Pass 512-bit-wide vectors in registers.
[ghc.git] / compiler / codeGen / CgUtils.hs
1 -----------------------------------------------------------------------------
2 --
3 -- Code generator utilities; mostly monadic
4 --
5 -- (c) The University of Glasgow 2004-2006
6 --
7 -----------------------------------------------------------------------------
8
9 {-# LANGUAGE GADTs #-}
10 module CgUtils ( fixStgRegisters ) where
11
12 #include "HsVersions.h"
13
14 import CodeGen.Platform
15 import Cmm
16 import Hoopl
17 import CmmUtils
18 import CLabel
19 import DynFlags
20 import Outputable
21
22 -- -----------------------------------------------------------------------------
23 -- Information about global registers
24
25 baseRegOffset :: DynFlags -> GlobalReg -> Int
26
27 baseRegOffset dflags (VanillaReg 1 _) = oFFSET_StgRegTable_rR1 dflags
28 baseRegOffset dflags (VanillaReg 2 _) = oFFSET_StgRegTable_rR2 dflags
29 baseRegOffset dflags (VanillaReg 3 _) = oFFSET_StgRegTable_rR3 dflags
30 baseRegOffset dflags (VanillaReg 4 _) = oFFSET_StgRegTable_rR4 dflags
31 baseRegOffset dflags (VanillaReg 5 _) = oFFSET_StgRegTable_rR5 dflags
32 baseRegOffset dflags (VanillaReg 6 _) = oFFSET_StgRegTable_rR6 dflags
33 baseRegOffset dflags (VanillaReg 7 _) = oFFSET_StgRegTable_rR7 dflags
34 baseRegOffset dflags (VanillaReg 8 _) = oFFSET_StgRegTable_rR8 dflags
35 baseRegOffset dflags (VanillaReg 9 _) = oFFSET_StgRegTable_rR9 dflags
36 baseRegOffset dflags (VanillaReg 10 _) = oFFSET_StgRegTable_rR10 dflags
37 baseRegOffset _ (VanillaReg n _) = panic ("Registers above R10 are not supported (tried to use R" ++ show n ++ ")")
38 baseRegOffset dflags (FloatReg 1) = oFFSET_StgRegTable_rF1 dflags
39 baseRegOffset dflags (FloatReg 2) = oFFSET_StgRegTable_rF2 dflags
40 baseRegOffset dflags (FloatReg 3) = oFFSET_StgRegTable_rF3 dflags
41 baseRegOffset dflags (FloatReg 4) = oFFSET_StgRegTable_rF4 dflags
42 baseRegOffset dflags (FloatReg 5) = oFFSET_StgRegTable_rF5 dflags
43 baseRegOffset dflags (FloatReg 6) = oFFSET_StgRegTable_rF6 dflags
44 baseRegOffset _ (FloatReg n) = panic ("Registers above F6 are not supported (tried to use F" ++ show n ++ ")")
45 baseRegOffset dflags (DoubleReg 1) = oFFSET_StgRegTable_rD1 dflags
46 baseRegOffset dflags (DoubleReg 2) = oFFSET_StgRegTable_rD2 dflags
47 baseRegOffset dflags (DoubleReg 3) = oFFSET_StgRegTable_rD3 dflags
48 baseRegOffset dflags (DoubleReg 4) = oFFSET_StgRegTable_rD4 dflags
49 baseRegOffset dflags (DoubleReg 5) = oFFSET_StgRegTable_rD5 dflags
50 baseRegOffset dflags (DoubleReg 6) = oFFSET_StgRegTable_rD6 dflags
51 baseRegOffset _ (DoubleReg n) = panic ("Registers above D6 are not supported (tried to use D" ++ show n ++ ")")
52 baseRegOffset dflags (XmmReg 1) = oFFSET_StgRegTable_rXMM1 dflags
53 baseRegOffset dflags (XmmReg 2) = oFFSET_StgRegTable_rXMM2 dflags
54 baseRegOffset dflags (XmmReg 3) = oFFSET_StgRegTable_rXMM3 dflags
