case op of -- None of these Just cases include floating point
MO_Eq r -> Just (MO_Ne r)
MO_Ne r -> Just (MO_Eq r)
MO_U_Lt r -> Just (MO_U_Ge r)
MO_U_Gt r -> Just (MO_U_Le r)
MO_U_Le r -> Just (MO_U_Gt r)
MO_U_Ge r -> Just (MO_U_Lt r)
MO_S_Lt r -> Just (MO_S_Ge r)
MO_S_Gt r -> Just (MO_S_Le r)
MO_S_Le r -> Just (MO_S_Gt r)
MO_S_Ge r -> Just (MO_S_Lt r)
MO_F_Eq r -> Just (MO_F_Ne r)
MO_F_Ne r -> Just (MO_F_Eq r)
MO_F_Ge r -> Just (MO_F_Le r)
MO_F_Le r -> Just (MO_F_Ge r)
MO_F_Gt r -> Just (MO_F_Lt r)
MO_F_Lt r -> Just (MO_F_Gt r)
_other -> Nothing
-- ----------------------------------------------------------------------------
-- machOpResultType
{- |
Returns the MachRep of the result of a MachOp.
-}
machOpResultType :: MachOp -> [CmmType] -> CmmType
machOpResultType mop tys =
case mop of
MO_Add {} -> ty1 -- Preserve GC-ptr-hood
MO_Sub {} -> ty1 -- of first arg
MO_Mul r -> cmmBits r
MO_S_MulMayOflo r -> cmmBits r
MO_S_Quot r -> cmmBits r
MO_S_Rem r -> cmmBits r
MO_S_Neg r -> cmmBits r
MO_U_MulMayOflo r -> cmmBits r
MO_U_Quot r -> cmmBits r
MO_U_Rem r -> cmmBits r
MO_Eq {} -> comparisonResultRep
MO_Ne {} -> comparisonResultRep
MO_S_Ge {} -> comparisonResultRep
MO_S_Le {} -> comparisonResultRep
MO_S_Gt {} -> comparisonResultRep
MO_S_Lt {} -> comparisonResultRep
MO_U_Ge {} -> comparisonResultRep
MO_U_Le {} -> comparisonResultRep
MO_U_Gt {} -> comparisonResultRep
MO_U_Lt {} -> comparisonResultRep
MO_F_Add r -> cmmFloat r
MO_F_Sub r -> cmmFloat r
MO_F_Mul r -> cmmFloat r
MO_F_Quot r -> cmmFloat r
MO_F_Neg r -> cmmFloat r
MO_F_Eq {} -> comparisonResultRep
MO_F_Ne {} -> comparisonResultRep
MO_F_Ge {} -> comparisonResultRep
MO_F_Le {} -> comparisonResultRep
MO_F_Gt {} -> comparisonResultRep
MO_F_Lt {} -> comparisonResultRep
MO_And {} -> ty1 -- Used for pointer masking
MO_Or {} -> ty1
MO_Xor {} -> ty1
MO_Not r -> cmmBits r
MO_Shl r -> cmmBits r
MO_U_Shr r -> cmmBits r
MO_S_Shr r -> cmmBits r
MO_SS_Conv _ to -> cmmBits to
MO_UU_Conv _ to -> cmmBits to
MO_FS_Conv _ to -> cmmBits to
MO_SF_Conv _ to -> cmmFloat to
MO_FF_Conv _ to -> cmmFloat to
where
(ty1:_) = tys
comparisonResultRep :: CmmType
comparisonResultRep = bWord -- is it?
-- -----------------------------------------------------------------------------
-- machOpArgReps
-- | This function is used for debugging only: we can check whether an
-- application of a MachOp is "type-correct" by checking that the MachReps of
-- its arguments are the same as the MachOp expects. This is used when
-- linting a CmmExpr.
machOpArgReps :: MachOp -> [Width]
machOpArgReps op =
case op of
MO_Add r -> [r,r]
MO_Sub r -> [r,r]
MO_Eq r -> [r,r]
MO_Ne r -> [r,r]
MO_Mul r -> [r,r]
MO_S_MulMayOflo r -> [r,r]
MO_S_Quot r -> [r,r]
MO_S_Rem r -> [r,r]
MO_S_Neg r -> [r]
MO_U_MulMayOflo r -> [r,r]
MO_U_Quot r -> [r,r]
MO_U_Rem r -> [r,r]
MO_S_Ge r -> [r,r]
MO_S_Le r -> [r,r]
MO_S_Gt r -> [r,r]
MO_S_Lt r -> [r,r]
MO_U_Ge r -> [r,r]
MO_U_Le r -> [r,r]
MO_U_Gt r -> [r,r]
MO_U_Lt r -> [r,r]
MO_F_Add r -> [r,r]
MO_F_Sub r -> [r,r]
MO_F_Mul r -> [r,r]
MO_F_Quot r -> [r,r]
MO_F_Neg r -> [r]
MO_F_Eq r -> [r,r]
MO_F_Ne r -> [r,r]
MO_F_Ge r -> [r,r]
MO_F_Le r -> [r,r]
MO_F_Gt r -> [r,r]
MO_F_Lt r -> [r,r]
MO_And r -> [r,r]
MO_Or r -> [r,r]
MO_Xor r -> [r,r]
MO_Not r -> [r]
MO_Shl r -> [r,wordWidth]
MO_U_Shr r -> [r,wordWidth]
MO_S_Shr r -> [r,wordWidth]
MO_SS_Conv from _ -> [from]
MO_UU_Conv from _ -> [from]
MO_SF_Conv from _ -> [from]
MO_FS_Conv from _ -> [from]
MO_FF_Conv from _ -> [from]
-----------------------------------------------------------------------------
-- CallishMachOp
-----------------------------------------------------------------------------
-- CallishMachOps tend to be implemented by foreign calls in some backends,
-- so we separate them out. In Cmm, these can only occur in a
-- statement position, in contrast to an ordinary MachOp which can occur
-- anywhere in an expression.
data CallishMachOp
= MO_F64_Pwr
| MO_F64_Sin
| MO_F64_Cos
| MO_F64_Tan
| MO_F64_Sinh
| MO_F64_Cosh
| MO_F64_Tanh
| MO_F64_Asin
| MO_F64_Acos
| MO_F64_Atan
| MO_F64_Log
| MO_F64_Exp
| MO_F64_Sqrt
| MO_F32_Pwr
| MO_F32_Sin
| MO_F32_Cos
| MO_F32_Tan
| MO_F32_Sinh
| MO_F32_Cosh
| MO_F32_Tanh
| MO_F32_Asin
| MO_F32_Acos
| MO_F32_Atan
| MO_F32_Log
| MO_F32_Exp
| MO_F32_Sqrt
| MO_S_QuotRem Width
| MO_U_QuotRem Width
| MO_Add2 Width
| MO_U_Mul2 Width
| MO_WriteBarrier
| MO_Touch -- Keep variables live (when using interior pointers)
-- Note that these three MachOps all take 1 extra parameter than the
-- standard C lib versions. The extra (last) parameter contains
-- alignment of the pointers. Used for optimisation in backends.
| MO_Memcpy
| MO_Memset
| MO_Memmove
| MO_PopCnt Width
deriving (Eq, Show)
pprCallishMachOp :: CallishMachOp -> SDoc
pprCallishMachOp mo = text (show mo)
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