1 files changed, 90 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/math/fegetenv.asm b/src/VBox/Runtime/common/math/fegetenv.asm
new file mode 100644
index 00000000..073e64f4
--- /dev/null
+++ b/src/VBox/Runtime/common/math/fegetenv.asm
@@ -0,0 +1,90 @@
+; $Id: fegetenv.asm $
+;; @file
+; IPRT - No-CRT fegetenv - 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.
+;
+; @returns  eax = 0 on success (-1 on failure),
+; @param    pEnv    32-bit: [xBP+8]; msc64: rcx; gcc64: rdi -- Pointer to where to store the enviornment.
+;
+RT_NOCRT_BEGINPROC fegetenv
+        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]
+
+%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]
+.return_nosse:
+
+        ;
+        ; Return success.
+        ;
+        xor     eax, eax
+        leave
+        ret
+ENDPROC   RT_NOCRT(fegetenv)
+