diff options
Diffstat (limited to 'cpu/m32r.opc')
| -rw-r--r-- | cpu/m32r.opc | 54 |
1 files changed, 47 insertions, 7 deletions
diff --git a/cpu/m32r.opc b/cpu/m32r.opc index dbb6f1d..6764223 100644 --- a/cpu/m32r.opc +++ b/cpu/m32r.opc @@ -27,7 +27,6 @@ */ - /* This file is an addendum to m32r.cpu. Heavy use of C code isn't appropriate in .cpu files, so it resides here. This especially applies to assembly/disassembly where parsing/printing can be quite involved. @@ -49,6 +48,7 @@ #undef CGEN_DIS_HASH_SIZE #define CGEN_DIS_HASH_SIZE 256 #undef CGEN_DIS_HASH +#if 0 #define X(b) (((unsigned char *) (b))[0] & 0xf0) #define CGEN_DIS_HASH(buffer, value) \ (X (buffer) | \ @@ -56,9 +56,39 @@ : X (buffer) == 0x70 || X (buffer) == 0xf0 ? (((unsigned char *) (buffer))[0] & 0xf) \ : X (buffer) == 0x30 ? ((((unsigned char *) (buffer))[1] & 0x70) >> 4) \ : ((((unsigned char *) (buffer))[1] & 0xf0) >> 4))) +#else +#define CGEN_DIS_HASH(buffer, value) m32r_cgen_dis_hash(buffer, value) +extern unsigned int m32r_cgen_dis_hash(const char *, CGEN_INSN_INT); +#endif /* -- */ +/* -- opc.c */ +unsigned int +m32r_cgen_dis_hash (buf, value) + const char * buf ATTRIBUTE_UNUSED; + CGEN_INSN_INT value; +{ + unsigned int x; + + if (value & 0xffff0000) /* 32bit instructions */ + value = (value >> 16) & 0xffff; + + x = (value>>8) & 0xf0; + if (x == 0x40 || x == 0xe0 || x == 0x60 || x == 0x50) + return x; + + if (x == 0x70 || x == 0xf0) + return x | ((value>>8) & 0x0f); + + if (x == 0x30) + return x | ((value & 0x70) >> 4); + else + return x | ((value & 0xf0) >> 4); +} + +/* -- */ + /* -- asm.c */ static const char * parse_hash PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *)); @@ -159,7 +189,11 @@ parse_slo16 (cd, strp, opindex, valuep) ++*strp; if (errmsg == NULL && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) - value &= 0xffff; + { + value &= 0xffff; + if (value & 0x8000) + value |= 0xffff0000; + } *valuep = value; return errmsg; } @@ -259,10 +293,13 @@ my_print_insn (cd, pc, info) char *buf = buffer; int status; int buflen = (pc & 3) == 0 ? 4 : 2; + int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG; + char *x; /* Read the base part of the insn. */ - status = (*info->read_memory_func) (pc, buf, buflen, info); + status = (*info->read_memory_func) (pc - ((!big_p && (pc & 3) != 0) ? 2 : 0), + buf, buflen, info); if (status != 0) { (*info->memory_error_func) (status, pc, info); @@ -270,22 +307,25 @@ my_print_insn (cd, pc, info) } /* 32 bit insn? */ - if ((pc & 3) == 0 && (buf[0] & 0x80) != 0) + x = (big_p ? &buf[0] : &buf[3]); + if ((pc & 3) == 0 && (*x & 0x80) != 0) return print_insn (cd, pc, info, buf, buflen); /* Print the first insn. */ if ((pc & 3) == 0) { + buf += (big_p ? 0 : 2); if (print_insn (cd, pc, info, buf, 2) == 0) (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); - buf += 2; + buf += (big_p ? 2 : -2); } - if (buf[0] & 0x80) + x = (big_p ? &buf[0] : &buf[1]); + if (*x & 0x80) { /* Parallel. */ (*info->fprintf_func) (info->stream, " || "); - buf[0] &= 0x7f; + *x &= 0x7f; } else (*info->fprintf_func) (info->stream, " -> "); |