Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 65 insertions, 0 deletions

diff --git a/src/VBox/Runtime/common/math/logl.asm b/src/VBox/Runtime/common/math/logl.asm
new file mode 100644
index 00000000..71dd91e6
--- /dev/null
+++ b/src/VBox/Runtime/common/math/logl.asm
@@ -0,0 +1,65 @@
+; $Id: logl.asm $
+;; @file
+; IPRT - No-CRT logl - 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 natural logarithm of lrd
+; @returns st(0)
+; @param    lrd     [rbp + xCB*2]
+BEGINPROC RT_NOCRT(logl)
+    push    xBP
+    mov     xBP, xSP
+    sub     xSP, 10h
+
+    fldln2                              ; st0=log(2)
+    fld     tword [xBP + xCB*2]         ; st1=log(2) st0=lrd
+    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, 04500h
+    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:
+    leave
+    ret
+.one:   dq  1.0
+.limit: dq  0.29
+ENDPROC   RT_NOCRT(logl)
+