[mirror_ubuntu-bionic-kernel.git] / arch / powerpc / math-emu / fdiv.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
fdiv(void *frD, void *frA, void *frB)
{
	FP_DECL_D(A);
	FP_DECL_D(B);
	FP_DECL_D(R);
	FP_DECL_EX;

#ifdef DEBUG
	printk("%s: %p %p %p\n", __func__, frD, 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_ZERO && B_c == FP_CLS_ZERO) {
		FP_SET_EXCEPTION(EFLAG_VXZDZ);
#ifdef DEBUG
		printk("%s: FPSCR_VXZDZ raised\n", __func__);
#endif
	}
	if (A_c == FP_CLS_INF && B_c == FP_CLS_INF) {
		FP_SET_EXCEPTION(EFLAG_VXIDI);
#ifdef DEBUG
		printk("%s: FPSCR_VXIDI raised\n", __func__);
#endif
	}

	if (B_c == FP_CLS_ZERO && A_c != FP_CLS_ZERO) {
		FP_SET_EXCEPTION(EFLAG_DIVZERO);
		if (__FPU_TRAP_P(EFLAG_DIVZERO))
			return FP_CUR_EXCEPTIONS;
	}
	FP_DIV_D(R, A, B);

#ifdef DEBUG
	printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
#endif

	__FP_PACK_D(frD, R);

	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	fdiv(void frD, void frA, void *frB)
	11	{
	12	FP_DECL_D(A);
	13	FP_DECL_D(B);
	14	FP_DECL_D(R);
d2b194ed	15	FP_DECL_EX;
1da177e4 LT	16
1da177e4 LT	17	#ifdef DEBUG
e48b1b45	18	printk("%s: %p %p %p\n", __func__, frD, frA, frB);
1da177e4 LT	19	#endif
1da177e4 LT	20
d2b194ed KG	21	FP_UNPACK_DP(A, frA);
d2b194ed KG	22	FP_UNPACK_DP(B, frB);
1da177e4 LT	23
	24	#ifdef DEBUG
	25	printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
	26	printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
	27	#endif
	28
	29	if (A_c == FP_CLS_ZERO && B_c == FP_CLS_ZERO) {
033b8a33	30	FP_SET_EXCEPTION(EFLAG_VXZDZ);
1da177e4	31	#ifdef DEBUG
e48b1b45	32	printk("%s: FPSCR_VXZDZ raised\n", __func__);
1da177e4 LT	33	#endif
	34	}
	35	if (A_c == FP_CLS_INF && B_c == FP_CLS_INF) {
033b8a33	36	FP_SET_EXCEPTION(EFLAG_VXIDI);
1da177e4	37	#ifdef DEBUG
e48b1b45	38	printk("%s: FPSCR_VXIDI raised\n", __func__);
1da177e4 LT	39	#endif
	40	}
	41
	42	if (B_c == FP_CLS_ZERO && A_c != FP_CLS_ZERO) {
033b8a33	43	FP_SET_EXCEPTION(EFLAG_DIVZERO);
1da177e4	44	if (__FPU_TRAP_P(EFLAG_DIVZERO))
033b8a33	45	return FP_CUR_EXCEPTIONS;
1da177e4 LT	46	}
	47	FP_DIV_D(R, A, B);
	48
	49	#ifdef DEBUG
	50	printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
	51	#endif
	52
d2b194ed KG	53	__FP_PACK_D(frD, R);
	54
	55	return FP_CUR_EXCEPTIONS;
1da177e4	56	}