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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 03:01:46 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 03:01:46 +0000 |
commit | f8fe689a81f906d1b91bb3220acde2a4ecb14c5b (patch) | |
tree | 26484e9d7e2c67806c2d1760196ff01aaa858e8c /src/VBox/Runtime/common/math/RTUInt128MulByU64.asm | |
parent | Initial commit. (diff) | |
download | virtualbox-f8fe689a81f906d1b91bb3220acde2a4ecb14c5b.tar.xz virtualbox-f8fe689a81f906d1b91bb3220acde2a4ecb14c5b.zip |
Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/Runtime/common/math/RTUInt128MulByU64.asm')
-rw-r--r-- | src/VBox/Runtime/common/math/RTUInt128MulByU64.asm | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/math/RTUInt128MulByU64.asm b/src/VBox/Runtime/common/math/RTUInt128MulByU64.asm new file mode 100644 index 00000000..8c669bfc --- /dev/null +++ b/src/VBox/Runtime/common/math/RTUInt128MulByU64.asm @@ -0,0 +1,81 @@ +; $Id: RTUInt128MulByU64.asm $ +;; @file +; IPRT - RTUInt128MulByU64 - AMD64 implementation. +; + +; +; Copyright (C) 2006-2019 Oracle Corporation +; +; This file is part of VirtualBox Open Source Edition (OSE), as +; available from http://www.virtualbox.org. This file is free software; +; you can redistribute it and/or modify it under the terms of the GNU +; General Public License (GPL) as published by the Free Software +; Foundation, in version 2 as it comes in the "COPYING" file of the +; VirtualBox OSE distribution. VirtualBox OSE is distributed in the +; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. +; +; The contents of this file may alternatively be used under the terms +; of the Common Development and Distribution License Version 1.0 +; (CDDL) only, as it comes in the "COPYING.CDDL" file of the +; VirtualBox OSE 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. +; + + +%define RT_ASM_WITH_SEH64 +%include "iprt/asmdefs.mac" +%include "internal/bignum.mac" + + +BEGINCODE + +;; +; Multiplies a 128-bit number with a 64-bit one. +; +; @returns puResult. +; @param puResult x86:[ebp + 8] gcc:rdi msc:rcx +; @param puValue1 x86:[ebp + 12] gcc:rsi msc:rdx +; @param uValue2 x86:[ebp + 16] gcc:rdx msc:r8 +; +BEGINPROC_EXPORTED RTUInt128MulByU64 +; SEH64_SET_FRAME_xSP 0 +SEH64_END_PROLOGUE + +%ifdef RT_ARCH_AMD64 + %ifdef ASM_CALL64_GCC + %define puResult rdi + %define puValue1 rsi + %define uValue2 r8 + mov r8, rdx + %else + %define puResult rcx + %define puValue1 r9 + %define uValue2 r8 + mov r9, rdx + %endif + + ; puValue1->s.Lo * uValue2 + mov rax, [puValue1] + mul uValue2 + mov [puResult], rax + mov r11, rdx ; Store the lower half of the result. + + ; puValue1->s.Hi * uValue2 + mov rax, [puValue1 + 8] + mul uValue2 + add r11, rax ; Calc the second half of the result. + mov [puResult + 8], r11 ; Store the high half of the result. + + mov rax, puResult + +;%elifdef RT_ARCH_X86 +%else + %error "unsupported arch" +%endif + + ret +ENDPROC RTUInt128MulByU64 + |