| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame] | 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 | fdiv(void *frD, void *frA, void *frB) |
| 12 | { |
| 13 | FP_DECL_D(A); |
| 14 | FP_DECL_D(B); |
| 15 | FP_DECL_D(R); |
| 16 | FP_DECL_EX; |
| 17 | |
| 18 | #ifdef DEBUG |
| 19 | printk("%s: %p %p %p\n", __func__, frD, frA, frB); |
| 20 | #endif |
| 21 | |
| 22 | FP_UNPACK_DP(A, frA); |
| 23 | FP_UNPACK_DP(B, frB); |
| 24 | |
| 25 | #ifdef DEBUG |
| 26 | printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c); |
| 27 | printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c); |
| 28 | #endif |
| 29 | |
| 30 | if (A_c == FP_CLS_ZERO && B_c == FP_CLS_ZERO) { |
| 31 | FP_SET_EXCEPTION(EFLAG_VXZDZ); |
| 32 | #ifdef DEBUG |
| 33 | printk("%s: FPSCR_VXZDZ raised\n", __func__); |
| 34 | #endif |
| 35 | } |
| 36 | if (A_c == FP_CLS_INF && B_c == FP_CLS_INF) { |
| 37 | FP_SET_EXCEPTION(EFLAG_VXIDI); |
| 38 | #ifdef DEBUG |
| 39 | printk("%s: FPSCR_VXIDI raised\n", __func__); |
| 40 | #endif |
| 41 | } |
| 42 | |
| 43 | if (B_c == FP_CLS_ZERO && A_c != FP_CLS_ZERO) { |
| 44 | FP_SET_EXCEPTION(EFLAG_DIVZERO); |
| 45 | if (__FPU_TRAP_P(EFLAG_DIVZERO)) |
| 46 | return FP_CUR_EXCEPTIONS; |
| 47 | } |
| 48 | FP_DIV_D(R, A, B); |
| 49 | |
| 50 | #ifdef DEBUG |
| 51 | printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c); |
| 52 | #endif |
| 53 | |
| 54 | __FP_PACK_D(frD, R); |
| 55 | |
| 56 | return FP_CUR_EXCEPTIONS; |
| 57 | } |