/* Altera Nios II assembler.
- Copyright (C) 2012-2014 Free Software Foundation, Inc.
+ Copyright (C) 2012-2015 Free Software Foundation, Inc.
Contributed by Nigel Gray (ngray@altera.com).
Contributed by Mentor Graphics, Inc.
#include "elf/nios2.h"
#include "tc-nios2.h"
#include "bfd.h"
+#include "libbfd.h"
#include "dwarf2dbg.h"
#include "subsegs.h"
#include "safe-ctype.h"
#define OPTION_EB (OPTION_MD_BASE + 3)
{"EB", no_argument, NULL, OPTION_EB},
#define OPTION_EL (OPTION_MD_BASE + 4)
- {"EL", no_argument, NULL, OPTION_EL}
+ {"EL", no_argument, NULL, OPTION_EL},
+#define OPTION_MARCH (OPTION_MD_BASE + 5)
+ {"march", required_argument, NULL, OPTION_MARCH}
};
size_t md_longopts_size = sizeof (md_longopts);
{
/* Assembled instruction. */
unsigned long insn_code;
+
+ /* Constant bits masked into insn_code for self-check mode. */
+ unsigned long constant_bits;
+
/* Pointer to the relevant bit of the opcode table. */
const struct nios2_opcode *insn_nios2_opcode;
/* After parsing ptrs to the tokens in the instruction fill this array
nios2_insn_relocS *insn_reloc;
} nios2_insn_infoS;
-/* This struct associates an argument assemble function with
- an argument syntax string. Used by the assembler to find out
- how to parse and assemble a set of instruction operands and
- return the instruction field values. */
-typedef struct nios2_arg_info
-{
- const char *args;
- void (*assemble_args_func) (nios2_insn_infoS *insn_info);
-} nios2_arg_infoS;
/* This struct is used to convert Nios II pseudo-ops into the
corresponding real op. */
#define nios2_reg_lookup(NAME) \
((struct nios2_reg *) hash_find (nios2_reg_hash, (NAME)))
-/* Parse args hash table. */
-static struct hash_control *nios2_arg_hash = NULL;
-#define nios2_arg_lookup(NAME) \
- ((nios2_arg_infoS *) hash_find (nios2_arg_hash, (NAME)))
/* Pseudo-op hash table. */
static struct hash_control *nios2_ps_hash = NULL;
symbolS *GOT_symbol;
#endif
+/* The processor architecture value, EF_NIOS2_ARCH_R1 by default. */
+static int nios2_architecture = EF_NIOS2_ARCH_R1;
+
\f
/** Utility routines. */
/* Function md_chars_to_number takes the sequence of
#define strprefix(STR, PREFIX) \
(strncmp ((STR), PREFIX, strlen (PREFIX)) == 0)
-/* Return true if STR is prefixed with a control register name. */
-static int
-nios2_control_register_arg_p (const char *str)
-{
- return (strprefix (str, "ctl")
- || strprefix (str, "cpuid")
- || strprefix (str, "status")
- || strprefix (str, "estatus")
- || strprefix (str, "bstatus")
- || strprefix (str, "ienable")
- || strprefix (str, "ipending")
- || strprefix (str, "exception")
- || strprefix (str, "pteaddr")
- || strprefix (str, "tlbacc")
- || strprefix (str, "tlbmisc")
- || strprefix (str, "eccinj")
- || strprefix (str, "config")
- || strprefix (str, "mpubase")
- || strprefix (str, "mpuacc")
- || strprefix (str, "badaddr"));
-}
/* Return true if STR is prefixed with a special relocation operator. */
static int
|| strprefix (str, "%gotoff"));
}
-/* Checks whether the register name is a coprocessor
- register - returns TRUE if it is, FALSE otherwise. */
-static bfd_boolean
-nios2_coproc_reg (const char *reg_name)
-{
- gas_assert (reg_name != NULL);
-
- /* Check that we do have a valid register name and that it is a
- coprocessor register.
- It must begin with c, not be a control register, and be a valid
- register name. */
- if (strprefix (reg_name, "c")
- && !strprefix (reg_name, "ctl")
- && hash_find (nios2_reg_hash, reg_name) != NULL)
- return TRUE;
- else
- return FALSE;
-}
/* nop fill pattern for text section. */
static char const nop[4] = { 0x3a, 0x88, 0x01, 0x00 };
target = fragp->fr_next->fr_address + stretch;
}
- /* We subtract 4 because all pc relative branches are
- from the next instruction. */
- offset = target - fragp->fr_address - fragp->fr_fix - 4;
+ /* We subtract fr_var (4 for 32-bit insns) because all pc relative
+ branches are from the next instruction. */
+ offset = target - fragp->fr_address - fragp->fr_fix - fragp->fr_var;
if (offset >= -32768 && offset <= 32764)
/* Fits in PC-relative branch. */
n = 0;
if (IS_CBRANCH (subtype))
{
unsigned int br_opcode;
+ unsigned int old_op, new_op;
int nbytes;
/* Account for the nextpc and jmp in the pc-relative case, or the two
nbytes = 12;
br_opcode = md_chars_to_number (buffer, 4);
- switch (br_opcode & OP_MASK_OP)
+ old_op = GET_IW_R1_OP (br_opcode);
+ switch (old_op)
{
- case OP_MATCH_BEQ:
- br_opcode = (br_opcode & ~OP_MASK_OP) | OP_MATCH_BNE;
+ case R1_OP_BEQ:
+ new_op = R1_OP_BNE;
break;
- case OP_MATCH_BNE:
- br_opcode = (br_opcode & ~OP_MASK_OP) | OP_MATCH_BEQ ;
+ case R1_OP_BNE:
+ new_op = R1_OP_BEQ;
break;
- case OP_MATCH_BGE:
- br_opcode = (br_opcode & ~OP_MASK_OP) | OP_MATCH_BLT ;
+ case R1_OP_BGE:
+ new_op = R1_OP_BLT;
break;
- case OP_MATCH_BGEU:
- br_opcode = (br_opcode & ~OP_MASK_OP) | OP_MATCH_BLTU ;
+ case R1_OP_BGEU:
+ new_op = R1_OP_BLTU;
break;
- case OP_MATCH_BLT:
- br_opcode = (br_opcode & ~OP_MASK_OP) | OP_MATCH_BGE ;
+ case R1_OP_BLT:
+ new_op = R1_OP_BGE;
break;
- case OP_MATCH_BLTU:
- br_opcode = (br_opcode & ~OP_MASK_OP) | OP_MATCH_BGEU ;
+ case R1_OP_BLTU:
+ new_op = R1_OP_BGEU;
break;
default:
as_bad_where (fragp->fr_file, fragp->fr_line,
abort ();
}
- br_opcode = br_opcode | (nbytes << OP_SH_IMM16);
+ br_opcode = (br_opcode & ~IW_R1_OP_SHIFTED_MASK) | SET_IW_R1_OP (new_op);
+ br_opcode = br_opcode | SET_IW_I_IMM16 (nbytes);
md_number_to_chars (buffer, br_opcode, 4);
fragp->fr_fix += 4;
buffer += 4;
{
/* Insert the nextpc instruction. */
md_number_to_chars (buffer,
- OP_MATCH_NEXTPC | (AT_REGNUM << OP_SH_RRD), 4);
+ MATCH_R1_NEXTPC | SET_IW_R_C (AT_REGNUM), 4);
