mirror of
https://github.com/cemu-project/Cemu.git
synced 2024-11-24 18:16:55 +01:00
238 lines
4.3 KiB
NASM
238 lines
4.3 KiB
NASM
DEFAULT REL
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SECTION .text
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global udiv128
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global recompiler_fres
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global recompiler_frsqrte
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udiv128:
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mov rax, rcx
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div r8
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mov [r9], rdx
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ret
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recompiler_fres:
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; store all modified registers
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push rdx
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push rcx
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push rax
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push r8
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lea r8,[asmFresLookupTable]
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movq rdx, xmm15
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mov rcx,rdx
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shr rcx,2Fh
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mov rax,rdx
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and ecx,1Fh
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shr rax,25h
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and eax,3FFh
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imul eax,dword [r8+rcx*8+4]
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mov r8d,dword [r8+rcx*8]
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mov rcx,rdx
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shr rcx,34h
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inc eax
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shr eax,1
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sub r8d,eax
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and ecx,7FFh
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jne fres_espresso_label3
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mov rax,7FF0000000000000h
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or rdx,rax
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movq xmm15, rdx
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pop r8
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pop rax
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pop rcx
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pop rdx
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ret
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fres_espresso_label3:
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cmp ecx,7FFh
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jne fres_espresso_label4
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mov rax,0FFFFFFFFFFFFFh
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test rax,rdx
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jne fres_espresso_label1
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test rdx,rdx
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jns fres_espresso_label2
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mov rax,8000000000000000h
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movq xmm15, rax
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pop r8
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pop rax
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pop rcx
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pop rdx
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ret
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fres_espresso_label2:
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xorps xmm15,xmm15
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pop r8
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pop rax
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pop rcx
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pop rdx
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ret
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fres_espresso_label4:
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mov eax,7FDh
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sub eax,ecx
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mov ecx,eax
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mov rax,8000000000000000h
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and rdx,rax
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shl rcx,34h
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mov eax,r8d
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or rcx,rdx
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shl rax,1Dh
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add rcx,rax
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movq xmm15, rcx
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fres_espresso_label1:
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pop r8
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pop rax
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pop rcx
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pop rdx
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ret
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asmFresLookupTable:
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DD 07ff800h, 03e1h
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DD 0783800h, 03a7h
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DD 070ea00h, 0371h
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DD 06a0800h, 0340h
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DD 0638800h, 0313h
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DD 05d6200h, 02eah
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DD 0579000h, 02c4h
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DD 0520800h, 02a0h
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DD 04cc800h, 027fh
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DD 047ca00h, 0261h
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DD 0430800h, 0245h
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DD 03e8000h, 022ah
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DD 03a2c00h, 0212h
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DD 0360800h, 01fbh
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DD 0321400h, 01e5h
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DD 02e4a00h, 01d1h
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DD 02aa800h, 01beh
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DD 0272c00h, 01ach
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DD 023d600h, 019bh
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DD 0209e00h, 018bh
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DD 01d8800h, 017ch
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DD 01a9000h, 016eh
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DD 017ae00h, 015bh
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DD 014f800h, 015bh
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DD 0124400h, 0143h
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DD 0fbe00h, 0143h
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DD 0d3800h, 012dh
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DD 0ade00h, 012dh
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DD 088400h, 011ah
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DD 065000h, 011ah
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DD 041c00h, 0108h
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DD 020c00h, 0106h
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recompiler_frsqrte:
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; store all modified registers
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push rdx
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push rcx
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push rax
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push r8
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push r9
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movq r8, xmm15
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mov rax,7FFFFFFFFFFFFFFFh
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test rax,r8
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jne frsqrte_espresso_label1
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mov rax,0FFF0000000000000h
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and r8,rax
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mov rax,7FF0000000000000h
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or r8,rax
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movq xmm15, r8
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pop r9
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pop r8
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pop rax
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pop rcx
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pop rdx
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ret
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frsqrte_espresso_label1:
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mov r9,r8
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shr r9,34h
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and r9d,7FFh
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cmp r9d,7FFh
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jne frsqrte_espresso_label2
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mov rax,0FFFFFFFFFFFFFh
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test rax,r8
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jne frsqrte_espresso_label3
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test r8,r8
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js frsqrte_espresso_label4
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xorps xmm15,xmm15
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pop r9
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pop r8
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pop rax
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pop rcx
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pop rdx
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ret
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frsqrte_espresso_label2:
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test r8,r8
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jns frsqrte_espresso_label5
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frsqrte_espresso_label4:
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mov rax,7FF8000000000000h
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movq xmm15, rax
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pop r9
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pop r8
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pop rax
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pop rcx
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pop rdx
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ret
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frsqrte_espresso_label5:
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lea rdx,[asmFrsqrteLookupTable]
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mov rax,r8
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shr rax,30h
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mov rcx,r8
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shr rcx,25h
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and eax,1Fh
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and ecx,7FFh
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imul ecx,dword [rdx+rax*8+4]
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mov eax,dword [rdx+rax*8]
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sub eax,ecx
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lea ecx,[r9-3FDh]
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shr ecx,1
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movsxd rdx,eax
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mov eax,3FFh
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sub eax,ecx
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shl rdx,1Ah
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mov ecx,eax
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mov rax,8000000000000000h
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and r8,rax
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shl rcx,34h
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or rcx,r8
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add rdx,rcx
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movq xmm15, rdx
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frsqrte_espresso_label3:
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pop r9
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pop r8
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pop rax
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pop rcx
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pop rdx
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ret
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asmFrsqrteLookupTable:
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DD 01a7e800h, 0568h
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DD 017cb800h, 04f3h
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DD 01552800h, 048dh
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DD 0130c000h, 0435h
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DD 010f2000h, 03e7h
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DD 0eff000h, 03a2h
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DD 0d2e000h, 0365h
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DD 0b7c000h, 032eh
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DD 09e5000h, 02fch
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DD 0867000h, 02d0h
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DD 06ff000h, 02a8h
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DD 05ab800h, 0283h
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DD 046a000h, 0261h
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DD 0339800h, 0243h
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DD 0218800h, 0226h
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DD 0105800h, 020bh
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DD 03ffa000h, 07a4h
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DD 03c29000h, 0700h
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DD 038aa000h, 0670h
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DD 03572000h, 05f2h
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DD 03279000h, 0584h
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DD 02fb7000h, 0524h
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DD 02d26000h, 04cch
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DD 02ac0000h, 047eh
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DD 02881000h, 043ah
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DD 02665000h, 03fah
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DD 02468000h, 03c2h
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DD 02287000h, 038eh
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DD 020c1000h, 035eh
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DD 01f12000h, 0332h
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DD 01d79000h, 030ah
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DD 01bf4000h, 02e6h
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