162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci#include <linux/types.h> 362306a36Sopenharmony_ci#include <linux/errno.h> 462306a36Sopenharmony_ci#include <linux/uaccess.h> 562306a36Sopenharmony_ci 662306a36Sopenharmony_ci#include <asm/sfp-machine.h> 762306a36Sopenharmony_ci#include <math-emu/soft-fp.h> 862306a36Sopenharmony_ci 962306a36Sopenharmony_ciint 1062306a36Sopenharmony_cimtfsf(unsigned int FM, u32 *frB) 1162306a36Sopenharmony_ci{ 1262306a36Sopenharmony_ci u32 mask; 1362306a36Sopenharmony_ci u32 fpscr; 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ci if (likely(FM == 1)) 1662306a36Sopenharmony_ci mask = 0x0f; 1762306a36Sopenharmony_ci else if (likely(FM == 0xff)) 1862306a36Sopenharmony_ci mask = ~0; 1962306a36Sopenharmony_ci else { 2062306a36Sopenharmony_ci mask = ((FM & 1) | 2162306a36Sopenharmony_ci ((FM << 3) & 0x10) | 2262306a36Sopenharmony_ci ((FM << 6) & 0x100) | 2362306a36Sopenharmony_ci ((FM << 9) & 0x1000) | 2462306a36Sopenharmony_ci ((FM << 12) & 0x10000) | 2562306a36Sopenharmony_ci ((FM << 15) & 0x100000) | 2662306a36Sopenharmony_ci ((FM << 18) & 0x1000000) | 2762306a36Sopenharmony_ci ((FM << 21) & 0x10000000)) * 15; 2862306a36Sopenharmony_ci } 2962306a36Sopenharmony_ci 3062306a36Sopenharmony_ci fpscr = ((__FPU_FPSCR & ~mask) | (frB[1] & mask)) & 3162306a36Sopenharmony_ci ~(FPSCR_VX | FPSCR_FEX | 0x800); 3262306a36Sopenharmony_ci 3362306a36Sopenharmony_ci if (fpscr & (FPSCR_VXSNAN | FPSCR_VXISI | FPSCR_VXIDI | 3462306a36Sopenharmony_ci FPSCR_VXZDZ | FPSCR_VXIMZ | FPSCR_VXVC | 3562306a36Sopenharmony_ci FPSCR_VXSOFT | FPSCR_VXSQRT | FPSCR_VXCVI)) 3662306a36Sopenharmony_ci fpscr |= FPSCR_VX; 3762306a36Sopenharmony_ci 3862306a36Sopenharmony_ci /* The bit order of exception enables and exception status 3962306a36Sopenharmony_ci * is the same. Simply shift and mask to check for enabled 4062306a36Sopenharmony_ci * exceptions. 4162306a36Sopenharmony_ci */ 4262306a36Sopenharmony_ci if (fpscr & (fpscr >> 22) & 0xf8) 4362306a36Sopenharmony_ci fpscr |= FPSCR_FEX; 4462306a36Sopenharmony_ci 4562306a36Sopenharmony_ci __FPU_FPSCR = fpscr; 4662306a36Sopenharmony_ci 4762306a36Sopenharmony_ci#ifdef DEBUG 4862306a36Sopenharmony_ci printk("%s: %02x %p: %08lx\n", __func__, FM, frB, __FPU_FPSCR); 4962306a36Sopenharmony_ci#endif 5062306a36Sopenharmony_ci 5162306a36Sopenharmony_ci return 0; 5262306a36Sopenharmony_ci} 53