checkpoint
This commit is contained in:
Doug Evans
parent
8dddf63f16
commit
e1b747c4f2
1 changed files with 135 additions and 41 deletions
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@ -40,6 +40,7 @@ static void insert_operand_final
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static int insert_file PARAMS ((const char *));
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static int cur_pke_insn_length PARAMS ((void));
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static void install_pke_length PARAMS ((char *, int));
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const char comment_chars[] = ";";
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@ -51,11 +52,16 @@ const char FLT_CHARS[] = "dD";
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/* Current assembler state.
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Instructions like mpg and direct are followed by a restricted set of
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instructions until an end marker (e.g. mpg is followed by vu insns). */
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typedef enum { ASM_INIT, ASM_MPG, ASM_GPUIF, ASM_VU } asm_state;
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typedef enum {
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ASM_INIT, ASM_MPG, ASM_DIRECT, ASM_UNPACK, ASM_GPUIF, ASM_VU
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} asm_state;
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static asm_state cur_asm_state = ASM_INIT;
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/* Pointer to pke insn currently being assembled or NULL if none. */
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static char *cur_pke_insn;
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/* For variable length instructions, pointer to the initial frag
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and pointer into that frag. These only hold valid values if
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cur_asm_state is one of ASM_MPG, ASM_DIRECT, ASM_UNPACK. */
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static fragS *cur_varlen_frag;
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static char *cur_varlen_insn;
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/* Non-zero if packing pke instructions in dma tags. */
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static int dma_pack_pke_p;
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@ -83,7 +89,7 @@ md_show_usage (stream)
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FILE *stream;
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{
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#if 0
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fprintf (stream, "TX VU options:\n");
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fprintf (stream, "DVP options:\n");
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#endif
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}
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@ -249,12 +255,12 @@ assemble_pke (str)
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else
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len = 1;
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f = frag_more (len * 4);
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/* Write out the instruction.
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Reminder: it is important to fetch enough space in one call to
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/* Reminder: it is important to fetch enough space in one call to
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`frag_more'. We use (f - frag_now->fr_literal) to compute where
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we are and we don't want frag_now to change between calls. */
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f = frag_more (len * 4);
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/* Write out the instruction. */
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for (i = 0; i < len; ++i)
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md_number_to_chars (f + i * 4, insn_buf[i], 4);
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@ -283,14 +289,15 @@ assemble_pke (str)
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(bfd_reloc_code_real_type) reloc_type);
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}
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/* Handle variable length insns. */
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if (opcode->flags & PKE_OPCODE_LENVAR)
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{
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/* Name of file to read data from. */
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char *file;
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/* In 32 bit words. */
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/* Length in 32 bit words. */
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int data_len;
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cur_pke_insn = NULL;
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file = NULL;
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data_len = 0;
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pke_get_var_data (&file, &data_len);
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@ -308,11 +315,22 @@ assemble_pke (str)
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if (data_len == 0 || data_len < -2)
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as_bad ("invalid data length");
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else if (data_len == -1)
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cur_pke_insn = f;
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{
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cur_varlen_frag = frag_now;
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cur_varlen_insn = f;
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if (opcode->flags & PKE_OPCODE_MPG)
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cur_asm_state = ASM_MPG;
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}
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else
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{
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install_pke_length (f, data_len * 4);
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/* Switch to VU state. We don't use MPG state as that is
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used to indicate we're expecting to see a .endmpg. */
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if (opcode->flags & PKE_OPCODE_MPG)
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cur_asm_state = ASM_VU;
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/* FIXME: We assume there is exactly the right amount of
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data. */
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}
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}
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}
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}
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@ -734,6 +752,20 @@ md_undefined_symbol (name)
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{
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return 0;
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}
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/* Called after parsing the file via md_after_pass_hook. */
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void
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dvp_parse_done ()
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{
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/* Check for missing .EndMpg, and supply one if necessary. */
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if (cur_asm_state == ASM_MPG)
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s_endmpg (0);
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else if (cur_asm_state == ASM_DIRECT)
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s_enddirect (0);
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else if (cur_asm_state == ASM_UNPACK)
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s_endunpack (0);
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}
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/* Functions concerning relocs. */
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@ -795,8 +827,9 @@ md_pcrel_from_section (fixP, sec)
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return 0;
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}
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/* FIXME: `& -16L'? */
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return (fixP->fx_frag->fr_address + fixP->fx_where) & -8L;
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/* We assume this is a vu branch.