55 baseRegOffset dflags (XmmReg 4) = oFFSET_StgRegTable_rXMM4 dflags
56 baseRegOffset dflags (XmmReg 5) = oFFSET_StgRegTable_rXMM5 dflags
57 baseRegOffset dflags (XmmReg 6) = oFFSET_StgRegTable_rXMM6 dflags
58 baseRegOffset _ (XmmReg n) = panic ("Registers above XMM6 are not supported (tried to use XMM" ++ show n ++ ")")
59 baseRegOffset dflags (YmmReg 1) = oFFSET_StgRegTable_rYMM1 dflags
60 baseRegOffset dflags (YmmReg 2) = oFFSET_StgRegTable_rYMM2 dflags
61 baseRegOffset dflags (YmmReg 3) = oFFSET_StgRegTable_rYMM3 dflags
62 baseRegOffset dflags (YmmReg 4) = oFFSET_StgRegTable_rYMM4 dflags
63 baseRegOffset dflags (YmmReg 5) = oFFSET_StgRegTable_rYMM5 dflags
64 baseRegOffset dflags (YmmReg 6) = oFFSET_StgRegTable_rYMM6 dflags
65 baseRegOffset _ (YmmReg n) = panic ("Registers above YMM6 are not supported (tried to use YMM" ++ show n ++ ")")
66 baseRegOffset dflags (ZmmReg 1) = oFFSET_StgRegTable_rZMM1 dflags
67 baseRegOffset dflags (ZmmReg 2) = oFFSET_StgRegTable_rZMM2 dflags
68 baseRegOffset dflags (ZmmReg 3) = oFFSET_StgRegTable_rZMM3 dflags
69 baseRegOffset dflags (ZmmReg 4) = oFFSET_StgRegTable_rZMM4 dflags
70 baseRegOffset dflags (ZmmReg 5) = oFFSET_StgRegTable_rZMM5 dflags
71 baseRegOffset dflags (ZmmReg 6) = oFFSET_StgRegTable_rZMM6 dflags
72 baseRegOffset _ (ZmmReg n) = panic ("Registers above ZMM6 are not supported (tried to use ZMM" ++ show n ++ ")")
73 baseRegOffset dflags Sp = oFFSET_StgRegTable_rSp dflags
74 baseRegOffset dflags SpLim = oFFSET_StgRegTable_rSpLim dflags
75 baseRegOffset dflags (LongReg 1) = oFFSET_StgRegTable_rL1 dflags
76 baseRegOffset _ (LongReg n) = panic ("Registers above L1 are not supported (tried to use L" ++ show n ++ ")")
77 baseRegOffset dflags Hp = oFFSET_StgRegTable_rHp dflags
78 baseRegOffset dflags HpLim = oFFSET_StgRegTable_rHpLim dflags
79 baseRegOffset dflags CCCS = oFFSET_StgRegTable_rCCCS dflags
80 baseRegOffset dflags CurrentTSO = oFFSET_StgRegTable_rCurrentTSO dflags
81 baseRegOffset dflags CurrentNursery = oFFSET_StgRegTable_rCurrentNursery dflags
82 baseRegOffset dflags HpAlloc = oFFSET_StgRegTable_rHpAlloc dflags
83 baseRegOffset dflags EagerBlackholeInfo = oFFSET_stgEagerBlackholeInfo dflags
84 baseRegOffset dflags GCEnter1 = oFFSET_stgGCEnter1 dflags
85 baseRegOffset dflags GCFun = oFFSET_stgGCFun dflags
86 baseRegOffset _ BaseReg = panic "baseRegOffset:BaseReg"
87 baseRegOffset _ PicBaseReg = panic "baseRegOffset:PicBaseReg"
88
89
90 -- -----------------------------------------------------------------------------
91 --
92 -- STG/Cmm GlobalReg
93 --
94 -- -----------------------------------------------------------------------------
95
96 -- | We map STG registers onto appropriate CmmExprs. Either they map
97 -- to real machine registers or stored as offsets from BaseReg. Given
98 -- a GlobalReg, get_GlobalReg_addr always produces the
99 -- register table address for it.
