#include <linux/types.h> #include <linux/errno.h> #include <asm/uaccess.h> #include <asm/sfp-machine.h> #include <math-emu/soft-fp.h> int mtfsf(unsigned int FM, u32 *frB) { u32 mask; u32 fpscr; if (likely(FM == 1)) mask = 0x0f; else if (likely(FM == 0xff)) mask = ~0; else { mask = ((FM & 1) | ((FM << 3) & 0x10) | ((FM << 6) & 0x100) | ((FM << 9) & 0x1000) | ((FM << 12) & 0x10000) | ((FM << 15) & 0x100000) | ((FM << 18) & 0x1000000) | ((FM << 21) & 0x10000000)) * 15; } fpscr = ((__FPU_FPSCR & ~mask) | (frB[1] & mask)) & ~(FPSCR_VX | FPSCR_FEX | 0x800); if (fpscr & (FPSCR_VXSNAN | FPSCR_VXISI | FPSCR_VXIDI | FPSCR_VXZDZ | FPSCR_VXIMZ | FPSCR_VXVC | FPSCR_VXSOFT | FPSCR_VXSQRT | FPSCR_VXCVI)) fpscr |= FPSCR_VX; /* The bit order of exception enables and exception status * is the same. Simply shift and mask to check for enabled * exceptions. */ if (fpscr & (fpscr >> 22) & 0xf8) fpscr |= FPSCR_FEX; __FPU_FPSCR = fpscr; #ifdef DEBUG printk("%s: %02x %p: %08lx\n", __func__, FM, frB, __FPU_FPSCR); #endif return 0; }