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simplify byte extraction

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This commit is contained in:
Dmitry Vagner 2023-02-16 16:30:50 -08:00
parent 4e4cfb06b3
commit a6ffb4b3c3
2 changed files with 31 additions and 32 deletions
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57
evm/src/cpu/kernel/asm/hash/ripemd/main.asm
View File

@ -22,21 +22,28 @@ global ripemd:
// stack: length
%shl_const(3)
// stack: abcdefgh
%extract_and_store_byte(64)
// stack: abcdefg
%extract_and_store_byte(65)
// stack: abcdef
%extract_and_store_byte(66)
// stack: abcde
%extract_and_store_byte(67)
// stack: abcd
%extract_and_store_byte(68)
// stack: abc
%extract_and_store_byte(69)
// stack: ab
%extract_and_store_byte(70)
// stack: a
%mstore_kernel_general(71)
DUP1
%extract_and_store_byte(31, 64)
// stack: abcdefgh
DUP1
%extract_and_store_byte(30, 65)
// stack: abcdefgh
DUP1
%extract_and_store_byte(29, 66)
// stack: abcdefgh
DUP1
%extract_and_store_byte(28, 67)
// stack: abcdefgh
DUP1
%extract_and_store_byte(27, 68)
// stack: abcdefgh
DUP1
%extract_and_store_byte(26, 69)
// stack: abcdefgh
DUP1
%extract_and_store_byte(25, 70)
// stack: abcdefgh
%extract_and_store_byte(24, 71)
// stack: 0x80
%mstore_kernel_general(72)
@ -113,19 +120,11 @@ process:
SUB
%endmacro
%macro extract_and_store_byte(offset)
// stack: xsy
PUSH 0x100
DUP2
MOD
// stack: y, xsy
%stack (y, xsy) -> (xsy, y, 0x100, y)
// stack: xsy, y, 0x100, y
SUB
DIV
SWAP1
// stack: y, xs
%mstore_kernel_general($offset)
%macro extract_and_store_byte(byte, offset)
// stack: xs
PUSH $byte
BYTE
// stack: xs[byte]
%mstore_kernel_general($offset)
// stack:
%endmacro

6
evm/src/cpu/kernel/asm/util/basic_macros.asm
View File

@ -289,7 +289,7 @@
// given u32 bytestring abcd return dcba
%macro reverse_bytes_u32
// stack: abcd
// stack: abcd
DUP1
PUSH 28
BYTE
@ -308,11 +308,11 @@
PUSH 31
BYTE
%shl_const(24)
// stack: d000, b0, a, c00
// stack: d000, b0, a, c00
OR
OR
OR
// stack: dcba
// stack: dcba
%endmacro
%macro reverse_bytes_u64