diff options
Diffstat (limited to 'arch/powerpc/xmon/ppc-dis.c')
| -rw-r--r-- | arch/powerpc/xmon/ppc-dis.c | 260 |
1 files changed, 182 insertions, 78 deletions
diff --git a/arch/powerpc/xmon/ppc-dis.c b/arch/powerpc/xmon/ppc-dis.c index ee9891734149..31db8c072acd 100644 --- a/arch/powerpc/xmon/ppc-dis.c +++ b/arch/powerpc/xmon/ppc-dis.c @@ -1,6 +1,5 @@ /* ppc-dis.c -- Disassemble PowerPC instructions - Copyright 1994, 1995, 2000, 2001, 2002, 2003, 2004, 2005, 2006 - Free Software Foundation, Inc. + Copyright (C) 1994-2016 Free Software Foundation, Inc. Written by Ian Lance Taylor, Cygnus Support This file is part of GDB, GAS, and the GNU binutils. @@ -26,57 +25,94 @@ Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, US #include "ppc.h" #include "dis-asm.h" -/* Print a PowerPC or POWER instruction. */ +/* This file provides several disassembler functions, all of which use + the disassembler interface defined in dis-asm.h. Several functions + are provided because this file handles disassembly for the PowerPC + in both big and little endian mode and also for the POWER (RS/6000) + chip. */ + +/* Extract the operand value from the PowerPC or POWER instruction. */ -int -print_insn_powerpc (unsigned long insn, unsigned long memaddr) +static long +operand_value_powerpc (const struct powerpc_operand *operand, + unsigned long insn, ppc_cpu_t dialect) { - const struct powerpc_opcode *opcode; - const struct powerpc_opcode *opcode_end; - unsigned long op; - int dialect; + long value; + int invalid; + /* Extract the value from the instruction. */ + if (operand->extract) + value = (*operand->extract) (insn, dialect, &invalid); + else + { + if (operand->shift >= 0) + value = (insn >> operand->shift) & operand->bitm; + else + value = (insn << -operand->shift) & operand->bitm; + if ((operand->flags & PPC_OPERAND_SIGNED) != 0) + { + /* BITM is always some number of zeros followed by some + number of ones, followed by some number of zeros. */ + unsigned long top = operand->bitm; + /* top & -top gives the rightmost 1 bit, so this + fills in any trailing zeros. */ + top |= (top & -top) - 1; + top &= ~(top >> 1); + value = (value ^ top) - top; + } + } - dialect = PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_COMMON - | PPC_OPCODE_64 | PPC_OPCODE_POWER4 | PPC_OPCODE_ALTIVEC; + return value; +} - if (cpu_has_feature(CPU_FTRS_POWER5)) - dialect |= PPC_OPCODE_POWER5; +/* Determine whether the optional operand(s) should be printed. */ - if (cpu_has_feature(CPU_FTRS_CELL)) - dialect |= PPC_OPCODE_CELL | PPC_OPCODE_ALTIVEC; +static int +skip_optional_operands (const unsigned char *opindex, + unsigned long insn, ppc_cpu_t dialect) +{ + const struct powerpc_operand *operand; - if (cpu_has_feature(CPU_FTRS_POWER6)) - dialect |= PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_ALTIVEC; + for (; *opindex != 0; opindex++) + { + operand = &powerpc_operands[*opindex]; + if ((operand->flags & PPC_OPERAND_NEXT) != 0 + || ((operand->flags & PPC_OPERAND_OPTIONAL) != 0 + && operand_value_powerpc (operand, insn, dialect) != + ppc_optional_operand_value (operand))) + return 0; + } + + return 1; +} + +/* Find a match for INSN in the opcode table, given machine DIALECT. + A DIALECT of -1 is special, matching all machine opcode variations. */ + +static const struct powerpc_opcode * +lookup_powerpc (unsigned long insn, ppc_cpu_t dialect) +{ + const struct powerpc_opcode *opcode; + const struct powerpc_opcode *opcode_end; + unsigned long op; /* Get the major opcode of the instruction. */ op = PPC_OP (insn); - /* Find the first match in the opcode table. We could speed this up - a bit by doing a binary search on the major opcode. */ opcode_end = powerpc_opcodes + powerpc_num_opcodes; - again: - for (opcode = powerpc_opcodes; opcode < opcode_end; opcode++) + /* Find the first match in the opcode table for this major opcode. */ + for (opcode = powerpc_opcodes; opcode < opcode_end; ++opcode) { - unsigned long table_op; const unsigned char *opindex; const struct powerpc_operand *operand; int invalid; - int need_comma; - int need_paren; - - table_op = PPC_OP (opcode->opcode); - if (op < table_op) - break; - if (op > table_op) - continue; if ((insn & opcode->mask) != opcode->opcode - || (opcode->flags & dialect) == 0) + || (dialect != (ppc_cpu_t) -1 + && ((opcode->flags & dialect) == 0 + || (opcode->deprecated & dialect) != 0))) continue; - /* Make two passes over the operands. First see if any of them - have extraction functions, and, if they do, make sure the - instruction is valid. */ + /* Check validity of operands. */ invalid = 0; for (opindex = opcode->operands; *opindex != 0; opindex++) { @@ -87,14 +123,77 @@ print_insn_powerpc (unsigned long insn, unsigned long memaddr) if (invalid) continue; - /* The instruction is valid. */ - printf("%s", opcode->name); + return opcode; + } + + return NULL; +} + +/* Print a PowerPC or POWER instruction. */ + +int print_insn_powerpc (unsigned long insn, unsigned long memaddr) +{ + const struct powerpc_opcode *opcode; + bool insn_is_short; + ppc_cpu_t dialect; + + dialect = PPC_OPCODE_PPC | PPC_OPCODE_COMMON + | PPC_OPCODE_64 | PPC_OPCODE_POWER4 | PPC_OPCODE_ALTIVEC; + + if (cpu_has_feature(CPU_FTRS_POWER5)) + dialect |= PPC_OPCODE_POWER5; + + if (cpu_has_feature(CPU_FTRS_CELL)) + dialect |= (PPC_OPCODE_CELL | PPC_OPCODE_ALTIVEC); + + if (cpu_has_feature(CPU_FTRS_POWER6)) + dialect |= (PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_ALTIVEC); + + if (cpu_has_feature(CPU_FTRS_POWER7)) + dialect |= (PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_POWER7 + | PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX); + + if (cpu_has_feature(CPU_FTRS_POWER8)) + dialect |= (PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_POWER7 + | PPC_OPCODE_POWER8 | PPC_OPCODE_HTM + | PPC_OPCODE_ALTIVEC | PPC_OPCODE_ALTIVEC2 | PPC_OPCODE_VSX); + + if (cpu_has_feature(CPU_FTRS_POWER9)) + dialect |= (PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_POWER7 + | PPC_OPCODE_POWER8 | PPC_OPCODE_POWER9 | PPC_OPCODE_HTM + | PPC_OPCODE_ALTIVEC | PPC_OPCODE_ALTIVEC2 + | PPC_OPCODE_VSX | PPC_OPCODE_VSX3), + + /* Get the major opcode of the insn. */ + opcode = NULL; + insn_is_short = false; + + if (opcode == NULL) + opcode = lookup_powerpc (insn, dialect); + if (opcode == NULL && (dialect & PPC_OPCODE_ANY) != 0) + opcode = lookup_powerpc (insn, (ppc_cpu_t) -1); + + if (opcode != NULL) + { + const unsigned char *opindex; + const struct powerpc_operand *operand; + int need_comma; + int need_paren; + int skip_optional; + if (opcode->operands[0] != 0) - printf("\t"); + printf("%-7s ", opcode->name); + else + printf("%s", opcode->name); + + if (insn_is_short) + /* The operands will be fetched out of the 16-bit instruction. */ + insn >>= 16; /* Now extract and print the operands. */ need_comma = 0; need_paren = 0; + skip_optional = -1; for (opindex = opcode->operands; *opindex != 0; opindex++) { long value; @@ -107,23 +206,18 @@ print_insn_powerpc (unsigned long insn, unsigned long memaddr) if ((operand->flags & PPC_OPERAND_FAKE) != 0) continue; - /* Extract the value from the instruction. */ - if (operand->extract) - value = (*operand->extract) (insn, dialect, &invalid); - else + /* If all of the optional operands have the value zero, + then don't print any of them. */ + if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0) { - value = (insn >> operand->shift) & ((1 << operand->bits) - 1); - if ((operand->flags & PPC_OPERAND_SIGNED) != 0 - && (value & (1 << (operand->bits - 1))) != 0) - value -= 1 << operand->bits; + if (skip_optional < 0) + skip_optional = skip_optional_operands (opindex, insn, + dialect); + if (skip_optional) + continue; } - /* If the operand is optional, and the value is zero, don't - print anything. */ - if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0 - && (operand->flags & PPC_OPERAND_NEXT) == 0 - && value == 0) - continue; + value = operand_value_powerpc (operand, insn, dialect); if (need_comma) { @@ -139,30 +233,38 @@ print_insn_powerpc (unsigned long insn, unsigned long memaddr) printf("f%ld", value); else if ((operand->flags & PPC_OPERAND_VR) != 0) printf("v%ld", value); + else if ((operand->flags & PPC_OPERAND_VSR) != 0) + printf("vs%ld", value); else if ((operand->flags & PPC_OPERAND_RELATIVE) != 0) - print_address (memaddr + value); + print_address(memaddr + value); else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0) - print_address (value & 0xffffffff); - else if ((operand->flags & PPC_OPERAND_CR) == 0 - || (dialect & PPC_OPCODE_PPC) == 0) + print_address(value & 0xffffffff); + else if ((operand->flags & PPC_OPERAND_FSL) != 0) + printf("fsl%ld", value); + else if ((operand->flags & PPC_OPERAND_FCR) != 0) + printf("fcr%ld", value); + else if ((operand->flags & PPC_OPERAND_UDI) != 0) printf("%ld", value); - else + else if ((operand->flags & PPC_OPERAND_CR_REG) != 0 + && (((dialect & PPC_OPCODE_PPC) != 0) + || ((dialect & PPC_OPCODE_VLE) != 0))) + printf("cr%ld", value); + else if (((operand->flags & PPC_OPERAND_CR_BIT) != 0) + && (((dialect & PPC_OPCODE_PPC) != 0) + || ((dialect & PPC_OPCODE_VLE) != 0))) { - if (operand->bits == 3) - printf("cr%ld", value); - else - { - static const char *cbnames[4] = { "lt", "gt", "eq", "so" }; - int cr; - int cc; - - cr = value >> 2; - if (cr != 0) - printf("4*cr%d+", cr); - cc = value & 3; - printf("%s", cbnames[cc]); - } + static const char *cbnames[4] = { "lt", "gt", "eq", "so" }; + int cr; + int cc; + + cr = value >> 2; + if (cr != 0) + printf("4*cr%d+", cr); + cc = value & 3; + printf("%s", cbnames[cc]); } + else + printf("%d", (int) value); if (need_paren) { @@ -179,14 +281,16 @@ print_insn_powerpc (unsigned long insn, unsigned long memaddr) } } - /* We have found and printed an instruction; return. */ - return 4; - } - - if ((dialect & PPC_OPCODE_ANY) != 0) - { - dialect = ~PPC_OPCODE_ANY; - goto again; + /* We have found and printed an instruction. + If it was a short VLE instruction we have more to do. */ + if (insn_is_short) + { + memaddr += 2; + return 2; + } + else + /* Otherwise, return. */ + return 4; } /* We could not find a match. */ |