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/arch/ppc/math-emu/fcmpu.c

https://bitbucket.org/evzijst/gittest
C | 42 lines | 32 code | 10 blank | 0 comment | 0 complexity | c8490b9e36088cff2556b4676b01d0cf MD5 | raw file
 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
 8int
 9fcmpu(u32 *ccr, int crfD, void *frA, void *frB)
10{
11	FP_DECL_D(A);
12	FP_DECL_D(B);
13	int code[4] = { (1 << 3), (1 << 1), (1 << 2), (1 << 0) };
14	long cmp;
15
16#ifdef DEBUG
17	printk("%s: %p (%08x) %d %p %p\n", __FUNCTION__, ccr, *ccr, crfD, frA, frB);
18#endif
19
20	__FP_UNPACK_D(A, frA);
21	__FP_UNPACK_D(B, frB);
22
23#ifdef DEBUG
24	printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
25	printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
26#endif
27
28	FP_CMP_D(cmp, A, B, 2);
29	cmp = code[(cmp + 1) & 3];
30
31	__FPU_FPSCR &= ~(0x1f000);
32	__FPU_FPSCR |= (cmp << 12);
33
34	*ccr &= ~(15 << ((7 - crfD) << 2));
35	*ccr |= (cmp << ((7 - crfD) << 2));
36
37#ifdef DEBUG
38	printk("CR: %08x\n", *ccr);
39#endif
40
41	return 0;
42}