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25 lines
574 B
NASM
25 lines
574 B
NASM
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%macro as_u64
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%and_const(0xffffffffffffffff)
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%endmacro
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// 64-bit right rotation
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%macro rotr_64(rot)
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// stack: value
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PUSH $rot
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// stack: rot, value
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DUP2
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DUP2
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// stack: rot, value, rot, value
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SHR
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// stack: value >> rot, rot, value
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%stack (shifted, rot, value) -> (rot, value, shifted)
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// stack: rot, value, value >> rot
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PUSH 64
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SUB
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// stack: 64 - rot, value, value >> rot
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SHL
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// stack: value << (64 - rot), value >> rot
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%as_u64
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// stack: (value << (64 - rot)) % (1 << 64), value >> rot
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ADD
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%endmacro
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