From f215e02bf85f68d3a6106c2a1f4f7f063f819064 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:17:27 +0200 Subject: Adding upstream version 7.0.14-dfsg. Signed-off-by: Daniel Baumann --- src/VBox/Runtime/common/math/fesetexceptflag.asm | 127 +++++++++++++++++++++++ 1 file changed, 127 insertions(+) create mode 100644 src/VBox/Runtime/common/math/fesetexceptflag.asm (limited to 'src/VBox/Runtime/common/math/fesetexceptflag.asm') diff --git a/src/VBox/Runtime/common/math/fesetexceptflag.asm b/src/VBox/Runtime/common/math/fesetexceptflag.asm new file mode 100644 index 00000000..548437a8 --- /dev/null +++ b/src/VBox/Runtime/common/math/fesetexceptflag.asm @@ -0,0 +1,127 @@ +; $Id: fesetexceptflag.asm $ +;; @file +; IPRT - No-CRT fesetexceptflag - 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 . +; +; 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 pending exceptions. +; +; @returns eax = 0 on success, non-zero on failure. +; @param pfXcpts 32-bit: [xBP+8]; msc64: rcx; gcc64: rdi; -- pointer to fexcept_t (16-bit) +; @param fXcptMask 32-bit: [xBP+c]; msc64: edx; gcc64: esi; -- X86_MXCSR_XCPT_FLAGS (X86_FSW_XCPT_MASK) +; Accepts X86_FSW_SF. +; +RT_NOCRT_BEGINPROC fesetexceptflag + push xBP + SEH64_PUSH_xBP + mov xBP, xSP + SEH64_SET_FRAME_xBP 0 + sub xSP, 10h + SEH64_ALLOCATE_STACK 20h + SEH64_END_PROLOGUE + + ; + ; Load the parameter into ecx (*pfXcpts) and edx (fXcptMask) and validate the latter. + ; +%ifdef ASM_CALL64_GCC + movzx ecx, word [rdi] + mov edx, esi +%elifdef ASM_CALL64_MSC + movzx ecx, word [rcx] +%elifdef RT_ARCH_X86 + mov ecx, [xBP + xCB*2] + movzx ecx, word [ecx] + mov edx, [xBP + xCB*3] +%endif +%if 0 + and ecx, X86_FSW_XCPT_MASK + and edx, X86_FSW_XCPT_MASK +%else + or eax, -1 + test edx, ~X86_FSW_XCPT_MASK + jnz .return + test ecx, ~X86_FSW_XCPT_MASK + jnz .return +%endif + + ; + ; Apply the AND mask to ECX and invert it so we can use it to clear flags + ; before OR'ing in the new values. + ; + and ecx, edx + not edx + + ; + ; Make the modifications + ; + + ; Modify the pending x87 exceptions (FSW). + fnstenv [xBP - 20h] + and [xBP - 20h + X86FSTENV32P.FSW], dx + or [xBP - 20h + X86FSTENV32P.FSW], cx + fldenv [xSP - 20h] + +%ifdef RT_ARCH_X86 + ; SSE supported (ecx preserved)? + extern NAME(rtNoCrtHasSse) + call NAME(rtNoCrtHasSse) + test al, al + jz .return_ok +%endif + + ; Modify the pending SSE exceptions (same bit positions as in FSW). + stmxcsr [xBP - 10h] + mov eax, [xBP - 10h] + or edx, X86_FSW_XCPT_MASK & ~X86_MXCSR_XCPT_FLAGS ; Don't mix X86_FSW_SF with X86_MXCSR_DAZ. + and ecx, X86_MXCSR_XCPT_FLAGS ; Ditto + and eax, edx + or eax, ecx + mov [xBP - 10h], eax + ldmxcsr [xBP - 10h] + +.return_ok: + xor eax, eax +.return: + leave + ret +ENDPROC RT_NOCRT(fesetexceptflag) + -- cgit v1.2.3