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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 03:01:46 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 03:01:46 +0000 |
commit | f8fe689a81f906d1b91bb3220acde2a4ecb14c5b (patch) | |
tree | 26484e9d7e2c67806c2d1760196ff01aaa858e8c /src/VBox/Runtime/common/math/floor.asm | |
parent | Initial commit. (diff) | |
download | virtualbox-f8fe689a81f906d1b91bb3220acde2a4ecb14c5b.tar.xz virtualbox-f8fe689a81f906d1b91bb3220acde2a4ecb14c5b.zip |
Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/Runtime/common/math/floor.asm')
-rw-r--r-- | src/VBox/Runtime/common/math/floor.asm | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/math/floor.asm b/src/VBox/Runtime/common/math/floor.asm new file mode 100644 index 00000000..9463729a --- /dev/null +++ b/src/VBox/Runtime/common/math/floor.asm @@ -0,0 +1,68 @@ +; $Id: floor.asm $ +;; @file +; IPRT - No-CRT floor - AMD64 & X86. +; + +; +; Copyright (C) 2006-2019 Oracle Corporation +; +; This file is part of VirtualBox Open Source Edition (OSE), as +; available from http://www.virtualbox.org. This file is free software; +; you can redistribute it and/or modify it under the terms of the GNU +; General Public License (GPL) as published by the Free Software +; Foundation, in version 2 as it comes in the "COPYING" file of the +; VirtualBox OSE distribution. VirtualBox OSE is distributed in the +; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. +; +; The contents of this file may alternatively be used under the terms +; of the Common Development and Distribution License Version 1.0 +; (CDDL) only, as it comes in the "COPYING.CDDL" file of the +; VirtualBox OSE distribution, in which case the provisions of the +; CDDL are applicable instead of those of the GPL. +; +; You may elect to license modified versions of this file under the +; terms and conditions of either the GPL or the CDDL or both. +; + +%include "iprt/asmdefs.mac" + +BEGINCODE + +;; +; Compute the largest integral value not greater than rd. +; @returns 32-bit: st(0) 64-bit: xmm0 +; @param rd 32-bit: [ebp + 8] 64-bit: xmm0 +BEGINPROC RT_NOCRT(floor) + push xBP + mov xBP, xSP + sub xSP, 10h + +%ifdef RT_ARCH_AMD64 + movsd [xSP], xmm0 + fld qword [xSP] +%else + fld qword [xBP + xCB*2] +%endif + + ; Make it round down by modifying the fpu control word. + fstcw [xBP - 10h] + mov eax, [xBP - 10h] + or eax, 00400h + and eax, 0f7ffh + mov [xBP - 08h], eax + fldcw [xBP - 08h] + + ; Round ST(0) to integer. + frndint + + ; Restore the fpu control word. + fldcw [xBP - 10h] + +%ifdef RT_ARCH_AMD64 + fstp qword [xSP] + movsd xmm0, [xSP] +%endif + leave + ret +ENDPROC RT_NOCRT(floor) + |