#include "HsVersions.h"
import Outputable
-import PrimRep ( PrimRep(..), getPrimRepSize )
+import SMRep ( CgRep(..), cgRepSizeW )
import ForeignCall ( CCallConv(..) )
-- DON'T remove apparently unused imports here ..
-- there is ifdeffery below
import DATA_BITS ( Bits(..), shiftR, shiftL )
import Foreign ( newArray )
+import Data.List ( mapAccumL )
import DATA_WORD ( Word8, Word32 )
import Foreign ( Ptr )
we don't clear our own (single) arg off the C stack.
-}
mkMarshalCode :: CCallConv
- -> (Int, PrimRep) -> Int -> [(Int, PrimRep)]
+ -> (Int, CgRep) -> Int -> [(Int, CgRep)]
-> IO (Ptr Word8)
mkMarshalCode cconv (r_offW, r_rep) addr_offW arg_offs_n_reps
= let bytes = mkMarshalCode_wrk cconv (r_offW, r_rep)
mkMarshalCode_wrk :: CCallConv
- -> (Int, PrimRep) -> Int -> [(Int, PrimRep)]
+ -> (Int, CgRep) -> Int -> [(Int, CgRep)]
-> [Word8]
mkMarshalCode_wrk cconv (r_offW, r_rep) addr_offW arg_offs_n_reps
offsets_to_pushW
= concat
[ -- reversed because x86 is little-endian
- reverse [a_offW .. a_offW + getPrimRepSize a_rep - 1]
+ reverse [a_offW .. a_offW + cgRepSizeW a_rep - 1]
-- reversed because args are pushed L -> R onto C stack
| (a_offW, a_rep) <- reverse arg_offs_n_reps
++ movl_offespmem_esi 32
{- For each arg in args_offs_n_reps, examine the associated
- PrimRep to determine how many words there are. This gives a
+ CgRep to determine how many words there are. This gives a
bunch of offsets on the H stack to copy to the C stack:
movl off1(%esi), %ecx
f64 = fstpl_offesimem 0
in
case r_rep of
- CharRep -> i32
- IntRep -> i32
- WordRep -> i32
- AddrRep -> i32
- DoubleRep -> f64
- FloatRep -> f32
- -- Word64Rep -> i64
- -- Int64Rep -> i64
- VoidRep -> []
+ NonPtrArg -> i32
+ DoubleArg -> f64
+ FloatArg -> f32
+ -- LongArg -> i64
+ VoidArg -> []
other -> moan64 "ByteCodeFFI.mkMarshalCode_wrk(x86)"
(ppr r_rep)
offsets_to_pushW
= concat
- [ [a_offW .. a_offW + getPrimRepSize a_rep - 1]
+ [ [a_offW .. a_offW + cgRepSizeW a_rep - 1]
| (a_offW, a_rep) <- arg_offs_n_reps
]
[mkSAVE sp (- ({-92-}112 + 4*argWs_on_stack_ROUNDED_UP)) sp]
{- For each arg in args_offs_n_reps, examine the associated
- PrimRep to determine how many words there are. This gives a
+ CgRep to determine how many words there are. This gives a
bunch of offsets on the H stack. Move the first 6 words into
%o0 .. %o5 and the rest on the stack, starting at [%sp+92].
Use %g1 as a temp.
