/** @file * IPRT - Assembly Functions, x86 32-bit Watcom C/C++ pragma aux. */ /* * Copyright (C) 2006-2024 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 */ #ifndef IPRT_INCLUDED_asm_watcom_x86_32_h #define IPRT_INCLUDED_asm_watcom_x86_32_h /* no pragma once */ #ifndef IPRT_INCLUDED_asm_h # error "Don't include this header directly." #endif #ifndef __FLAT__ # error "Only works with flat pointers! (-mf)" #endif /* * Note! The #undef that preceds the #pragma aux statements is for undoing * the mangling, because the symbol in #pragma aux [symbol] statements * doesn't get subjected to preprocessing. This is also why we include * the watcom header at both the top and the bottom of asm.h file. */ #undef ASMCompilerBarrier #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS # if 0 /* overkill version. */ # pragma aux ASMCompilerBarrier = \ "nop" \ parm [] \ modify exact [eax ebx ecx edx es ds fs gs]; # else # pragma aux ASMCompilerBarrier = \ "" \ parm [] \ modify exact []; # endif #endif #undef ASMNopPause #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMNopPause = \ ".686p" \ ".xmm2" \ "pause" \ parm [] nomemory \ modify exact [] nomemory; #endif #undef ASMAtomicXchgU8 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicXchgU8 = \ "xchg [ecx], al" \ parm [ecx] [al] \ value [al] \ modify exact [al]; #endif #undef ASMAtomicXchgU16 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicXchgU16 = \ "xchg [ecx], ax" \ parm [ecx] [ax] \ value [ax] \ modify exact [ax]; #endif #undef ASMAtomicXchgU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicXchgU32 = \ "xchg [ecx], eax" \ parm [ecx] [eax] \ value [eax] \ modify exact [eax]; #endif #undef ASMAtomicXchgU64 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicXchgU64 = \ ".586" \ "try_again:" \ "lock cmpxchg8b [esi]" \ "jnz try_again" \ parm [esi] [ebx ecx] \ value [eax edx] \ modify exact [edx ecx ebx eax]; #endif #undef ASMAtomicCmpXchgU8 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicCmpXchgU8 = \ ".486" \ "lock cmpxchg [edx], cl" \ "setz al" \ parm [edx] [cl] [al] \ value [al] \ modify exact [al]; #endif #undef ASMAtomicCmpXchgU16 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicCmpXchgU16 = \ ".486" \ "lock cmpxchg [edx], cx" \ "setz al" \ parm [edx] [cx] [ax] \ value [al] \ modify exact [ax]; #endif #undef ASMAtomicCmpXchgU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicCmpXchgU32 = \ ".486" \ "lock cmpxchg [edx], ecx" \ "setz al" \ parm [edx] [ecx] [eax] \ value [al] \ modify exact [eax]; #endif #undef ASMAtomicCmpXchgU64 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicCmpXchgU64 = \ ".586" \ "lock cmpxchg8b [edi]" \ "setz al" \ parm [edi] [ebx ecx] [eax edx] \ value [al] \ modify exact [eax edx]; #endif #undef ASMAtomicCmpXchgExU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicCmpXchgExU32 = \ ".586" \ "lock cmpxchg [edx], ecx" \ "mov [edi], eax" \ "setz al" \ parm [edx] [ecx] [eax] [edi] \ value [al] \ modify exact [eax]; #endif #undef ASMAtomicCmpXchgExU64 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicCmpXchgExU64 = \ ".586" \ "lock cmpxchg8b [edi]" \ "mov [esi], eax" \ "mov [esi + 4], edx" \ "setz al" \ parm [edi] [ebx ecx] [eax edx] [esi] \ value [al] \ modify exact [eax edx]; #endif #undef ASMSerializeInstructionCpuId #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMSerializeInstructionCpuId = \ ".586" \ "xor