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authorHans-Peter Nilsson <hp@axis.com>2004-11-04 15:00:37 +0000
committerHans-Peter Nilsson <hp@axis.com>2004-11-04 15:00:37 +0000
commitae57792d90d18306c9e470b9ecc245cdeef389f4 (patch)
treebd3957e95e9a8e9cf28eca84597470d3b127c1f8 /gas/doc
parentbac23f82ae51ce67cf2d2e0ce4e2e222413efadc (diff)
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* configure.in (crisv32): Recognize. AC_DEFINE_UNQUOTED
DEFAULT_CRIS_ARCH. Handle crisv32-*-linux-gnu* like cris-*-linux-gnu* and crisv32-*-* like cris-*-*. * configure: Regenerate. * config/tc-cris.c (enum cris_archs): New. (cris_mach, cris_arch_from_string, s_cris_arch, get_sup_reg) (cris_insn_ver_valid_for_arch): New functions. (DEFAULT_CRIS_ARCH): New macro, default to cris_any_v0_v10. (cris_arch): New variable. (md_pseudo_table): New pseudo .arch. (err_for_dangerous_mul_placement): Initialize according to DEFAULT_CRIS_ARCH. (STATE_COND_BRANCH): Renamed from STATE_CONDITIONAL_BRANCH. All users changed. (STATE_COND_BRANCH_V32, STATE_COND_BRANCH_COMMON) (STATE_ABS_BRANCH_V32, STATE_LAPC, BRANCH_BF_V32, BRANCH_BB_V32) (BRANCH_WF_V32, BRANCH_WB_V32): New. (BRANCH_BF, BRANCH_BB, BRANCH_WF, BRANCH_WB): Don't undef after use in md_cris_relax_table. (md_cris_relax_table): Add entries for STATE_COND_BRANCH_V32, STATE_COND_BRANCH_COMMON, STATE_ABS_BRANCH_V32, STATE_LAPC. Update and improve head comment. (OPTION_PIC): Define in terms of previous option, OPTION_US. (OPTION_MULBUG_ABORT_ON, OPTION_MULBUG_ABORT_OFF): Similar. (OPTION_ARCH): New. (md_longopts): New option --march=... (cris_any_v0_v10_long_jump_size, crisv32_long_jump_size): New macros. (md_long_jump_size): Initialize in terms of DEFAULT_CRIS_ARCH. (HANDLE_RELAXABLE): New macro. (md_estimate_size_before_relax): Use HANDLE_RELAXABLE for common cases. Check for weak symbols and assume not relaxable. Handle STATE_COND_BRANCH_V32, STATE_COND_BRANCH_COMMON, STATE_ABS_BRANCH_V32, STATE_LAPC. Use new variable symbolP, not fragP->fr_symbol. (md_convert_frag): Handle STATE_COND_BRANCH_V32, STATE_COND_BRANCH_COMMON, STATE_ABS_BRANCH_V32, STATE_LAPC. (cris_create_short_jump): Adjust for CRISv32. (md_create_long_jump): Ditto. Emit error for common_v10_v32. (md_begin): Define symbols "..asm.arch.cris.v32", "..asm.arch.cris.v10", "..asm.arch.cris.common_v10_v32" and "..asm.arch.cris.any_v0_v10". Use cris_insn_ver_valid_for_arch when entering opcode table entry points. (md_assemble): Adjust branch handling for CRISv32. Handle LAPC relaxation. In fix_new_exp call for main insn, pass 1 for pcrel parameter for 8, 16 and 32-bit pc-relative insns and LAPC. (cris_process_instruction): Initialize out_insnp->insn_type to CRIS_INSN_NONE, not CRIS_INSN_NORMAL. <case ']', '[', 'A', 'd', 'Q', 'N', 'n', 'Y', 'U', 'u', 'T'>: New cases. <case 'm'>: Check that modified_char == '.'. <invalid operands>: Consume the rest of the line. When operands don't match, skip over subsequent insns with non-matching version specifier but same mnemonic. <immediate constant, case SIZE_SPEC_REG>: Immediate operands for special registers in CRISv32 are always 32 bit long. <immediate constant, case SIZE_FIELD_SIGNED, SIZE_FIELD_UNSIGNED>: New cases. (get_gen_reg): Only recognize "PC" when followed by "+]" for v32 and compatible. Recognize "ACR" for v32, unless followed by "+". (get_spec_reg): Consider cris_arch when looking up