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Offsets are calculated based on the address of the next insn. */
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return ((fixP->fx_frag->fr_address + fixP->fx_where) & -8L) + 8;
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}
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/* Apply a fixup to the object code. This is called for all the
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@ -1084,7 +1117,8 @@ parse_dma_ptr_autocount( opcode, operand, mods, insn_buf, pstr, errmsg)
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/* Data reference must be a .DmaData label. */
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struct symbol *label, *label2;
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char *name, *name2;
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const char *name;
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char *name2;
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int len;
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long count;
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@ -1131,6 +1165,29 @@ parse_dma_ptr_autocount( opcode, operand, mods, insn_buf, pstr, errmsg)
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return retval;
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}
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/* Return length in bytes of the variable length PKE insn
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currently being assembled. */
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static int
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cur_pke_insn_length ()
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{
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int byte_len;
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fragS *f;
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if (cur_varlen_frag == frag_now)
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byte_len = frag_more (0) - cur_varlen_insn - 4; /* -4 for mpg itself */
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else
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{
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byte_len = (cur_varlen_frag->fr_fix + cur_varlen_frag->fr_offset -
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(cur_varlen_insn - cur_varlen_frag->fr_literal)) - 4;
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for (f = cur_varlen_frag->fr_next; f != frag_now; f = f->fr_next)
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byte_len += f->fr_fix + f->fr_offset;
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byte_len += frag_now_fix ();
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}
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return byte_len;
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}
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/* Install length LEN, in bytes, in the pke insn at BUF.
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The bytes in BUF are in target order. */
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@ -1400,35 +1457,66 @@ static void
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s_enddirect (ignore)
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int ignore;
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{
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int byte_len;
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if (cur_asm_state != ASM_DIRECT)
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{
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as_bad ("`.enddirect' has no matching `direct' instruction");
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return;
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}
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static void
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s_endgpuif (ignore)
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int ignore;
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{
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byte_len = cur_pke_insn_length ();
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install_pke_length (cur_varlen_insn, byte_len);
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cur_asm_state = ASM_INIT;
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cur_varlen_frag = NULL;
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cur_varlen_insn = NULL;
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}
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static void
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s_endmpg (ignore)
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int ignore;
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{
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if (cur_asm_state != ASM_MPG || cur_pke_insn == NULL)
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as_bad ("`.endmpg' has no matching `mpg' instruction");
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else
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int byte_len;
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if (cur_asm_state != ASM_MPG)
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{
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/* Compute the length and install it in the instruction. */
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/*FIXME*/
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as_bad ("`.endmpg' has no matching `mpg' instruction");
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return;
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}
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byte_len = cur_pke_insn_length ();
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install_pke_length (cur_varlen_insn, byte_len);
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cur_asm_state = ASM_INIT;
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cur_pke_insn = NULL;
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}
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cur_varlen_frag = NULL;
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cur_varlen_insn = NULL;
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/* Update $.MpgLoc. */
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pke_set_mpgloc (pke_get_mpgloc () + byte_len);
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}
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static void
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s_endunpack (ignore)
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int ignore;
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{
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int byte_len;
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if (cur_asm_state != ASM_UNPACK)
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{
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as_bad ("`.endunpack' has no matching `unpack' instruction");
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return;
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}
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byte_len = cur_pke_insn_length ();
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install_pke_length (cur_varlen_insn, byte_len);
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cur_asm_state = ASM_INIT;
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cur_varlen_frag = NULL;
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cur_varlen_insn = NULL;
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/* Update $.UnpackLoc. */
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pke_set_unpackloc (pke_get_unpackloc () + byte_len);
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}
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static void
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@ -1438,6 +1526,12 @@ s_state (state)
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cur_asm_state = state;
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}
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static void
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s_endgpuif (ignore)
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int ignore;
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{
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}
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/* Parse a DMA data spec which can be either of '*' or a quad word count. */
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static int
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