diff options
Diffstat (limited to 'opcodes/micromips-opc.c')
| -rw-r--r-- | opcodes/micromips-opc.c | 149 |
1 files changed, 148 insertions, 1 deletions
diff --git a/opcodes/micromips-opc.c b/opcodes/micromips-opc.c index de8053c..8630769 100644 --- a/opcodes/micromips-opc.c +++ b/opcodes/micromips-opc.c @@ -20,8 +20,155 @@ MA 02110-1301, USA. */ #include "sysdep.h" -#include <stdio.h> #include "opcode/mips.h" +#include "mips-formats.h" + +static unsigned char reg_0_map[] = { 0 }; +static unsigned char reg_28_map[] = { 28 }; +static unsigned char reg_29_map[] = { 29 }; +static unsigned char reg_31_map[] = { 31 }; +static unsigned char reg_m16_map[] = { 16, 17, 2, 3, 4, 5, 6, 7 }; +static unsigned char reg_mn_map[] = { 0, 17, 2, 3, 16, 18, 19, 20 }; +static unsigned char reg_q_map[] = { 0, 17, 2, 3, 4, 5, 6, 7 }; + +static unsigned char reg_h_map1[] = { 5, 5, 6, 4, 4, 4, 4, 4 }; +static unsigned char reg_h_map2[] = { 6, 7, 7, 21, 22, 5, 6, 7 }; + +static int int_b_map[] = { + 1, 4, 8, 12, 16, 20, 24, -1 +}; +static int int_c_map[] = { + 128, 1, 2, 3, 4, 7, 8, 15, 16, 31, 32, 63, 64, 255, 32768, 65535 +}; + +/* Return the mips_operand structure for the operand at the beginning of P. */ + +const struct mips_operand * +decode_micromips_operand (const char *p) +{ + switch (p[0]) + { + case 'm': + switch (p[1]) + { + case 'a': MAPPED_REG (0, 0, GP, reg_28_map); + case 'b': MAPPED_REG (3, 23, GP, reg_m16_map); + case 'c': MAPPED_REG (3, 4, GP, reg_m16_map); + case 'd': MAPPED_REG (3, 7, GP, reg_m16_map); + case 'e': MAPPED_REG (3, 1, GP, reg_m16_map); + case 'f': MAPPED_REG (3, 3, GP, reg_m16_map); + case 'g': MAPPED_REG (3, 0, GP, reg_m16_map); + case 'h': REG_PAIR (3, 7, GP, reg_h_map); + case 'j': REG (5, 0, GP); + case 'l': MAPPED_REG (3, 4, GP, reg_m16_map); + case 'm': MAPPED_REG (3, 1, GP, reg_mn_map); + case 'n': MAPPED_REG (3, 4, GP, reg_mn_map); + case 'p': REG (5, 5, GP); + case 'q': MAPPED_REG (3, 7, GP, reg_q_map); + case 'r': SPECIAL (0, 0, PC); + case 's': MAPPED_REG (0, 0, GP, reg_29_map); + case 't': SPECIAL (0, 0, REPEAT_PREV_REG); + case 'x': SPECIAL (0, 0, REPEAT_DEST_REG); + case 'y': MAPPED_REG (0, 0, GP, reg_31_map); + case 'z': MAPPED_REG (0, 0, GP, reg_0_map); + + case 'A': INT_ADJ (7, 0, 63, 2, FALSE); /* (-64 .. 63) << 2 */ + case 'B': MAPPED_INT (3, 1, int_b_map, FALSE); + case 'C': MAPPED_INT (4, 0, int_c_map, TRUE); + case 'D': BRANCH (10, 0, 1); + case 'E': BRANCH (7, 0, 1); + case 'F': HINT (4, 0); + case 'G': INT_ADJ (4, 0, 14, 0, FALSE); /* (-1 .. 14) */ + case 'H': INT_ADJ (4, 0, 15, 1, FALSE); /* (0 .. 15) << 1 */ + case 'I': INT_ADJ (7, 0, 126, 0, FALSE); /* (-1 .. 126) */ + case 'J': INT_ADJ (4, 0, 15, 2, FALSE); /* (0 .. 