2006-04-28 19:23:50 -04:00
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! Copyright (C) 2005, 2006 Slava Pestov.
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2006-04-30 16:13:35 -04:00
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! See http://factorcode.org/license.txt for BSD license.
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2006-05-01 20:45:40 -04:00
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USING: alien arrays assembler kernel kernel-internals lists math
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math-internals namespaces sequences words ;
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2006-04-03 02:18:56 -04:00
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IN: compiler
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2006-04-28 19:23:50 -04:00
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2006-05-04 18:08:52 -04:00
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! Type checks
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2006-04-30 16:13:35 -04:00
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\ tag [
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"in" operand tag-mask AND
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"in" operand tag-bits SHL
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] H{
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{ +input { { f "in" } } }
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{ +output { "in" } }
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} define-intrinsic
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\ type [
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#! Intrinstic version of type primitive.
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<label> "header" set
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<label> "f" set
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<label> "end" set
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! Make a copy
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"x" operand "obj" operand MOV
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! Get the tag
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"obj" operand tag-mask AND
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! Compare with object tag number (3).
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"obj" operand object-tag CMP
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! Jump if the object doesn't store type info in its header
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"header" get JE
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! It doesn't store type info in its header
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"obj" operand tag-bits SHL
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"end" get JMP
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"header" get save-xt
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! It does store type info in its header
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! Is the pointer itself equal to 3? Then its F_TYPE (9).
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"x" operand object-tag CMP
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"f" get JE
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! The pointer is not equal to 3. Load the object header.
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"obj" operand "x" operand object-tag neg [+] MOV
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! Mask off header tag, making a fixnum.
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"obj" operand object-tag XOR
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"end" get JMP
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"f" get save-xt
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! The pointer is equal to 3. Load F_TYPE (9).
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"obj" operand f type tag-bits shift MOV
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"end" get save-xt
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] H{
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{ +input { { f "obj" } } }
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{ +scratch { { f "x" } { f "y" } } }
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{ +output { "obj" } }
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} define-intrinsic
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! Slots
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: untag ( reg -- ) tag-mask bitnot AND ;
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\ slot [
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"obj" operand untag
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! turn tagged fixnum slot # into an offset, multiple of 4
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"n" operand fixnum>slot@
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! compute slot address
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"obj" operand "n" operand ADD
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! load slot value
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"obj" operand dup [] MOV
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] H{
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{ +input { { f "obj" } { f "n" } } }
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{ +output { "obj" } }
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{ +clobber { "n" } }
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} define-intrinsic
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: card-offset 1 getenv ; inline
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: generate-write-barrier ( -- )
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#! Mark the card pointed to by vreg.
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"obj" operand card-bits SHR
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"obj" operand card-offset ADD rel-absolute-cell rel-cards
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"obj" operand [] card-mark OR ;
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! \ set-slot [
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! "obj" operand untag
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! ! turn tagged fixnum slot # into an offset
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! "slot" operand fixnum>slot@
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! ! compute slot address
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! "obj" operand "slot" operand ADD
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! ! store new slot value
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! "obj" operand [] "val" operand MOV
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! generate-write-barrier
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! ] H{
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! { +input { { f "val" } { f "obj" } { f "slot" } } }
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! { +clobber { "obj" "slot" } }
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! } define-intrinsic
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\ char-slot [
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EBX PUSH
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"n" operand 2 SHR
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EBX dup XOR
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"obj" operand "n" operand ADD
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BX "obj" operand string-offset [+] MOV
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EBX tag-bits SHL
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"obj" operand EBX MOV
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EBX POP
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] H{
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{ +input { { f "n" } { f "obj" } } }
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{ +output { "obj" } }
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{ +clobber { "n" } }
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} define-intrinsic
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\ set-char-slot [
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EBX PUSH
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"val" operand tag-bits SHR
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"slot" operand 2 SHR
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"obj" operand "slot" operand ADD
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EBX "val" operand MOV
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"obj" operand string-offset [+] BX MOV
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EBX POP
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] H{
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{ +input { { f "val" } { f "slot" } { f "obj" } } }
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{ +clobber { "val" "slot" "obj" } }
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} define-intrinsic
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! Fixnums
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: define-fixnum-op ( word op -- )
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[ [ "x" operand "y" operand ] % , ] [ ] make H{
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{ +input { { f "x" } { f "y" } } }
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{ +output { "x" } }
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} define-intrinsic ;
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{
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{ fixnum+fast ADD }
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{ fixnum-fast SUB }
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{ fixnum-bitand AND }
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{ fixnum-bitor OR }
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{ fixnum-bitxor XOR }
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} [
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first2 define-fixnum-op
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] each
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\ fixnum-bitnot [
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"x" operand NOT
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"x" operand tag-mask XOR
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] H{
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{ +input { { f "x" } } }
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{ +output { "x" } }
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} define-intrinsic
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! This has specific register requirements. Inputs are in
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! ECX and EAX, and the result is in EDX.
