1 files changed, 127 insertions, 0 deletions
diff --git a/src/VBox/VMM/testcase/tstX86-FpuSaveRestoreA.asm b/src/VBox/VMM/testcase/tstX86-FpuSaveRestoreA.asm
new file mode 100644
index 00000000..424ecc6a
--- /dev/null
+++ b/src/VBox/VMM/testcase/tstX86-FpuSaveRestoreA.asm
@@ -0,0 +1,127 @@
+; $Id: tstX86-FpuSaveRestoreA.asm $
+;; @file
+; tstX86-FpuSaveRestore - Experimenting with saving and restoring FPU, assembly bits.
+;
+
+;
+; Copyright (C) 2013-2023 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>.
+;
+; SPDX-License-Identifier: GPL-3.0-only
+;
+
+
+
+;*******************************************************************************
+;*  Header Files                                                               *
+;*******************************************************************************
+%include "iprt/asmdefs.mac"
+%include "iprt/x86.mac"
+
+
+;*******************************************************************************
+;*  Global Variables                                                           *
+;*******************************************************************************
+BEGINCODE
+g_r80_Zero:     dt 0.0
+g_r80_One:      dt 1.0
+
+
+BEGINCODE
+
+;; Prepares a FPU exception.
+BEGINPROC MyFpuPrepXcpt
+        fld tword [g_r80_One  xWrtRIP]
+        fld tword [g_r80_Zero xWrtRIP]
+        fdiv    st0
+        ret
+ENDPROC   MyFpuPrepXcpt
+
+
+;; Same as above, just different address.
+BEGINPROC MyFpuPrepXcpt2
+        fld tword [g_r80_One  xWrtRIP]
+        fld tword [g_r80_Zero xWrtRIP]
+        fdiv    st0
+        ret
+ENDPROC   MyFpuPrepXcpt2
+
+
+BEGINPROC MyFpuSave
+%ifdef ASM_CALL64_MSC
+        o64 fxsave  [rcx]
+%elifdef ASM_CALL64_GCC
+        o64 fxsave  [rdi]
+%elifdef RT_ARCH_X86
+        mov         ecx, [esp + 4]
+        fxsave      [ecx]
+%else
+ %error "Unsupported architecture."
+        bad arch
+%endif
+        ret
+ENDPROC   MyFpuSave
+
+
+BEGINPROC MyFpuStoreEnv
+%ifdef ASM_CALL64_MSC
+        fstenv  [rcx]
+%elifdef ASM_CALL64_GCC
+        fstenv  [rdi]
+%elifdef RT_ARCH_X86
+        mov     ecx, [esp + 4]
+        fstenv  [ecx]
+%else
+ %error "Unsupported architecture."
+        bad arch
+%endif
+        ret
+ENDPROC   MyFpuStoreEnv
+
+
+BEGINPROC MyFpuRestore
+%ifdef ASM_CALL64_MSC
+        o64 fxrstor [rcx]
+%elifdef ASM_CALL64_GCC
+        o64 fxrstor [rdi]
+%elifdef RT_ARCH_X86
+        mov         ecx, [esp + 4]
+        fxrstor     [ecx]
+%else
+ %error "Unsupported architecture."
+        bad arch
+%endif
+        ret
+ENDPROC   MyFpuRestore
+
+
+BEGINPROC MyFpuLoadEnv
+%ifdef ASM_CALL64_MSC
+        fldenv  [rcx]
+%elifdef ASM_CALL64_GCC
+        fldenv  [rdi]
+%elifdef RT_ARCH_X86
+        mov     ecx, [esp + 4]
+        fldenv  [ecx]
+%else
+ %error "Unsupported architecture."
+        bad arch
+%endif
+        ret
+ENDPROC   MyFpuLoadEnv
+