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When DIG_SIZE=32, a uint32_t is used to store limbs, and no normalisation is needed because the MSB is already set, then there will be left and right shifts (in C) by 32 of a 32-bit variable, leading to undefined behaviour. This patch fixes this bug.
18 lines
589 B
Python
18 lines
589 B
Python
# test % operation on big integers
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delta = 100000000000000000000000000000012345
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for i in range(11):
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for j in range(11):
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x = delta * (i)# - 5) # TODO reinstate negative number test when % is working with sign correctly
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y = delta * (j)# - 5) # TODO reinstate negative number test when % is working with sign correctly
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if y != 0:
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print(x % y)
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# these check an edge case on 64-bit machines where two mpz limbs
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# are used and the most significant one has the MSB set
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x = 0x8000000000000000
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print((x + 1) % x)
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x = 0x86c60128feff5330
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print((x + 1) % x)
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