6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2024-07-04 18:29:40 +00:00
Code Issues Projects Releases Wiki Activity

Unify TST.

Browse Source
This commit is contained in:
Thomas Harte 2022-10-11 21:31:14 -04:00
parent eff9a09b9f
commit 06dbb7167b
1 changed files with 9 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
InstructionSets/M68k/Implementation/PerformImplementation.hpp
View File

@ -234,6 +234,12 @@ template <bool is_extend, typename IntT> void negative(IntT &source, Status &sta
source = result;
}
template <typename IntT> void test(IntT source, Status &status) {
status.carry_flag = status.overflow_flag = 0;
status.zero_result = Status::FlagT(source);
status.negative_flag = status.zero_result & top_bit<IntT>();
}
}
template <
@ -970,23 +976,9 @@ template <
TSTs: compare to zero.
*/
case Operation::TSTb:
status.carry_flag = status.overflow_flag = 0;
status.zero_result = src.b;
status.negative_flag = status.zero_result & 0x80;
break;
case Operation::TSTw:
status.carry_flag = status.overflow_flag = 0;
status.zero_result = src.w;
status.negative_flag = status.zero_result & 0x8000;
break;
case Operation::TSTl:
status.carry_flag = status.overflow_flag = 0;
status.zero_result = src.l;
status.negative_flag = status.zero_result & 0x80000000;
break;
case Operation::TSTb: Primitive::test(src.b, status); break;
case Operation::TSTw: Primitive::test(src.w, status); break;
case Operation::TSTl: Primitive::test(src.l, status); break;
case Operation::STOP:
status.set_status(src.w);