1*4882a593Smuzhiyun/* fls64.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 mov -1, %g2 16*4882a593Smuzhiyun sllx %g2, 32, %g2 17*4882a593Smuzhiyun and %o0, %g2, %g2 18*4882a593Smuzhiyun brnz,pt %g2, 1f 19*4882a593Smuzhiyun mov 63, %g1 20*4882a593Smuzhiyun sllx %o0, 32, %o0 21*4882a593Smuzhiyun mov 31, %g1 22*4882a593Smuzhiyun1: 23*4882a593Smuzhiyun mov -1, %g2 24*4882a593Smuzhiyun sllx %g2, 48, %g2 25*4882a593Smuzhiyun and %o0, %g2, %g2 26*4882a593Smuzhiyun brnz,pt %g2, 2f 27*4882a593Smuzhiyun mov -1, %g2 28*4882a593Smuzhiyun sllx %o0, 16, %o0 29*4882a593Smuzhiyun add %g1, -16, %g1 30*4882a593Smuzhiyun2: 31*4882a593Smuzhiyun mov -1, %g2 32*4882a593Smuzhiyun sllx %g2, 56, %g2 33*4882a593Smuzhiyun and %o0, %g2, %g2 34*4882a593Smuzhiyun brnz,pt %g2, 3f 35*4882a593Smuzhiyun mov -1, %g2 36*4882a593Smuzhiyun sllx %o0, 8, %o0 37*4882a593Smuzhiyun add %g1, -8, %g1 38*4882a593Smuzhiyun3: 39*4882a593Smuzhiyun sllx %g2, 60, %g2 40*4882a593Smuzhiyun and %o0, %g2, %g2 41*4882a593Smuzhiyun brnz,pt %g2, 4f 42*4882a593Smuzhiyun mov -1, %g2 43*4882a593Smuzhiyun sllx %o0, 4, %o0 44*4882a593Smuzhiyun add %g1, -4, %g1 45*4882a593Smuzhiyun4: 46*4882a593Smuzhiyun sllx %g2, 62, %g2 47*4882a593Smuzhiyun and %o0, %g2, %g2 48*4882a593Smuzhiyun brnz,pt %g2, 5f 49*4882a593Smuzhiyun mov -1, %g3 50*4882a593Smuzhiyun sllx %o0, 2, %o0 51*4882a593Smuzhiyun add %g1, -2, %g1 52*4882a593Smuzhiyun5: 53*4882a593Smuzhiyun mov 0, %g2 54*4882a593Smuzhiyun sllx %g3, 63, %g3 55*4882a593Smuzhiyun and %o0, %g3, %o0 56*4882a593Smuzhiyun movre %o0, 1, %g2 57*4882a593Smuzhiyun sub %g1, %g2, %g1 58*4882a593Smuzhiyun jmp %o7+8 59*4882a593Smuzhiyun sra %g1, 0, %o0 60*4882a593SmuzhiyunENDPROC(__fls) 61*4882a593SmuzhiyunEXPORT_SYMBOL(__fls) 62