eax, eax" \ "cpuid" \ parm [] \ modify exact [eax ebx ecx edx]; #endif #undef ASMSerializeInstructionIRet #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMSerializeInstructionIRet = \ "pushf" \ "push cs" \ "call foo" /* 'push offset done' doesn't work */ \ "jmp done" \ "foo:" \ "iret" \ "done:" \ parm [] \ modify exact []; #endif #undef ASMSerializeInstructionRdTscp #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMSerializeInstructionRdTscp = \ 0x0f 0x01 0xf9 \ parm [] \ modify exact [eax edx ecx]; #endif #undef ASMAtomicReadU64 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicReadU64 = \ ".586" \ "xor eax, eax" \ "mov edx, eax" \ "mov ebx, eax" \ "mov ecx, eax" \ "lock cmpxchg8b [edi]" \ parm [edi] \ value [eax edx] \ modify exact [eax ebx ecx edx]; #endif #undef ASMAtomicUoReadU64 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicUoReadU64 = \ ".586" \ "xor eax, eax" \ "mov edx, eax" \ "mov ebx, eax" \ "mov ecx, eax" \ "lock cmpxchg8b [edi]" \ parm [edi] \ value [eax edx] \ modify exact [eax ebx ecx edx]; #endif #undef ASMAtomicAddU16 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicAddU16 = \ ".486" \ "lock xadd [ecx], ax" \ parm [ecx] [ax] \ value [ax] \ modify exact [ax]; #endif #undef ASMAtomicAddU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicAddU32 = \ ".486" \ "lock xadd [ecx], eax" \ parm [ecx] [eax] \ value [eax] \ modify exact [eax]; #endif #undef ASMAtomicIncU16 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicIncU16 = \ ".486" \ "mov ax, 1" \ "lock xadd [ecx], ax" \ "inc ax" \ parm [ecx] \ value [ax] \ modify exact [ax]; #endif #undef ASMAtomicIncU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicIncU32 = \ ".486" \ "mov eax, 1" \ "lock xadd [ecx], eax" \ "inc eax" \ parm [ecx] \ value [eax] \ modify exact [eax]; #endif /* ASMAtomicIncU64: Should be done by C inline or in external file. */ #undef ASMAtomicDecU16 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicDecU16 = \ ".486" \ "mov ax, 0ffffh" \ "lock xadd [ecx], ax" \ "dec ax" \ parm [ecx] \ value [ax] \ modify exact [ax]; #endif #undef ASMAtomicDecU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicDecU32 = \ ".486" \ "mov eax, 0ffffffffh" \ "lock xadd [ecx], eax" \ "dec eax" \ parm [ecx] \ value [eax] \ modify exact [eax]; #endif /* ASMAtomicDecU64: Should be done by C inline or in external file. */ #undef ASMAtomicOrU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicOrU32 = \ "lock or [ecx], eax" \ parm [ecx] [eax] \ modify exact []; #endif /* ASMAtomicOrU64: Should be done by C inline or in external file. */ #undef ASMAtomicAndU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicAndU32 = \ "lock and [ecx], eax" \ parm [ecx] [eax] \ modify exact []; #endif /* ASMAtomicAndU64: Should be done by C inline or in external file. */ #undef ASMAtomicUoOrU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicUoOrU32 = \ "or [ecx], eax" \ parm [ecx] [eax] \ modify exact []; #endif /* ASMAtomicUoOrU64: Should be done by C inline or in external file. */ #undef ASMAtomicUoAndU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicUoAndU32 = \ "and [ecx], eax" \ parm [ecx] [eax] \ modify exact []; #endif /* ASMAtomicUoAndU64: Should be done by C inline or in external file. */ #undef ASMAtomicUoIncU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicUoIncU32 = \ ".486" \ "xadd [ecx], eax" \ "inc eax" \ parm [ecx] \ value [eax] \ modify exact [eax]; #endif #undef ASMAtomicUoDecU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicUoDecU32 = \ ".486" \ "mov eax, 0ffffffffh" \ "xadd [ecx], eax" \ "dec eax" \ parm [ecx] \ value [eax] \ modify exact [eax]; #endif #undef ASMBitSet #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMBitSet = \ "bts [ecx], eax" \ parm [ecx] [eax] \ modify exact []; #endif #undef ASMAtomicBitSet #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicBitSet = \ "lock bts [ecx], eax" \ parm [ecx] [eax] \ modify exact []; #endif #undef ASMBitClear #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMBitClear = \ "btr [ecx], eax" \ parm [ecx] [eax] \ modify exact []; #endif #undef ASMAtomicBitClear #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicBitClear = \ "lock btr [ecx], eax" \ parm [ecx] [eax] \ modify exact []; #endif #undef ASMBitToggle #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMBitToggle = \ "btc [ecx], eax" \ parm [ecx] [eax] \ modify exact []; #endif #undef ASMAtomicBitToggle #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicBitToggle = \ "lock btc [ecx], eax" \ parm [ecx] [eax] \ modify exact []; #endif #undef ASMBitTestAndSet #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMBitTestAndSet = \ "bts [ecx], eax" \ "setc al" \ parm [ecx] [eax] \ value [al] \ modify exact [eax]; #endif #undef ASMAtomicBitTestAndSet #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicBitTestAndSet = \ "lock bts [ecx], eax" \ "setc al" \ parm [ecx] [eax] \ value [al] \ modify exact [eax]; #endif #undef ASMBitTestAndClear #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMBitTestAndClear = \ "btr [ecx], eax" \ "setc al" \ parm [ecx] [eax] \ value [al] \ modify exact [eax]; #endif #undef ASMAtomicBitTestAndClear #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicBitTestAndClear = \ "lock btr [ecx], eax" \ "setc al" \ parm [ecx] [eax] \ value [al] \ modify exact [eax]; #endif #undef ASMBitTestAndToggle #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMBitTestAndToggle = \ "btc [ecx], eax" \ "setc al" \ parm [ecx] [eax] \ value [al] \ modify exact [eax]; #endif #undef ASMAtomicBitTestAndToggle #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMAtomicBitTestAndToggle = \ "lock btc [ecx], eax" \ "setc al" \ parm [ecx] [eax] \ value [al] \ modify exact [eax]; #endif #undef ASMBitTest #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMBitTest = \ "bt [ecx], eax" \ "setc al" \ parm [ecx] [eax] nomemory \ value [al] \ modify exact [eax] nomemory; #endif #if 0 /** @todo this is way to much inline assembly, better off in an external function. */ #undef ASMBitFirstClear #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMBitFirstClear = \ "mov edx, edi" /* save start of bitmap for later */ \ "add ecx, 31" \ "shr ecx, 5" /* cDWord = RT_ALIGN_32(cBits, 32) / 32; */ \ "mov eax, 0ffffffffh" \ "repe scasd" \ "je done" \ "lea edi, [edi - 4]" /* rewind edi */ \ "xor eax, [edi]" /* load inverted bits */ \ "sub edi, edx" /* calc byte offset */ \ "shl edi, 3" /* convert byte to bit offset */ \ "mov edx, eax" \ "bsf eax, edx" \ "add eax, edi" \ "done:" \ parm [edi] [ecx] \ value [eax] \ modify exact [eax ecx edx edi]; #endif /* ASMBitNextClear: Too much work, do when needed. */ /** @todo this is way to much inline assembly, better off in an external function. */ #undef ASMBitFirstSet #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMBitFirstSet = \ "mov edx, edi" /* save start of bitmap for later */ \ "add ecx, 31" \ "shr ecx, 5" /* cDWord = RT_ALIGN_32(cBits, 32) / 32; */ \ "mov eax, 0ffffffffh" \ "repe scasd" \ "je done" \ "lea edi, [edi - 4]" /* rewind edi */ \ "mov eax, [edi]" /* reload previous dword */ \ "sub edi, edx" /* calc byte offset */ \ "shl edi, 3" /* convert byte to bit offset */ \ "mov edx, eax" \ "bsf eax, edx" \ "add eax, edi" \ "done:" \ parm [edi] [ecx] \ value [eax] \ modify exact [eax ecx edx edi]; #endif /* ASMBitNextSet: Too much work, do when needed. */ #else /* ASMBitFirstClear: External file. */ /* ASMBitNextClear: External file. */ /* ASMBitFirstSet: External file. */ /* ASMBitNextSet: External file. */ #endif #undef ASMBitFirstSetU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMBitFirstSetU32 = \ "bsf eax, eax" \ "jz not_found" \ "inc eax" \ "jmp done" \ "not_found:" \ "xor eax, eax" \ "done:" \ parm [eax] nomemory \ value [eax] \ modify exact [eax] nomemory; #endif #undef ASMBitFirstSetU64 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMBitFirstSetU64 = \ "bsf eax, eax" \ "jz not_found_low" \ "inc eax" \ "jmp done" \ \ "not_found_low:" \ "bsf eax, edx" \ "jz not_found_high" \ "add eax, 33" \ "jmp done" \ \ "not_found_high:" \ "xor eax, eax" \ "done:" \ parm [eax edx] nomemory \ value [eax] \ modify exact [eax] nomemory; #endif #undef ASMBitFirstSetU16 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMBitFirstSetU16 = \ "movzx eax, ax" \ "bsf eax, eax" \ "jz not_found" \ "inc eax" \ "jmp done" \ "not_found:" \ "xor eax, eax" \ "done:" \ parm [ax] nomemory \ value [eax] \ modify exact [eax] nomemory; #endif #undef ASMBitLastSetU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMBitLastSetU32 = \ "bsr eax, eax" \ "jz not_found" \ "inc eax" \ "jmp done" \ "not_found:" \ "xor eax, eax" \ "done:" \ parm [eax] nomemory \ value [eax] \ modify exact [eax] nomemory; #endif #undef ASMBitLastSetU64 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMBitLastSetU64 = \ "xchg eax, edx" \ "bsr eax, eax" \ "jz not_found_high" \ "add eax, 33" \ "jmp done" \ \ "not_found_high:" \ "bsr eax, edx" \ "jz not_found" \ "inc eax" \ "jmp done" \ \ "not_found:" \ "xor eax, eax" \ "done:" \ parm [eax edx] nomemory \ value [eax] \ modify exact [eax edx] nomemory; #endif #undef ASMBitLastSetU16 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMBitLastSetU16 = \ "movzx eax, ax" \ "bsr eax, eax" \ "jz not_found" \ "inc eax" \ "jmp done" \ "not_found:" \ "xor eax, eax" \ "done:" \ parm [ax] nomemory \ value [eax] \ modify exact [eax] nomemory; #endif #undef ASMByteSwapU16 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMByteSwapU16 = \ "ror ax, 8" \ parm [ax] nomemory \ value [ax] \ modify exact [ax] nomemory; #endif #undef ASMByteSwapU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMByteSwapU32 = \ "bswap eax" \ parm [eax] nomemory \ value [eax] \ modify exact [eax] nomemory; #endif #undef ASMRotateLeftU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMRotateLeftU32 = \ "rol eax, cl" \ parm [eax] [ecx] nomemory \ value [eax] \ modify exact [eax] nomemory; #endif #undef ASMRotateRightU32 #ifdef IPRT_ASM_WATCOM_X86_32_WITH_PRAGMAS #pragma aux ASMRotateRightU32 = \ "ror eax, cl" \ parm [eax] [ecx] nomemory \ value [eax] \ modify exact [eax] nomemory; #endif #endif /* !IPRT_INCLUDED_asm_watcom_x86_32_h */