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@c Copyright (C) 1991, 1992, 1993, 1994, 1995, 2003 Free Software Foundation, Inc.
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@c This is part of the GAS manual.
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@c For copying conditions, see the file as.texinfo.
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@chapter H8/300 Dependent Features
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@cindex H8/300 support
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* H8/300 Options:: Options
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* H8/300 Syntax:: Syntax
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* H8/300 Floating Point:: Floating Point
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* H8/300 Directives:: H8/300 Machine Directives
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* H8/300 Opcodes:: Opcodes
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@cindex H8/300 options (none)
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@cindex options, H8/300 (none)
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@code{@value{AS}} has no additional command-line options for the
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Renesas (formerly Hitachi) H8/300 family.
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* H8/300-Chars:: Special Characters
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* H8/300-Regs:: Register Names
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* H8/300-Addressing:: Addressing Modes
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@subsection Special Characters
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@cindex line comment character, H8/300
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@cindex H8/300 line comment character
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@samp{;} is the line comment character.
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@cindex line separator, H8/300
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@cindex statement separator, H8/300
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@cindex H8/300 line separator
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@samp{$} can be used instead of a newline to separate statements.
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Therefore @emph{you may not use @samp{$} in symbol names} on the H8/300.
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@subsection Register Names
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@cindex H8/300 registers
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@cindex register names, H8/300
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You can use predefined symbols of the form @samp{r@var{n}h} and
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@samp{r@var{n}l} to refer to the H8/300 registers as sixteen 8-bit
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general-purpose registers. @var{n} is a digit from @samp{0} to
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@samp{7}); for instance, both @samp{r0h} and @samp{r7l} are valid
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You can also use the eight predefined symbols @samp{r@var{n}} to refer
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to the H8/300 registers as 16-bit registers (you must use this form for
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On the H8/300H, you can also use the eight predefined symbols
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@samp{er@var{n}} (@samp{er0} @dots{} @samp{er7}) to refer to the 32-bit
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general purpose registers.
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The two control registers are called @code{pc} (program counter; a
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16-bit register, except on the H8/300H where it is 24 bits) and
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@code{ccr} (condition code register; an 8-bit register). @code{r7} is
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used as the stack pointer, and can also be called @code{sp}.
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@node H8/300-Addressing
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@subsection Addressing Modes
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@cindex addressing modes, H8/300
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@cindex H8/300 addressing modes
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@value{AS} understands the following addressing modes for the H8/300:
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@item @@(@var{d}, r@var{n})
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@itemx @@(@var{d}:16, r@var{n})
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@itemx @@(@var{d}:24, r@var{n})
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Register indirect: 16-bit or 24-bit displacement @var{d} from register
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@var{n}. (24-bit displacements are only meaningful on the H8/300H.)
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Register indirect with post-increment
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Register indirect with pre-decrement
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@item @code{@@}@var{aa}
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@itemx @code{@@}@var{aa}:8
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@itemx @code{@@}@var{aa}:16
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@itemx @code{@@}@var{aa}:24
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Absolute address @code{aa}. (The address size @samp{:24} only makes
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sense on the H8/300H.)
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Immediate data @var{xx}. You may specify the @samp{:8}, @samp{:16}, or
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@samp{:32} for clarity, if you wish; but @code{@value{AS}} neither
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requires this nor uses it---the data size required is taken from
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@item @code{@@}@code{@@}@var{aa}
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@itemx @code{@@}@code{@@}@var{aa}:8
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Memory indirect. You may specify the @samp{:8} for clarity, if you
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wish; but @code{@value{AS}} neither requires this nor uses it.
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@node H8/300 Floating Point
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@section Floating Point
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@cindex floating point, H8/300 (@sc{ieee})
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@cindex H8/300 floating point (@sc{ieee})
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The H8/300 family has no hardware floating point, but the @code{.float}
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directive generates @sc{ieee} floating-point numbers for compatibility
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with other development tools.
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@node H8/300 Directives
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@section H8/300 Machine Directives
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@cindex H8/300 machine directives (none)
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@cindex machine directives, H8/300 (none)
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@cindex @code{word} directive, H8/300
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@cindex @code{int} directive, H8/300
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@code{@value{AS}} has the following machine-dependent directives for
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@cindex H8/300H, assembling for
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Recognize and emit additional instructions for the H8/300H variant, and
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also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
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for the H8/300 family.
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Recognize and emit additional instructions for the H8S variant, and
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also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
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for the H8/300 family.
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Recognize and emit additional instructions for the H8/300H variant in
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normal mode, and also make @code{.int} emit 32-bit numbers rather than
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the usual (16-bit) for the H8/300 family.
