* config/tc-mips.c (file_mips_isa): New static variable.
(md_begin): Set it. (s_mipsset): Add support for .set mipN to set the ISA level.
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Ian Lance Taylor
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950df4212c
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1051c97f63
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@ -1,3 +1,11 @@
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Wed Feb 2 11:40:11 1994 Ian Lance Taylor (ian@tweedledumb.cygnus.com)
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* config/tc-mips.c (file_mips_isa): New static variable.
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(md_begin): Set it.
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(s_mipsset): Add support for .set mipN to set the ISA level.
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* gasp.c (kinfo): Fully bracket initializer.
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Tue Feb 1 19:28:12 1994 Ken Raeburn (raeburn@cujo.cygnus.com)
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* gasp.c (malloc): Don't declare, since host.h or system header
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@ -96,9 +96,13 @@ const char *mips_target_format = DEFAULT_TARGET_FORMAT;
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unsigned long mips_gprmask;
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unsigned long mips_cprmask[4];
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/* MIPS ISA (Instruction Set Architecture) level. */
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/* MIPS ISA (Instruction Set Architecture) level (may be changed
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temporarily using .set mipsN). */
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static int mips_isa = -1;
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/* MIPS ISA we are using for this output file. */
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static int file_mips_isa;
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/* MIPS PIC level. 0 is normal, non-PIC code. 2 means to generate
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SVR4 ABI PIC calls. 1 doesn't mean anything. */
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static int mips_pic;
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@ -490,6 +494,8 @@ md_begin ()
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if (! ok)
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as_warn ("Could not set architecture and machine");
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file_mips_isa = mips_isa;
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op_hash = hash_new ();
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for (i = 0; i < NUMOPCODES;)
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@ -5198,6 +5204,20 @@ s_mipsset (x)
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{
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mips_nobopt = 1;
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}
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else if (strncmp (name, "mips", 4) == 0)
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{
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int isa;
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/* Permit the user to change the ISA on the fly. Needless to
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say, misuse can cause serious problems. */
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isa = atoi (name + 4);
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if (isa == 0)
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mips_isa = file_mips_isa;
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else if (isa < 1 || isa > 3)
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as_bad ("unknown ISA level");
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else
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mips_isa = isa;
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}
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else
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{
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as_warn ("Tried to set unrecognized symbol: %s\n", name);
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@ -219,7 +219,7 @@ Here is a brief summary of how to invoke @code{@value{AS}}. For details,
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[ -l ] [ -m68000 | -m68010 | -m68020 | ... ]
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@end ifset
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@ifset MIPS
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[ -nocpp ] [ -EL ] [ -EB ] [ -G @var{num} ]
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[ -nocpp ] [ -EL ] [ -EB ] [ -G @var{num} ] [ -mips1 ] [ -mips2 ] [ -mips3 ]
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@end ifset
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[ -- | @var{files} @dots{} ]
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@end smallexample
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@ -356,7 +356,7 @@ Warn when the assembler switches to another architecture.
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@ifset MIPS
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The following options are available when @value{AS} is configured for
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the MIPS R2000/R3000 processors.
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the MIPS R2000/R3000/R4000/R6000 processors.
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@table @code
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@item -G @var{num}
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@ -375,6 +375,14 @@ Generate ``big endian'' format output.
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@cindex little endian output, MIPS
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Generate ``little endian'' format output.
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@cindex MIPS ISA
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@item -mips1
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@item -mips2
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@item -mips3
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Generate code for a particular MIPS Instruction Set Architecture level. -mips1
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corresponds to the @sc{r2000} and @sc{r3000} processors, -mips2 to the
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@sc{r6000} processor, and -mips3 to the @sc{r4000} processor.
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@item -nocpp
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This option is ignored. It is accepted for compatibility with the native
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tools.
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@ -7116,15 +7124,18 @@ set addr(rd),imm4 subl rrd,addr(rs)
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@cindex MIPS R2000
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@cindex MIPS R3000
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@cindex MIPS R4000
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@cindex MIPS R6000
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@sc{gnu} @code{@value{AS}} for @sc{mips} architectures supports the @sc{mips}
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@sc{r2000} and @sc{r3000} processors. For information about the @sc{mips}
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instruction set, see @cite{MIPS RISC Architecture}, by Kane and Heindrich
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(Prentice-Hall).
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@sc{r2000}, @sc{r3000}, @sc{r4000} and @sc{r6000} processors. For information
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about the @sc{mips} instruction set, see @cite{MIPS RISC Architecture}, by Kane
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and Heindrich (Prentice-Hall).
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@menu
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* MIPS Opts:: Assembler options
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* MIPS Object:: ECOFF object code
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* MIPS Stabs:: Directives for debugging information
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* MIPS ISA:: Directives to override the ISA level
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@end menu
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@node MIPS Opts
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@ -7208,6 +7219,21 @@ not by traditional @sc{mips} debuggers (this enhancement is required to fully
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support C++ debugging). These directives are primarily used by compilers, not
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assembly language programmers!
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@node MIPS ISA
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@section Directives to override the ISA level
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@cindex MIPS ISA override
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@sc{mips} @code{@value{AS}} supports an additional directive to change the
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@sc{mips} Instruction Set Architecture level on the fly. This is not supported
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by traditional @sc{mips} assemblers. The directive is @code{.set mips@var{N}}.
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@var{N} should be a number from 0 to 3. A value from 1 to 3 will cause gas to
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start accepting instructions for the given ISA level; this affects not only
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which instructions are permitted, but also how certain macros are expanded.
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@code{.set mips0} will set the ISA level back to that set by the command line
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options, if any, or otherwise to the default for the configuration. This
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feature may be used to permit specific r4000 instructions while assembling in
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32 bit mode. It must be used with care.
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@end ifset
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@ifset GENERIC
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@ -7275,7 +7301,8 @@ required the proverbial one-bit fix.
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Ian Lance Taylor of Cygnus Support merged the Motorola and MIT syntax for the
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68k, completed support for some COFF targets (68k, i386 SVR3, and SCO Unix),
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and made a few other minor patches.
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added support for MIPS ECOFF and ELF targets, and made a few other minor
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patches.
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Steve Chamberlain made @code{@value{AS}} able to generate listings.
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