register. (get_autoinc_prefix_or_indir_op): Don't recognize assignment for v32 or compatible. (get_3op_or_dip_prefix_op): Check for ']' after seeing '[rN+'. (cris_get_expression): Restore input_line_pointer if failing "early". (get_flags): Consider cris_arch and recognize flags accordingly. (branch_disp): Adjust for CRISv32. (gen_cond_branch_32): Similar. Emit error for common_v10_v32. (cris_number_to_imm): Use as_bad_where, not as_bad. Remove related FIXME. Don't insist on BFD_RELOC_32_PCREL fixup to be resolved. Don't enter zeros in object file for BFD_RELOC_32_PCREL. <case BFD_RELOC_CRIS_LAPCQ_OFFSET, BFD_RELOC_CRIS_SIGNED_16> <case BFD_RELOC_CRIS_SIGNED_8>: New case. (md_parse_option): Break out "return 1". <OPTION_ARCH> New case. (tc_gen_reloc): <case BFD_RELOC_CRIS_LAPCQ_OFFSET> <case BFD_RELOC_CRIS_SIGNED_16, BFD_RELOC_CRIS_SIGNED_8> <case BFD_RELOC_CRIS_UNSIGNED_8, BFD_RELOC_CRIS_UNSIGNED_16> <case BFD_RELOC_32_PCREL>: New cases. Addends for non-zero fx_pcrel are too in fx_offset. (md_show_usage): Show --march=<arch>. (md_apply_fix3): Adjust val for BFD_RELOC_CRIS_LAPCQ_OFFSET. (md_pcrel_from): BFD_RELOC_CRIS_LAPCQ_OFFSET is PC-relative too. (s_syntax) <struct syntaxes>: Properly constify member operand. * config/tc-cris.h (TARGET_MACH): Define. (cris_mach): Declare. * doc/as.texinfo (Overview) <CRIS>: Add --march=... * doc/c-cris.texi (CRIS-Symbols): New node for built-in symbols. (CRIS-Opts): Document --march=... (CRIS-Pseudos): Document .arch.
Diffstat (limited to 'gas/doc')
-rw-r--r--gas/doc/as.texinfo1
-rw-r--r--gas/doc/c-cris.texi102
2 files changed, 101 insertions, 2 deletions
diff --git a/gas/doc/as.texinfo b/gas/doc/as.texinfo
index 280fb32..26dd5e9 100644
--- a/gas/doc/as.texinfo
+++ b/gas/doc/as.texinfo
@@ -276,6 +276,7 @@ gcc(1), ld(1), and the Info entries for @file{binutils} and @file{ld}.
[@b{--underscore} | @b{--no-underscore}]
[@b{--pic}] [@b{-N}]
[@b{--emulation=criself} | @b{--emulation=crisaout}]
+ [@b{--march=v0_v10} | @b{--march=v10} | @b{--march=v32} | @b{--march=common_v10_v32}]
@c Deprecated -- deliberately not documented.
@c [@b{-h}] [@b{-H}]
@end ifset
diff --git a/gas/doc/c-cris.texi b/gas/doc/c-cris.texi
index e814767..e84952c 100644
--- a/gas/doc/c-cris.texi
+++ b/gas/doc/c-cris.texi
@@ -16,6 +16,7 @@
@menu
* CRIS-Opts:: Command-line Options
* CRIS-Expand:: Instruction expansion
+* CRIS-Symbols:: Symbols
* CRIS-Syntax:: Syntax
@end menu
@@ -68,6 +69,39 @@ affect expansion of instructions. The expansion with
@option{--pic} will use PC-relative rather than (slightly
faster) absolute addresses in those expansions.
+@cindex @option{--march=@var{architecture}} command line option, CRIS
+@cindex CRIS @option{--march=@var{architecture}} command line option
+@cindex Architecture variant option, CRIS
+@cindex CRIS architecture variant option
+The option @option{--march=@var{architecture}}
+@anchor{march-option}specifies the recognized instruction set
+and recognized register names. It also controls the
+architecture type of the object file. Valid values for
+@var{architecture} are:
+@table @code
+
+@item v0_v10
+All instructions and register names for any architecture variant
+in the set v0@dots{}v10 are recognized. This is the
+default if the target is configured as cris-*.
+
+@item v10
+Only instructions and register names for CRIS v10 (as found in
+ETRAX 100 LX) are recognized. This is the default if the target
+is configured as crisv10-*.
