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26 lines
708 B
ArmAsm
26 lines
708 B
ArmAsm
/* https://github.com/cirosantilli/linux-kernel-module-cheat#x86-binary-arithmetic-instructions
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*
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* Add with Carry. Like add, but if the carry flag is set, add 1 to the addition.
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*
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* This allows implementing arbitrary precision arithmetic.
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*/
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#include <lkmc.h>
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LKMC_PROLOGUE
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/* rax : rbx += rcx : rdx
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* 1 : 0x8000000000000001 += 0x10 : 0x8000000000000010
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* 0x12 : 0x11
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*/
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mov $0x1, %rax
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mov $0x8000000000000001, %rbx
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mov $0x10, %rcx
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mov $0x8000000000000010, %rdx
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add %rdx, %rbx
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adc %rcx, %rax
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mov %rax, %r12
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mov %rbx, %r13
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LKMC_ASSERT_EQ(%r12, $0x12)
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LKMC_ASSERT_EQ(%r13, $0x11)
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LKMC_EPILOGUE
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