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validity check: test all 32 results from count_leading_zeros() & count_leading_ones() [smf]

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smf- 2018-03-21 16:48:52 +00:00
parent 418bc70cfa
commit 0883f01e66
1 changed files with 12 additions and 10 deletions
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22
src/emu/validity.cpp
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@ -511,16 +511,18 @@ void validity_checker::validate_inlines()
if (fabsf(recip_approx(100.0f) - 0.01f) > 0.0001f)
osd_printf_error("Error testing recip_approx\n");
testi32a = (testi32a & 0x0000ffff) | 0x400000;
if (count_leading_zeros(testi32a) != 9)
osd_printf_error("Error testing count_leading_zeros\n");
if (count_leading_zeros(0) != 32)
osd_printf_error("Error testing count_leading_zeros\n");
testi32a = (testi32a | 0xffff0000) & ~0x400000;
if (count_leading_ones(testi32a) != 9)
osd_printf_error("Error testing count_leading_ones\n");
if (count_leading_ones(0xffffffff) != 32)
osd_printf_error("Error testing count_leading_ones\n");
for (int i = 0; i <= 32; i++)
{
u32 t = i < 32 ? (1 << (31 - i) | testu32a >> i) : 0;
u8 resultu8 = count_leading_zeros(t);
if (resultu8 != i)
osd_printf_error("Error testing count_leading_zeros %08x=%02x (expected %02x)\n", t, resultu8, i);
t ^= 0xffffffff;
resultu8 = count_leading_ones(t);
if (resultu8 != i)
osd_printf_error("Error testing count_leading_ones %08x=%02x (expected %02x)\n", t, resultu8, i);
}
}