code: 9ferno

ref: 57446af9a447c3a81414131f2407a9ca6f6a1a94
dir: /emu/Linux/asm-spim.S/

View raw version 
#include <sys/asm.h>
#include <sys/regdef.h>
#include <asm/cachectl.h>


LEAF(FPsave)
	cfc1	t0, $31
	sw	t0, 0(a0)		/* a0 is argument */
	j	$31
	END(FPsave)

LEAF(FPrestore)
	lw	t0, 0(a0)		/* a0 is argument */
	ctc1	t0, $31
	j	$31
	END(FPrestore)

LEAF(_tas)
	.set 	noreorder
1:
	ll	v0,0(a0)		/* a0 is argument */
	or	t1, v0, 1
	sc	t1,0(a0)
	beq	t1,zero,1b	
	nop
	j	$31			/* lock held */
	nop
	.set 	reorder
	END(_tas)