100 get_GlobalReg_addr :: DynFlags -> GlobalReg -> CmmExpr
101 get_GlobalReg_addr dflags BaseReg = regTableOffset dflags 0
102 get_GlobalReg_addr dflags mid
103 = get_Regtable_addr_from_offset dflags
104 (globalRegType dflags mid) (baseRegOffset dflags mid)
105
106 -- Calculate a literal representing an offset into the register table.
107 -- Used when we don't have an actual BaseReg to offset from.
108 regTableOffset :: DynFlags -> Int -> CmmExpr
109 regTableOffset dflags n =
110 CmmLit (CmmLabelOff mkMainCapabilityLabel (oFFSET_Capability_r dflags + n))
111
112 get_Regtable_addr_from_offset :: DynFlags -> CmmType -> Int -> CmmExpr
113 get_Regtable_addr_from_offset dflags _ offset =
114 if haveRegBase (targetPlatform dflags)
115 then CmmRegOff (CmmGlobal BaseReg) offset
116 else regTableOffset dflags offset
117
118 -- | Fixup global registers so that they assign to locations within the
119 -- RegTable if they aren't pinned for the current target.
120 fixStgRegisters :: DynFlags -> RawCmmDecl -> RawCmmDecl
121 fixStgRegisters _ top@(CmmData _ _) = top
122
123 fixStgRegisters dflags (CmmProc info lbl live graph) =
124 let graph' = modifyGraph (mapGraphBlocks (fixStgRegBlock dflags)) graph
125 in CmmProc info lbl live graph'
126
127 fixStgRegBlock :: DynFlags -> Block CmmNode e x -> Block CmmNode e x
128 fixStgRegBlock dflags block = mapBlock (fixStgRegStmt dflags) block
129
130 fixStgRegStmt :: DynFlags -> CmmNode e x -> CmmNode e x
131 fixStgRegStmt dflags stmt = fixAssign $ mapExpDeep fixExpr stmt
132 where
133 platform = targetPlatform dflags
134
135 fixAssign stmt =
136 case stmt of
137 CmmAssign (CmmGlobal reg) src ->
138 let baseAddr = get_GlobalReg_addr dflags reg
139 in case reg `elem` activeStgRegs (targetPlatform dflags) of
140 True -> CmmAssign (CmmGlobal reg) src
141 False -> CmmStore baseAddr src
142 other_stmt -> other_stmt
143
144 fixExpr expr = case expr of
145 CmmReg (CmmGlobal reg) ->
146 -- Replace register leaves with appropriate StixTrees for
147 -- the given target. MagicIds which map to a reg on this
148 -- arch are left unchanged. For the rest, BaseReg is taken
149 -- to mean the address of the reg table in MainCapability,
150 -- and for all others we generate an indirection to its
151 -- location in the register table.
152 case reg `elem` activeStgRegs platform of
153 True -> expr
154 False ->
155 let baseAddr = get_GlobalReg_addr dflags reg
156 in case reg of
157 BaseReg -> baseAddr
158 _other -> CmmLoad baseAddr (globalRegType dflags reg)
159
160 CmmRegOff (CmmGlobal reg) offset ->
161 -- RegOf leaves are just a shorthand form. If the reg maps
162 -- to a real reg, we keep the shorthand, otherwise, we just
163 -- expand it and defer to the above code.
164 case reg `elem` activeStgRegs platform of
165 True -> expr
166 False -> CmmMachOp (MO_Add (wordWidth dflags)) [
167 fixExpr (CmmReg (CmmGlobal reg)),
168 CmmLit (CmmInt (fromIntegral offset)
169 (wordWidth dflags))]
170
171 other_expr -> other_expr
172