From f215e02bf85f68d3a6106c2a1f4f7f063f819064 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Thu, 11 Apr 2024 10:17:27 +0200
Subject: Adding upstream version 7.0.14-dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/VBox/Runtime/common/math/log.asm | 97 ++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 src/VBox/Runtime/common/math/log.asm

(limited to 'src/VBox/Runtime/common/math/log.asm')

diff --git a/src/VBox/Runtime/common/math/log.asm b/src/VBox/Runtime/common/math/log.asm
new file mode 100644
index 00000000..b94f3ba6
--- /dev/null
+++ b/src/VBox/Runtime/common/math/log.asm
@@ -0,0 +1,97 @@
+; $Id: log.asm $
+;; @file
+; IPRT - No-CRT log - AMD64 & X86.
+;
+
+;
+; Copyright (C) 2006-2023 Oracle and/or its affiliates.
+;
+; This file is part of VirtualBox base platform packages, as
+; available from https://www.virtualbox.org.
+;
+; This program is free software; you can redistribute it and/or
+; modify it under the terms of the GNU General Public License
+; as published by the Free Software Foundation, in version 3 of the
+; License.
+;
+; This program is distributed in the hope that it will be useful, but
+; WITHOUT ANY WARRANTY; without even the implied warranty of
+; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+; General Public License for more details.
+;
+; You should have received a copy of the GNU General Public License
+; along with this program; if not, see <https://www.gnu.org/licenses>.
+;
+; The contents of this file may alternatively be used under the terms
+; of the Common Development and Distribution License Version 1.0
+; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+; in the VirtualBox 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.
+;
+; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+;
+
+
+%define RT_ASM_WITH_SEH64
+%include "iprt/asmdefs.mac"
+%include "iprt/x86.mac"
+
+
+BEGINCODE
+
+;;
+; compute the natural logarithm of rd
+; @returns st(0) / xmm0
+; @param    rd      [rbp + xCB*2] / xmm0
+RT_NOCRT_BEGINPROC log
+        push    xBP
+        SEH64_PUSH_xBP
+        mov     xBP, xSP
+        SEH64_SET_FRAME_xBP 0
+%ifdef RT_ARCH_AMD64
+        sub     xSP, 10h
+        SEH64_ALLOCATE_STACK 10h
+%endif
+        SEH64_END_PROLOGUE
+
+        fldln2                              ; st0=log(2)
+%ifdef RT_ARCH_AMD64
+        movsd   [xBP - 10h], xmm0
+        fld     qword [xBP - 10h]
+%else
+        fld     qword [xBP + xCB*2]         ; st1=log(2) st0=lrd
+%endif
+        fld     st0                         ; st1=log(2) st0=lrd st0=lrd
+        fsub    qword [.one xWrtRIP]        ; st2=log(2) st1=lrd st0=lrd-1.0
+        fld     st0                         ; st3=log(2) st2=lrd st1=lrd-1.0 st0=lrd-1.0
+
+        fabs                                ; st3=log(2) st2=lrd st1=lrd-1.0 st0=abs(lrd-1.0)
+        fcomp   qword [.limit xWrtRIP]      ; st2=log(2) st1=lrd st0=lrd-1.0
+        fnstsw  ax
+        and     eax, X86_FSW_C3 | X86_FSW_C2 | X86_FSW_C0
+        jnz    .use_st1
+
+        fstp    st0                         ; st1=log(2) st0=lrd
+        fyl2x                               ; log(lrd)
+        jmp     .done
+
+.use_st1:
+        fstp    st1                         ; st1=log(2) st0=lrd-1.0
+        fyl2xp1                             ; log(lrd)
+
+.done:
+%ifdef RT_ARCH_AMD64
+        fstp    qword [xBP - 10h]
+        movsd   xmm0, [xBP - 10h]
+%endif
+        leave
+        ret
+
+ALIGNCODE(8)
+.one:   dq  1.0
+.limit: dq  0.29
+ENDPROC   RT_NOCRT(log)
+
-- 
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