Imported gcc-4.4.3

[msp430-gcc.git] / gcc / config / bfin / lib1funcs.asm

diff --git a/gcc/config/bfin/lib1funcs.asm b/gcc/config/bfin/lib1funcs.asm
new file mode 100644 (file)
index 0000000..4e15ad2
--- /dev/null
+++ b/gcc/config/bfin/lib1funcs.asm
@@ -0,0 +1,146 @@
+/* libgcc functions for Blackfin.
+   Copyright (C) 2005, 2009 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