[apple/xnu.git] / tools / tests / jitter / cpu_number.s

.text
/*
 * Taken from Libc
 */
.globl _cpu_number
_cpu_number:
#if defined(__x86_64__)
        push    %rbp
        mov     %rsp,%rbp
        sub     $16,%rsp                // space to read IDTR

        sidt    (%rsp)                  // store limit:base on stack
        movw    (%rsp), %ax             // get limit
        and     $0xfff, %rax            // mask off lower 12 bits to return

        mov     %rbp,%rsp
        pop     %rbp
        ret
#elif defined(__i386__)
        push    %ebp
	mov     %esp,%ebp
	sub     $8, %esp                // space to read IDTR

	sidt    (%esp)                  // store limit:base on stack
	movw    (%esp), %ax             // get limit
	and     $0xfff, %eax            // mask off lower 12 bits to return
	
	mov     %ebp,%esp
	pop     %ebp
	ret
#else
#error Unsupported architecture
#endif
Commit	Line	Data
6d2010ae A	1	.text
	2	/*
	3	* Taken from Libc
	4	*/
	5	.globl _cpu_number
	6	_cpu_number:
	7	#if defined(__x86_64__)
	8	push %rbp
	9	mov %rsp,%rbp
	10	sub $16,%rsp // space to read IDTR
	11
	12	sidt (%rsp) // store limit:base on stack
39236c6e	13	movw (%rsp), %ax // get limit
6d2010ae A	14	and $0xfff, %rax // mask off lower 12 bits to return
	15
	16	mov %rbp,%rsp
	17	pop %rbp
	18	ret
	19	#elif defined(__i386__)
	20	push %ebp
	21	mov %esp,%ebp
	22	sub $8, %esp // space to read IDTR
	23
	24	sidt (%esp) // store limit:base on stack
	25	movw (%esp), %ax // get limit
	26	and $0xfff, %eax // mask off lower 12 bits to return
	27
	28	mov %ebp,%esp
	29	pop %ebp
	30	ret
	31	#else
	32	#error Unsupported architecture
	33	#endif