fragp->fr_fix += 4;
buffer += 4;
addend = 32767;
else
addend = -32768;
- addend_mask = (((unsigned int)addend) & 0xffff) << OP_SH_IMM16;
+ addend_mask = SET_IW_I_IMM16 ((unsigned int)addend);
/* Insert n-1 addi instructions. */
- addi_mask = (OP_MATCH_ADDI
- | (AT_REGNUM << OP_SH_IRD)
- | (AT_REGNUM << OP_SH_IRS));
+ addi_mask = (MATCH_R1_ADDI
+ | SET_IW_I_B (AT_REGNUM)
+ | SET_IW_I_A (AT_REGNUM));
for (i = 0; i < n - 1; i ++)
{
md_number_to_chars (buffer, addi_mask | addend_mask, 4);
/* Insert the last addi instruction to hold the remainder. */
remainder = offset - addend * (n - 1);
gas_assert (remainder >= -32768 && remainder <= 32767);
- addend_mask = (((unsigned int)remainder) & 0xffff) << OP_SH_IMM16;
+ addend_mask = SET_IW_I_IMM16 ((unsigned int)remainder);
md_number_to_chars (buffer, addi_mask | addend_mask, 4);
fragp->fr_fix += 4;
buffer += 4;
/* Load at for the absolute case. */
else
{
- md_number_to_chars (buffer, OP_MATCH_ORHI | 0x00400000, 4);
+ md_number_to_chars (buffer,
+ (MATCH_R1_ORHI | SET_IW_I_B (AT_REGNUM)
+ | SET_IW_I_A (0)),
+ 4);
fix_new (fragp, fragp->fr_fix, 4, fragp->fr_symbol, fragp->fr_offset,
0, BFD_RELOC_NIOS2_HI16);
fragp->fr_fix += 4;
buffer += 4;
- md_number_to_chars (buffer, OP_MATCH_ORI | 0x08400000, 4);
+ md_number_to_chars (buffer,
+ (MATCH_R1_ORI | SET_IW_I_B (AT_REGNUM)
+ | SET_IW_I_A (AT_REGNUM)),
+ 4);
fix_new (fragp, fragp->fr_fix, 4, fragp->fr_symbol, fragp->fr_offset,
0, BFD_RELOC_NIOS2_LO16);
fragp->fr_fix += 4;
}
/* Insert the jmp instruction. */
- md_number_to_chars (buffer, OP_MATCH_JMP | (AT_REGNUM << OP_SH_RRS), 4);
+ md_number_to_chars (buffer, MATCH_R1_JMP | SET_IW_R_A (AT_REGNUM), 4);
fragp->fr_fix += 4;
buffer += 4;
}
unsigned int range_min;
unsigned int range_max;
unsigned int address;
- gas_assert (fixP->fx_size == 4);
- opcode = nios2_find_opcode_hash (value);
+
+ opcode = nios2_find_opcode_hash (value, bfd_get_mach (stdoutput));
gas_assert (opcode);
+ gas_assert (fixP->fx_size == opcode->size);
overflow_msg_type = opcode->overflow_msg;
switch (overflow_msg_type)
{
FIXME : for some reason fixP->fx_pcrel isn't 1 when it should be
so I'm using the howto structure instead to determine this. */
if (howto->pc_relative == 1)
- fixup = fixup - (fixP->fx_frag->fr_address + fixP->fx_where + 4);
+ fixup = fixup - (fixP->fx_frag->fr_address + fixP->fx_where
+ + fixP->fx_size);
/* Get the instruction or data to be fixed up. */
buf = fixP->fx_frag->fr_literal + fixP->fx_where;
\f
/** Instruction parsing support. */
+/* General internal error routine. */
+
+static void
+bad_opcode (const struct nios2_opcode *op)
+{
+ fprintf (stderr, _("internal error: broken opcode descriptor for `%s %s'\n"),
+ op->name, op->args);
+ as_fatal (_("Broken assembler. No assembly attempted."));
+}
+
/* Special relocation directive strings. */
struct nios2_special_relocS
}
#endif
+/* Look up a register name and validate it for the given regtype.
+ Return the register mapping or NULL on failure. */
+static struct nios2_reg *
+nios2_parse_reg (const char *token, unsigned long regtype)
+{
+ struct nios2_reg *reg = nios2_reg_lookup (token);
+
+ if (reg == NULL)
+ {
+ as_bad (_("unknown register %s"), token);
+ return NULL;
+ }
+
+ /* Matched a register, but is it the wrong type? */
+ if (!(regtype & reg->regtype))
+ {
+ if (regtype & REG_CONTROL)
+ as_bad (_("expecting control register"));
+ else if (reg->regtype & REG_CONTROL)
+ as_bad (_("illegal use of control register"));
+ else if (reg->regtype & REG_COPROCESSOR)
+ as_bad (_("illegal use of coprocessor register"));
+ else
+ as_bad (_("invalid register %s"), token);
+ return NULL;
+ }
+
+ /* Warn for explicit use of special registers. */
+ if (reg->regtype & REG_NORMAL)
+ {
+ if (!nios2_as_options.noat && reg->index == 1)
+ as_warn (_("Register at (r1) can sometimes be corrupted by "
+ "assembler optimizations.\n"
+ "Use .set noat to turn off those optimizations "
+ "(and this warning)."));
+ if (!nios2_as_options.nobreak && reg->index == 25)
+ as_warn (_("The debugger will corrupt bt (r25).\n"
+ "If you don't need to debug this "
+ "code use .set nobreak to turn off this warning."));
+ if (!nios2_as_options.nobreak && reg->index == 30)
+ as_warn (_("The debugger will corrupt sstatus/ba (r30).\n"
+ "If you don't need to debug this "
+ "code use .set nobreak to turn off this warning."));
+ }
+
+ return reg;
+}
+
/* The various nios2_assemble_* functions call this
function to generate an expression from a string representing an expression.
It then tries to evaluate the expression, and if it can, returns its value.
static unsigned long
nios2_assemble_expression (const char *exprstr,
nios2_insn_infoS *insn,
- nios2_insn_relocS *prev_reloc,
bfd_reloc_code_real_type reloc_type,
unsigned int pcrel)
{
/* We potentially have a relocation. */
reloc = nios2_insn_reloc_new (reloc_type, pcrel);
- if (prev_reloc != NULL)
- prev_reloc->reloc_next = reloc;
- else
- insn->insn_reloc = reloc;
+ reloc->reloc_next = insn->insn_reloc;
+ insn->insn_reloc = reloc;
/* Parse the expression string. */
saved_line_ptr = input_line_pointer;
return (unsigned long) value;
}
-/* Argument assemble functions.
- All take an instruction argument string, and a pointer
- to an instruction opcode. Upon return the insn_opcode
- has the relevant fields filled in to represent the arg
- string. The return value is NULL if successful, or
- an error message if an error was detected.
- The naming conventions for these functions match the args template
- in the nios2_opcode structure, as documented in include/opcode/nios2.h.
- For example, nios2_assemble_args_dst is used for instructions with
- "d,s,t" args.
