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%
% (c) The AQUA Project, Glasgow University, 1993-1998
%
\begin{code}
module StixInteger (
gmpCompare,
gmpCompareInt,
gmpInteger2Int,
gmpInteger2Word,
gmpNegate
) where
#include "HsVersions.h"
import {-# SOURCE #-} StixPrim ( amodeToStix )
import AbsCSyn hiding (spRel) -- bits and bobs..
import CallConv ( cCallConv )
import PrimOp ( PrimOp(..) )
import PrimRep ( PrimRep(..) )
import Stix ( StixTree(..), StixTreeList, arrWordsHS )
import UniqSupply ( returnUs, UniqSM )
\end{code}
Although gmpCompare doesn't allocate space, it does temporarily use
some space just beyond the heap pointer. This is safe, because the
enclosing routine has already guaranteed that this space will be
available. (See ``primOpHeapRequired.'')
\begin{code}
stgArrWords__words :: StixTree -> StixTree
stgArrWords__BYTE_ARR_CTS :: StixTree -> StixTree
stgArrWords__BYTE_ARR_CTS arr
= StIndex WordRep arr arrWordsHS
stgArrWords__words arr
= case arrWordsHS of
StInt i -> StInd WordRep (StIndex PtrRep arr (StInt (i-1)))
gmpCompare
:: CAddrMode -- result (boolean)
-> (CAddrMode,CAddrMode,CAddrMode,CAddrMode)
-- alloc hp + 2 arguments (2 parts each)
-> UniqSM StixTreeList
gmpCompare res args@(csa1,cda1, csa2,cda2)
= let
result = amodeToStix res
sa1 = amodeToStix csa1
sa2 = amodeToStix csa2
aa1 = stgArrWords__words (amodeToStix cda1)
aa2 = stgArrWords__words (amodeToStix cda2)
da1 = stgArrWords__BYTE_ARR_CTS (amodeToStix cda1)
da2 = stgArrWords__BYTE_ARR_CTS (amodeToStix cda2)
(a1,a2,a3) = toStruct scratch1 (aa1,sa1,da1)
(a4,a5,a6) = toStruct scratch2 (aa2,sa2,da2)
mpz_cmp = StCall SLIT("__gmpz_cmp") cCallConv IntRep [scratch1, scratch2]
r1 = StAssign IntRep result mpz_cmp
in
returnUs (\xs -> a1 : a2 : a3 : a4 : a5 : a6 : r1 : xs)
gmpCompareInt
:: CAddrMode -- result (boolean)
-> (CAddrMode,CAddrMode,CAddrMode)
-> UniqSM StixTreeList -- alloc hp + 1 arg (??)
gmpCompareInt res args@(csa1,cda1, cai)
= let
result = amodeToStix res
sa1 = amodeToStix csa1
aa1 = stgArrWords__words (amodeToStix cda1)
da1 = stgArrWords__BYTE_ARR_CTS (amodeToStix cda1)
ai = amodeToStix cai
(a1,a2,a3) = toStruct scratch1 (aa1,sa1,da1)
mpz_cmp_si = StCall SLIT("__gmpz_cmp_si") cCallConv IntRep [scratch1, ai]
r1 = StAssign IntRep result mpz_cmp_si
in
returnUs (\xs -> a1 : a2 : a3 : r1 : xs)
\end{code}
\begin{code}
gmpInteger2Int
:: CAddrMode -- result
-> (CAddrMode,CAddrMode) -- alloc hp + argument (2 parts)
-> UniqSM StixTreeList
gmpInteger2Int res args@(csa,cda)
= let
result = amodeToStix res
sa = amodeToStix csa
aa = stgArrWords__words (amodeToStix cda)
da = stgArrWords__BYTE_ARR_CTS (amodeToStix cda)
(a1,a2,a3) = toStruct scratch1 (aa,sa,da)
mpz_get_si = StCall SLIT("__gmpz_get_si") cCallConv IntRep [scratch1]
r1 = StAssign IntRep result mpz_get_si
in
returnUs (\xs -> a1 : a2 : a3 : r1 : xs)
gmpInteger2Word
:: CAddrMode -- result
-> (CAddrMode,CAddrMode) -- alloc hp + argument (2 parts)
-> UniqSM StixTreeList
gmpInteger2Word res args@(csa,cda)
= let
result = amodeToStix res
sa = amodeToStix csa
aa = stgArrWords__words (amodeToStix cda)
da = stgArrWords__BYTE_ARR_CTS (amodeToStix cda)
(a1,a2,a3) = toStruct scratch1 (aa,sa,da)
mpz_get_ui = StCall SLIT("__gmpz_get_ui") cCallConv IntRep [scratch1]
r1 = StAssign WordRep result mpz_get_ui
in
returnUs (\xs -> a1 : a2 : a3 : r1 : xs)
gmpNegate
:: (CAddrMode,CAddrMode) -- result
-> (CAddrMode,CAddrMode) -- argument (2 parts)
-> UniqSM StixTreeList
gmpNegate (rcs, rcd) args@(cs, cd)
= let
s = amodeToStix cs
a = stgArrWords__words (amodeToStix cd)
d = stgArrWords__BYTE_ARR_CTS (amodeToStix cd)
rs = amodeToStix rcs
ra = stgArrWords__words (amodeToStix rcd)
rd = stgArrWords__BYTE_ARR_CTS (amodeToStix rcd)
a1 = StAssign IntRep ra a
a2 = StAssign IntRep rs (StPrim IntNegOp [s])
a3 = StAssign PtrRep rd d
in
returnUs (\xs -> a1 : a2 : a3 : xs)
\end{code}
Support for the Gnu GMP multi-precision package.
\begin{code}
-- size (in words) of __MP_INT
mpIntSize = 3 :: Int
mpAlloc, mpSize, mpData :: StixTree -> StixTree
mpAlloc base = StInd IntRep base
mpSize base = StInd IntRep (StIndex IntRep base (StInt 1))
mpData base = StInd PtrRep (StIndex IntRep base (StInt 2))
\end{code}
\begin{code}
toStruct
:: StixTree
-> (StixTree, StixTree, StixTree)
-> (StixTree, StixTree, StixTree)
toStruct str (alloc,size,arr)
= let
f1 = StAssign IntRep (mpAlloc str) alloc
f2 = StAssign IntRep (mpSize str) size
f3 = StAssign PtrRep (mpData str) arr
in
(f1, f2, f3)
scratch1 = StScratchWord 0
scratch2 = StScratchWord mpIntSize
\end{code}
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