| 1 | /* $Id: platform.h 106061 2024-09-16 14:03:52Z vboxsync $ */
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| 2 | /** @file
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| 3 | * Platform Header for all VirtualBox targets.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2022-2024 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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| 26 | */
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| 27 |
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| 28 | #ifndef VBOX_INCLUDED_SRC_vbox_platform_h
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| 29 | #define VBOX_INCLUDED_SRC_vbox_platform_h
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| 30 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 31 | # pragma once
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| 32 | #endif
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| 33 |
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| 34 | /* For RT_LITTLE_ENDIAN, RT_ARCH_XXX and more: */
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| 35 | #include <iprt/cdefs.h>
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| 36 |
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| 37 | /* Build config: */
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| 38 | #define SOFTFLOAT_FAST_INT64 /**< We use functions guarded by this, so must be defined regardless of truthiness. */
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| 39 | #define SOFTFLOAT_ROUND_ODD /** @todo Skip this? */
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| 40 |
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| 41 | /* IPRT should detect endianness correctly: */
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| 42 | #ifdef RT_LITTLE_ENDIAN
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| 43 | # define LITTLEENDIAN 1
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| 44 | #endif
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| 45 |
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| 46 | /* Compiler/host configuration bits: */
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| 47 | #define SOFTFLOAT_FAST_DIV32TO16
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| 48 | #if ARCH_BITS > 32 || defined(RT_ARCH_X86)
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| 49 | # define SOFTFLOAT_FAST_DIV64TO32
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| 50 | #endif
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| 51 |
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| 52 | /* See DECLINLINE for guidance: */
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| 53 | #ifdef __GNUC__
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| 54 | # define INLINE static __inline__
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| 55 | #elif defined(__cplusplus)
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| 56 | # define INLINE static inline
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| 57 | #elif defined(_MSC_VER)
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| 58 | # define INLINE static _inline
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| 59 | #else
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| 60 | # error "Port me!"
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| 61 | #endif
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| 62 |
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| 63 | /* Generic IPRT asm.h based optimizations: */
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| 64 | #if !defined(__GNUC__)
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| 65 | # include <iprt/asm.h>
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| 66 | # define softfloat_countLeadingZeros16 softfloat_iprt_countLeadingZeros16
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| 67 | DECLINLINE(uint_fast8_t) softfloat_iprt_countLeadingZeros16(uint16_t uVal)
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| 68 | {
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| 69 | return 16 - ASMBitLastSetU16(uVal);
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| 70 | }
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| 71 | # define softfloat_countLeadingZeros32 softfloat_iprt_countLeadingZeros32
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| 72 | DECLINLINE(uint_fast8_t) softfloat_iprt_countLeadingZeros32(uint32_t uVal)
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| 73 | {
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| 74 | return 32 - ASMBitLastSetU32(uVal);
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| 75 | }
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| 76 | # define softfloat_countLeadingZeros64 softfloat_iprt_countLeadingZeros64
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| 77 | DECLINLINE(uint_fast8_t) softfloat_iprt_countLeadingZeros64(uint64_t uVal)
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| 78 | {
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| 79 | return 64 - ASMBitLastSetU64(uVal);
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| 80 | }
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| 81 | #endif
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| 82 |
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| 83 | /* Include GCC optimizations: */
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| 84 | #ifdef __GNUC__
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| 85 | # ifndef softfloat_countLeadingZeros16
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| 86 | # define SOFTFLOAT_BUILTIN_CLZ 1
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| 87 | # endif
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| 88 | # if ARCH_BITS > 32 && defined(__SIZEOF_INT128__)
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| 89 | # define SOFTFLOAT_INTRINSIC_INT128 1
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| 90 | # endif
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| 91 | # include "opts-GCC.h"
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| 92 | #endif
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| 93 |
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| 94 | /* We've eliminated the global variables and need no TLS variable tricks. */
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| 95 | #ifndef THREAD_LOCAL
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| 96 | # if 1
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| 97 | # define THREAD_LOCAL
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| 98 | # else
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| 99 | # ifdef _MSC_VER
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| 100 | # define THREAD_LOCAL __declspec(thread)
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| 101 | # else
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| 102 | # define THREAD_LOCAL __thread
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| 103 | # endif
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| 104 | # endif
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| 105 | #endif
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| 106 |
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| 107 | #endif /* !VBOX_INCLUDED_SRC_vbox_platform_h */
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