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45 lines
869 B
45 lines
869 B
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/types.h> |
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#include <linux/errno.h> |
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#include <linux/uaccess.h> |
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#include <asm/sfp-machine.h> |
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#include <math-emu/soft-fp.h> |
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#include <math-emu/double.h> |
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int |
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fsub(void *frD, void *frA, void *frB) |
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{ |
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FP_DECL_D(A); |
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FP_DECL_D(B); |
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FP_DECL_D(R); |
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FP_DECL_EX; |
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#ifdef DEBUG |
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printk("%s: %p %p %p\n", __func__, frD, frA, frB); |
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#endif |
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FP_UNPACK_DP(A, frA); |
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FP_UNPACK_DP(B, frB); |
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#ifdef DEBUG |
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printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c); |
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printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c); |
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#endif |
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if (B_c != FP_CLS_NAN) |
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B_s ^= 1; |
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if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF) |
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FP_SET_EXCEPTION(EFLAG_VXISI); |
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FP_ADD_D(R, A, B); |
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#ifdef DEBUG |
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printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c); |
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#endif |
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__FP_PACK_D(frD, R); |
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return FP_CUR_EXCEPTIONS; |
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}
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