- See nios2_arg_info_structs below for the exact correspondence. */
-
-static void
-nios2_assemble_args_dst (nios2_insn_infoS *insn_info)
+/* Argument assemble functions. */
+static void
+nios2_assemble_arg_c (const char *token, nios2_insn_infoS *insn)
{
- if (insn_info->insn_tokens[1] != NULL
- && insn_info->insn_tokens[2] != NULL
- && insn_info->insn_tokens[3] != NULL)
- {
- struct nios2_reg *dst = nios2_reg_lookup (insn_info->insn_tokens[1]);
- struct nios2_reg *src1 = nios2_reg_lookup (insn_info->insn_tokens[2]);
- struct nios2_reg *src2 = nios2_reg_lookup (insn_info->insn_tokens[3]);
-
- if (dst == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[1]);
- else
- SET_INSN_FIELD (RRD, insn_info->insn_code, dst->index);
+ struct nios2_reg *reg = nios2_parse_reg (token, REG_CONTROL);
+ const struct nios2_opcode *op = insn->insn_nios2_opcode;
- if (src1 == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[2]);
- else
- SET_INSN_FIELD (RRS, insn_info->insn_code, src1->index);
-
- if (src2 == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[3]);
- else
- SET_INSN_FIELD (RRT, insn_info->insn_code, src2->index);
+ if (reg == NULL)
+ return;
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[4]);
+ switch (op->format)
+ {
+ case iw_r_type:
+ insn->insn_code |= SET_IW_R_IMM5 (reg->index);
+ break;
+ default:
+ bad_opcode (op);
}
}
-static void
-nios2_assemble_args_tsi (nios2_insn_infoS *insn_info)
+static void
+nios2_assemble_arg_d (const char *token, nios2_insn_infoS *insn)
{
- if (insn_info->insn_tokens[1] != NULL &&
- insn_info->insn_tokens[2] != NULL && insn_info->insn_tokens[3] != NULL)
- {
- struct nios2_reg *dst = nios2_reg_lookup (insn_info->insn_tokens[1]);
- struct nios2_reg *src1 = nios2_reg_lookup (insn_info->insn_tokens[2]);
- unsigned int src2
- = nios2_assemble_expression (insn_info->insn_tokens[3], insn_info,
- insn_info->insn_reloc, BFD_RELOC_NIOS2_S16,
- 0);
-
- if (dst == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[1]);
- else
- SET_INSN_FIELD (IRT, insn_info->insn_code, dst->index);
-
- if (src1 == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[2]);
- else
- SET_INSN_FIELD (IRS, insn_info->insn_code, src1->index);
+ const struct nios2_opcode *op = insn->insn_nios2_opcode;
+ unsigned long regtype = REG_NORMAL;
+ struct nios2_reg *reg;
- SET_INSN_FIELD (IMM16, insn_info->insn_code, src2);
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[4]);
- SET_INSN_FIELD (IMM16, insn_info->insn_code, 0);
- }
-}
+ if (op->format == iw_custom_type)
+ regtype |= REG_COPROCESSOR;
+ reg = nios2_parse_reg (token, regtype);
+ if (reg == NULL)
+ return;
-static void
-nios2_assemble_args_tsu (nios2_insn_infoS *insn_info)
-{
- if (insn_info->insn_tokens[1] != NULL
- && insn_info->insn_tokens[2] != NULL
- && insn_info->insn_tokens[3] != NULL)
+ switch (op->format)
{
- struct nios2_reg *dst = nios2_reg_lookup (insn_info->insn_tokens[1]);
- struct nios2_reg *src1 = nios2_reg_lookup (insn_info->insn_tokens[2]);
- unsigned int src2
- = nios2_assemble_expression (insn_info->insn_tokens[3], insn_info,
- insn_info->insn_reloc, BFD_RELOC_NIOS2_U16,
- 0);
-
- if (dst == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[1]);
- else
- SET_INSN_FIELD (IRT, insn_info->insn_code, dst->index);
-
- if (src1 == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[2]);
+ case iw_r_type:
+ insn->insn_code |= SET_IW_R_C (reg->index);
+ break;
+ case iw_custom_type:
+ insn->insn_code |= SET_IW_CUSTOM_C (reg->index);
+ if (reg->regtype & REG_COPROCESSOR)
+ insn->insn_code |= SET_IW_CUSTOM_READC (0);
else
- SET_INSN_FIELD (IRS, insn_info->insn_code, src1->index);
-
- SET_INSN_FIELD (IMM16, insn_info->insn_code, src2);
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[4]);
- SET_INSN_FIELD (IMM16, insn_info->insn_code, 0);
+ insn->insn_code |= SET_IW_CUSTOM_READC (1);
+ break;
+ default:
+ bad_opcode (op);
}
}
-static void
-nios2_assemble_args_sto (nios2_insn_infoS *insn_info)
+static void
+nios2_assemble_arg_s (const char *token, nios2_insn_infoS *insn)
{
- if (insn_info->insn_tokens[1] != NULL
- && insn_info->insn_tokens[2] != NULL
- && insn_info->insn_tokens[3] != NULL)
- {
- struct nios2_reg *dst = nios2_reg_lookup (insn_info->insn_tokens[1]);
- struct nios2_reg *src1 = nios2_reg_lookup (insn_info->insn_tokens[2]);
- unsigned int src2
- = nios2_assemble_expression (insn_info->insn_tokens[3], insn_info,
- insn_info->insn_reloc, BFD_RELOC_16_PCREL,
- 1);
-
- if (dst == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[1]);
- else
- SET_INSN_FIELD (IRS, insn_info->insn_code, dst->index);
+ const struct nios2_opcode *op = insn->insn_nios2_opcode;
+ unsigned long regtype = REG_NORMAL;
+ struct nios2_reg *reg;
- if (src1 == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[2]);
- else
- SET_INSN_FIELD (IRT, insn_info->insn_code, src1->index);
+ if (op->format == iw_custom_type)
+ regtype |= REG_COPROCESSOR;
+ reg = nios2_parse_reg (token, regtype);
+ if (reg == NULL)
+ return;
- SET_INSN_FIELD (IMM16, insn_info->insn_code, src2);
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[4]);
- SET_INSN_FIELD (IMM16, insn_info->insn_code, 0);
- }
-}
-
-static void
-nios2_assemble_args_o (nios2_insn_infoS *insn_info)
-{
- if (insn_info->insn_tokens[1] != NULL)
+ switch (op->format)
{
- unsigned long immed
- = nios2_assemble_expression (insn_info->insn_tokens[1], insn_info,
- insn_info->insn_reloc, BFD_RELOC_16_PCREL,
- 1);
- SET_INSN_FIELD (IMM16, insn_info->insn_code, immed);
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[2]);
- SET_INSN_FIELD (IMM16, insn_info->insn_code, 0);
+ case iw_r_type:
+ insn->insn_code |= SET_IW_R_A (reg->index);
+ break;
+ case iw_i_type:
+ insn->insn_code |= SET_IW_I_A (reg->index);
+ break;
+ case iw_custom_type:
+ insn->insn_code |= SET_IW_CUSTOM_A (reg->index);
+ if (reg->regtype & REG_COPROCESSOR)
+ insn->insn_code |= SET_IW_CUSTOM_READA (0);
+ else
+ insn->insn_code |= SET_IW_CUSTOM_READA (1);
+ break;
+ default:
+ bad_opcode (op);
}
}
-static void
-nios2_assemble_args_is (nios2_insn_infoS *insn_info)
+static void
+nios2_assemble_arg_t (const char *token, nios2_insn_infoS *insn)
{
- if (insn_info->insn_tokens[1] != NULL && insn_info->insn_tokens[2] != NULL)
- {
- struct nios2_reg *addr_src = nios2_reg_lookup (insn_info->insn_tokens[2]);
- unsigned long immed
- = nios2_assemble_expression (insn_info->insn_tokens[1], insn_info,
- insn_info->insn_reloc, BFD_RELOC_NIOS2_S16,
- 0);
