22 lines
377 B
ArmAsm
22 lines
377 B
ArmAsm
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#include <sys/regdef.h>
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#include <sys/asm.h>
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.globl tas
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.ent tas 2
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tas:
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.set noreorder
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1:
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ori t1, zero, 12345 /* t1 = 12345 */
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ll t0, (a0) /* t0 = *a0 */
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sc t1, (a0) /* *a0 = t1 if *a0 hasn't changed; t1=success */
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beq t1, zero, 1b /* repeat if *a0 did change */
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nop
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j $31 /* return */
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or v0, t0, zero /* set return value on way out */
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.set reorder
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.end tas
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