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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 16:49:04 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 16:49:04 +0000
commit16f504a9dca3fe3b70568f67b7d41241ae485288 (patch)
treec60f36ada0496ba928b7161059ba5ab1ab224f9d /src/VBox/Runtime/common/math/feupdateenv.asm
parentInitial commit. (diff)
downloadvirtualbox-upstream.tar.xz
virtualbox-upstream.zip
Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/Runtime/common/math/feupdateenv.asm')
-rw-r--r--src/VBox/Runtime/common/math/feupdateenv.asm128
1 files changed, 128 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/math/feupdateenv.asm b/src/VBox/Runtime/common/math/feupdateenv.asm
new file mode 100644
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+++ b/src/VBox/Runtime/common/math/feupdateenv.asm
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+; $Id: feupdateenv.asm $
+;; @file
+; IPRT - No-CRT feupdateenv - AMD64 & X86.
+;
+
+;
+; Copyright (C) 2022 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
+extern NAME(RT_NOCRT(fesetenv))
+extern NAME(RT_NOCRT(feraiseexcept))
+
+
+;;
+; Updates the FPU+SSE environment.
+;
+; This will restore @a pEnv and merge in pending exception flags.
+;
+; @returns eax = 0 on success, -1 on failure.
+; @param pEnv 32-bit: [xBP+8] msc64: rcx gcc64: rdi - Saved environment.
+;
+RT_NOCRT_BEGINPROC feupdateenv
+ push xBP
+ SEH64_PUSH_xBP
+ mov xBP, xSP
+ SEH64_SET_FRAME_xBP 0
+ sub xSP, 30h
+ SEH64_ALLOCATE_STACK 30h
+ SEH64_END_PROLOGUE
+
+ ;
+ ; Load the parameter into rcx.
+ ;
+%ifdef ASM_CALL64_GCC
+ mov rcx, rdi
+%elifdef RT_ARCH_X86
+ mov ecx, [xBP + xCB*2]
+%endif
+
+ ;
+ ; Save the pending exceptions.
+ ;
+%ifdef RT_ARCH_X86
+ extern NAME(rtNoCrtHasSse)
+ call NAME(rtNoCrtHasSse) ; Preserves all except xAX.
+ xor edx, edx
+ test al, al
+ jz .no_sse
+%endif
+ stmxcsr [xBP - 10h]
+ mov edx, [xBP - 10h]
+ and edx, X86_MXCSR_XCPT_FLAGS
+.no_sse:
+ fnstsw ax
+ or edx, eax
+ mov [xBP - 8h], edx ; save the pending exceptions here (will apply X86_FSW_XCPT_MASK later).
+
+ ;
+ ; Call fesetenv to update the environment.
+ ; Note! We have not yet modified the parameter registers for calling
+ ; convensions using them. So, parameters only needs to be loaded
+ ; for the stacked based convention.
+ ;
+%ifdef RT_ARCH_X86
+ mov [xSP], ecx
+%endif
+ call NAME(RT_NOCRT(fesetenv))
+
+ ;
+ ; Raise exceptions if any are pending.
+ ;
+%ifdef ASM_CALL64_GCC
+ mov edi, [xBP - 8h]
+ and edi, X86_FSW_XCPT_MASK
+%elifdef ASM_CALL64_MSC
+ mov ecx, [xBP - 8h]
+ and ecx, X86_FSW_XCPT_MASK
+%else
+ mov ecx, [xBP - 8h]
+ and ecx, X86_FSW_XCPT_MASK
+ mov [xSP], ecx
+%endif
+ jz .no_exceptions_to_raise
+ call NAME(RT_NOCRT(feraiseexcept))
+.no_exceptions_to_raise:
+
+ ;
+ ; Return success.
+ ;
+ xor eax, eax
+ leave
+ ret
+ENDPROC RT_NOCRT(feupdateenv)
+