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Add carry flag "threading"
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Dominic Grimm 2022-07-09 21:08:27 +02:00
parent 54bd10f913
commit db5aeb333c
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1 changed files with 2 additions and 2 deletions
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src/hence/emulator.cr
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@ -184,13 +184,13 @@ module Hence
when 0x08 # shr when 0x08 # shr
@reg_tmp = @reg_a >> @reg_b @reg_tmp = @reg_a >> @reg_b
when 0x09 # add when 0x09 # add
@reg_tmp = @reg_a &+ @reg_b @reg_tmp = @reg_a &+ @reg_b &+ (@reg_s & 0b00000001_u8)
@reg_s &= 0b11111110_u8 @reg_s &= 0b11111110_u8
if @reg_tmp < @reg_a if @reg_tmp < @reg_a
@reg_s |= 0b00000001_u8 @reg_s |= 0b00000001_u8
end end
when 0x0a # sub when 0x0a # sub
@reg_tmp = @reg_a &- @reg_b @reg_tmp = @reg_a &- @reg_b &- (@reg_s & 0b00000001_u8)
@reg_s &= 0b11111110_u8 @reg_s &= 0b11111110_u8
if @reg_tmp > @reg_a if @reg_tmp > @reg_a
@reg_s |= 0b00000001_u8 @reg_s |= 0b00000001_u8