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Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index ea5f983a768..b757e269c27 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -545,6 +545,7 @@ Objective-C and Objective-C++ Dialects}. -msplit-addresses -mno-split-addresses @gol -mexplicit-relocs -mno-explicit-relocs @gol -mcheck-zero-division -mno-check-zero-division @gol +-mdivide-traps -mdivide-breaks @gol -mmemcpy -mno-memcpy -mlong-calls -mno-long-calls @gol -mmad -mno-mad -mfused-madd -mno-fused-madd -nocpp @gol -mfix-r4000 -mno-fix-r4000 -mfix-r4400 -mno-fix-r4400 @gol @@ -9500,6 +9501,23 @@ to use an assembler that supports relocation operators. Trap (do not trap) on integer division by zero. The default is @option{-mcheck-zero-division}. +@item -mdivide-traps +@itemx -mdivide-breaks +@opindex mdivide-traps +@opindex mdivide-breaks +MIPS systems check for division by zero by generating either a +conditional trap or a break instruction. Using traps results in +smaller code, but is only supported on MIPS II and later. Also, some +versions of the Linux kernel have a bug that prevents trap from +generating the proper signal (SIGFPE). Use @option{-mdivide-traps} to +allow conditional traps on architectures that support them and +@option{-mdivide-breaks} to force the use of breaks. + +The default is usually @option{-mdivide-traps}, but this can be +overridden at configure time using @option{--with-divide=breaks}. +Divide-by-zero checks can be completely disabled using +@option{-mno-check-zero-division}. + @item -mmemcpy @itemx -mno-memcpy @opindex mmemcpy |