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 9 int mtfsf(unsigned int FM,u32 * frB)10mtfsf(unsigned int FM, u32 *frB) 11 { 12 u32 mask; 13 u32 fpscr; 14 15 if (likely(FM == 1)) 16 mask = 0x0f; 17 else if (likely(FM == 0xff)) 18 mask = ~0; 19 else { 20 mask = ((FM & 1) | 21 ((FM << 3) & 0x10) | 22 ((FM << 6) & 0x100) | 23 ((FM << 9) & 0x1000) | 24 ((FM << 12) & 0x10000) | 25 ((FM << 15) & 0x100000) | 26 ((FM << 18) & 0x1000000) | 27 ((FM << 21) & 0x10000000)) * 15; 28 } 29 30 fpscr = ((__FPU_FPSCR & ~mask) | (frB[1] & mask)) & 31 ~(FPSCR_VX | FPSCR_FEX | 0x800); 32 33 if (fpscr & (FPSCR_VXSNAN | FPSCR_VXISI | FPSCR_VXIDI | 34 FPSCR_VXZDZ | FPSCR_VXIMZ | FPSCR_VXVC | 35 FPSCR_VXSOFT | FPSCR_VXSQRT | FPSCR_VXCVI)) 36 fpscr |= FPSCR_VX; 37 38 /* The bit order of exception enables and exception status 39 * is the same. Simply shift and mask to check for enabled 40 * exceptions. 41 */ 42 if (fpscr & (fpscr >> 22) & 0xf8) 43 fpscr |= FPSCR_FEX; 44 45 __FPU_FPSCR = fpscr; 46 47 #ifdef DEBUG 48 printk("%s: %02x %p: %08lx\n", __func__, FM, frB, __FPU_FPSCR); 49 #endif 50 51 return 0; 52 } 53