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https://gitlab.com/qemu-project/qemu-palcode.git
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394234f7d7
Don't include system headers. Instead, provide standalone definitions and declarations of types needed and functions used by the PALcode that are compatible with the standard Alpha / GCC ABI. Signed-off-by: Jason Thorpe <thorpej@me.com> Message-Id: <20210603035317.6814-2-thorpej@me.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
97 lines
1.9 KiB
C
97 lines
1.9 KiB
C
/* The standard memset function.
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Copyright (C) 2011 Richard Henderson
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This file is part of QEMU PALcode.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the text
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of the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not see
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<http://www.gnu.org/licenses/>. */
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#include "protos.h"
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void *memset(void *optr, int ival, unsigned long size)
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{
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unsigned long val = ival;
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void *ptr = optr;
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if (__builtin_expect (size == 0, 0))
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return optr;
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if (__builtin_expect (val != 0, 0))
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{
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val = val & 0xff;
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val |= val << 8;
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val |= val << 16;
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val |= val << 32;
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}
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if (__builtin_expect ((unsigned long)ptr & 1, 0))
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{
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*(char *)ptr = val;
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ptr += 1;
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size -= 1;
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}
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if (__builtin_expect ((unsigned long)ptr & 2, 0))
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{
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if (size < 2)
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goto tail_1;
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*(short *)ptr = val;
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ptr += 2;
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size -= 2;
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}
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if (__builtin_expect ((unsigned long)ptr & 4, 0))
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{
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if (size < 4)
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goto tail_3;
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*(int *)ptr = val;
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ptr += 4;
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size -= 4;
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}
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while (size >= 8)
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{
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*(long *)ptr = val;
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ptr += 8;
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size -= 8;
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}
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if (size >= 4)
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{
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*(int *)ptr = val;
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ptr += 4;
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size -= 4;
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}
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tail_3:
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if (size >= 2)
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{
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*(short *)ptr = val;
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ptr += 2;
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size -= 2;
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}
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tail_1:
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if (size > 0)
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{
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*(char *)ptr = val;
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ptr += 1;
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size -= 1;
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}
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return optr;
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}
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