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19 lines
434 B
ArmAsm
19 lines
434 B
ArmAsm
/* https://github.com/cirosantilli/linux-kernel-module-cheat#x86-data-transfer-instructions
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*
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* LIke MOVZX but sign extend.
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*/
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#include <lkmc.h>
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LKMC_PROLOGUE
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/* Top bit is 0, extend with zero. */
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mov $0x1234567F, %eax
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movsx %al, %ax
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LKMC_ASSERT_EQ_32(%eax, $0x1234007F)
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/* Top bit is 1: extend with one. */
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mov $0x12345680, %eax
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movsx %al, %ax
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LKMC_ASSERT_EQ_32(%eax, $0x1234FF80)
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LKMC_EPILOGUE
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