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| author | Bob Wilson <bob.wilson@acm.org> | 2007-04-25 21:40:42 +0000 |
|---|---|---|
| committer | Bob Wilson <bwilson@gcc.gnu.org> | 2007-04-25 21:40:42 +0000 |
| commit | a2c2290b622b0298330a8d3bc1de1ca1524e7762 (patch) | |
| tree | f7df6afd9db14aa950c9c9b048ad71b53f89a3e5 /gcc | |
| parent | 9f8b807381bf3e75c0b5b59e706cecdd0c4481ce (diff) | |
| download | gcc-a2c2290b622b0298330a8d3bc1de1ca1524e7762.zip gcc-a2c2290b622b0298330a8d3bc1de1ca1524e7762.tar.gz gcc-a2c2290b622b0298330a8d3bc1de1ca1524e7762.tar.bz2 | |
lib1funcs.asm (__udivsi3, __divsi3): Throw an exception for divide-by-zero.
* config/xtensa/lib1funcs.asm (__udivsi3, __divsi3): Throw an exception
for divide-by-zero.
(__umodsi3, __modsi3): Likewise.
From-SVN: r124165
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/xtensa/lib1funcs.asm | 35 |
2 files changed, 34 insertions, 7 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9dbd327..c4cfa5c 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2007-04-25 Bob Wilson <bob.wilson@acm.org> + + * config/xtensa/lib1funcs.asm (__udivsi3, __divsi3): Throw an exception + for divide-by-zero. + (__umodsi3, __modsi3): Likewise. + 2007-04-25 Dirk Mueller <dmueller@suse.de> * c-typeck.c (build_compound_expr): Annotate warning() diff --git a/gcc/config/xtensa/lib1funcs.asm b/gcc/config/xtensa/lib1funcs.asm index 5b4f8c8..6db2a7d 100644 --- a/gcc/config/xtensa/lib1funcs.asm +++ b/gcc/config/xtensa/lib1funcs.asm @@ -1,5 +1,6 @@ /* Assembly functions for the Xtensa version of libgcc1. - Copyright (C) 2001, 2002, 2003, 2005, 2006 Free Software Foundation, Inc. + Copyright (C) 2001, 2002, 2003, 2005, 2006, 2007 + Free Software Foundation, Inc. Contributed by Bob Wilson (bwilson@tensilica.com) at Tensilica. This file is part of GCC. @@ -530,7 +531,11 @@ __udivsi3: leaf_return .Lerror: - /* just return 0; could throw an exception */ + /* Divide by zero: Use an illegal instruction to force an exception. + The subsequent "DIV0" string can be recognized by the exception + handler to identify the real cause of the exception. */ + ill + .ascii "DIV0" .Lreturn0: movi a2, 0 @@ -597,7 +602,11 @@ __divsi3: leaf_return .Lerror: - /* just return 0; could throw an exception */ + /* Divide by zero: Use an illegal instruction to force an exception. + The subsequent "DIV0" string can be recognized by the exception + handler to identify the real cause of the exception. */ + ill + .ascii "DIV0" .Lreturn0: movi a2, 0 @@ -645,10 +654,16 @@ __umodsi3: leaf_return .Lle_one: - /* The divisor is either 0 or 1, so just return 0. - Someday we may want to throw an exception if the divisor is 0. */ + beqz a3, .Lerror movi a2, 0 leaf_return + +.Lerror: + /* Divide by zero: Use an illegal instruction to force an exception. + The subsequent "DIV0" string can be recognized by the exception + handler to identify the real cause of the exception. */ + ill + .ascii "DIV0" .size __umodsi3,.-__umodsi3 #endif /* L_umodsi3 */ @@ -697,10 +712,16 @@ __modsi3: leaf_return .Lle_one: - /* udivisor is either 0 or 1, so just return 0. - Someday we may want to throw an exception if udivisor is 0. */ + beqz a3, .Lerror movi a2, 0 leaf_return + +.Lerror: + /* Divide by zero: Use an illegal instruction to force an exception. + The subsequent "DIV0" string can be recognized by the exception + handler to identify the real cause of the exception. */ + ill + .ascii "DIV0" .size __modsi3,.-__modsi3 #endif /* L_modsi3 */ |