| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | #include <linux/types.h> |
| 2 | #include <linux/errno.h> |
| 3 | #include <asm/uaccess.h> |
| 4 | |
| 5 | #include "soft-fp.h" |
| 6 | #include "double.h" |
| 7 | #include "single.h" |
| 8 | |
| 9 | int |
| 10 | fnmadds(void *frD, void *frA, void *frB, void *frC) |
| 11 | { |
| 12 | FP_DECL_D(R); |
| 13 | FP_DECL_D(A); |
| 14 | FP_DECL_D(B); |
| 15 | FP_DECL_D(C); |
| 16 | FP_DECL_D(T); |
| 17 | int ret = 0; |
| 18 | |
| 19 | #ifdef DEBUG |
| 20 | printk("%s: %p %p %p %p\n", __FUNCTION__, frD, frA, frB, frC); |
| 21 | #endif |
| 22 | |
| 23 | __FP_UNPACK_D(A, frA); |
| 24 | __FP_UNPACK_D(B, frB); |
| 25 | __FP_UNPACK_D(C, frC); |
| 26 | |
| 27 | #ifdef DEBUG |
| 28 | printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c); |
| 29 | printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c); |
| 30 | printk("C: %ld %lu %lu %ld (%ld)\n", C_s, C_f1, C_f0, C_e, C_c); |
| 31 | #endif |
| 32 | |
| 33 | if ((A_c == FP_CLS_INF && C_c == FP_CLS_ZERO) || |
| 34 | (A_c == FP_CLS_ZERO && C_c == FP_CLS_INF)) |
| 35 | ret |= EFLAG_VXIMZ; |
| 36 | |
| 37 | FP_MUL_D(T, A, C); |
| 38 | |
| 39 | if (T_s != B_s && T_c == FP_CLS_INF && B_c == FP_CLS_INF) |
| 40 | ret |= EFLAG_VXISI; |
| 41 | |
| 42 | FP_ADD_D(R, T, B); |
| 43 | |
| 44 | if (R_c != FP_CLS_NAN) |
| 45 | R_s ^= 1; |
| 46 | |
| 47 | #ifdef DEBUG |
| 48 | printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c); |
| 49 | #endif |
| 50 | |
| 51 | return (ret | __FP_PACK_DS(frD, R)); |
| 52 | } |