18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 28c2ecf20Sopenharmony_ci#include <linux/types.h> 38c2ecf20Sopenharmony_ci#include <linux/errno.h> 48c2ecf20Sopenharmony_ci#include <linux/uaccess.h> 58c2ecf20Sopenharmony_ci 68c2ecf20Sopenharmony_ci#include <asm/sfp-machine.h> 78c2ecf20Sopenharmony_ci#include <math-emu/soft-fp.h> 88c2ecf20Sopenharmony_ci 98c2ecf20Sopenharmony_ciint 108c2ecf20Sopenharmony_cimtfsf(unsigned int FM, u32 *frB) 118c2ecf20Sopenharmony_ci{ 128c2ecf20Sopenharmony_ci u32 mask; 138c2ecf20Sopenharmony_ci u32 fpscr; 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_ci if (likely(FM == 1)) 168c2ecf20Sopenharmony_ci mask = 0x0f; 178c2ecf20Sopenharmony_ci else if (likely(FM == 0xff)) 188c2ecf20Sopenharmony_ci mask = ~0; 198c2ecf20Sopenharmony_ci else { 208c2ecf20Sopenharmony_ci mask = ((FM & 1) | 218c2ecf20Sopenharmony_ci ((FM << 3) & 0x10) | 228c2ecf20Sopenharmony_ci ((FM << 6) & 0x100) | 238c2ecf20Sopenharmony_ci ((FM << 9) & 0x1000) | 248c2ecf20Sopenharmony_ci ((FM << 12) & 0x10000) | 258c2ecf20Sopenharmony_ci ((FM << 15) & 0x100000) | 268c2ecf20Sopenharmony_ci ((FM << 18) & 0x1000000) | 278c2ecf20Sopenharmony_ci ((FM << 21) & 0x10000000)) * 15; 288c2ecf20Sopenharmony_ci } 298c2ecf20Sopenharmony_ci 308c2ecf20Sopenharmony_ci fpscr = ((__FPU_FPSCR & ~mask) | (frB[1] & mask)) & 318c2ecf20Sopenharmony_ci ~(FPSCR_VX | FPSCR_FEX | 0x800); 328c2ecf20Sopenharmony_ci 338c2ecf20Sopenharmony_ci if (fpscr & (FPSCR_VXSNAN | FPSCR_VXISI | FPSCR_VXIDI | 348c2ecf20Sopenharmony_ci FPSCR_VXZDZ | FPSCR_VXIMZ | FPSCR_VXVC | 358c2ecf20Sopenharmony_ci FPSCR_VXSOFT | FPSCR_VXSQRT | FPSCR_VXCVI)) 368c2ecf20Sopenharmony_ci fpscr |= FPSCR_VX; 378c2ecf20Sopenharmony_ci 388c2ecf20Sopenharmony_ci /* The bit order of exception enables and exception status 398c2ecf20Sopenharmony_ci * is the same. Simply shift and mask to check for enabled 408c2ecf20Sopenharmony_ci * exceptions. 418c2ecf20Sopenharmony_ci */ 428c2ecf20Sopenharmony_ci if (fpscr & (fpscr >> 22) & 0xf8) 438c2ecf20Sopenharmony_ci fpscr |= FPSCR_FEX; 448c2ecf20Sopenharmony_ci 458c2ecf20Sopenharmony_ci __FPU_FPSCR = fpscr; 468c2ecf20Sopenharmony_ci 478c2ecf20Sopenharmony_ci#ifdef DEBUG 488c2ecf20Sopenharmony_ci printk("%s: %02x %p: %08lx\n", __func__, FM, frB, __FPU_FPSCR); 498c2ecf20Sopenharmony_ci#endif 508c2ecf20Sopenharmony_ci 518c2ecf20Sopenharmony_ci return 0; 528c2ecf20Sopenharmony_ci} 53