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load little endian

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This commit is contained in:
Dmitry Vagner 2022-09-15 09:21:19 -07:00
parent b08a5772d3
commit e86c7034bc
1 changed files with 26 additions and 0 deletions
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26
evm/src/cpu/kernel/asm/memory/core.asm
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@ -85,6 +85,32 @@
// stack: (((((c_3 << 8) | c_2) << 8) | c_1) << 8) | c_0
%endmacro
// Load a little-endian u32, consisting of 4 bytes (c_0, c_1, c_2, c_3),
// from kernel code.
%macro mload_kernel_code_u32
// stack: offset
DUP1
%mload_kernel_code
// stack: c_0, offset
DUP2
%add_const(1)
%mload_kernel_code
%shl_const(8)
// stack: c0 | (c1 << 8), offset
DUP2
%add_const(2)
%mload_kernel_code
%shl_const(16)
// stack: c0 | (c1 << 8) | (c2 << 16), offset
DUP2
%add_const(3)
%mload_kernel_code
%shl_const(24)
// stack: c0 | (c1 << 8) | (c2 << 16) | (c3 << 24), offset
%endmacro
// Store a single byte to kernel code.
%macro mstore_kernel_code
// stack: offset, value