+ const struct nios2_opcode *op = insn->insn_nios2_opcode;
+ unsigned long regtype = REG_NORMAL;
+ struct nios2_reg *reg;
- SET_INSN_FIELD (IMM16, insn_info->insn_code, immed);
+ if (op->format == iw_custom_type)
+ regtype |= REG_COPROCESSOR;
+ reg = nios2_parse_reg (token, regtype);
+ if (reg == NULL)
+ return;
- if (addr_src == NULL)
- as_bad (_("unknown base register %s"), insn_info->insn_tokens[2]);
+ switch (op->format)
+ {
+ case iw_r_type:
+ insn->insn_code |= SET_IW_R_B (reg->index);
+ break;
+ case iw_i_type:
+ insn->insn_code |= SET_IW_I_B (reg->index);
+ break;
+ case iw_custom_type:
+ insn->insn_code |= SET_IW_CUSTOM_B (reg->index);
+ if (reg->regtype & REG_COPROCESSOR)
+ insn->insn_code |= SET_IW_CUSTOM_READB (0);
else
- SET_INSN_FIELD (RRS, insn_info->insn_code, addr_src->index);
-
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[3]);
- SET_INSN_FIELD (IMM16, insn_info->insn_code, 0);
+ insn->insn_code |= SET_IW_CUSTOM_READB (1);
+ break;
+ default:
+ bad_opcode (op);
}
}
-static void
-nios2_assemble_args_m (nios2_insn_infoS *insn_info)
+static void
+nios2_assemble_arg_i (const char *token, nios2_insn_infoS *insn)
{
- if (insn_info->insn_tokens[1] != NULL)
- {
- unsigned long immed
- = nios2_assemble_expression (insn_info->insn_tokens[1], insn_info,
- insn_info->insn_reloc,
- (nios2_as_options.noat
- ? BFD_RELOC_NIOS2_CALL26_NOAT
- : BFD_RELOC_NIOS2_CALL26),
- 0);
-
- SET_INSN_FIELD (IMM26, insn_info->insn_code, immed);
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[2]);
- SET_INSN_FIELD (IMM26, insn_info->insn_code, 0);
- }
-}
+ const struct nios2_opcode *op = insn->insn_nios2_opcode;
+ unsigned int val;
-static void
-nios2_assemble_args_s (nios2_insn_infoS *insn_info)
-{
- if (insn_info->insn_tokens[1] != NULL)
+ switch (op->format)
{
- struct nios2_reg *src = nios2_reg_lookup (insn_info->insn_tokens[1]);
- if (src == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[1]);
- else
- SET_INSN_FIELD (RRS, insn_info->insn_code, src->index);
-
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[2]);
+ case iw_i_type:
+ val = nios2_assemble_expression (token, insn,
+ BFD_RELOC_NIOS2_S16, 0);
+ insn->constant_bits |= SET_IW_I_IMM16 (val);
+ break;
+ default:
+ bad_opcode (op);
}
}
-static void
-nios2_assemble_args_tis (nios2_insn_infoS *insn_info)
+static void
+nios2_assemble_arg_u (const char *token, nios2_insn_infoS *insn)
{
- if (insn_info->insn_tokens[1] != NULL
- && insn_info->insn_tokens[2] != NULL
- && insn_info->insn_tokens[3] != NULL)
- {
- struct nios2_reg *dst = nios2_reg_lookup (insn_info->insn_tokens[1]);
- struct nios2_reg *addr_src = nios2_reg_lookup (insn_info->insn_tokens[3]);
- unsigned long immed
- = nios2_assemble_expression (insn_info->insn_tokens[2], insn_info,
- insn_info->insn_reloc, BFD_RELOC_NIOS2_S16,
- 0);
-
- if (addr_src == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[3]);
- else
- SET_INSN_FIELD (RRS, insn_info->insn_code, addr_src->index);
+ const struct nios2_opcode *op = insn->insn_nios2_opcode;
+ unsigned int val;
- if (dst == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[1]);
- else
- SET_INSN_FIELD (RRT, insn_info->insn_code, dst->index);
-
- SET_INSN_FIELD (IMM16, insn_info->insn_code, immed);
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[4]);
- SET_INSN_FIELD (IMM16, insn_info->insn_code, 0);
- }
-}
-
-static void
-nios2_assemble_args_dc (nios2_insn_infoS *insn_info)
-{
- if (insn_info->insn_tokens[1] != NULL && insn_info->insn_tokens[2] != NULL)
+ switch (op->format)
{
- struct nios2_reg *ctl = nios2_reg_lookup (insn_info->insn_tokens[2]);
- struct nios2_reg *dst = nios2_reg_lookup (insn_info->insn_tokens[1]);
-
- if (ctl == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[1]);
- else
- SET_INSN_FIELD (RCTL, insn_info->insn_code, ctl->index);
-
- if (dst == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[2]);
- else
- SET_INSN_FIELD (RRD, insn_info->insn_code, dst->index);
-
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[3]);
+ case iw_i_type:
+ val = nios2_assemble_expression (token, insn,
+ BFD_RELOC_NIOS2_U16, 0);
+ insn->constant_bits |= SET_IW_I_IMM16 (val);
+ break;
+ default:
+ bad_opcode (op);
}
}
-static void
-nios2_assemble_args_cs (nios2_insn_infoS *insn_info)
+static void
+nios2_assemble_arg_o (const char *token, nios2_insn_infoS *insn)
{
- if (insn_info->insn_tokens[1] != NULL && insn_info->insn_tokens[2] != NULL)
- {
- struct nios2_reg *ctl = nios2_reg_lookup (insn_info->insn_tokens[1]);
- struct nios2_reg *src = nios2_reg_lookup (insn_info->insn_tokens[2]);
+ const struct nios2_opcode *op = insn->insn_nios2_opcode;
+ unsigned int val;
- if (ctl == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[1]);
- else if (ctl->index == 4)
- as_bad (_("ipending control register (ctl4) is read-only\n"));
- else
- SET_INSN_FIELD (RCTL, insn_info->insn_code, ctl->index);
-
- if (src == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[2]);
- else
- SET_INSN_FIELD (RRS, insn_info->insn_code, src->index);
-
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[3]);
+ switch (op->format)
+ {
+ case iw_i_type:
+ val = nios2_assemble_expression (token, insn,
+ BFD_RELOC_16_PCREL, 1);
+ insn->constant_bits |= SET_IW_I_IMM16 (val);
+ break;
+ default:
+ bad_opcode (op);
}
}
-static void
-nios2_assemble_args_ds (nios2_insn_infoS * insn_info)
+static void
+nios2_assemble_arg_j (const char *token, nios2_insn_infoS *insn)
{
- if (insn_info->insn_tokens[1] != NULL && insn_info->insn_tokens[2] != NULL)
- {
- struct nios2_reg *dst = nios2_reg_lookup (insn_info->insn_tokens[1]);
- struct nios2_reg *src = nios2_reg_lookup (insn_info->insn_tokens[2]);
-
- if (dst == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[1]);
- else
- SET_INSN_FIELD (RRD, insn_info->insn_code, dst->index);
+ const struct nios2_opcode *op = insn->insn_nios2_opcode;
+ unsigned int val;
- if (src == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[2]);
- else
- SET_INSN_FIELD (RRS, insn_info->insn_code, src->index);
-
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[3]);
+ switch (op->format)
+ {
+ case iw_r_type:
+ val = nios2_assemble_expression (token, insn,
+ BFD_RELOC_NIOS2_IMM5, 0);
+ insn->constant_bits |= SET_IW_R_IMM5 (val);
+ break;
+ default:
+ bad_opcode (op);
}
}
-static void
-nios2_assemble_args_ldst (nios2_insn_infoS *insn_info)
+static void
+nios2_assemble_arg_l (const char *token, nios2_insn_infoS *insn)
{
- if (insn_info->insn_tokens[1] != NULL
