PageRenderTime 40ms CodeModel.GetById 33ms app.highlight 5ms RepoModel.GetById 1ms app.codeStats 0ms

/arch/powerpc/math-emu/fmul.c

http://github.com/mirrors/linux
C | 46 lines | 35 code | 10 blank | 1 comment | 7 complexity | fb1cd3e28d3399b3cd0ed71f2e7c2658 MD5 | raw file
 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
10int
11fmul(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) [%08lx.%08lx %lx]\n",
27	       A_s, A_f1, A_f0, A_e, A_c, A_f1, A_f0, A_e + 1023);
28	printk("B: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
29	       B_s, B_f1, B_f0, B_e, B_c, B_f1, B_f0, B_e + 1023);
30#endif
31
32	if ((A_c == FP_CLS_INF && B_c == FP_CLS_ZERO) ||
33	    (A_c == FP_CLS_ZERO && B_c == FP_CLS_INF))
34		FP_SET_EXCEPTION(EFLAG_VXIMZ);
35
36	FP_MUL_D(R, A, B);
37
38#ifdef DEBUG
39	printk("D: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
40	       R_s, R_f1, R_f0, R_e, R_c, R_f1, R_f0, R_e + 1023);
41#endif
42
43	__FP_PACK_D(frD, R);
44
45	return FP_CUR_EXCEPTIONS;
46}