2 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
4 \section[Constants]{Info about this compilation}
7 module Constants (module Constants) where
9 import Data.Bits (shiftL)
11 -- This magical #include brings in all the everybody-knows-these magic
12 -- constants unfortunately, we need to be *explicit* about which one
13 -- we want; if we just hope a -I... will get the right one, we could
16 #include "HsVersions.h"
17 #include "../includes/MachRegs.h"
18 #include "../includes/Constants.h"
19 #include "../includes/MachDeps.h"
20 #include "../includes/DerivedConstants.h"
29 mAX_TUPLE_SIZE = 62 -- Should really match the number
30 -- of decls in Data.Tuple
32 mAX_CONTEXT_REDUCTION_DEPTH :: Int
33 mAX_CONTEXT_REDUCTION_DEPTH = 20
38 -- specialised fun/thunk/constr closure types
39 mAX_SPEC_THUNK_SIZE :: Int
40 mAX_SPEC_THUNK_SIZE = MAX_SPEC_THUNK_SIZE
42 mAX_SPEC_FUN_SIZE :: Int
43 mAX_SPEC_FUN_SIZE = MAX_SPEC_FUN_SIZE
45 mAX_SPEC_CONSTR_SIZE :: Int
46 mAX_SPEC_CONSTR_SIZE = MAX_SPEC_CONSTR_SIZE
48 -- pre-compiled thunk types
49 mAX_SPEC_SELECTEE_SIZE :: Int
50 mAX_SPEC_SELECTEE_SIZE = MAX_SPEC_SELECTEE_SIZE
52 mAX_SPEC_AP_SIZE :: Int
53 mAX_SPEC_AP_SIZE = MAX_SPEC_AP_SIZE
55 -- closure sizes: these do NOT include the header (see below for header sizes)
56 mIN_PAYLOAD_SIZE ::Int
57 mIN_PAYLOAD_SIZE = MIN_PAYLOAD_SIZE
61 mIN_INTLIKE, mAX_INTLIKE :: Int
62 mIN_INTLIKE = MIN_INTLIKE
63 mAX_INTLIKE = MAX_INTLIKE
65 mIN_CHARLIKE, mAX_CHARLIKE :: Int
66 mIN_CHARLIKE = MIN_CHARLIKE
67 mAX_CHARLIKE = MAX_CHARLIKE
70 A section of code-generator-related MAGIC CONSTANTS.
73 mAX_Vanilla_REG :: Int
74 mAX_Vanilla_REG = MAX_VANILLA_REG
77 mAX_Float_REG = MAX_FLOAT_REG
80 mAX_Double_REG = MAX_DOUBLE_REG
83 mAX_Long_REG = MAX_LONG_REG
85 mAX_Real_Vanilla_REG :: Int
86 mAX_Real_Vanilla_REG = MAX_REAL_VANILLA_REG
88 mAX_Real_Float_REG :: Int
89 mAX_Real_Float_REG = MAX_REAL_FLOAT_REG
91 mAX_Real_Double_REG :: Int
92 mAX_Real_Double_REG = MAX_REAL_DOUBLE_REG
94 mAX_Real_Long_REG :: Int
95 #ifdef MAX_REAL_LONG_REG
96 mAX_Real_Long_REG = MAX_REAL_LONG_REG
102 Closure header sizes.
106 sTD_HDR_SIZE = STD_HDR_SIZE
109 pROF_HDR_SIZE = PROF_HDR_SIZE
112 gRAN_HDR_SIZE = GRAN_HDR_SIZE
115 Size of a double in StgWords.
119 dOUBLE_SIZE = SIZEOF_DOUBLE
125 iNT64_SIZE = wORD64_SIZE
128 This tells the native code generator the size of the spill
129 area is has available.
132 rESERVED_C_STACK_BYTES :: Int
133 rESERVED_C_STACK_BYTES = RESERVED_C_STACK_BYTES
136 The amount of (Haskell) stack to leave free for saving registers when
137 returning to the scheduler.
140 rESERVED_STACK_WORDS :: Int
141 rESERVED_STACK_WORDS = RESERVED_STACK_WORDS
144 Continuations that need more than this amount of stack should do their
145 own stack check (see bug #1466).
148 aP_STACK_SPLIM :: Int
149 aP_STACK_SPLIM = AP_STACK_SPLIM
152 Size of a word, in bytes
156 wORD_SIZE = SIZEOF_HSWORD
158 wORD_SIZE_IN_BITS :: Int
159 wORD_SIZE_IN_BITS = wORD_SIZE * 8
162 Amount of pointer bits used for semi-tagging constructor closures
169 tAG_MASK = (1 `shiftL` tAG_BITS) - 1
172 mAX_PTR_TAG = tAG_MASK
175 Size of a C int, in bytes. May be smaller than wORD_SIZE.
179 cINT_SIZE = SIZEOF_INT
182 Size of a storage manager block (in bytes).
186 bLOCK_SIZE = BLOCK_SIZE
188 bLOCK_SIZE_W = bLOCK_SIZE `quot` wORD_SIZE
191 Number of bits to shift a bitfield left by in an info table.
194 bITMAP_BITS_SHIFT :: Int
195 bITMAP_BITS_SHIFT = BITMAP_BITS_SHIFT
198 Constants derived from headers in ghc/includes, generated by the program
199 ../includes/mkDerivedConstants.c.
202 #include "../includes/GHCConstants.h"