f64 = [mkSTF f0 i0 0, mkSTF f1 i0 4]
in
case r_rep of
- CharRep -> i32
- IntRep -> i32
- WordRep -> i32
- AddrRep -> i32
- DoubleRep -> f64
- FloatRep -> f32
- VoidRep -> []
+ NonPtrArg -> i32
+ DoubleArg -> f64
+ FloatArg -> f32
+ VoidArg -> []
other -> moan64 "ByteCodeFFI.mkMarshalCode_wrk(sparc)"
(ppr r_rep)
++ [mkRET,
mkRESTORE_TRIVIAL] -- this is in the delay slot of the RET
)
-#elif powerpc_TARGET_ARCH
+#elif powerpc_TARGET_ARCH && darwin_TARGET_OS
= let
bytes_per_word = 4
result_off = r_offW * bytes_per_word
linkageArea = 24
- parameterArea = sum [ getPrimRepSize a_rep * bytes_per_word
+ parameterArea = sum [ cgRepSizeW a_rep * bytes_per_word
| (_, a_rep) <- arg_offs_n_reps ]
savedRegisterArea = 4
frameSize = padTo16 (linkageArea + max parameterArea 32 + savedRegisterArea)
pass_parameters ((a_offW, a_rep):args) nextFPR offsetW =
let
haskellArgOffset = a_offW * bytes_per_word
- offsetW' = offsetW + getPrimRepSize a_rep
+ offsetW' = offsetW + cgRepSizeW a_rep
pass_word w
| offsetW + w < 8 =
dst = linkageArea + (offsetW+w) * bytes_per_word
in
case a_rep of
- FloatRep | nextFPR < 14 ->
+ FloatArg | nextFPR < 14 ->
(0xc01f0000 -- lfs fX, haskellArgOffset(r31)
.|. (fromIntegral haskellArgOffset .&. 0xFFFF)
.|. (fromIntegral nextFPR `shiftL` 21))
: pass_parameters args (nextFPR+1) offsetW'
- DoubleRep | nextFPR < 14 ->
+ DoubleArg | nextFPR < 14 ->
(0xc81f0000 -- lfd fX, haskellArgOffset(r31)
.|. (fromIntegral haskellArgOffset .&. 0xFFFF)
.|. (fromIntegral nextFPR `shiftL` 21))
: pass_parameters args (nextFPR+1) offsetW'
_ ->
- concatMap pass_word [0 .. getPrimRepSize a_rep - 1]
+ concatMap pass_word [0 .. cgRepSizeW a_rep - 1]
++ pass_parameters args nextFPR offsetW'
gather_result = case r_rep of
- VoidRep -> []
- FloatRep ->
+ VoidArg -> []
+ FloatArg ->
[0xd03f0000 .|. (fromIntegral result_off .&. 0xFFFF)]
-- stfs f1, result_off(r31)
- DoubleRep ->
+ DoubleArg ->
[0xd83f0000 .|. (fromIntegral result_off .&. 0xFFFF)]
- -- stfs f1, result_off(r31)
- _ | getPrimRepSize r_rep == 2 ->
+ -- stfd f1, result_off(r31)
+ _ | cgRepSizeW r_rep == 2 ->
[0x907f0000 .|. (fromIntegral result_off .&. 0xFFFF),
0x909f0000 .|. (fromIntegral (result_off+4) .&. 0xFFFF)]
-- stw r3, result_off(r31)
-- stw r4, result_off+4(r31)
- _ | getPrimRepSize r_rep == 1 ->
+ _ | cgRepSizeW r_rep == 1 ->
[0x907f0000 .|. (fromIntegral result_off .&. 0xFFFF)]
-- stw r3, result_off(r31)
in
0x7c0803a6, -- mtlr r0
0x4e800020 -- blr
]
+
+#elif powerpc_TARGET_ARCH && linux_TARGET_OS
+
+ -- All offsets here are measured in Words (not bytes). This includes
+ -- arguments to the load/store machine code generators, alignment numbers
+ -- and the final 'framesize' among others.
