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46 lines
1,022 B
ArmAsm
46 lines
1,022 B
ArmAsm
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS system libraries
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* PURPOSE: Implementation of tan
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* FILE: lib/sdk/crt/math/amd64/floorf.S
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* PROGRAMMER: Timo Kreuzer (timo.kreuzer@reactos.org)
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*/
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/* INCLUDES ******************************************************************/
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#include <asm.inc>
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#include <ksamd64.inc>
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/* CODE **********************************************************************/
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.code64
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PUBLIC floorf
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FUNC floorf
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sub rsp, 16
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.ENDPROLOG
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/* Put parameter on the stack */
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movss dword ptr [rsp], xmm0
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fld dword ptr [rsp]
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/* Change fpu control word to round down */
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fstcw [rsp]
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mov eax, [rsp]
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or eax, HEX(000400)
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and eax, HEX(00f7ff)
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mov [rsp + 8], eax
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fldcw [rsp + 8]
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/* Round to integer */
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frndint
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/* Restore fpu control word */
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fldcw [rsp]
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fstp dword ptr [rsp]
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movss xmm0, dword ptr [rsp]
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add rsp, 16
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ret
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ENDFUNC floorf
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END
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