diff options
| author | Drahflow <drahflow@gmx.de> | 2016-07-04 13:12:14 +0200 |
|---|---|---|
| committer | Drahflow <drahflow@gmx.de> | 2016-07-04 13:12:14 +0200 |
| commit | 81e50ce4e727299219da7491ab3f0db41b6857d4 (patch) | |
| tree | b6bc693200a5d3eac89434b573cbcfea7c1c3ece /elymas/lib/sys | |
| parent | 73198ac27fa2b08e6b16eace3a75bc56a068206c (diff) | |
sys .asmroutines .assemblestr
Diffstat (limited to 'elymas/lib/sys')
| -rw-r--r-- | elymas/lib/sys/asmroutines.ey | 58 |
1 files changed, 57 insertions, 1 deletions
diff --git a/elymas/lib/sys/asmroutines.ey b/elymas/lib/sys/asmroutines.ey index 3be080d..d0df72e 100644 --- a/elymas/lib/sys/asmroutines.ey +++ b/elymas/lib/sys/asmroutines.ey @@ -13,7 +13,7 @@ # concatenate an array full of strings into one, i.e. { |cat fold }" # 0 -> array of strings - # 0 <- string obtained by concatenating all string from the array + # 0 <- string obtained by concatenating all strings from the array [[ /rbx :popqReg @@ -55,6 +55,62 @@ /rbx :pushqReg :retn ]] [ ] ::createFunction /catstrarray deffd + + # concatenate strings from topmost array marker to top of stack + # into one, i.e. { ] |cat fold }" + # n -> array start marker + # 0... -> strings on the stack + # 0 <- string obtained by concatenating all strings + [[ + /rbx :popqReg + + /rsp /rdx :movqRegReg + + # sum individual lengths + /rdi /rdi :xorqRegReg + /rdx /rsi :movqMemReg + 1 /rsi :cmpqImm8Reg + /nothingToCount :jzLbl8 + + @countLoop + 16 /rsi /rdi :addqMemDisp8Reg + 8 /rdx :addqImm8Reg + /rdx /rsi :movqMemReg + 1 /rsi :cmpqImm8Reg + /countLoop :jnzLbl8 + + @nothingToCount + # rdi == total number of characters + # rdx == pointer to array start marker + /rdx :pushqReg + + ::internalAllocateString /rax :movqImmReg + /rax :callqReg + # rax == target string of correct length + + /rdx :popqReg + /rdx /rbp :movqRegReg # rbp == pointer to array start marker + 24 /rax /rdi :leaqMemDisp8Reg + + /rdx /rsp :cmpqRegReg + /nothingToCopy :jzLbl8 + + @copyLoop + 8 /rdx :subqImm8Reg + /rdx /rsi :movqMemReg + 16 /rsi /rcx :movqMemDisp8Reg + 24 /rsi :addqImm8Reg + :reprcx :movsb + /rdx /rsp :cmpqRegReg + /copyLoop :jnzLbl8 + + @nothingToCopy + /rax 0 /rbp :movqRegMemDisp8 # save new string + /rbp /rsp :movqRegReg # drop string fragments from stack + + /rbx :pushqReg + :retn + ]] [ ] ::createFunction /assemblestr deffd > /asmroutines sys .defv # vim: syn=elymas |