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Impl double

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This commit is contained in:
wborgeaud 2022-07-05 10:45:26 +02:00
parent 92bb8d5fa9
commit 683efc0d74
1 changed files with 23 additions and 9 deletions
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32
evm/src/cpu/kernel/asm/curve_add.asm
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@ -1,15 +1,19 @@
// #define N 0x30644e72e131a029b85045b68181585d97816a916871ca8d3c208c16d87cfd47 // BN254 base field order
global ecadd:
PUSH 2
PUSH 1
PUSH 2
PUSH 1
JUMPDEST
// stack: x0, y0, x1, y1, retdest
DUP3
DUP4
// stack: y1, x0, y0, x1, y1, retdest
DUP3
DUP4
// stack: x1, y1, x0, y0, x1, y1, retdest
DUP3
DUP4
// stack: y0, x1, y1, x0, y0, x1, y1, retdest
DUP3
DUP4
// stack: x0, y0, x1, y1, x0, y0, x1, y1, retdest
%ec_check
// stack: isValid(x0, y0), x1, y1, x0, y0, x1, y1, retdest
@ -188,10 +192,8 @@ ec_add_equal_first_coord:
// stack: y1, y0, N, x0, y0, x1, y1, retdest
ADDMOD
// stack: y1 + y0, x0, y0, x1, y1, retdest
ISZERO
// stack: y1 + y0 == 0, x0, y0, x1, y1, retdest
PUSH ec_add_equal
// stack: ec_add_equal, y1 + y0 == 0, x0, y0, x1, y1, retdest
PUSH ec_add_equal_points
// stack: ec_add_equal_points, y1 + y0, x0, y0, x1, y1, retdest
JUMPI
// stack: x0, y0, x1, y1, retdest
POP
@ -211,7 +213,8 @@ ec_add_equal_first_coord:
JUMP
ec_add_equal:
// Assumption: x0 == x1 and y0 == y1
ec_add_equal_points:
JUMPDEST
// stack: x0, y0, x1, y1, retdest
PUSH 0x30644e72e131a029b85045b68181585d97816a916871ca8d3c208c16d87cfd47
@ -236,6 +239,17 @@ ec_add_equal:
// stack: ec_add_valid_points_with_lambda, lambda, x0, y0, x1, y1, retdest
JUMP
ec_double:
JUMPDEST
// stack: x0, y0, retdest
DUP2
// stack: y0, x0, y0, retdest
DUP2
// stack: x0, y0, x0, y0, retdest
PUSH ec_add_equal_points
// stack: ec_add_equal_points, x0, y0, x0, y0, retdest
JUMP
submod:
JUMPDEST
// stack: x, y, retdest