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Fix bugs in truncation of vectors #1797

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Merged
mkskeller merged 1 commit into from
Nov 5, 2026
+2 −1
Merged

Fix bugs in truncation of vectors #1797

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2 changes: 1 addition & 1 deletion Compiler/floatingpoint.py
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Original file line number Diff line number Diff line change
Expand Up @@ -499,7 +499,7 @@ def TruncInRing(to_shift, l, pow2m):
rev = types.sint.bit_compose(reversed(bits))
rev <<= n_shift
rev *= pow2m
r_bits = [types.sint.get_random_bit() for i in range(l)]
r_bits = [types.sint.get_random_bit(size=rev.size) for i in range(l)]
r = types.sint.bit_compose(r_bits)
shifted = (rev - (r << n_shift)).reveal(False)
masked = shifted >> n_shift
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1 change: 1 addition & 0 deletions Compiler/types.py
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Expand Up @@ -3135,6 +3135,7 @@ def int_mod(self, other, bit_length=None):
"""
return self - other * self.int_div(other, bit_length=bit_length)

@vectorize
def trunc_zeros(self, n_zeros, bit_length=None, signed=True):
bit_length = bit_length or program.bit_length
return comparison.TruncZeros(self, bit_length, n_zeros, signed)
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