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This commit is contained in:
Nicholas Ward 2023-05-01 08:09:13 -07:00
parent 037c2f5ee8
commit 08e6c3521c
1 changed files with 23 additions and 12 deletions
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35
evm/src/cpu/kernel/asm/core/precompiles/expmod.asm
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@ -343,31 +343,42 @@ expmod_contd:
// stack: len, len, kexit_info
%mul_const(3)
// stack: out=3*len, len, kexit_info
DUP2
DUP2
// stack: out, len, out, len, kexit_info
ADD
%decrement
SWAP1
%decrement
SWAP1
// stack: cur_address=out+len-1, end_address=out-1, len, kexit_info
PUSH 0
// stack: i=0, cur_address=out, len, kexit_info
// stack: i=0, cur_address, end_address, len, kexit_info
// Store in big-endian format.
expmod_store_loop:
// stack: i, cur_address, len, kexit_info
// stack: i, cur_address, end_address, len, kexit_info
DUP2
// stack: cur_address, i, cur_address, len, kexit_info
// stack: cur_address, i, cur_address, end_address, len, kexit_info
%mload_kernel_general
// stack: cur_limb, i, cur_address, len, kexit_info
// stack: cur_limb, i, cur_address, end_address, len, kexit_info
DUP2
// stack: i, cur_limb, i, cur_address, len, kexit_info
// stack: i, cur_limb, i, cur_address, end_address, len, kexit_info
%mul_const(16)
// stack: offset=16*i, cur_limb, i, cur_address, len, kexit_info
// stack: offset=16*i, cur_limb, i, cur_address, end_address, len, kexit_info
%stack (offset, cur_limb) -> (@SEGMENT_RETURNDATA, offset, cur_limb, 16)
// stack: @SEGMENT_RETURNDATA, offset, cur_limb, 16, i, cur_address, len, kexit_info
// stack: @SEGMENT_RETURNDATA, offset, cur_limb, 16, i, cur_address, end_address, len, kexit_info
%mload_context_metadata(@CTX_METADATA_PARENT_CONTEXT)
// stack: parent_ctx, @SEGMENT_RETURNDATA, offset, cur_limb, 16, i, cur_address, len, kexit_info
// stack: parent_ctx, @SEGMENT_RETURNDATA, offset, cur_limb, 16, i, cur_address, end_address, len, kexit_info
%mstore_unpacking
// stack: offset', i, cur_address, len, kexit_info
// stack: offset', i, cur_address, end_address, len, kexit_info
POP
// stack: i, cur_address, len, kexit_info
// stack: i, cur_address, end_address, len, kexit_info
%increment
SWAP1
%increment
%decrement
SWAP1
// stack: i+1, cur_address+1, len, kexit_info
// stack: i+1, cur_address-1, end_address, len, kexit_info
DUP3
DUP2
EQ