- && insn_info->insn_tokens[2] != NULL
- && insn_info->insn_tokens[3] != NULL
- && insn_info->insn_tokens[4] != NULL)
- {
- unsigned long custom_n
- = nios2_assemble_expression (insn_info->insn_tokens[1], insn_info,
- insn_info->insn_reloc,
- BFD_RELOC_NIOS2_IMM8, 0);
-
- struct nios2_reg *dst = nios2_reg_lookup (insn_info->insn_tokens[2]);
- struct nios2_reg *src1 = nios2_reg_lookup (insn_info->insn_tokens[3]);
- struct nios2_reg *src2 = nios2_reg_lookup (insn_info->insn_tokens[4]);
-
- SET_INSN_FIELD (CUSTOM_N, insn_info->insn_code, custom_n);
-
- if (dst == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[2]);
- else
- SET_INSN_FIELD (RRD, insn_info->insn_code, dst->index);
+ const struct nios2_opcode *op = insn->insn_nios2_opcode;
+ unsigned int val;
- if (src1 == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[3]);
- else
- SET_INSN_FIELD (RRS, insn_info->insn_code, src1->index);
-
- if (src2 == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[4]);
- else
- SET_INSN_FIELD (RRT, insn_info->insn_code, src2->index);
-
- /* Set or clear the bits to indicate whether coprocessor registers are
- used. */
- if (nios2_coproc_reg (insn_info->insn_tokens[2]))
- SET_INSN_FIELD (CUSTOM_C, insn_info->insn_code, 0);
- else
- SET_INSN_FIELD (CUSTOM_C, insn_info->insn_code, 1);
-
- if (nios2_coproc_reg (insn_info->insn_tokens[3]))
- SET_INSN_FIELD (CUSTOM_A, insn_info->insn_code, 0);
- else
- SET_INSN_FIELD (CUSTOM_A, insn_info->insn_code, 1);
-
- if (nios2_coproc_reg (insn_info->insn_tokens[4]))
- SET_INSN_FIELD (CUSTOM_B, insn_info->insn_code, 0);
- else
- SET_INSN_FIELD (CUSTOM_B, insn_info->insn_code, 1);
-
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[5]);
+ switch (op->format)
+ {
+ case iw_custom_type:
+ val = nios2_assemble_expression (token, insn,
+ BFD_RELOC_NIOS2_IMM8, 0);
+ insn->constant_bits |= SET_IW_CUSTOM_N (val);
+ break;
+ default:
+ bad_opcode (op);
}
}
-static void
-nios2_assemble_args_none (nios2_insn_infoS *insn_info ATTRIBUTE_UNUSED)
+static void
+nios2_assemble_arg_m (const char *token, nios2_insn_infoS *insn)
{
- /* Nothing to do. */
-}
+ const struct nios2_opcode *op = insn->insn_nios2_opcode;
+ unsigned int val;
-static void
-nios2_assemble_args_dsj (nios2_insn_infoS *insn_info)
-{
- if (insn_info->insn_tokens[1] != NULL
- && insn_info->insn_tokens[2] != NULL
- && insn_info->insn_tokens[3] != NULL)
+ switch (op->format)
{
- struct nios2_reg *dst = nios2_reg_lookup (insn_info->insn_tokens[1]);
- struct nios2_reg *src1 = nios2_reg_lookup (insn_info->insn_tokens[2]);
-
- /* A 5-bit constant expression. */
- unsigned int src2 =
- nios2_assemble_expression (insn_info->insn_tokens[3], insn_info,
- insn_info->insn_reloc,
- BFD_RELOC_NIOS2_IMM5, 0);
-
- if (dst == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[1]);
- else
- SET_INSN_FIELD (RRD, insn_info->insn_code, dst->index);
-
- if (src1 == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[2]);
- else
- SET_INSN_FIELD (RRS, insn_info->insn_code, src1->index);
-
- SET_INSN_FIELD (IMM5, insn_info->insn_code, src2);
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[4]);
- SET_INSN_FIELD (IMM5, insn_info->insn_code, 0);
+ case iw_j_type:
+ val = nios2_assemble_expression (token, insn,
+ (nios2_as_options.noat
+ ? BFD_RELOC_NIOS2_CALL26_NOAT
+ : BFD_RELOC_NIOS2_CALL26),
+ 0);
+ insn->constant_bits |= SET_IW_J_IMM26 (val);
+ break;
+ default:
+ bad_opcode (op);
}
}
static void
-nios2_assemble_args_d (nios2_insn_infoS *insn_info)
+nios2_assemble_args (nios2_insn_infoS *insn)
{
- if (insn_info->insn_tokens[1] != NULL)
- {
- struct nios2_reg *dst = nios2_reg_lookup (insn_info->insn_tokens[1]);
-
- if (dst == NULL)
- as_bad (_("unknown register %s"), insn_info->insn_tokens[1]);
- else
- SET_INSN_FIELD (RRD, insn_info->insn_code, dst->index);
+ const struct nios2_opcode *op = insn->insn_nios2_opcode;
+ const char *argptr;
+ unsigned int tokidx, ntok;
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[2]);
- }
-}
+ /* Make sure there are enough arguments. */
+ ntok = (op->pinfo & NIOS2_INSN_OPTARG) ? op->num_args - 1 : op->num_args;
+ for (tokidx = 1; tokidx <= ntok; tokidx++)
+ if (insn->insn_tokens[tokidx] == NULL)
+ {
+ as_bad ("missing argument");
+ return;
+ }
-static void
-nios2_assemble_args_b (nios2_insn_infoS *insn_info)
-{
- unsigned int imm5 = 0;
+ for (argptr = op->args, tokidx = 1;
+ *argptr && insn->insn_tokens[tokidx];
+ argptr++)
+ switch (*argptr)
+ {
+ case ',':
+ case '(':
+ case ')':
+ break;
- if (insn_info->insn_tokens[1] != NULL)
- {
- /* A 5-bit constant expression. */
- imm5 = nios2_assemble_expression (insn_info->insn_tokens[1],
- insn_info, insn_info->insn_reloc,
- BFD_RELOC_NIOS2_IMM5, 0);
- SET_INSN_FIELD (TRAP_IMM5, insn_info->insn_code, imm5);
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[2]);
- }
+ case 'c':
+ nios2_assemble_arg_c (insn->insn_tokens[tokidx++], insn);
+ break;
+
+ case 'd':
+ nios2_assemble_arg_d (insn->insn_tokens[tokidx++], insn);
+ break;
+
+ case 's':
+ nios2_assemble_arg_s (insn->insn_tokens[tokidx++], insn);
+ break;
+
+ case 't':
+ nios2_assemble_arg_t (insn->insn_tokens[tokidx++], insn);
+ break;
+
+ case 'i':
+ nios2_assemble_arg_i (insn->insn_tokens[tokidx++], insn);
+ break;
+
+ case 'u':
+ nios2_assemble_arg_u (insn->insn_tokens[tokidx++], insn);
+ break;
+
+ case 'o':
+ nios2_assemble_arg_o (insn->insn_tokens[tokidx++], insn);
+ break;
+
+ case 'j':
+ nios2_assemble_arg_j (insn->insn_tokens[tokidx++], insn);
+ break;
+
+ case 'l':
+ nios2_assemble_arg_l (insn->insn_tokens[tokidx++], insn);
+ break;
+
+ case 'm':
+ nios2_assemble_arg_m (insn->insn_tokens[tokidx++], insn);
+ break;
+
+ default:
+ bad_opcode (op);
+ break;
+ }
- SET_INSN_FIELD (TRAP_IMM5, insn_info->insn_code, imm5);
-
- nios2_check_assembly (insn_info->insn_code, insn_info->insn_tokens[2]);
-}
-
-/* This table associates pointers to functions that parse the arguments to an
- instruction and fill in the relevant fields of the instruction. */
-const nios2_arg_infoS nios2_arg_info_structs[] = {
- /* args, assemble_args_func */
- {"d,s,t", nios2_assemble_args_dst},
- {"d,s,t,E", nios2_assemble_args_dst},
- {"t,s,i", nios2_assemble_args_tsi},
- {"t,s,i,E", nios2_assemble_args_tsi},
- {"t,s,u", nios2_assemble_args_tsu},
- {"t,s,u,E", nios2_assemble_args_tsu},
- {"s,t,o", nios2_assemble_args_sto},
- {"s,t,o,E", nios2_assemble_args_sto},
- {"o", nios2_assemble_args_o},
- {"o,E", nios2_assemble_args_o},
- {"s", nios2_assemble_args_s},
