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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/powerpc/math-emu/fdivs.c
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// SPDX-License-Identifier: GPL-2.0

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#include <linux/types.h>

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#include <linux/errno.h>

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#include <linux/uaccess.h>

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#include <asm/sfp-machine.h>

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#include <math-emu/soft-fp.h>

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#include <math-emu/double.h>

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#include <math-emu/single.h>

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int

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fdivs(void *frD, void *frA, void *frB)

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{

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	FP_DECL_D(A);

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	FP_DECL_D(B);

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	FP_DECL_D(R);

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	FP_DECL_EX;

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#ifdef DEBUG

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	printk("%s: %p %p %p\n", __func__, frD, frA, frB);

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#endif

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	FP_UNPACK_DP(A, frA);

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	FP_UNPACK_DP(B, frB);

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#ifdef DEBUG

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	printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);

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	printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);

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#endif

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	if (A_c == FP_CLS_ZERO && B_c == FP_CLS_ZERO) {

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		FP_SET_EXCEPTION(EFLAG_VXZDZ);

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#ifdef DEBUG

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		printk("%s: FPSCR_VXZDZ raised\n", __func__);

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#endif

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	}

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	if (A_c == FP_CLS_INF && B_c == FP_CLS_INF) {

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		FP_SET_EXCEPTION(EFLAG_VXIDI);

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#ifdef DEBUG

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		printk("%s: FPSCR_VXIDI raised\n", __func__);

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#endif

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	}

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	if (B_c == FP_CLS_ZERO && A_c != FP_CLS_ZERO) {

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		FP_SET_EXCEPTION(EFLAG_DIVZERO);

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		if (__FPU_TRAP_P(EFLAG_DIVZERO))

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			return FP_CUR_EXCEPTIONS;

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	}

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	FP_DIV_D(R, A, B);

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#ifdef DEBUG

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

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#endif

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	__FP_PACK_DS(frD, R);

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	return FP_CUR_EXCEPTIONS;

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}

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