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move a function out of the builder to tools for clarity

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This commit is contained in:
Torsten Ruger 2014-04-23 14:02:58 +03:00
parent ced82628d4
commit b2f45d9f9c
2 changed files with 23 additions and 22 deletions
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23
lib/asm/instruction_tools.rb
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@ -55,4 +55,27 @@ module Asm
ref
end
end
def calculate_u8_with_rr(arg)
parts = arg.value.to_s(2).rjust(32,'0').scan(/^(0*)(.+?)0*$/).flatten
pre_zeros = parts[0].length
imm_len = parts[1].length
if ((pre_zeros+imm_len) % 2 == 1)
u8_imm = (parts[1]+'0').to_i(2)
imm_len += 1
else
u8_imm = parts[1].to_i(2)
end
if (u8_imm.fits_u8?)
# can do!
rot_imm = (pre_zeros+imm_len) / 2
if (rot_imm > 15)
return nil
end
return u8_imm | (rot_imm << 8)
else
return nil
end
end
end

22
lib/asm/normal_builder.rb
View File

@ -19,28 +19,6 @@ module Asm
attr_accessor :cond, :inst_class, :i, :opcode, :s,
:rn, :rd, :operand
def calculate_u8_with_rr(arg)
parts = arg.value.to_s(2).rjust(32,'0').scan(/^(0*)(.+?)0*$/).flatten
pre_zeros = parts[0].length
imm_len = parts[1].length
if ((pre_zeros+imm_len) % 2 == 1)
u8_imm = (parts[1]+'0').to_i(2)
imm_len += 1
else
u8_imm = parts[1].to_i(2)
end
if (u8_imm.fits_u8?)
# can do!
rot_imm = (pre_zeros+imm_len) / 2
if (rot_imm > 15)
return nil
end
return u8_imm | (rot_imm << 8)
else
return nil
end
end
# Build representation for source value
def build_operand(arg , position = 0)
#position only needed for calculating relative addresses to data objects