install.texi: Add s390 s390x as new targets.
*doc/install.texi: Add s390 s390x as new targets. *doc/invoke.texi: Add documantation of S/390 and zSeries target options. * doc/md.texi: Add documantation of S/390 and zSeries constraints. From-SVN: r44501
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@ -1,3 +1,10 @@
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2001-07-31 Hartmut Penner <hpenner@de.ibm.com>
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* doc/install.texi: Add s390 and s390x as new targets.
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* doc/invoke.texi: Add documantation of S/390 and zSeries
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target options.
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* doc/md.texi: Add documantation of S/390 and zSeries constraints.
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2001-07-30 Roman Zippel <zippel@linux-m68k.org>
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* config/m68k/m68k.md: Replace all general_operand with
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@ -1375,6 +1375,10 @@ GNU Compiler Collection on your machine.
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@item
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@uref{#romp-*-aos,,romp-*-aos, romp-*-mach}
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@item
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@uref{#s390-*-linux*}
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@item
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@uref{#s390x-*-linux*}
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@item
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@uref{#*-*-solaris*,,*-*-solaris*}
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@item
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@uref{#sparc-sun-solaris*,,sparc-sun-solaris*}
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@ -2926,6 +2930,20 @@ mismatches between the stage 2 and stage 3 compilers in various files.
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These errors are minor differences in some floating-point constants and
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can be safely ignored; the stage 3 compiler is correct.
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@html
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</p>
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<hr>
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@end html
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@heading @anchor{s390-*-linux*}s390-*-linux*
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S/390 system running Linux for S/390@.
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@html
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</p>
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<hr>
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@end html
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@heading @anchor{s390x-*-linux*}s390x-*-linux*
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zSeries system (64 Bit) running Linux for zSeries@.
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@html
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</p>
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<hr>
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@ -577,6 +577,12 @@ in the following sections.
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-minline-divide-max-throughput -mno-dwarf2-asm @gol
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-mfixed-range=@var{register-range}}
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@emph{S/390 and zSeries Options}
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@gccoptlist{
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-mhard-float -msoft-float -mbackchain -mno-backchain @gol
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-msmall-exec -mno-small-exec -mmvcle -mno-mvcle @gol
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-m64 -m31 -mdebug -mno-debug}
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@item Code Generation Options
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@xref{Code Gen Options,,Options for Code Generation Conventions}.
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@gccoptlist{
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@ -5083,6 +5089,7 @@ that macro, which enables you to change the defaults.
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* MCore Options::
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* IA-64 Options::
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* D30V Options::
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* S/390 and zSeries Options::
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@end menu
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@node M680x0 Options
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@ -8976,6 +8983,71 @@ Specify the maximum number of conditionally executed instructions that
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replace a branch. The default is 4.
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@end table
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@node S/390 and zSeries Options
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@subsection S/390 and zSeries Options
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@cindex S/390 and zSeries Options
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These are the @samp{-m} options defined for the S/390 and zSeries architecture.
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@table @gcctabopt
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@item -mhard-float
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@itemx -msoft-float
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@opindex mhard-float
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@opindex msoft-float
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Use (do not use) the hardware floating-point instructions and registers
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for floating-point operations. When @option{-msoft-float} is specified,
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functions in @file{libgcc.a} will be used to perform floating-point
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operations. When @option{-mhard-float} is specified, the compiler
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generates IEEE floating-point instructions. This is the default.
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@item -mbackchain
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@itemx -mno-backchain
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@opindex mbackchain
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@opindex mno-backchain
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Generate (or do not generate) code which maintains an explicit
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backchain within the stack frame that points to the caller's frame.
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This is currently needed to allow debugging. The default is to
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generate the backchain.
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@item -msmall-exec
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@itemx -mno-small-exec
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@opindex msmall-exec
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@opindex mno-small-exec
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Generate (or do not generate) code using the @code{bras} instruction
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to do subroutine calls.
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This only works reliably if the total executable size does not
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exceed 64k. The default is to use the @code{basr} instruction instead,
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which does not have this limitation.
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@item -m64
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@itemx -m31
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@opindex m64
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@opindex m31
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When @option{-m31} is specified, generate code compliant to the
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Linux for S/390 ABI@. When @option{-m64} is specified, generate
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code compliant to the Linux for zSeries ABI@. This allows GCC in
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particular to generate 64-bit instructions. For the @samp{s390}
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targets, the default is @option{-m31}, while the @samp{s390x}
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targets default to @option{-m64}.
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@item -mmvcle
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@itemx -mno-mvcle
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@opindex mmvcle
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@opindex mno-mvcle
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Generate (or do not generate) code using the @code{mvcle} instruction
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to perform block moves. When @option{-mno-mvcle} is specifed,
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use a @code{mvc} loop instead. This is the default.
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@item -mdebug
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@itemx -mno-debug
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@opindex mdebug
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@opindex mno-debug
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Print (or do not print) additional debug information when compiling.
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The default is to not print debug information.
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@end table
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@node Code Gen Options
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@section Options for Code Generation Conventions
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@cindex code generation conventions
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@ -1963,6 +1963,38 @@ Direct memory reference
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Symbolic address
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@end table
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@item S/390 and zSeries---@file{s390.h}
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@table @code
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@item a
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Address register (general purpose register except r0)
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@item d
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Data register (arbitrary general purpose register)
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@item f
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Floating-point register
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@item I
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Unsigned 8-bit constant (0--255)
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@item J
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Unsigned 12-bit constant (0--4095)
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@item K
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Signed 16-bit constant (@minus{}32768--32767)
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@item L
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Unsigned 16-bit constant (0--65535)
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@item Q
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Memory reference without index register
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@item S
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Symbolic constant suitable for use with the @code{larl} instruction
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@end table
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@end table
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@ifset INTERNALS
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