| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | #include <linux/types.h> |
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| 3 | #include <linux/errno.h> |
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| 4 | #include <linux/uaccess.h> |
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| 5 | |
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| 6 | #include <asm/sfp-machine.h> |
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| 7 | #include <math-emu/soft-fp.h> |
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| 8 | #include <math-emu/double.h> |
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| 9 | |
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| 10 | int |
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| 11 | fsub(void *frD, void *frA, void *frB) |
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| 12 | { |
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| 13 | FP_DECL_D(A); |
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| 14 | FP_DECL_D(B); |
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| 15 | FP_DECL_D(R); |
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| 16 | FP_DECL_EX; |
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| 17 | |
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| 18 | #ifdef DEBUG |
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| 19 | printk("%s: %p %p %p\n" , __func__, frD, frA, frB); |
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| 20 | #endif |
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| 21 | |
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| 22 | FP_UNPACK_DP(A, frA); |
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| 23 | FP_UNPACK_DP(B, frB); |
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| 24 | |
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| 25 | #ifdef DEBUG |
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| 26 | printk("A: %ld %lu %lu %ld (%ld)\n" , A_s, A_f1, A_f0, A_e, A_c); |
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| 27 | printk("B: %ld %lu %lu %ld (%ld)\n" , B_s, B_f1, B_f0, B_e, B_c); |
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| 28 | #endif |
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| 29 | |
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| 30 | if (B_c != FP_CLS_NAN) |
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| 31 | B_s ^= 1; |
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| 32 | |
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| 33 | if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF) |
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| 34 | FP_SET_EXCEPTION(EFLAG_VXISI); |
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| 35 | |
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| 36 | FP_ADD_D(R, A, B); |
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| 37 | |
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| 38 | #ifdef DEBUG |
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| 39 | printk("D: %ld %lu %lu %ld (%ld)\n" , R_s, R_f1, R_f0, R_e, R_c); |
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| 40 | #endif |
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| 41 | |
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| 42 | __FP_PACK_D(frD, R); |
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| 43 | |
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| 44 | return FP_CUR_EXCEPTIONS; |
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| 45 | } |
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| 46 | |
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