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diff --git a/gcc-4.9/libgcc/config/bfin/lib1funcs.S b/gcc-4.9/libgcc/config/bfin/lib1funcs.S
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+/* libgcc functions for Blackfin.
+ Copyright (C) 2005-2014 Free Software Foundation, Inc.
+ Contributed by Analog Devices.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
+
+#ifdef L_divsi3
+.text
+.align 2
+.global ___divsi3;
+.type ___divsi3, STT_FUNC;
+
+___divsi3:
+ [--SP]= RETS;
+ [--SP] = R7;
+
+ R2 = -R0;
+ CC = R0 < 0;
+ IF CC R0 = R2;
+ R7 = CC;
+
+ R2 = -R1;
+ CC = R1 < 0;
+ IF CC R1 = R2;
+ R2 = CC;
+ R7 = R7 ^ R2;
+
+ CALL ___udivsi3;
+
+ CC = R7;
+ R1 = -R0;
+ IF CC R0 = R1;
+
+ R7 = [SP++];
+ RETS = [SP++];
+ RTS;
+#endif
+
+#ifdef L_modsi3
+.align 2
+.global ___modsi3;
+.type ___modsi3, STT_FUNC;
+
+___modsi3:
+ [--SP] = RETS;
+ [--SP] = R0;
+ [--SP] = R1;
+ CALL ___divsi3;
+ R2 = [SP++];
+ R1 = [SP++];
+ R2 *= R0;
+ R0 = R1 - R2;
+ RETS = [SP++];
+ RTS;
+#endif
+
+#ifdef L_udivsi3
+.align 2
+.global ___udivsi3;
+.type ___udivsi3, STT_FUNC;
+
+___udivsi3:
+ P0 = 32;
+ LSETUP (0f, 1f) LC0 = P0;
+ /* upper half of dividend */
+ R3 = 0;
+0:
+ /* The first time round in the loop we shift in garbage, but since we
+ perform 33 shifts, it doesn't matter. */
+ R0 = ROT R0 BY 1;
+ R3 = ROT R3 BY 1;
+ R2 = R3 - R1;
+ CC = R3 < R1 (IU);
+1:
+ /* Last instruction of the loop. */
+ IF ! CC R3 = R2;
+
+ /* Shift in the last bit. */
+ R0 = ROT R0 BY 1;
+ /* R0 is the result, R3 contains the remainder. */
+ R0 = ~ R0;
+ RTS;
+#endif
+
+#ifdef L_umodsi3
+.align 2
+.global ___umodsi3;
+.type ___umodsi3, STT_FUNC;
+
+___umodsi3:
+ [--SP] = RETS;
+ CALL ___udivsi3;
+ R0 = R3;
+ RETS = [SP++];
+ RTS;
+#endif
+
+#ifdef L_umulsi3_highpart
+.align 2
+.global ___umulsi3_highpart;
+.type ___umulsi3_highpart, STT_FUNC;
+
+___umulsi3_highpart:
+ A1 = R1.L * R0.L (FU);
+ A1 = A1 >> 16;
+ A0 = R1.H * R0.H, A1 += R1.L * R0.H (FU);
+ A1 += R0.L * R1.H (FU);
+ A1 = A1 >> 16;
+ A0 += A1;
+ R0 = A0 (FU);
+ RTS;
+#endif
+
+#ifdef L_smulsi3_highpart
+.align 2
+.global ___smulsi3_highpart;
+.type ___smulsi3_highpart, STT_FUNC;
+
+___smulsi3_highpart:
+ A1 = R1.L * R0.L (FU);
+ A1 = A1 >> 16;
+ A0 = R0.H * R1.H, A1 += R0.H * R1.L (IS,M);
+ A1 += R1.H * R0.L (IS,M);
+ A1 = A1 >>> 16;
+ R0 = (A0 += A1);
+ RTS;
+#endif
+
+#ifdef L_muldi3
+.align 2
+.global ___muldi3;
+.type ___muldi3, STT_FUNC;
+
+/*
+ R1:R0 * R3:R2
+ = R1.h:R1.l:R0.h:R0.l * R3.h:R3.l:R2.h:R2.l
+[X] = (R1.h * R3.h) * 2^96
+[X] + (R1.h * R3.l + R1.l * R3.h) * 2^80
+[X] + (R1.h * R2.h + R1.l * R3.l + R3.h * R0.h) * 2^64
+[T1] + (R1.h * R2.l + R3.h * R0.l + R1.l * R2.h + R3.l * R0.h) * 2^48
+[T2] + (R1.l * R2.l + R3.l * R0.l + R0.h * R2.h) * 2^32
+[T3] + (R0.l * R2.h + R2.l * R0.h) * 2^16
+[T4] + (R0.l * R2.l)
+
+ We can discard the first three lines marked "X" since we produce
+ only a 64 bit result. So, we need ten 16-bit multiplies.
+
+ Individual mul-acc results:
+[E1] = R1.h * R2.l + R3.h * R0.l + R1.l * R2.h + R3.l * R0.h
+[E2] = R1.l * R2.l + R3.l * R0.l + R0.h * R2.h
+[E3] = R0.l * R2.h + R2.l * R0.h
+[E4] = R0.l * R2.l
+
+ We also need to add high parts from lower-level results to higher ones:
+ E[n]c = E[n] + (E[n+1]c >> 16), where E4c := E4
+
+ One interesting property is that all parts of the result that depend
+ on the sign of the multiplication are discarded. Those would be the
+ multiplications involving R1.h and R3.h, but only the top 16 bit of
+ the 32 bit result depend on the sign, and since R1.h and R3.h only
+ occur in E1, the top half of these results is cut off.
+ So, we can just use FU mode for all of the 16-bit multiplies, and
+ ignore questions of when to use mixed mode. */
+
+___muldi3:
+ /* [SP] technically is part of the caller's frame, but we can
+ use it as scratch space. */
+ A0 = R2.H * R1.L, A1 = R2.L * R1.H (FU) || R3 = [SP + 12]; /* E1 */
+ A0 += R3.H * R0.L, A1 += R3.L * R0.H (FU) || [SP] = R4; /* E1 */
+ A0 += A1; /* E1 */
+ R4 = A0.w;
+ A0 = R0.l * R3.l (FU); /* E2 */
+ A0 += R2.l * R1.l (FU); /* E2 */
+
+ A1 = R2.L * R0.L (FU); /* E4 */
+ R3 = A1.w;
+ A1 = A1 >> 16; /* E3c */
+ A0 += R2.H * R0.H, A1 += R2.L * R0.H (FU); /* E2, E3c */
+ A1 += R0.L * R2.H (FU); /* E3c */
+ R0 = A1.w;
+ A1 = A1 >> 16; /* E2c */
+ A0 += A1; /* E2c */
+ R1 = A0.w;
+
+ /* low(result) = low(E3c):low(E4) */
+ R0 = PACK (R0.l, R3.l);
+ /* high(result) = E2c + (E1 << 16) */
+ R1.h = R1.h + R4.l (NS) || R4 = [SP];
+ RTS;
+
+.size ___muldi3, .-___muldi3
+#endif