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41 lines
975 B
ArmAsm
41 lines
975 B
ArmAsm
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/*
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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/ceilf.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 <reactos/asm.h>
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#include <ndk/amd64/asm.h>
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/* FUNCTIONS ****************************************************************/
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.code64
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PUBLIC ceilf
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ceilf:
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/* Put parameter on the stack */
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movss [rsp - 0x10], xmm0
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fld dword ptr [rsp]
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/* Change fpu control word to round up */
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fstcw [rsp - 0x10]
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mov eax, [rsp - 0x10]
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or eax, 0x00800
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and eax, 0x0fbff
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mov [rsp - 0x08], eax
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fldcw [rsp - 0x08]
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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 - 0x10]
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fstp dword ptr [rsp - 0x10]
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movss xmm0, [rsp - 0x10]
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ret
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