powerpc/math-emu/fmuls.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 #include <linux/types.h>
0003 #include <linux/errno.h>
0004 #include <linux/uaccess.h>
0005
0006 #include <asm/sfp-machine.h>
0007 #include <math-emu/soft-fp.h>
0008 #include <math-emu/double.h>
0009 #include <math-emu/single.h>
0010
0011 int
0012 fmuls(void *frD, void *frA, void *frB)
0013 {
0014     FP_DECL_D(A);
0015     FP_DECL_D(B);
0016     FP_DECL_D(R);
0017     FP_DECL_EX;
0018
0019 #ifdef DEBUG
0020     printk("%s: %p %p %p\n", __func__, frD, frA, frB);
0021 #endif
0022
0023     FP_UNPACK_DP(A, frA);
0024     FP_UNPACK_DP(B, frB);
0025
0026 #ifdef DEBUG
0027     printk("A: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
0028            A_s, A_f1, A_f0, A_e, A_c, A_f1, A_f0, A_e + 1023);
0029     printk("B: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
0030            B_s, B_f1, B_f0, B_e, B_c, B_f1, B_f0, B_e + 1023);
0031 #endif
0032
0033     if ((A_c == FP_CLS_INF && B_c == FP_CLS_ZERO) ||
0034         (A_c == FP_CLS_ZERO && B_c == FP_CLS_INF))
0035         FP_SET_EXCEPTION(EFLAG_VXIMZ);
0036
0037     FP_MUL_D(R, A, B);
0038
0039 #ifdef DEBUG
0040     printk("D: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
0041            R_s, R_f1, R_f0, R_e, R_c, R_f1, R_f0, R_e + 1023);
0042 #endif
0043
0044     __FP_PACK_DS(frD, R);
0045
0046     return FP_CUR_EXCEPTIONS;
0047 }