[mirror_ubuntu-bionic-kernel.git] / arch / powerpc / math-emu / fcmpo.c

#include <linux/types.h>
#include <linux/errno.h>
#include <linux/uaccess.h>

#include <asm/sfp-machine.h>
#include <math-emu/soft-fp.h>
#include <math-emu/double.h>

int
fcmpo(u32 *ccr, int crfD, void *frA, void *frB)
{
	FP_DECL_D(A);
	FP_DECL_D(B);
	FP_DECL_EX;
	int code[4] = { (1 << 3), (1 << 1), (1 << 2), (1 << 0) };
	long cmp;

#ifdef DEBUG
	printk("%s: %p (%08x) %d %p %p\n", __func__, ccr, *ccr, crfD, frA, frB);
#endif

	FP_UNPACK_DP(A, frA);
	FP_UNPACK_DP(B, frB);

#ifdef DEBUG
	printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
	printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
#endif

	if (A_c == FP_CLS_NAN || B_c == FP_CLS_NAN)
		FP_SET_EXCEPTION(EFLAG_VXVC);

	FP_CMP_D(cmp, A, B, 2);
	cmp = code[(cmp + 1) & 3];

	__FPU_FPSCR &= ~(0x1f000);
	__FPU_FPSCR |= (cmp << 12);

	*ccr &= ~(15 << ((7 - crfD) << 2));
	*ccr |= (cmp << ((7 - crfD) << 2));

#ifdef DEBUG
	printk("CR: %08x\n", *ccr);
#endif

	return FP_CUR_EXCEPTIONS;
}
Commit	Line	Data
1da177e4 LT	1	#include <linux/types.h>
1da177e4 LT	2	#include <linux/errno.h>
7c0f6ba6	3	#include <linux/uaccess.h>
1da177e4	4
d2b194ed KG	5	#include <asm/sfp-machine.h>
	6	#include <math-emu/soft-fp.h>
	7	#include <math-emu/double.h>
1da177e4 LT	8
	9	int
	10	fcmpo(u32 ccr, int crfD, void frA, void *frB)
	11	{
	12	FP_DECL_D(A);
	13	FP_DECL_D(B);
d2b194ed	14	FP_DECL_EX;
1da177e4 LT	15	int code[4] = { (1 << 3), (1 << 1), (1 << 2), (1 << 0) };
1da177e4 LT	16	long cmp;
1da177e4 LT	17
1da177e4 LT	18	#ifdef DEBUG
e48b1b45	19	printk("%s: %p (%08x) %d %p %p\n", __func__, ccr, *ccr, crfD, frA, frB);
1da177e4 LT	20	#endif
1da177e4 LT	21
d2b194ed KG	22	FP_UNPACK_DP(A, frA);
d2b194ed KG	23	FP_UNPACK_DP(B, frB);
1da177e4 LT	24
	25	#ifdef DEBUG
	26	printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
	27	printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
	28	#endif
	29
	30	if (A_c == FP_CLS_NAN \|\| B_c == FP_CLS_NAN)
033b8a33	31	FP_SET_EXCEPTION(EFLAG_VXVC);
1da177e4 LT	32
	33	FP_CMP_D(cmp, A, B, 2);
	34	cmp = code[(cmp + 1) & 3];
	35
	36	__FPU_FPSCR &= ~(0x1f000);
	37	__FPU_FPSCR \|= (cmp << 12);
	38
	39	*ccr &= ~(15 << ((7 - crfD) << 2));
	40	*ccr \|= (cmp << ((7 - crfD) << 2));
	41
	42	#ifdef DEBUG
	43	printk("CR: %08x\n", *ccr);
	44	#endif
	45
033b8a33	46	return FP_CUR_EXCEPTIONS;
1da177e4	47	}