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tests/tcg: Test overflow conditions

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Add a test to check for overflow conditions in s390x.
This patch is based on the following patches :
* https://git.qemu.org/?p=qemu.git;a=commitdiff;h=5a2e67a691501
* https://git.qemu.org/?p=qemu.git;a=commitdiff;h=fc6e0d0f2db51

Signed-off-by: Gautam Agrawal <gautamnagrawal@gmail.com>
Message-Id: <20220531183524.40948-1-gautamnagrawal@gmail.com>
[thuth: Move overflow.c to tests/tcg/multiarch/ to make it generic]
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Gautam Agrawal 2022-06-01 00:05:24 +05:30 committed by Thomas Huth
parent 117d794396
commit 69d0535db9
1 changed files with 58 additions and 0 deletions
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58
tests/tcg/multiarch/overflow.c Normal file
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#include <stdio.h>
int overflow_add_32(int x, int y)
{
int res;
return __builtin_add_overflow(x, y, &res);
}
int overflow_add_64(long long x, long long y)
{
long long res;
return __builtin_add_overflow(x, y, &res);
}
int overflow_sub_32(int x, int y)
{
int res;
return __builtin_sub_overflow(x, y, &res);
}
int overflow_sub_64(long long x, long long y)
{
long long res;
return __builtin_sub_overflow(x, y, &res);
}
int a1_add = -2147483648;
int b1_add = -2147483648;
long long a2_add = -9223372036854775808ULL;
long long b2_add = -9223372036854775808ULL;
int a1_sub;
int b1_sub = -2147483648;
long long a2_sub = 0L;
long long b2_sub = -9223372036854775808ULL;
int main()
{
int ret = 0;
if (!overflow_add_32(a1_add, b1_add)) {
fprintf(stderr, "data overflow while adding 32 bits\n");
ret = 1;
}
if (!overflow_add_64(a2_add, b2_add)) {
fprintf(stderr, "data overflow while adding 64 bits\n");
ret = 1;
}
if (!overflow_sub_32(a1_sub, b1_sub)) {
fprintf(stderr, "data overflow while subtracting 32 bits\n");
ret = 1;
}
if (!overflow_sub_64(a2_sub, b2_sub)) {
fprintf(stderr, "data overflow while subtracting 64 bits\n");
ret = 1;
}
return ret;
}