- {"s,E", nios2_assemble_args_s},
- {"", nios2_assemble_args_none},
- {"E", nios2_assemble_args_none},
- {"i(s)", nios2_assemble_args_is},
- {"i(s)E", nios2_assemble_args_is},
- {"m", nios2_assemble_args_m},
- {"m,E", nios2_assemble_args_m},
- {"t,i(s)", nios2_assemble_args_tis},
- {"t,i(s)E", nios2_assemble_args_tis},
- {"d,c", nios2_assemble_args_dc},
- {"d,c,E", nios2_assemble_args_dc},
- {"c,s", nios2_assemble_args_cs},
- {"c,s,E", nios2_assemble_args_cs},
- {"d,s", nios2_assemble_args_ds},
- {"d,s,E", nios2_assemble_args_ds},
- {"l,d,s,t", nios2_assemble_args_ldst},
- {"l,d,s,t,E", nios2_assemble_args_ldst},
- {"d,s,j", nios2_assemble_args_dsj},
- {"d,s,j,E", nios2_assemble_args_dsj},
- {"d", nios2_assemble_args_d},
- {"d,E", nios2_assemble_args_d},
- {"b", nios2_assemble_args_b},
- {"b,E", nios2_assemble_args_b}
-};
+ /* Perform argument checking. */
+ nios2_check_assembly (insn->insn_code | insn->constant_bits,
+ insn->insn_tokens[tokidx]);
+}
-#define NIOS2_NUM_ARGS \
- ((sizeof(nios2_arg_info_structs)/sizeof(nios2_arg_info_structs[0])))
-const int nios2_num_arg_info_structs = NIOS2_NUM_ARGS;
/* The function consume_arg takes a pointer into a string
of instruction tokens (args) and a pointer into a string
expected type, throwing an error if it is not, and returns
the pointer argstr. */
static char *
-nios2_consume_arg (nios2_insn_infoS *insn, char *argstr, const char *parsestr)
+nios2_consume_arg (char *argstr, const char *parsestr)
{
char *temp;
- int regno = -1;
switch (*parsestr)
{
case 'c':
- if (!nios2_control_register_arg_p (argstr))
- as_bad (_("expecting control register"));
- break;
case 'd':
case 's':
case 't':
-
- /* We check to make sure we don't have a control register. */
- if (nios2_control_register_arg_p (argstr))
- as_bad (_("illegal use of control register"));
-
- /* And whether coprocessor registers are valid here. */
- if (nios2_coproc_reg (argstr)
- && insn->insn_nios2_opcode->match != OP_MATCH_CUSTOM)
- as_bad (_("illegal use of coprocessor register\n"));
-
- /* Extract a register number if the register is of the
- form r[0-9]+, if it is a normal register, set
- regno to its number (0-31), else set regno to -1. */
- if (argstr[0] == 'r' && ISDIGIT (argstr[1]))
- {
- char *p = argstr;
-
- ++p;
- regno = 0;
- do
- {
- regno *= 10;
- regno += *p - '0';
- ++p;
- }
- while (ISDIGIT (*p));
- }
- else
- regno = -1;
-
- /* And whether we are using at. */
- if (!nios2_as_options.noat
- && (regno == 1 || strprefix (argstr, "at")))
- as_warn (_("Register at (r1) can sometimes be corrupted by assembler "
- "optimizations.\n"
- "Use .set noat to turn off those optimizations (and this "
- "warning)."));
-
- /* And whether we are using oci registers. */
- if (!nios2_as_options.nobreak
- && (regno == 25 || strprefix (argstr, "bt")))
- as_warn (_("The debugger will corrupt bt (r25).\n"
- "If you don't need to debug this "
- "code use .set nobreak to turn off this warning."));
-
- if (!nios2_as_options.nobreak
- && (regno == 30
- || strprefix (argstr, "ba")
- || strprefix (argstr, "sstatus")))
- as_warn (_("The debugger will corrupt sstatus/ba (r30).\n"
- "If you don't need to debug this "
- "code use .set nobreak to turn off this warning."));
break;
+
case 'i':
case 'u':
if (*argstr == '%')
case 'm':
case 'j':
case 'l':
- case 'b':
/* We can't have %hi, %lo or %hiadj here. */
if (*argstr == '%')
as_bad (_("badly formed expression near %s"), argstr);
break;
case 'o':
+ case 'E':
break;
default:
BAD_CASE (*parsestr);
if (p != NULL)
*p++ = 0;
- else
- as_bad (_("expecting %c near %s"), *separator, argstr);
return p;
}
while (p != NULL && !terminate && i < NIOS2_MAX_INSN_TOKENS)
{
- parsed_args[i] = nios2_consume_arg (insn, p, parsestr);
+ parsed_args[i] = nios2_consume_arg (p, parsestr);
++parsestr;
- if (*parsestr != '\0')
+ while (*parsestr == '(' || *parsestr == ')' || *parsestr == ',')
{
+ char *context = p;
p = nios2_consume_separator (p, parsestr);
+ /* Check for missing separators. */
+ if (!p && !(insn->insn_nios2_opcode->pinfo & NIOS2_INSN_OPTARG))
+ {
+ as_bad (_("expecting %c near %s"), *parsestr, context);
+ break;
+ }
++parsestr;
}
- else
+
+ if (*parsestr == '\0')
{
/* Check that the argument string has no trailing arguments. */
- /* If we've got a %lo etc relocation, we've zapped the parens with
- spaces. */
- if (nios2_special_relocation_p (p))
- end = strpbrk (p, ",");
- else
- end = strpbrk (p, " ,");
-
+ end = strpbrk (p, ",");
if (end != NULL)
as_bad (_("too many arguments"));
}
}
parsed_args[i] = NULL;
-
- /* The argument to break and trap instructions is optional; complain
- for other cases of missing arguments. */
- if (*parsestr != '\0'
- && insn->insn_nios2_opcode->match != OP_MATCH_BREAK
- && insn->insn_nios2_opcode->match != OP_MATCH_TRAP)
- as_bad (_("missing argument"));
}
\f
/** Assembler output support. */
-static int
-can_evaluate_expr (nios2_insn_infoS *insn)
-{
- /* Remove this check for null and the invalid insn "ori r9, 1234" seg faults. */
- if (!insn->insn_reloc)
- /* ??? Ideally we should do something other than as_fatal here as we can
- continue to assemble.
- However this function (actually the output_* functions) should not
- have been called in the first place once an illegal instruction had
- been encountered. */
- as_fatal (_("Invalid instruction encountered, cannot recover. No assembly attempted."));
-
- if (insn->insn_reloc->reloc_expression.X_op == O_constant)
- return 1;
-
- return 0;
-}
-
-static int
-get_expr_value (nios2_insn_infoS *insn)
-{
- int value = 0;
-
- if (insn->insn_reloc->reloc_expression.X_op == O_constant)
- value = insn->insn_reloc->reloc_expression.X_add_number;
- return value;
-}
-
/* Output a normal instruction. */
static void
output_insn (nios2_insn_infoS *insn)
{
char *f;
- nios2_insn_relocS *reloc;
-
- f = frag_more (4);
+ nios2_insn_relocS *reloc;
+ f = frag_more (insn->insn_nios2_opcode->size);
/* This allocates enough space for the instruction
and puts it in the current frag. */
- md_number_to_chars (f, insn->insn_code, 4);
+ md_number_to_chars (f, insn->insn_code, insn->insn_nios2_opcode->size);
/* Emit debug info. */
- dwarf2_emit_insn (4);
+ dwarf2_emit_insn (insn->insn_nios2_opcode->size);
/* Create any fixups to be acted on later. */
+
for (reloc = insn->insn_reloc; reloc != NULL; reloc = reloc->reloc_next)
- fix_new_exp (frag_now, f - frag_now->fr_literal, 4,
+ fix_new_exp (frag_now, f - frag_now->fr_literal,
+ insn->insn_nios2_opcode->size,