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Recognize and emit additional instructions for the H8S variant in
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normal mode, and also make @code{.int} emit 32-bit numbers rather than
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the usual (16-bit) for the H8/300 family.
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On the H8/300 family (including the H8/300H) @samp{.word} directives
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generate 16-bit numbers.
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@cindex H8/300 opcode summary
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@cindex opcode summary, H8/300
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@cindex mnemonics, H8/300
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@cindex instruction summary, H8/300
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For detailed information on the H8/300 machine instruction set, see
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@cite{H8/300 Series Programming Manual}. For information specific to
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the H8/300H, see @cite{H8/300H Series Programming Manual} (Renesas).
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@code{@value{AS}} implements all the standard H8/300 opcodes. No additional
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pseudo-instructions are needed on this family.
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@c this table, due to the multi-col faking and hardcoded order, looks silly
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@c except in smallbook. See comments below "@set SMALL" near top of this file.
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The following table summarizes the H8/300 opcodes, and their arguments.
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Entries marked @samp{*} are opcodes used only on the H8/300H.
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@c Using @group seems to use the normal baselineskip, not the smallexample
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@c baselineskip; looks approx doublespaced.
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Rs @r{source register}
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Rd @r{destination register}
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abs @r{absolute address}
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imm @r{immediate data}
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disp:N @r{N-bit displacement from a register}
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pcrel:N @r{N-bit displacement relative to program counter}
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add.b #imm,rd * andc #imm,ccr
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add.b rs,rd band #imm,rd
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add.w rs,rd band #imm,@@rd
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* add.w #imm,rd band #imm,@@abs:8
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* add.l rs,rd bra pcrel:8
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* add.l #imm,rd * bra pcrel:16
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adds #imm,rd bt pcrel:8
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addx #imm,rd * bt pcrel:16
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addx rs,rd brn pcrel:8
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and.b #imm,rd * brn pcrel:16
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and.b rs,rd bf pcrel:8
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* and.w rs,rd * bf pcrel:16
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* and.w #imm,rd bhi pcrel:8
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* and.l #imm,rd * bhi pcrel:16
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* and.l rs,rd bls pcrel:8
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* bls pcrel:16 bld #imm,rd
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bcc pcrel:8 bld #imm,@@rd
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* bcc pcrel:16 bld #imm,@@abs:8
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bhs pcrel:8 bnot #imm,rd
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* bhs pcrel:16 bnot #imm,@@rd
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bcs pcrel:8 bnot #imm,@@abs:8
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* bcs pcrel:16 bnot rs,rd
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blo pcrel:8 bnot rs,@@rd
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* blo pcrel:16 bnot rs,@@abs:8
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bne pcrel:8 bor #imm,rd
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* bne pcrel:16 bor #imm,@@rd
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beq pcrel:8 bor #imm,@@abs:8
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* beq pcrel:16 bset #imm,rd
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bvc pcrel:8 bset #imm,@@rd
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* bvc pcrel:16 bset #imm,@@abs:8
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bvs pcrel:8 bset rs,rd
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* bvs pcrel:16 bset rs,@@rd
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bpl pcrel:8 bset rs,@@abs:8
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* bpl pcrel:16 bsr pcrel:8
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bmi pcrel:8 bsr pcrel:16
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* bmi pcrel:16 bst #imm,rd
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bge pcrel:8 bst #imm,@@rd
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* bge pcrel:16 bst #imm,@@abs:8
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blt pcrel:8 btst #imm,rd
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* blt pcrel:16 btst #imm,@@rd
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bgt pcrel:8 btst #imm,@@abs:8
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* bgt pcrel:16 btst rs,rd
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ble pcrel:8 btst rs,@@rd
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* ble pcrel:16 btst rs,@@abs:8
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bclr #imm,rd bxor #imm,rd
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bclr #imm,@@rd bxor #imm,@@rd
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bclr #imm,@@abs:8 bxor #imm,@@abs:8
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bclr rs,rd cmp.b #imm,rd
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bclr rs,@@rd cmp.b rs,rd
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bclr rs,@@abs:8 cmp.w rs,rd
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biand #imm,rd cmp.w rs,rd
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biand #imm,@@rd * cmp.w #imm,rd
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biand #imm,@@abs:8 * cmp.l #imm,rd
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bild #imm,rd * cmp.l rs,rd
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bild #imm,@@rd daa rs
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bild #imm,@@abs:8 das rs
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bior #imm,rd dec.b rs
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bior #imm,@@rd * dec.w #imm,rd
