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Diffstat (limited to 'src/VBox/Runtime/common/math/feholdexcept.asm')
| -rw-r--r-- | src/VBox/Runtime/common/math/feholdexcept.asm | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/math/feholdexcept.asm b/src/VBox/Runtime/common/math/feholdexcept.asm new file mode 100644 index 00000000..106751b8 --- /dev/null +++ b/src/VBox/Runtime/common/math/feholdexcept.asm @@ -0,0 +1,99 @@ +; $Id: feholdexcept.asm $ +;; @file +; IPRT - No-CRT feholdexcept - AMD64 & X86. +; + +; +; Copyright (C) 2022-2023 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 + +;; +; Gets the FPU+SSE environment and disables (masks) all exceptions. +; +; @returns eax = 0 on success (-1 on failure) +; @param pEnv 32-bit: [xBP+8] msc64: rcx gcc64: rdi +; +RT_NOCRT_BEGINPROC feholdexcept + push xBP + SEH64_PUSH_xBP + mov xBP, xSP + SEH64_SET_FRAME_xBP 0 + 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 FPU environment and MXCSR. + ; + fnstenv [xCX] + mov al, [xCX] ; Save FCW. + or byte [xCX], X86_FCW_MASK_ALL + fldcw [xCX] + mov [xCX], al ; Restore FCW. + +%ifdef RT_ARCH_X86 + ; SSE supported (ecx preserved)? + and dword [xCX + 28], 0h + extern NAME(rtNoCrtHasSse) + call NAME(rtNoCrtHasSse) + test al, al + jz .return_nosse +%endif + stmxcsr [xCX + 28] + mov eax, [xCX + 28] ; Save MXCSR. + or dword [xCX + 28], X86_MXCSR_XCPT_MASK + ldmxcsr [xCX + 28] + mov [xCX + 28], eax ; Restore MXCSR. + +.return_nosse: + + ; + ; Return success. + ; + xor eax, eax + leave + ret +ENDPROC RT_NOCRT(feholdexcept) + |