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|
<
"str" enterSubScope
<
# allocate an uninitialized string
# 0 -> number of data bytes to allocate
# 0 <- the string
[[
/rbx :popqReg
/rdi :popqReg
/rdi :pushqReg
/rdi ::unboxInteger
24 /rdi :addqImm8Reg
::internalAllocate /rax :movqImmReg
/rax :callqReg
# set type
%10 7 /rax :orbImmMemDisp8
# clear hash value
/rdx /rdx :xorqRegReg
/rdx 8 /rax :movqRegMemDisp8
# set exact length
/rdi :popqReg
/rdi ::unboxInteger
/rdi 16 /rax :movqRegMemDisp8
/rax :pushqReg
/rbx :pushqReg
:retn
]] /eyalloc defv
# reduce exact string length in place
# 0 -> string to shorten
# 1 -> length of prefix
# 0 <- the same string (but now with exact length field overwritten)
# this effectively creates a prefix of the string
[[
/rbx :popqReg
/rax :popqReg
/rcx :popqReg
/rcx ::unboxInteger
16 /rax /rcx :cmpqMemDisp8Reg
/ok :jbeLbl8
"prefix length above string length in inplacePrefix" ::outputError
:ud2
@ok
/rcx 16 /rax :movqRegMemDisp8
/rcx /rcx :xorqRegReg
/rcx 8 /rax :movqRegMemDisp8 # reset hash value
/rax :pushqReg
/rbx :pushqReg
:retn
]] /eyinplacePrefix defv
# calculate a string infix
# 0 -> string to shorten
# 1 -> first position after the infix
# 2 -> first position in the infix
[[
/rbx :popqReg
/rcx :popqReg # rcx == string
16 /rcx /rbp :movqMemDisp8Reg
/rdi :popqReg
/rdi ::unboxInteger
0 /rdi :cmpqImm8Reg
/positiveEndOffset :jgeLbl8
/rbp /rdi :addqRegReg
@positiveEndOffset
/rsi :popqReg
/rsi ::unboxInteger
0 /rsi :cmpqImm8Reg
/positiveStartOffset :jgeLbl8
/rbp /rsi :addqRegReg
@positiveStartOffset
# rdi == end offset
# rsi == start offset
/rcx :pushqReg
/rsi :pushqReg
/rsi /rdi :subqRegReg
/negativeLengthInfix :jsLbl8
@negativeLengthInfixFixed
/rdi :pushqReg
::internalAllocateString /rax :movqImmReg
/rax :callqReg
/rcx :popqReg # rcx == count of bytes to copy
/rsi :popqReg # rsi == start offset
/rdx :popqReg # rdx == source string
/rax :pushqReg
:cld
24 1 /rsi /rdx /rsi :leaqMemIndexScaleDisp8Reg
24 /rax /rdi :leaqMemDisp8Reg
:reprcx :movsb
/rbx :pushqReg
:retn
@negativeLengthInfix
/rdi /rdi :xorqRegReg
/negativeLengthInfixFixed :jmpLbl8
]] /eyinfix defv
# calculate a string prefix
# 0 -> string to shorten
# 1 -> first position after the prefix
[[
/rbx :popqReg
/rcx :popqReg # rcx == string
16 /rcx /rbp :movqMemDisp8Reg
/rdi :popqReg
/rdi ::unboxInteger
0 /rdi :cmpqImm8Reg
/positiveEndOffset :jgeLbl8
/rbp /rdi :addqRegReg
@positiveEndOffset
/rsi /rsi :xorqRegReg
# rdi == end offset
# rsi == start offset
/rcx :pushqReg
/rsi :pushqReg
/rsi /rdi :subqRegReg
/negativeLengthInfix :jsLbl8
@negativeLengthInfixFixed
/rdi :pushqReg
::internalAllocateString /rax :movqImmReg
/rax :callqReg
/rcx :popqReg # rcx == count of bytes to copy
/rsi :popqReg # rsi == start offset
/rdx :popqReg # rdx == source string
