/* Nios II opcode list for GAS, the GNU assembler.
- Copyright (C) 2012-2015 Free Software Foundation, Inc.
+ Copyright (C) 2012-2019 Free Software Foundation, Inc.
Contributed by Nigel Gray (ngray@altera.com).
Contributed by Mentor Graphics, Inc.
- This file is part of GAS, the GNU Assembler, and GDB, the GNU disassembler.
+ This file is part of the GNU opcodes library.
GAS/GDB is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "bfd.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
+
/****************************************************************************
* This file contains structures, bit masks and shift counts used
* by the GNU toolchain to define the Nios II instruction set and
/* Instruction encoding formats. */
enum iw_format_type {
- /* R1 formats */
+ /* R1 formats. */
iw_i_type,
iw_r_type,
iw_j_type,
- iw_custom_type
+ iw_custom_type,
+
+ /* 32-bit R2 formats. */
+ iw_L26_type,
+ iw_F2I16_type,
+ iw_F2X4I12_type,
+ iw_F1X4I12_type,
+ iw_F1X4L17_type,
+ iw_F3X6L5_type,
+ iw_F2X6L10_type,
+ iw_F3X6_type,
+ iw_F3X8_type,
+
+ /* 16-bit R2 formats. */
+ iw_I10_type,
+ iw_T1I7_type,
+ iw_T2I4_type,
+ iw_T1X1I6_type,
+ iw_X1I7_type,
+ iw_L5I4X1_type,
+ iw_T2X1L3_type,
+ iw_T2X1I3_type,
+ iw_T3X1_type,
+ iw_T2X3_type,
+ iw_F1X1_type,
+ iw_X2L5_type,
+ iw_F1I5_type,
+ iw_F2_type
};
/* Identify different overflow situations for error messages. */
signed_immed16_overflow,
unsigned_immed16_overflow,
unsigned_immed5_overflow,
+ signed_immed12_overflow,
custom_opcode_overflow,
+ enumeration_overflow,
no_overflow
};
d - a 5-bit destination register index
s - a 5-bit left source register index
t - a 5-bit right source register index
+ D - a 3-bit encoded destination register
+ S - a 3-bit encoded left source register
+ T - a 3-bit encoded right source register
i - a 16-bit signed immediate
- u - a 16-bit unsigned immediate
- o - a 16-bit signed program counter relative offset
j - a 5-bit unsigned immediate
+ k - a (second) 5-bit unsigned immediate
l - a 8-bit custom instruction constant
m - a 26-bit unsigned immediate
+ o - a 16-bit signed pc-relative offset
+ u - a 16-bit unsigned immediate
+ I - a 12-bit signed immediate
+ M - a 6-bit unsigned immediate
+ N - a 6-bit unsigned immediate with 2-bit shift
+ O - a 10-bit signed pc-relative offset with 1-bit shift
+ P - a 7-bit signed pc-relative offset with 1-bit shift
+ U - a 7-bit unsigned immediate with 2-bit shift
+ V - a 5-bit unsigned immediate with 2-bit shift
+ W - a 4-bit unsigned immediate with 2-bit shift
+ X - a 4-bit unsigned immediate with 1-bit shift
+ Y - a 4-bit unsigned immediate
+ e - an immediate coded as an enumeration for addi.n/subi.n
+ f - an immediate coded as an enumeration for slli.n/srli.n
+ g - an immediate coded as an enumeration for andi.n
+ h - an immediate coded as an enumeration for movi.n
+ R - a reglist for ldwm/stwm or push.n/pop.n
+ B - a base register specifier and option list for ldwm/stwm
Literal ',', '(', and ')' characters may also appear in the args as
delimiters.
#define REG_NORMAL (1<<0) /* Normal registers. */
#define REG_CONTROL (1<<1) /* Control registers. */
#define REG_COPROCESSOR (1<<2) /* For custom instructions. */
+#define REG_3BIT (1<<3) /* For R2 CDX instructions. */
+#define REG_LDWM (1<<4) /* For R2 ldwm/stwm. */
+#define REG_POP (1<<5) /* For R2 pop.n/push.n. */
struct nios2_reg
{
/* Pull in the instruction field accessors, opcodes, and masks. */
#include "nios2r1.h"
+#include "nios2r2.h"
/* These are the data structures used to hold the instruction information. */
extern const struct nios2_opcode nios2_r1_opcodes[];
extern const int nios2_num_r1_opcodes;
+extern const struct nios2_opcode nios2_r2_opcodes[];
+extern const int nios2_num_r2_opcodes;
extern struct nios2_opcode *nios2_opcodes;
extern int nios2_num_opcodes;
extern const struct nios2_opcode *
nios2_find_opcode_hash (unsigned long, unsigned long);
+/* Lookup tables for R2 immediate decodings. */
+extern unsigned int nios2_r2_asi_n_mappings[];
+extern const int nios2_num_r2_asi_n_mappings;
+extern unsigned int nios2_r2_shi_n_mappings[];
+extern const int nios2_num_r2_shi_n_mappings;
+extern unsigned int nios2_r2_andi_n_mappings[];
+extern const int nios2_num_r2_andi_n_mappings;
+
+/* Lookup table for 3-bit register decodings. */
+extern int nios2_r2_reg3_mappings[];
+extern const int nios2_num_r2_reg3_mappings;
+
+/* Lookup table for REG_RANGE value list decodings. */
+extern unsigned long nios2_r2_reg_range_mappings[];
+extern const int nios2_num_r2_reg_range_mappings;
+
+#ifdef __cplusplus
+}
+#endif
+
#endif /* _NIOS2_H */
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