&reloc->reloc_expression, reloc->reloc_pcrel,
reloc->reloc_type);
}
to accommodate the largest possible instruction sequence
this may generate. */
f = frag_var (rs_machine_dependent,
- UBRANCH_MAX_SIZE, 4, UBRANCH_SUBTYPE (0),
- symp, offset, NULL);
+ UBRANCH_MAX_SIZE, insn->insn_nios2_opcode->size,
+ UBRANCH_SUBTYPE (0), symp, offset, NULL);
- md_number_to_chars (f, insn->insn_code, 4);
+ md_number_to_chars (f, insn->insn_code, insn->insn_nios2_opcode->size);
/* We leave fixup generation to md_convert_frag. */
}
to accommodate the largest possible instruction sequence
this may generate. */
f = frag_var (rs_machine_dependent,
- CBRANCH_MAX_SIZE, 4, CBRANCH_SUBTYPE (0),
- symp, offset, NULL);
+ CBRANCH_MAX_SIZE, insn->insn_nios2_opcode->size,
+ CBRANCH_SUBTYPE (0), symp, offset, NULL);
- md_number_to_chars (f, insn->insn_code, 4);
+ md_number_to_chars (f, insn->insn_code, insn->insn_nios2_opcode->size);
/* We leave fixup generation to md_convert_frag. */
}
char *f = frag_more (12);
nios2_insn_relocS *reloc = insn->insn_reloc;
- md_number_to_chars (f, OP_MATCH_ORHI | 0x00400000, 4);
+ md_number_to_chars (f,
+ (MATCH_R1_ORHI | SET_IW_I_B (AT_REGNUM)
+ | SET_IW_I_A (0)),
+ 4);
dwarf2_emit_insn (4);
fix_new_exp (frag_now, f - frag_now->fr_literal, 4,
&reloc->reloc_expression, 0, BFD_RELOC_NIOS2_HI16);
- md_number_to_chars (f + 4, OP_MATCH_ORI | 0x08400000, 4);
+ md_number_to_chars (f + 4,
+ (MATCH_R1_ORI | SET_IW_I_B (AT_REGNUM)
+ | SET_IW_I_A (AT_REGNUM)),
+ 4);
dwarf2_emit_insn (4);
fix_new_exp (frag_now, f - frag_now->fr_literal + 4, 4,
&reloc->reloc_expression, 0, BFD_RELOC_NIOS2_LO16);
- md_number_to_chars (f + 8, OP_MATCH_CALLR | 0x08000000, 4);
+ md_number_to_chars (f + 8, MATCH_R1_CALLR | SET_IW_R_A (AT_REGNUM), 4);
dwarf2_emit_insn (4);
}
-/* Output an addi - will silently convert to
- orhi if rA = r0 and (expr & 0xffff0000) == 0. */
-static void
-output_addi (nios2_insn_infoS *insn)
-{
- if (can_evaluate_expr (insn))
- {
- int expr_val = get_expr_value (insn);
- if (GET_INSN_FIELD (RRS, insn->insn_code) == 0
- && (expr_val & 0xffff) == 0
- && expr_val != 0)
- {
- /* We really want a movhi (orhi) here. */
- insn->insn_code = (insn->insn_code & ~OP_MATCH_ADDI) | OP_MATCH_ORHI;
- insn->insn_reloc->reloc_expression.X_add_number =
- (insn->insn_reloc->reloc_expression.X_add_number >> 16) & 0xffff;
- insn->insn_reloc->reloc_type = BFD_RELOC_NIOS2_U16;
- }
- }
-
- /* Output an instruction. */
- output_insn (insn);
-}
-
-static void
-output_andi (nios2_insn_infoS *insn)
-{
- if (can_evaluate_expr (insn))
- {
- int expr_val = get_expr_value (insn);
- if (expr_val != 0 && (expr_val & 0xffff) == 0)
- {
- /* We really want a movhi (orhi) here. */
- insn->insn_code = (insn->insn_code & ~OP_MATCH_ANDI) | OP_MATCH_ANDHI;
- insn->insn_reloc->reloc_expression.X_add_number =
- (insn->insn_reloc->reloc_expression.X_add_number >> 16) & 0xffff;
- insn->insn_reloc->reloc_type = BFD_RELOC_NIOS2_U16;
- }
- }
-
- /* Output an instruction. */
- output_insn (insn);
-}
-
-static void
-output_ori (nios2_insn_infoS *insn)
-{
- if (can_evaluate_expr (insn))
- {
- int expr_val = get_expr_value (insn);
- if (expr_val != 0 && (expr_val & 0xffff) == 0)
- {
- /* We really want a movhi (orhi) here. */
- insn->insn_code = (insn->insn_code & ~OP_MATCH_ORI) | OP_MATCH_ORHI;
- insn->insn_reloc->reloc_expression.X_add_number =
- (insn->insn_reloc->reloc_expression.X_add_number >> 16) & 0xffff;
- insn->insn_reloc->reloc_type = BFD_RELOC_NIOS2_U16;
- }
- }
-
- /* Output an instruction. */
- output_insn (insn);
-}
-
-static void
-output_xori (nios2_insn_infoS *insn)
-{
- if (can_evaluate_expr (insn))
- {
- int expr_val = get_expr_value (insn);
- if (expr_val != 0 && (expr_val & 0xffff) == 0)
- {
- /* We really want a movhi (orhi) here. */
- insn->insn_code = (insn->insn_code & ~OP_MATCH_XORI) | OP_MATCH_XORHI;
- insn->insn_reloc->reloc_expression.X_add_number =
- (insn->insn_reloc->reloc_expression.X_add_number >> 16) & 0xffff;
- insn->insn_reloc->reloc_type = BFD_RELOC_NIOS2_U16;
- }
- }
-
- /* Output an instruction. */
- output_insn (insn);
-}
-
-
/* Output a movhi/addi pair for the movia pseudo-op. */
static void
output_movia (nios2_insn_infoS *insn)
and puts it in the current frag. */
char *f = frag_more (8);
nios2_insn_relocS *reloc = insn->insn_reloc;
- unsigned long reg_index = GET_INSN_FIELD (IRT, insn->insn_code);
+ unsigned long reg_index = GET_IW_I_B (insn->insn_code);
/* If the reloc is NULL, there was an error assembling the movia. */
if (reloc != NULL)
{
md_number_to_chars (f, insn->insn_code, 4);
dwarf2_emit_insn (4);
- md_number_to_chars (f + 4,
- (OP_MATCH_ADDI | (reg_index << OP_SH_IRT)
- | (reg_index << OP_SH_IRS)),
- 4);
- dwarf2_emit_insn (4);
fix_new (frag_now, f - frag_now->fr_literal, 4,
reloc->reloc_expression.X_add_symbol,
reloc->reloc_expression.X_add_number, 0,
BFD_RELOC_NIOS2_HIADJ16);
+ md_number_to_chars (f + 4,
+ (MATCH_R1_ADDI | SET_IW_I_A (reg_index)
+ | SET_IW_I_B (reg_index)),
+ 4);
+ dwarf2_emit_insn (4);
fix_new (frag_now, f + 4 - frag_now->fr_literal, 4,
reloc->reloc_expression.X_add_symbol,
reloc->reloc_expression.X_add_number, 0, BFD_RELOC_NIOS2_LO16);
\f
/** External interfaces. */
+/* Update the selected architecture based on ARCH, giving an error if
+ ARCH is an invalid value. */
+
+static void
+nios2_use_arch (const char *arch)
+{
+ if (strcmp (arch, "nios2") == 0 || strcmp (arch, "r1") == 0)
+ {
+ nios2_architecture |= EF_NIOS2_ARCH_R1;
+ nios2_opcodes = (struct nios2_opcode *) nios2_r1_opcodes;
+ nios2_num_opcodes = nios2_num_r1_opcodes;
+ nop32 = nop_r1;
+ nop16 = NULL;
+ return;
+ }
+ else if (strcmp (arch, "r2") == 0)
+ {
+ nios2_architecture |= EF_NIOS2_ARCH_R2;
+ nios2_opcodes = (struct nios2_opcode *) nios2_r2_opcodes;
+ nios2_num_opcodes = nios2_num_r2_opcodes;
+ nop32 = nop_r2;
+ nop16 = nop_r2_cdx;
+ return;
+ }
+
+ as_bad (_("unknown architecture '%s'"), arch);
+}
+
/* The following functions are called by machine-independent parts of
the assembler. */
int
case OPTION_EL:
target_big_endian = 0;
break;
+ case OPTION_MARCH:
+ nios2_use_arch (arg);
+ break;
default:
return 0;
break;
"branches with jmp sequences (default)\n"
" -no-relax do not replace any branches or calls\n"
" -EB force big-endian byte ordering\n"
- " -EL force little-endian byte ordering\n");
+ " -EL force little-endian byte ordering\n"
+ " -march=ARCH enable instructions from architecture ARCH\n");
}
+
/* This function is called once, at assembler startup time.