/rax :pushqReg
:cld
24 1 /rsi /rdx /rsi :leaqMemIndexScaleDisp8Reg
24 /rax /rdi :leaqMemDisp8Reg
:reprcx :movsb
/rbx :pushqReg
:retn
@negativeLengthInfix
/rdi /rdi :xorqRegReg
/negativeLengthInfixFixed :jmpLbl8
]] /eyprefix defv
# calculate a string postfix
# 0 -> string to shorten
# 1 -> position of string where to start the postfix
# 0 <- the requested postfix of the string
[[
/rbx :popqReg
/rcx :popqReg # rcx == string
16 /rcx /rbp :movqMemDisp8Reg
/rbp /rdi :movqRegReg
/rsi :popqReg
/rsi ::unboxInteger
0 /rsi :cmpqImm8Reg
/positiveStartOffset :jgeLbl8
/rbp /rsi :addqRegReg
@positiveStartOffset
# rdi == end offset
# rsi == start offset
/rcx :pushqReg
/rsi :pushqReg
/rsi /rdi :subqRegReg
/negativeLengthInfix :jsLbl8
@negativeLengthInfixFixed
/rdi :pushqReg
::internalAllocateString /rax :movqImmReg
/rax :callqReg
/rcx :popqReg # rcx == count of bytes to copy
/rsi :popqReg # rsi == start offset
/rdx :popqReg # rdx == source string
/rax :pushqReg
:cld
24 1 /rsi /rdx /rsi :leaqMemIndexScaleDisp8Reg
24 /rax /rdi :leaqMemDisp8Reg
:reprcx :movsb
/rbx :pushqReg
:retn
@negativeLengthInfix
/rdi /rdi :xorqRegReg
/negativeLengthInfixFixed :jmpLbl8
]] /eypostfix defv
# produce a string from an integer array specifying its bytes
# 0 -> array of integers
# 0 <- the same bytes as a string
[[
/rbx :popqReg
/rsi :popqReg
/rsi :pushqReg
/rsi /edi :movlMemReg # load array length
3 /rdi :shrqImm8Reg
/rdi :decqReg
/rdi :pushqReg
::internalAllocateString /rax :movqImmReg
/rax :callqReg
/rcx :popqReg # number of characters to copy
/rsi :popqReg
/rax :pushqReg # store target string on stack
/rcx /rcx :testqRegReg
/emptyArray :jzLbl8
8 /rsi :addqImm8Reg # move rsi to first array entry
24 /rax :addqImm8Reg # move rax to first string byte
@copyByte
/rsi /rdx :movqMemReg # load object pointer
/rdx ::unboxInteger
/dl /rax :movbRegMem
8 /rsi :addqImm8Reg
/rax :incqReg
/copyByte :loopLbl8
@emptyArray
/rbx :pushqReg
:retn
]] /eyfromArray defv
# split a string on a given character
# 0 -> single letter separator string
# 1 -> string to split
# 0 <- array of string fragments
# Examples:
# "" ";" str .split -> [ "" ]
# "foo;bar" ";" str .split -> [ "foo" "bar" ]
# "foo;bar;quux;" ";" str .split -> [ "foo" "bar" "quux" "" ]
[[
/rbx :popqReg
/rax :popqReg
1 16 /rax :cmpqImm8MemDisp8
/notSingleCharacter :jnzLbl32
24 /rax /rax :movqMemDisp8Reg # al == the separator char
/rdx :popqReg
16 /rdx /rcx :movqMemDisp8Reg
24 /rdx /rdi :leaqMemDisp8Reg
/rcx /rcx :testqRegReg
/nonEmptyInitialString :jnzLbl8
/rdi :pushqReg
/rdi :pushqReg
1 /rbp :movqImmReg
/finalCharacterNotSeparator :jmpLbl8
@nonEmptyInitialString
/rbp /rbp :xorqRegReg
/rdi :pushqReg # push (effect of) virtual separator before string data
@searchFragmentLoop
:repnz :scasb
/rdi :pushqReg
/rbp :incqReg
/rcx /rcx :testqRegReg
