72 lines
3.2 KiB
C
72 lines
3.2 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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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; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/nexgen32e/nexgen32e.h"
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#include "libc/testlib/testlib.h"
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TEST(memset, testMulTrick4) {
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long i, j;
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unsigned long x;
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long di, si, dx, ax;
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volatile uint8_t *b;
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b = tgc(tmalloc(4));
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for (i = 0; i < 255; ++i) {
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for (j = -1; j < 1; ++j) {
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x = j;
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x &= ~0xff;
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x |= i;
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asm volatile("call\tmemset"
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: "=D"(di), "=S"(si), "=d"(dx), "=a"(ax)
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: "0"(b), "1"(x), "2"(4)
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: "rcx", "memory", "cc");
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ASSERT_EQ(x & 0xff, b[0]);
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ASSERT_EQ(x & 0xff, b[1]);
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ASSERT_EQ(x & 0xff, b[2]);
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ASSERT_EQ(x & 0xff, b[3]);
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}
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}
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}
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TEST(memset, testMulTrick8) {
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long i, j;
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unsigned long x;
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long di, si, dx, ax;
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volatile uint8_t *b;
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b = tgc(tmalloc(8));
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for (i = 0; i < 255; ++i) {
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for (j = -1; j < 1; ++j) {
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x = j;
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x &= ~0xff;
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x |= i;
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asm volatile("call\tmemset"
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: "=D"(di), "=S"(si), "=d"(dx), "=a"(ax)
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: "0"(b), "1"(x), "2"(8)
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: "rcx", "memory", "cc");
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ASSERT_EQ(x & 0xff, b[0]);
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ASSERT_EQ(x & 0xff, b[1]);
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ASSERT_EQ(x & 0xff, b[2]);
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ASSERT_EQ(x & 0xff, b[3]);
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ASSERT_EQ(x & 0xff, b[4]);
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ASSERT_EQ(x & 0xff, b[5]);
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ASSERT_EQ(x & 0xff, b[6]);
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ASSERT_EQ(x & 0xff, b[7]);
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}
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}
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}
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