It should set up all the tables, etc. that the MD part of the
assembler will need. */
int i;
const char *inserted;
+ switch (nios2_architecture)
+ {
+ default:
+ case EF_NIOS2_ARCH_R1:
+ bfd_default_set_arch_mach (stdoutput, bfd_arch_nios2, bfd_mach_nios2r1);
+ break;
+ case EF_NIOS2_ARCH_R2:
+ if (target_big_endian)
+ as_fatal (_("Big-endian R2 is not supported."));
+ bfd_default_set_arch_mach (stdoutput, bfd_arch_nios2, bfd_mach_nios2r2);
+ break;
+ }
+
/* Create and fill a hashtable for the Nios II opcodes, registers and
arguments. */
nios2_opcode_hash = hash_new ();
nios2_reg_hash = hash_new ();
- nios2_arg_hash = hash_new ();
nios2_ps_hash = hash_new ();
- for (i = 0; i < NUMOPCODES; ++i)
+ for (i = 0; i < nios2_num_opcodes; ++i)
{
inserted
= hash_insert (nios2_opcode_hash, nios2_opcodes[i].name,
}
- for (i = 0; i < nios2_num_arg_info_structs; ++i)
- {
- inserted
- = hash_insert (nios2_arg_hash, nios2_arg_info_structs[i].args,
- (PTR) & nios2_arg_info_structs[i]);
- if (inserted != NULL)
- {
- fprintf (stderr, _("internal error: can't hash `%s': %s\n"),
- nios2_arg_info_structs[i].args, inserted);
- /* Probably a memory allocation problem? Give up now. */
- as_fatal (_("Broken assembler. No assembly attempted."));
- }
- }
-
for (i = 0; i < nios2_num_ps_insn_info_structs; ++i)
{
inserted
{
char *argstr;
char *op_strdup = NULL;
- nios2_arg_infoS *arg_info;
unsigned long saved_pinfo = 0;
nios2_insn_infoS thisinsn;
nios2_insn_infoS *insn = &thisinsn;
nios2_ps_insn_infoS *ps_insn = NULL;
/* Set the opcode for the instruction. */
insn->insn_code = insn->insn_nios2_opcode->match;
+ insn->constant_bits = 0;
/* Parse the arguments pointed to by argstr. */
if (nios2_mode == NIOS2_MODE_ASSEMBLE)
== NIOS2_INSN_MACRO)
ps_insn = nios2_translate_pseudo_insn (insn);
- /* Find the assemble function, and call it. */
- arg_info = nios2_arg_lookup (insn->insn_nios2_opcode->args);
- if (arg_info != NULL)
- {
- arg_info->assemble_args_func (insn);
-
- if (nios2_as_options.relax != relax_none
- && !nios2_as_options.noat
- && insn->insn_nios2_opcode->pinfo & NIOS2_INSN_UBRANCH)
- output_ubranch (insn);
- else if (nios2_as_options.relax != relax_none
- && !nios2_as_options.noat
- && insn->insn_nios2_opcode->pinfo & NIOS2_INSN_CBRANCH)
- output_cbranch (insn);
- else if (nios2_as_options.relax == relax_all
- && !nios2_as_options.noat
- && insn->insn_nios2_opcode->pinfo & NIOS2_INSN_CALL
- && insn->insn_reloc
- && ((insn->insn_reloc->reloc_type
- == BFD_RELOC_NIOS2_CALL26)
- || (insn->insn_reloc->reloc_type
- == BFD_RELOC_NIOS2_CALL26_NOAT)))
- output_call (insn);
- else if (insn->insn_nios2_opcode->pinfo & NIOS2_INSN_ANDI)
- output_andi (insn);
- else if (insn->insn_nios2_opcode->pinfo & NIOS2_INSN_ORI)
- output_ori (insn);
- else if (insn->insn_nios2_opcode->pinfo & NIOS2_INSN_XORI)
- output_xori (insn);
- else if (insn->insn_nios2_opcode->pinfo & NIOS2_INSN_ADDI)
- output_addi (insn);
- else if (saved_pinfo == NIOS2_INSN_MACRO_MOVIA)
- output_movia (insn);
- else
- output_insn (insn);
- if (ps_insn)
- nios2_cleanup_pseudo_insn (insn, ps_insn);
- }
+ /* Assemble the parsed arguments into the instruction word. */
+ nios2_assemble_args (insn);
+
+ /* Handle relaxation and other transformations. */
+ if (nios2_as_options.relax != relax_none
+ && !nios2_as_options.noat
+ && insn->insn_nios2_opcode->pinfo & NIOS2_INSN_UBRANCH)
+ output_ubranch (insn);
+ else if (nios2_as_options.relax != relax_none
+ && !nios2_as_options.noat
+ && insn->insn_nios2_opcode->pinfo & NIOS2_INSN_CBRANCH)
+ output_cbranch (insn);
+ else if (nios2_as_options.relax == relax_all
+ && !nios2_as_options.noat
+ && insn->insn_nios2_opcode->pinfo & NIOS2_INSN_CALL
+ && insn->insn_reloc
+ && ((insn->insn_reloc->reloc_type
+ == BFD_RELOC_NIOS2_CALL26)
+ || (insn->insn_reloc->reloc_type
+ == BFD_RELOC_NIOS2_CALL26_NOAT)))
+ output_call (insn);
+ else if (saved_pinfo == NIOS2_INSN_MACRO_MOVIA)
+ output_movia (insn);
else
- {
- /* The assembler is broken. */
- fprintf (stderr,
- _("internal error: %s is not a valid argument syntax\n"),
- insn->insn_nios2_opcode->args);
- /* Probably a memory allocation problem. Give up now. */
- as_fatal (_("Broken assembler. No assembly attempted."));
- }
+ output_insn (insn);
+ if (ps_insn)
+ nios2_cleanup_pseudo_insn (insn, ps_insn);
}
else
/* Unrecognised instruction - error. */
}
/* Implement TC_PARSE_CONS_EXPRESSION to handle %tls_ldo(...) */
-static int nios2_tls_ldo_reloc;
-
-void
+bfd_reloc_code_real_type
nios2_cons (expressionS *exp, int size)
{
- nios2_tls_ldo_reloc = 0;
+ bfd_reloc_code_real_type nios2_tls_ldo_reloc = BFD_RELOC_NONE;
SKIP_WHITESPACE ();
if (input_line_pointer[0] == '%')
else
{
input_line_pointer += 8;
- nios2_tls_ldo_reloc = 1;
+ nios2_tls_ldo_reloc = BFD_RELOC_NIOS2_TLS_DTPREL;
}
}
- if (nios2_tls_ldo_reloc)
+ if (nios2_tls_ldo_reloc != BFD_RELOC_NONE)
{
SKIP_WHITESPACE ();
if (input_line_pointer[0] != '(')
}
}
}
- if (!nios2_tls_ldo_reloc)
+ if (nios2_tls_ldo_reloc == BFD_RELOC_NONE)
expression (exp);
-}
-
-/* Implement TC_CONS_FIX_NEW. */
-void
-nios2_cons_fix_new (fragS *frag, int where, unsigned int nbytes,
- expressionS *exp)
-{
- bfd_reloc_code_real_type r;
-
- r = (nbytes == 1 ? BFD_RELOC_8
- : (nbytes == 2 ? BFD_RELOC_16
- : (nbytes == 4 ? BFD_RELOC_32 : BFD_RELOC_64)));
-
- if (nios2_tls_ldo_reloc)
- r = BFD_RELOC_NIOS2_TLS_DTPREL;
-
- fix_new_exp (frag, where, (int) nbytes, exp, 0, r);
- nios2_tls_ldo_reloc = 0;
+ return nios2_tls_ldo_reloc;
}
/* Implement HANDLE_ALIGN. */
{
cfi_add_CFA_def_cfa (27, 0);
}
+
+#ifdef OBJ_ELF
+/* Some special processing for a Nios II ELF file. */
+
+void
+nios2_elf_final_processing (void)
+{
+ elf_elfheader (stdoutput)->e_flags = nios2_architecture;
+}
+#endif
projects / deliverable / binutils-gdb.git / blobdiff