mirror of
https://github.com/FEX-Emu/FEX.git
synced 2026-10-28 02:01:52 +01:00
Ryan Houdek
bad5cef52b
FEX-Emu currently doesn't do large rotates for small data sources correctly. This will fail CI until fixed in OpcodeDispatcher
116 lines
2.5 KiB
NASM
116 lines
2.5 KiB
NASM
%ifdef CONFIG
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{
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"RegData": {
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"RAX": "0x4142434445464748",
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"RBX": "0x4142434445464748",
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"RCX": "0x4142434445464748",
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"RDX": "0x4142434445464748",
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"RSI": "0x4142434445464714",
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"RDI": "0x414243444546478a",
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"RBP": "0x4142434445464704",
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"RSP": "0x414243444546478a",
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"R8": "0x4142434445461d22",
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"R9": "0x41424344454651d2",
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"R10": "0x4142434445461d20",
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"R11": "0x41424344454651d2",
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"R12": "0x4142434445463a45",
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"R13": "0x41424344454608e9",
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"R14": "0x4142434445463a41",
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"R15": "0x41424344454608e9"
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}
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}
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%endif
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; FEX-Emu had a bug where 8-bit and 16-bit rotates with carry generated incorrect results when the rotate amount was larger than the data size.
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; This is well defined in x86 semantics.
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mov cl, 0x9
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stc
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jmp .test
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.test:
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; 8-bit: Test 1-bit past data size, plus carry
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rcr byte [rel .data + (0 * 8)], cl
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rcl byte [rel .data + (1 * 8)], cl
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mov cl, 0x9
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clc
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jmp .test2
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.test2:
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; 8-bit: Test 1-bit past data size, no carry
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rcr byte [rel .data + (2 * 8)], cl
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rcl byte [rel .data + (3 * 8)], cl
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mov cl, 0x1f
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stc
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jmp .test3
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.test3:
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; 8-bit: Test maximum 32-bit rotate, plus carry
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rcr byte [rel .data + (4 * 8)], cl
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rcl byte [rel .data + (5 * 8)], cl
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mov cl, 0x1f
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clc
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jmp .test4
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.test4:
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; 8-bit: Test maximum 32-bit rotate, plus carry
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rcr byte [rel .data + (6 * 8)], cl
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rcl byte [rel .data + (7 * 8)], cl
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mov cl, 0xF
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stc
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jmp .test5
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.test5:
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; 16-bit: Test 1-bit past data size, plus carry
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rcr word [rel .data + (8 * 8)], cl
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rcl word [rel .data + (9 * 8)], cl
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mov cl, 0xF
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clc
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jmp .test6
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.test6:
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; 16-bit: Test 1-bit past data size, no carry
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rcr word [rel .data + (10 * 8)], cl
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rcl word [rel .data + (11 * 8)], cl
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mov cl, 0x1f
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stc
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jmp .test7
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.test7:
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; 16-bit: Test maximum 32-bit rotate, plus carry
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rcr word [rel .data + (12 * 8)], cl
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rcl word [rel .data + (13 * 8)], cl
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mov cl, 0x1f
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clc
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jmp .test8
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.test8:
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; 16-bit: Test maximum 32-bit rotate, plus carry
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rcr word [rel .data + (14 * 8)], cl
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rcl word [rel .data + (15 * 8)], cl
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jmp .end
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.end:
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; Load all the results in order
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mov rax, [rel .data + (0 * 8)]
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mov rbx, [rel .data + (1 * 8)]
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mov rcx, [rel .data + (2 * 8)]
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mov rdx, [rel .data + (3 * 8)]
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mov rsi, [rel .data + (4 * 8)]
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mov rdi, [rel .data + (5 * 8)]
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mov rbp, [rel .data + (6 * 8)]
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mov rsp, [rel .data + (7 * 8)]
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mov r8, [rel .data + (8 * 8)]
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mov r9, [rel .data + (9 * 8)]
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mov r10, [rel .data + (10 * 8)]
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mov r11, [rel .data + (11 * 8)]
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mov r12, [rel .data + (12 * 8)]
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mov r13, [rel .data + (13 * 8)]
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mov r14, [rel .data + (14 * 8)]
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mov r15, [rel .data + (15 * 8)]
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hlt
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.data:
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times 16 dq 0x4142434445464748
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