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27 lines
528 B
ArmAsm
27 lines
528 B
ArmAsm
/* https://cirosantilli.com/linux-kernel-module-cheat#x86-bit-and-byte-instructions */
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#include <lkmc.h>
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LKMC_PROLOGUE
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mov $0xFF, %r12
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/* Set Carry flag. */
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stc
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/* Check for carry flag. */
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setc %r12b
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/* Carry flag was set, so set the r12b to 1. */
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LKMC_ASSERT_EQ(%r12, $1)
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/* Clear carry flag. */
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clc
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setc %r12b
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LKMC_ASSERT_EQ(%r12, $0)
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#if 0
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/* The operand size can only be one byte:
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* Error: operand size mismatch for `setc'
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*/
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setc %eax
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#endif
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LKMC_EPILOGUE
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