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bior #imm,@@abs:8 * dec.l #imm,rd
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bist #imm,rd divxu.b rs,rd
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bist #imm,@@rd * divxu.w rs,rd
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bist #imm,@@abs:8 * divxs.b rs,rd
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bixor #imm,rd * divxs.w rs,rd
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bixor #imm,@@rd eepmov
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bixor #imm,@@abs:8 * eepmovw
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* exts.w rd mov.w rs,@@abs:16
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* exts.l rd * mov.l #imm,rd
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* extu.w rd * mov.l rs,rd
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* extu.l rd * mov.l @@rs,rd
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inc rs * mov.l @@(disp:16,rs),rd
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* inc.w #imm,rd * mov.l @@(disp:24,rs),rd
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* inc.l #imm,rd * mov.l @@rs+,rd
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jmp @@rs * mov.l @@abs:16,rd
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jmp abs * mov.l @@abs:24,rd
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jmp @@@@abs:8 * mov.l rs,@@rd
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jsr @@rs * mov.l rs,@@(disp:16,rd)
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jsr abs * mov.l rs,@@(disp:24,rd)
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jsr @@@@abs:8 * mov.l rs,@@-rd
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ldc #imm,ccr * mov.l rs,@@abs:16
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ldc rs,ccr * mov.l rs,@@abs:24
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* ldc @@abs:16,ccr movfpe @@abs:16,rd
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* ldc @@abs:24,ccr movtpe rs,@@abs:16
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* ldc @@(disp:16,rs),ccr mulxu.b rs,rd
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* ldc @@(disp:24,rs),ccr * mulxu.w rs,rd
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* ldc @@rs+,ccr * mulxs.b rs,rd
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* ldc @@rs,ccr * mulxs.w rs,rd
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* mov.b @@(disp:24,rs),rd neg.b rs
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* mov.b rs,@@(disp:24,rd) * neg.w rs
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mov.b @@abs:16,rd * neg.l rs
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mov.b @@abs:8,rd not.b rs
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mov.b rs,@@abs:8 * not.w rs
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mov.b rs,rd * not.l rs
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mov.b #imm,rd or.b #imm,rd
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mov.b @@rs,rd or.b rs,rd
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mov.b @@(disp:16,rs),rd * or.w #imm,rd
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mov.b @@rs+,rd * or.w rs,rd
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mov.b @@abs:8,rd * or.l #imm,rd
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mov.b rs,@@rd * or.l rs,rd
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mov.b rs,@@(disp:16,rd) orc #imm,ccr
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mov.b rs,@@-rd pop.w rs
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mov.b rs,@@abs:8 * pop.l rs
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mov.w rs,@@rd push.w rs
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* mov.w @@(disp:24,rs),rd * push.l rs
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* mov.w rs,@@(disp:24,rd) rotl.b rs
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* mov.w @@abs:24,rd * rotl.w rs
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* mov.w rs,@@abs:24 * rotl.l rs
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mov.w rs,rd rotr.b rs
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mov.w #imm,rd * rotr.w rs
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mov.w @@rs,rd * rotr.l rs
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mov.w @@(disp:16,rs),rd rotxl.b rs
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mov.w @@rs+,rd * rotxl.w rs
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mov.w @@abs:16,rd * rotxl.l rs
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mov.w rs,@@(disp:16,rd) rotxr.b rs
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mov.w rs,@@-rd * rotxr.w rs
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* rotxr.l rs * stc ccr,@@(disp:24,rd)
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rte * stc ccr,@@abs:16
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rts * stc ccr,@@abs:24
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shal.b rs sub.b rs,rd
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* shal.w rs sub.w rs,rd
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* shal.l rs * sub.w #imm,rd
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shar.b rs * sub.l rs,rd
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* shar.w rs * sub.l #imm,rd
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* shar.l rs subs #imm,rd
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shll.b rs subx #imm,rd
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* shll.w rs subx rs,rd
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* shll.l rs * trapa #imm
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shlr.b rs xor #imm,rd
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* shlr.w rs xor rs,rd
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* shlr.l rs * xor.w #imm,rd
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stc ccr,rd * xor.l #imm,rd
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* stc ccr,@@rs * xor.l rs,rd
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* stc ccr,@@(disp:16,rd) xorc #imm,ccr
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@cindex size suffixes, H8/300
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@cindex H8/300 size suffixes
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Four H8/300 instructions (@code{add}, @code{cmp}, @code{mov},
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@code{sub}) are defined with variants using the suffixes @samp{.b},
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@samp{.w}, and @samp{.l} to specify the size of a memory operand.
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@code{@value{AS}} supports these suffixes, but does not require them;
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since one of the operands is always a register, @code{@value{AS}} can
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deduce the correct size.
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For example, since @code{r0} refers to a 16-bit register,
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@exdent is equivalent to
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If you use the size suffixes, @code{@value{AS}} issues a warning when
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the suffix and the register size do not match.
added
removed
gas/doc/c-h8300.texi
