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https://github.com/FEX-Emu/FEX.git
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101 lines
1.3 KiB
NASM
101 lines
1.3 KiB
NASM
%ifdef CONFIG
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{
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"RegData": {
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"R15": "0x0000000000003fff"
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}
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}
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%endif
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%macro cfmerge 0
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; Get CF
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lahf
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shr rax, 8
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and rax, 1
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; Merge in to results
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shl r15, 1
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or r15, rax
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%endmacro
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; FEX had a bug where imul flag calculation was incorrect.
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; CF and OF are set due to overflow.
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mov r15, 0
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mov rax, 0
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; Multiply starting value
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mov ebx, 0x6D
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; imul 1-src
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mov ebx, 0xaaaaaaab
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mov ecx, 0x6D
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imul cx, bx
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cfmerge
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mov ebx, 0xaaaaaaab
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mov ecx, 0x6D
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imul ecx, ebx
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cfmerge
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mov rbx, 0xaaaaaaaa_aaaaaaab
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mov rcx, 0x6D
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imul rcx, rbx
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cfmerge
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; imul 2-src 8-bit check
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mov ebx, 0xaaaaaaab
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imul cx, bx, 0x6D
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cfmerge
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mov ebx, 0xaaaaaaab
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imul ecx, ebx, 0x6D
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cfmerge
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mov rbx, 0xaaaaaaaa_aaaaaaab
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imul ecx, ebx, 0x6D
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cfmerge
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; imul 2-src 16-bit, 32-bit, 64-bit check
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mov rbx, 0xaaaaaaaa_aaaaaaab
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imul cx, bx, 0x600D
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cfmerge
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mov rbx, 0xaaaaaaaa_aaaaaaab
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imul ecx, ebx, 0x600D0000
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cfmerge
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mov rbx, 0xaaaaaaaa_aaaaaaab
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imul rcx, rbx, 0x600D0000
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cfmerge
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mov rbx, 0x0aaaaaaa_aaaaaaab
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imul rcx, rbx, -0x600D0000
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cfmerge
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; IMUL implicit dest
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mov rax, 0x0aaaaaaa_aaaaaaab
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mov ecx, 0x6D
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imul cl
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cfmerge
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mov rax, 0x0aaaaaaa_aaaaaaab
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mov ecx, 0x600D
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imul cx
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cfmerge
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mov rax, 0x0aaaaaaa_aaaaaaab
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mov ecx, 0x600D0000
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imul ecx
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cfmerge
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mov rax, 0x0aaaaaaa_aaaaaaab
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mov rcx, 0x600D0000_00000000
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imul rcx
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cfmerge
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hlt
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