mirror of
https://github.com/FEX-Emu/FEX.git
synced 2026-10-25 11:00:46 +01:00
Ryan Houdek
2e93d10eba
Turns out this was calculating OF incorrectly, breaking Denuvo early in its execution. Changes the ROL imm OF calculation code as well to be more consistent and not keep src1 alive longer than it needs to be. Also adds two new unit tests to ensure this stays correct.
73 lines
740 B
NASM
73 lines
740 B
NASM
%ifdef CONFIG
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{
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"RegData": {
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"R15": "0x00000000000000cc"
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}
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}
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%endif
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%macro clearof 0
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mov r12, 0
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ror r12, 1
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%endmacro
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%macro ofmerge 0
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mov r14, 0
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mov r13, 1
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cmovo r14, r13
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or r15, r14
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shl r15, 1
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%endmacro
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mov r15, 0
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mov r14, 1
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; 1 bit rotate
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; ror OF = XOR or two most significant bits of result
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clearof
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mov rax, 0
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mov rcx, 1
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ror rax, cl
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ofmerge
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clearof
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mov rax, 1
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mov rcx, 1
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ror rax, cl
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ofmerge
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clearof
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mov rax, 0x8000000000000000
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mov rcx, 1
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ror rax, cl
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ofmerge
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clearof
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mov rax, 0x8000000000000001
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mov rcx, 1
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ror rax, cl
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ofmerge
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clearof
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mov rax, 0
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ror rax, 1
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ofmerge
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clearof
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mov rax, 1
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ror rax, 1
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ofmerge
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clearof
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mov rax, 0x8000000000000000
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ror rax, 1
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ofmerge
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clearof
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mov rax, 0x8000000000000001
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ror rax, 1
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ofmerge
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hlt
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