diff options
Diffstat (limited to 'gcc/doc/tm.texi')
| -rw-r--r-- | gcc/doc/tm.texi | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index d96932b4e48..10fd876fd09 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -2435,12 +2435,13 @@ register address. You should define this macro if base plus index addresses have different requirements than other base register uses. @end defmac -@defmac MODE_CODE_BASE_REG_CLASS (@var{mode}, @var{outer_code}, @var{index_code}) +@defmac MODE_CODE_BASE_REG_CLASS (@var{mode}, @var{address_space}, @var{outer_code}, @var{index_code}) A C expression whose value is the register class to which a valid -base register must belong. @var{outer_code} and @var{index_code} define the -context in which the base register occurs. @var{outer_code} is the code of -the immediately enclosing expression (@code{MEM} for the top level of an -address, @code{ADDRESS} for something that occurs in an +base register for a memory reference in mode @var{mode} to address +space @var{address_space} must belong. @var{outer_code} and @var{index_code} +define the context in which the base register occurs. @var{outer_code} is +the code of the immediately enclosing expression (@code{MEM} for the top level +of an address, @code{ADDRESS} for something that occurs in an @code{address_operand}). @var{index_code} is the code of the corresponding index expression if @var{outer_code} is @code{PLUS}; @code{SCRATCH} otherwise. @end defmac @@ -2480,8 +2481,11 @@ Use of this macro is deprecated; please use the more general @code{REGNO_MODE_CODE_OK_FOR_BASE_P}. @end defmac -@defmac REGNO_MODE_CODE_OK_FOR_BASE_P (@var{num}, @var{mode}, @var{outer_code}, @var{index_code}) -A C expression that is just like @code{REGNO_MODE_OK_FOR_BASE_P}, except +@defmac REGNO_MODE_CODE_OK_FOR_BASE_P (@var{num}, @var{mode}, @var{address_space}, @var{outer_code}, @var{index_code}) +A C expression which is nonzero if register number @var{num} is +suitable for use as a base register in operand addresses, accessing +memory in mode @var{mode} in address space @var{address_space}. +This is similar to @code{REGNO_MODE_OK_FOR_BASE_P}, except that that expression may examine the context in which the register appears in the memory reference. @var{outer_code} is the code of the immediately enclosing expression (@code{MEM} if at the top level of the |