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This commit is contained in:
Nicholas Ward 2023-03-14 12:20:38 -07:00
parent 04f44ef4da
commit 87ad5714aa
1 changed files with 2 additions and 1 deletions
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3
evm/src/cpu/kernel/asm/bignum/shr.asm
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@ -2,6 +2,7 @@
// All integers must be under a given length bound, and are padded with leading zeroes.
// Shifts a given bignum right by one bit (in place).
// Assumes that len > 0.
global shr_bignum:
// stack: len, start_loc, retdest
DUP2
@ -30,7 +31,7 @@ shr_loop:
// stack: carry, a[i] >> 1, i, new_carry, start_loc, retdest
%shl_const(127)
// stack: carry << 127, a[i] >> 1, i, new_carry, start_loc, retdest
OR
ADD
// stack: carry << 127 | a[i] >> 1, i, new_carry, start_loc, retdest
DUP2
// stack: i, carry << 127 | a[i] >> 1, i, new_carry, start_loc, retdest