1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/types.h> 3 #include <linux/errno.h> 4 #include <linux/uaccess.h> 5 6 #include <asm/sfp-machine.h> 7 #include <math-emu/soft-fp.h> 8 #include <math-emu/double.h> 9 10 int 11 fsqrt(void *frD, void *frB) 12 { 13 FP_DECL_D(B); 14 FP_DECL_D(R); 15 FP_DECL_EX; 16 17 #ifdef DEBUG 18 printk("%s: %p %p %p %p\n", __func__, frD, frB); 19 #endif 20 21 FP_UNPACK_DP(B, frB); 22 23 #ifdef DEBUG 24 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c); 25 #endif 26 27 if (B_s && B_c != FP_CLS_ZERO) 28 FP_SET_EXCEPTION(EFLAG_VXSQRT); 29 if (B_c == FP_CLS_NAN) 30 FP_SET_EXCEPTION(EFLAG_VXSNAN); 31 32 FP_SQRT_D(R, B); 33 34 #ifdef DEBUG 35 printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c); 36 #endif 37 38 __FP_PACK_D(frD, R); 39 40 return FP_CUR_EXCEPTIONS; 41 } 42