xref: /openbmc/linux/arch/powerpc/math-emu/fsel.c (revision 22246614)
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 
8 int
9 fsel(u32 *frD, void *frA, u32 *frB, u32 *frC)
10 {
11 	FP_DECL_D(A);
12 
13 #ifdef DEBUG
14 	printk("%s: %p %p %p %p\n", __func__, frD, frA, frB, frC);
15 #endif
16 
17 	__FP_UNPACK_D(A, frA);
18 
19 #ifdef DEBUG
20 	printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
21 	printk("B: %08x %08x\n", frB[0], frB[1]);
22 	printk("C: %08x %08x\n", frC[0], frC[1]);
23 #endif
24 
25 	if (A_c == FP_CLS_NAN || (A_c != FP_CLS_ZERO && A_s)) {
26 		frD[0] = frB[0];
27 		frD[1] = frB[1];
28 	} else {
29 		frD[0] = frC[0];
30 		frD[1] = frC[1];
31 	}
32 
33 #ifdef DEBUG
34 	printk("D: %08x.%08x\n", frD[0], frD[1]);
35 #endif
36 
37 	return 0;
38 }
39