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 fcmpo(u32 *ccr, int crfD, void *frA, void *frB) 12 { 13 FP_DECL_D(A); 14 FP_DECL_D(B); 15 FP_DECL_EX; 16 int code[4] = { (1 << 3), (1 << 1), (1 << 2), (1 << 0) }; 17 long cmp; 18 19 #ifdef DEBUG 20 printk("%s: %p (%08x) %d %p %p\n", __func__, ccr, *ccr, crfD, frA, frB); 21 #endif 22 23 FP_UNPACK_DP(A, frA); 24 FP_UNPACK_DP(B, frB); 25 26 #ifdef DEBUG 27 printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c); 28 printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c); 29 #endif 30 31 if (A_c == FP_CLS_NAN || B_c == FP_CLS_NAN) 32 FP_SET_EXCEPTION(EFLAG_VXVC); 33 34 FP_CMP_D(cmp, A, B, 2); 35 cmp = code[(cmp + 1) & 3]; 36 37 __FPU_FPSCR &= ~(0x1f000); 38 __FPU_FPSCR |= (cmp << 12); 39 40 *ccr &= ~(15 << ((7 - crfD) << 2)); 41 *ccr |= (cmp << ((7 - crfD) << 2)); 42 43 #ifdef DEBUG 44 printk("CR: %08x\n", *ccr); 45 #endif 46 47 return FP_CUR_EXCEPTIONS; 48 } 49