+
+ = concatMap w32_to_w8s_bigEndian $ [
+ 0x7c0802a6, -- mflr r0
+ 0x93e1fffc, -- stw r31,-4(r1)
+ 0x90010008, -- stw r0,8(r1)
+ 0x94210000 .|. offset (-framesize), -- stwu r1, -frameSize(r1)
+ 0x7c7f1b78 -- mr r31, r3
+ ] ++ pass_parameters ++ -- pass the parameters
+ loadWord 12 addr_offW ++ [ -- lwz r12, a_off(r31)
+ 0x7d8903a6, -- mtctr r12
+ 0x4e800421 -- bctrl
+ ] ++ gather_result ++ [ -- save the return value
+ 0x80210000, -- lwz r1, 0(r1)
+ 0x83e1fffc, -- lwz r31, -4(r1)
+ 0x80010008, -- lwz r0, 8(r1)
+ 0x7c0803a6, -- mtlr r0
+ 0x4e800020 -- blr
+ ]
+
+ where
+ gather_result :: [Word32]
+ gather_result = case r_rep of
+ VoidArg -> []
+ FloatArg -> storeFloat 1 r_offW
+ DoubleArg -> storeDouble 1 r_offW
+ LongArg -> storeLong 3 r_offW
+ _ -> storeWord 3 r_offW
+
+ pass_parameters :: [Word32]
+ pass_parameters = concat params
+
+ -- vector aligned (4 word = 16 bytes) with 8 extra words of buffer space
+ framesize = alignedTo 4 (argsize + 8)
+
+ ((_,_,argsize), params) = mapAccumL loadparam (3,1,2) arg_offs_n_reps
+
+ -- handle one argument, returning machine code and the updated state
+ loadparam :: (Int, Int, Int) -> (Int, CgRep) ->
+ ((Int, Int, Int), [Word32])
+
+ loadparam (gpr, fpr, stack) (ofs, rep) = case rep of
+ FloatArg | fpr <= 8 -> ( (gpr, fpr + 1, stack), loadFloat fpr ofs )
+ FloatArg -> ( (gpr, fpr, stack + 1), stackWord stack ofs )
+
+ DoubleArg | fpr <= 8 -> ( (gpr, fpr + 1, stack), loadDouble fpr ofs )
+ DoubleArg -> ( (gpr, fpr, astack + 2), stackLong astack ofs )
+
+ LongArg | even gpr -> loadparam (gpr + 1, fpr, stack) (ofs, rep)
+ LongArg | gpr <= 9 -> ( (gpr + 2, fpr, stack), loadLong gpr ofs )
+ LongArg -> ( (gpr, fpr, astack + 2), stackLong astack ofs )
+
+ _ | gpr <= 10 -> ( (gpr + 1, fpr, stack), loadWord gpr ofs )
+ _ -> ( (gpr, fpr, stack + 1), stackWord stack ofs )
+ where astack = alignedTo 2 stack
+
+ alignedTo :: Int -> Int -> Int
+ alignedTo alignment x = case x `mod` alignment of
+ 0 -> x
+ y -> x - y + alignment
+
+ -- convenience macros to do multiple-instruction data moves
+ stackWord dst src = loadWord 0 src ++ storeWordC 0 dst
+ stackLong dst src = stackWord dst src ++ stackWord (dst + 1) (src + 1)
+ loadLong dst src = loadWord dst src ++ loadWord (dst + 1) (src + 1)
+ storeLong dst src = storeWord dst src ++ storeWord (dst + 1) (src + 1)
+
+ -- load data from the Haskell stack (relative to r31)
+ loadFloat = loadstoreInstr 0xc01f0000 -- lfs fpr, ofs(r31)
+ loadDouble = loadstoreInstr 0xc81f0000 -- lfd fpr, ofs(r31)
+ loadWord = loadstoreInstr 0x801f0000 -- lwz gpr, ofs(r31)
+
+ -- store data to the Haskell stack (relative to r31)
+ storeFloat = loadstoreInstr 0xd01f0000 -- stfs fpr, ofs(r31)
+ storeDouble = loadstoreInstr 0xd81f0000 -- stfd fpr, ofs(r31)
+ storeWord = loadstoreInstr 0x901f0000 -- stw gpr, ofs(r31)
+
+ -- store data to the C stack (relative to r1)
+ storeWordC = loadstoreInstr 0x90010000 -- stw gpr, ofs(r1)
+
+ -- machine code building blocks
+ loadstoreInstr :: Word32 -> Int -> Int -> [Word32]
+ loadstoreInstr code reg ofs = [ code .|. register reg .|. offset ofs ]
+
+ register :: Int -> Word32
+ register reg = fromIntegral reg `shiftL` 21
+
+ offset :: Int -> Word32
+ offset ofs = fromIntegral (ofs * 4) .&. 0xFFFF
+
+ -- speaks for itself
+ w32_to_w8s_bigEndian :: Word32 -> [Word8]
+ w32_to_w8s_bigEndian w = [fromIntegral (0xFF .&. (w `shiftR` 24)),
+ fromIntegral (0xFF .&. (w `shiftR` 16)),
+ fromIntegral (0xFF .&. (w `shiftR` 8)),
+ fromIntegral (0xFF .&. w)]
+
#else
- = undefined
+ = error "mkMarshalCode not implemented for this platform."
#endif
projects / ghc-hetmet.git / blobdiff