62 lines
1.5 KiB
NASM
62 lines
1.5 KiB
NASM
;
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; Library/Uefi/IA32/ftol.asm
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;
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; UEFI implementation IA32 floating point to integer conversion intrinsics
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;
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.386
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_TEXT segment use32 para public 'CODE'
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; Export these symbols from this source
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public __ftol
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public __ftol2
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public __ftol2_sse
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; __ftol
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; Convert floating point to integer
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; @param Float The floating point to convert to integer
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; @return The integer converted from the floating point
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__ftol proc
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assume cs:_TEXT
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fnstcw word ptr [esp - 2]
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mov ax, word ptr [esp - 2]
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or ax, 0C00h
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mov word ptr [esp - 4], ax
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fldcw word ptr [esp - 4]
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fistp qword ptr [esp - 12]
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fldcw word ptr [esp - 2]
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mov eax, dword ptr [esp - 12]
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mov edx, dword ptr [esp - 8]
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ret
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__ftol endp
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; __ftol2_sse
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; Convert floating point to integer
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; @param Float The floating point to convert to integer
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; @return The integer converted from the floating point
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__ftol2_sse:
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; __ftol2
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; Convert floating point to integer
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; @param Float The floating point to convert to integer
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; @return The integer converted from the floating point
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__ftol2 proc
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assume cs:_TEXT
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fnstcw word ptr [esp - 2]
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mov ax, word ptr [esp - 2]
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or ax, 0C00h
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mov word ptr [esp - 4], ax
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fldcw word ptr [esp - 4]
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fistp qword ptr [esp - 12]
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fldcw word ptr [esp - 2]
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mov eax, dword ptr [esp - 12]
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mov edx, dword ptr [esp - 8]
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ret
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__ftol2 endp
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_TEXT ends
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end
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