15) << 2 */ + case 'L': INT_ADJ (4, 0, 15, 0, FALSE); /* (0 .. 15) */ + case 'M': INT_ADJ (3, 1, 8, 0, FALSE); /* (1 .. 8) */ + case 'N': SPECIAL (2, 4, LWM_SWM_LIST); + case 'O': HINT (4, 0); + case 'P': INT_ADJ (5, 0, 31, 2, FALSE); /* (0 .. 31) << 2 */ + case 'Q': INT_ADJ (23, 0, 4194303, 2, FALSE); + /* (-4194304 .. 4194303) */ + case 'U': INT_ADJ (5, 0, 31, 2, FALSE); /* (0 .. 31) << 2 */ + case 'W': INT_ADJ (6, 1, 63, 2, FALSE); /* (0 .. 63) << 2 */ + case 'X': SINT (4, 1); + case 'Y': SPECIAL (9, 1, ADDIUSP_INT); + case 'Z': UINT (0, 0); /* 0 only */ + } + break; + + case '+': + switch (p[1]) + { + case 'A': BIT (5, 6, 0); /* (0 .. 31) */ + case 'B': MSB (5, 11, 1, TRUE, 32); /* (1 .. 32), 32-bit op */ + case 'C': MSB (5, 11, 1, FALSE, 32); /* (1 .. 32), 32-bit op */ + case 'E': BIT (5, 6, 32); /* (32 .. 63) */ + case 'F': MSB (5, 11, 33, TRUE, 64); /* (33 .. 64), 64-bit op */ + case 'G': MSB (5, 11, 33, FALSE, 64); /* (33 .. 64), 64-bit op */ + case 'H': MSB (5, 11, 1, FALSE, 64); /* (1 .. 32), 64-bit op */ + + case 'i': JALX (26, 0, 2); + case 'j': SINT (9, 0); + } + break; + + case '.': SINT (10, 6); + case '<': BIT (5, 11, 0); /* (0 .. 31) */ + case '>': BIT (5, 11, 32); /* (32 .. 63) */ + case '\\': BIT (3, 21, 0); /* (0 .. 7) */ + case '|': HINT (4, 12); + case '~': SINT (12, 0); + case '@': SINT (10, 16); + case '^': HINT (5, 11); + + case '0': SINT (6, 16); + case '1': HINT (5, 16); + case '2': HINT (2, 14); + case '3': HINT (3, 13); + case '4': HINT (4, 12); + case '5': HINT (8, 13); + case '6': HINT (5, 16); + case '7': REG (2, 14, ACC); + case '8': HINT (6, 14); + + case 'B': HINT (10, 16); + case 'C': HINT (23, 3); + case 'D': REG (5, 11, FP); + case 'E': REG (5, 21, COPRO); + case 'G': REG (5, 16, COPRO); + case 'K': REG (5, 16, HW); + case 'H': UINT (3, 11); + case 'M': REG (3, 13, CCC); + case 'N': REG (3, 18, CCC); + case 'R': REG (5, 6, FP); + case 'S': REG (5, 16, FP); + case 'T': REG (5, 21, FP); + case 'V': REG (5, 16, FP); + + case 'a': JUMP (26, 0, 1); + case 'b': REG (5, 16, GP); + case 'c': HINT (10, 16); + case 'd': REG (5, 11, GP); + case 'h': HINT (5, 11); + case 'i': HINT (16, 0); + case 'j': SINT (16, 0); + case 'k': HINT (5, 21); + case 'n': SPECIAL (5, 21, LWM_SWM_LIST); + case 'o': SINT (16, 0); + case 'p': BRANCH (16, 0, 1); + case 'q': HINT (10, 6); + case 'r': REG (5, 16, GP); + case 's': REG (5, 16, GP); + case 't': REG (5, 21, GP); + case 'u': HINT (16, 0); + case 'v': REG (5, 16, GP); + case 'w': REG (5, 21, GP); + case 'y': REG (5, 6, GP); + case 'z': MAPPED_REG (0, 0, GP, reg_0_map); + } + return 0; +} #define UBD INSN_UNCOND_BRANCH_DELAY #define CBD INSN_COND_BRANCH_DELAY |