1*4882a593Smuzhiyun/* fls.S: SPARC default fls definition. 2*4882a593Smuzhiyun * 3*4882a593Smuzhiyun * SPARC default fls definition, which follows the same algorithm as 4*4882a593Smuzhiyun * in generic fls(). This function will be boot time patched on T4 5*4882a593Smuzhiyun * and onward. 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun#include <linux/linkage.h> 9*4882a593Smuzhiyun#include <asm/export.h> 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun .text 12*4882a593Smuzhiyun .register %g2, #scratch 13*4882a593Smuzhiyun .register %g3, #scratch 14*4882a593SmuzhiyunENTRY(fls) 15*4882a593Smuzhiyun brz,pn %o0, 6f 16*4882a593Smuzhiyun mov 0, %o1 17*4882a593Smuzhiyun sethi %hi(0xffff0000), %g3 18*4882a593Smuzhiyun mov %o0, %g2 19*4882a593Smuzhiyun andcc %o0, %g3, %g0 20*4882a593Smuzhiyun be,pt %icc, 8f 21*4882a593Smuzhiyun mov 32, %o1 22*4882a593Smuzhiyun sethi %hi(0xff000000), %g3 23*4882a593Smuzhiyun andcc %g2, %g3, %g0 24*4882a593Smuzhiyun bne,pt %icc, 3f 25*4882a593Smuzhiyun sethi %hi(0xf0000000), %g3 26*4882a593Smuzhiyun sll %o0, 8, %o0 27*4882a593Smuzhiyun1: 28*4882a593Smuzhiyun add %o1, -8, %o1 29*4882a593Smuzhiyun sra %o0, 0, %o0 30*4882a593Smuzhiyun mov %o0, %g2 31*4882a593Smuzhiyun2: 32*4882a593Smuzhiyun sethi %hi(0xf0000000), %g3 33*4882a593Smuzhiyun3: 34*4882a593Smuzhiyun andcc %g2, %g3, %g0 35*4882a593Smuzhiyun bne,pt %icc, 4f 36*4882a593Smuzhiyun sethi %hi(0xc0000000), %g3 37*4882a593Smuzhiyun sll %o0, 4, %o0 38*4882a593Smuzhiyun add %o1, -4, %o1 39*4882a593Smuzhiyun sra %o0, 0, %o0 40*4882a593Smuzhiyun mov %o0, %g2 41*4882a593Smuzhiyun4: 42*4882a593Smuzhiyun andcc %g2, %g3, %g0 43*4882a593Smuzhiyun be,a,pt %icc, 7f 44*4882a593Smuzhiyun sll %o0, 2, %o0 45*4882a593Smuzhiyun5: 46*4882a593Smuzhiyun xnor %g0, %o0, %o0 47*4882a593Smuzhiyun srl %o0, 31, %o0 48*4882a593Smuzhiyun sub %o1, %o0, %o1 49*4882a593Smuzhiyun6: 50*4882a593Smuzhiyun jmp %o7 + 8 51*4882a593Smuzhiyun sra %o1, 0, %o0 52*4882a593Smuzhiyun7: 53*4882a593Smuzhiyun add %o1, -2, %o1 54*4882a593Smuzhiyun ba,pt %xcc, 5b 55*4882a593Smuzhiyun sra %o0, 0, %o0 56*4882a593Smuzhiyun8: 57*4882a593Smuzhiyun sll %o0, 16, %o0 58*4882a593Smuzhiyun sethi %hi(0xff000000), %g3 59*4882a593Smuzhiyun sra %o0, 0, %o0 60*4882a593Smuzhiyun mov %o0, %g2 61*4882a593Smuzhiyun andcc %g2, %g3, %g0 62*4882a593Smuzhiyun bne,pt %icc, 2b 63*4882a593Smuzhiyun mov 16, %o1 64*4882a593Smuzhiyun ba,pt %xcc, 1b 65*4882a593Smuzhiyun sll %o0, 8, %o0 66*4882a593SmuzhiyunENDPROC(fls) 67*4882a593SmuzhiyunEXPORT_SYMBOL(fls) 68