/searchFragmentLoop :jnzLbl8
/al 1 neg /rdi :cmpbRegMemDisp8
/finalCharacterNotSeparator :jnzLbl8
/rdi :incqReg
/rdi :pushqReg
/rbp :incqReg
/finalCharacterSeparator :jmpLbl8
@finalCharacterNotSeparator
1 0 /rsp :addqImm8MemDisp8
@finalCharacterSeparator
# the stack now holds rbp many pointers to fragment starts (from bottom to top)
24 /r15 :subqImm8Reg
/rbp 8 /r15 :movqRegMemDisp8
/rbp /rdi :movqRegReg
3 /rdi :shlqImm8Reg
::internalAllocateArray /rax :movqImmReg
/rax :callqReg
8 /r15 /rbp :movqMemDisp8Reg # rbp == count of fragments
/rax 16 /r15 :movqRegMemDisp8 # 16 /r15 == result array object
8 /rbp /rax /rdi :leaqMemIndexScaleReg # rdi == last array cell
/rdi /r15 :movqRegMem
# 0 /r15 == target array cell
# 8 /r15 == remaining fragments to generate
# 16 /r15 == result array object
@generateFragmentLoop
0 /rsp /rdi :movqMemDisp8Reg
8 /rsp /rdi :subqMemDisp8Reg
/rdi :decqReg
::internalAllocateString /rax :movqImmReg
/rax :callqReg
/r15 /rdi :movqMemReg
/rax /rdi :movqRegMem # new string object into array cell
8 /r15 :subqImm8Mem # move to array cell 8 bytes before
24 /rax /rdi :leaqMemDisp8Reg # new string object data section to rdi
8 /rsp /rsi :movqMemDisp8Reg # fragment data to rsi
0 /rsp /rcx :movqMemDisp8Reg
8 /rsp /rcx :subqMemDisp8Reg
/rcx :decqReg
:reprcx :movsb
8 /rsp :addqImm8Reg # drop fragment data
1 8 /r15 :subqImm8MemDisp8
/generateFragmentLoop :jnzLbl8
16 /r15 /rax :movqMemDisp8Reg
/rax 0 /rsp :movqRegMemDisp8 # replace last fragment data by array object
24 /r15 :addqImm8Reg
/rbx :pushqReg
:retn
@notSingleCharacter
"separator string not single character" ::outputError
:ud2
]] /eysplit defv
## Bitfield style functions
# reset a string to all-zero
# 0 -> string to reset
[[
/rbx :popqReg
/rdi :popqReg
/rax /rax :xorqRegReg
16 /rdi /rcx :movqMemDisp8Reg
24 /rdi :addqImm8Reg
/rcx :decqReg
3 /rcx :shrqImm8Reg
/rcx :incqReg
:reprcx :stosq
/rbx :pushqReg
:retn
]] /eyzero defv
# bit test
# 0 -> string to extract bit from
# 1 -> bit index to extract
[[
/rbx :popqReg
/rdi :popqReg
/rax :popqReg
/rax ::unboxInteger
/rcx /rcx :xorqRegReg
/rax 24 /rdi :btqRegMemDisp8
/cl :setcbReg
63 /rcx :btsqImm8Reg
/rcx :pushqReg
/rbx :pushqReg
:retn
]] /eybitTest defv
# bit set
# 0 -> string to set bit in
# 1 -> bit index to set
[[
/rbx :popqReg
/rdi :popqReg
/rax :popqReg
/rax ::unboxInteger
/rax 24 /rdi :btsqRegMemDisp8
/rbx :pushqReg
:retn
]] /eybitSet defv
# bit reset
# 0 -> string to reset bit in
# 1 -> bit index to reset
[[
/rbx :popqReg
/rdi :popqReg
/rax :popqReg
/rax ::unboxInteger
/rax 24 /rdi :btrqRegMemDisp8
/rbx :pushqReg
:retn
]] /eybitReset defv
> _ ==globalFunctions { defv }' ::allocateOffsetStruct
[
globalFunctions keys eydeff { | }' createScopeEntries
createScopeExtensionEntries
] :execute
leaveSubScope
> --
# vim: syn=elymas
|