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\ fixnum-mod [
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prepare-division
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"y" operand IDIV
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] H{
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{ +input { { 0 "x" } { 1 "y" } } }
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{ +scratch { { 2 "out" } } }
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{ +output { "out" } }
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} define-intrinsic
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: ?MOV ( dst src -- ) 2dup = [ 2drop ] [ MOV ] if ;
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: unique-operands ( operands quot -- )
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>r [ operand ] map prune r> each ; inline
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: simple-overflow ( word -- )
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finalize-contents
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"z" operand "x" operand MOV
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"z" operand "y" operand pick execute
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! If the previous arithmetic operation overflowed, then we
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! turn the result into a bignum and leave it in EAX.
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<label> "end" set
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"end" get JNO
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! There was an overflow. Recompute the original operand.
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{ "y" "x" } [ tag-bits SAR ] unique-operands
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"x" operand "y" operand rot execute
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"s48_long_to_bignum" f "x" operand 1array compile-c-call*
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! An untagged pointer to the bignum is now in EAX; tag it
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T{ int-regs } return-reg bignum-tag OR
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"z" operand T{ int-regs } return-reg ?MOV
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"end" get save-xt ; inline
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: simple-overflow-template ( word insn -- )
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[ simple-overflow ] curry H{
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{ +input { { f "x" } { f "y" } } }
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{ +scratch { { f "z" } } }
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{ +output { "z" } }
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{ +clobber { "x" "y" } }
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} define-intrinsic ;
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\ fixnum+ \ ADD simple-overflow-template
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\ fixnum- \ SUB simple-overflow-template
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\ fixnum* [
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finalize-contents
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"y" operand tag-bits SAR
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"y" operand IMUL
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<label> "end" set
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"end" get JNO
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"s48_fixnum_pair_to_bignum" f
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"x" operand remainder-reg 2array compile-c-call*
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! now we have to shift it by three bits to remove the second
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! tag
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"s48_bignum_arithmetic_shift" f
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"x" operand tag-bits neg 2array compile-c-call*
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! an untagged pointer to the bignum is now in EAX; tag it
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T{ int-regs } return-reg bignum-tag OR
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"end" get save-xt
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] H{
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{ +input { { 0 "x" } { 1 "y" } } }
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{ +output { "x" } }
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} define-intrinsic
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2006-05-01 20:45:40 -04:00
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: generate-fixnum/mod
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#! The same code is used for fixnum/i and fixnum/mod.
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#! This has specific register
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#! ECX and EAX, and the result is in EDX.
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<label> "end" set
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prepare-division
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"y" operand IDIV
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! Make a copy since following shift is destructive
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"y" operand "x" operand MOV
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! Tag the value, since division cancelled tags from both
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! inputs
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"x" operand tag-bits SHL
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! Did it overflow?
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"end" get JNO
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! There was an overflow, so make ECX into a bignum. we must
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! save EDX since its volatile.
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remainder-reg PUSH
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"s48_long_to_bignum" f
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"y" operand 1array compile-c-call*
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! An untagged pointer to the bignum is now in EAX; tag it
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T{ int-regs } return-reg bignum-tag OR
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! the remainder is now in EDX
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remainder-reg POP
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"end" get save-xt ;
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\ fixnum/i [ generate-fixnum/mod ] H{
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{ +input { { 0 "x" } { 1 "y" } } }
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{ +scratch { { 2 "out" } } }
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{ +output { "x" } }
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{ +clobber { "x" "y" } }
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} define-intrinsic
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2006-05-01 22:12:08 -04:00
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2006-05-01 20:45:40 -04:00
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\ fixnum/mod [ generate-fixnum/mod ] H{
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{ +input { { 0 "x" } { 1 "y" } } }
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{ +scratch { { 2 "out" } } }
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{ +output { "x" "out" } }
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{ +clobber { "x" "y" } }
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} define-intrinsic
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2006-04-30 16:13:35 -04:00
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2006-05-04 18:08:52 -04:00
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: define-fixnum-jump ( word op -- )
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[
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[ end-basic-block "x" operand "y" operand CMP ] % ,
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] [ ] make H{
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{ +input { { f "x" } { f "y" } } }
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} define-if-intrinsic ;
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{
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{ fixnum< JL }
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{ fixnum<= JLE }
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{ fixnum> JG }
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{ fixnum>= JGE }
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{ eq? JE }
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} [
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first2 define-fixnum-jump
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] each
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2006-05-04 18:08:52 -04:00
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! User environment
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: %userenv ( -- )
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"x" operand "userenv" f dlsym MOV
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0 rel-absolute-cell rel-userenv
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"n" operand 1 SHR
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"n" operand "x" operand ADD ;
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2005-05-09 22:34:47 -04:00
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2006-04-30 16:13:35 -04:00
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\ getenv [
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%userenv "n" operand dup [] MOV
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] H{
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{ +input { { f "n" } } }
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{ +scratch { { f "x" } } }
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{ +output { "n" } }
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} define-intrinsic
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2005-05-09 02:34:15 -04:00
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\ setenv [
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%userenv "n" operand [] "val" operand MOV
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] H{
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{ +input { { f "val" } { f "n" } } }
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{ +scratch { { f "x" } } }
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{ +clobber { "n" } }
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} define-intrinsic
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