+
+@item v32
+Only instructions and register names for CRIS v32 (code name
+Guinness) are recognized. This is the default if the target is
+configured as crisv32-*. This value implies
+@option{--no-mul-bug-abort}. (A subsequent
+@option{--mul-bug-abort} will turn it back on.)
+
+@item common_v10_v32
+Only instructions with register names and addressing modes with
+opcodes common to the v10 and v32 are recognized.
+@end table
+
@cindex @option{-N} command line option, CRIS
@cindex CRIS @option{-N} command line option
When @option{-N} is specified, @code{@value{AS}} will emit a
@@ -113,6 +147,59 @@ full 32-bit address. Since this does not correspond to a single
instruction, such expansions can optionally be warned about.
@xref{CRIS-Opts}.
+If the operand is found to fit the range, a @code{lapc} mnemonic
+will translate to a @code{lapcq} instruction. Use @code{lapc.d}
+to force the 32-bit @code{lapc} instruction.
+
+Similarly, the @code{addo} mnemonic will translate to the
+shortest fitting instruction of @code{addoq}, @code{addo.w} and
+@code{addo.d}, when used with a operand that is a constant known
+at assembly time.
+
+@node CRIS-Symbols
+@section Symbols
+@cindex Symbols, built-in, CRIS
+@cindex Symbols, CRIS, built-in
+@cindex CRIS built-in symbols
+@cindex Built-in symbols, CRIS
+
+Some symbols are defined by the assembler. They're intended to
+be used in conditional assembly, for example:
+@smallexample
+ .if ..asm.arch.cris.v32
+ @var{code for CRIS v32}
+ .elseif ..asm.arch.cris.common_v10_v32
+ @var{code common to CRIS v32 and CRIS v10}
+ .elseif ..asm.arch.cris.v10 | ..asm.arch.cris.any_v0_v10
+ @var{code for v10}
+ .else
+ .error "Code needs to be added here."
+ .endif
+@end smallexample
+
+These symbols are defined in the assembler, reflecting
+command-line options, either when specified or the default.
+They are always defined, to 0 or 1.
+@table @code
+
+@item ..asm.arch.cris.any_v0_v10
+This symbol is non-zero when @option{--march=v0_v10} is specified
+or the default.
+
+@item ..asm.arch.cris.common_v10_v32
+Set according to the option @option{--march=common_v10_v32}.
+
+@item ..asm.arch.cris.v10
+Reflects the option @option{--march=v10}.
+
+@item ..asm.arch.cris.v32
+Corresponds to @option{--march=v10}.
+@end table
+
+Speaking of symbols, when a symbol is used in code, it can have
+a suffix modifying its value for use in position-independent
+code. @xref{CRIS-Pic}.
+
@node CRIS-Syntax
@section Syntax
@@ -147,7 +234,8 @@ separate instructions can be specified on a single line.
@cindex Position-independent code, symbols in, CRIS
When generating @anchor{crispic}position-independent code (SVR4
-PIC) for use in cris-axis-linux-gnu shared libraries, symbol
+PIC) for use in cris-axis-linux-gnu or crisv32-axis-linux-gnu
+shared libraries, symbol
suffixes are used to specify what kind of run-time symbol lookup
will be used, expressed in the object as different
@emph{relocation types}. Usually, all absolute symbol values
@@ -271,7 +359,7 @@ each expression, a 32-bit little-endian constant is emitted.
@cindex pseudo-op .syntax, CRIS
@cindex CRIS assembler directive .syntax
@cindex CRIS pseudo-op .syntax
-The @code{.syntax} directive takes as ARGUMENT one of the
+The @code{.syntax} directive takes as @var{ARGUMENT} one of the
following case-sensitive choices.
@table @code
@@ -305,6 +393,16 @@ directive and emits an error if the option @option{--underscore}
is in effect.
@end table
+@item .arch ARGUMENT
+@cindex assembler directive .arch, CRIS
+@cindex pseudo-op .arch, CRIS
+@cindex CRIS assembler directive .arch
+@cindex CRIS pseudo-op .arch
+This is an assertion directive, giving an error if the specified
+@var{ARGUMENT} is not the same as the specified or default value
+for the @option{--march=@var{architecture}} option
+(@pxref{march-option}).
+
@c If you compare with md_pseudo_table, you see that we don't
@c document ".file" and ".loc" here. This is because we're just
@c wrapping the corresponding ELF function and emitting an error for