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riscv-gcc-1
Commit 5fad8ebf by David Edelsohn
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- Document SLOW_UNALIGNED_ACCESS change. 

- Update copyright.

From-SVN: r31212
parent e1565e65
Showing with 6 additions and 5 deletions
gcc/tm.texi
@c Copyright (C) 1988,89,92,93,94,96,97,98,1999 Free Software Foundation, Inc. @c Copyright (C) 1988,89,92-99,2000 Free Software Foundation, Inc.
@c This is part of the GCC manual. @c This is part of the GCC manual.
@c For copying conditions, see the file gcc.texi. @c For copying conditions, see the file gcc.texi.
...@@ -4719,10 +4719,11 @@ recognize RTL structures like this: ...@@ -4719,10 +4719,11 @@ recognize RTL structures like this:
and likewise for @code{HImode}. and likewise for @code{HImode}.
@findex SLOW_UNALIGNED_ACCESS @findex SLOW_UNALIGNED_ACCESS
@item SLOW_UNALIGNED_ACCESS @item SLOW_UNALIGNED_ACCESS (@var{mode}, @var{alignment})
Define this macro to be the value 1 if unaligned accesses have a cost Define this macro to be the value 1 if memory accesses described by the
many times greater than aligned accesses, for example if they are @var{mode} and @var{alignment} parameters have a cost many times greater
emulated in a trap handler. than aligned accesses, for example if they are emulated in a trap
handler.
When this macro is non-zero, the compiler will act as if When this macro is non-zero, the compiler will act as if
@code{STRICT_ALIGNMENT} were non-zero when generating code for block @code{STRICT_ALIGNMENT} were non-zero when generating code for block
......
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