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sim: bfin: more parallel insn checks

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Now that we keep track of the exact parallel insn slot we're in, we can
make sure that the current insn being decoded is valid for that slot.
This brings us much closer to the hardware in flagging invalid parallel
insn combinations.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2012-04-09 03:59:10 +00:00
parent 99265d6b00
commit ab04c00066
2 changed files with 84 additions and 18 deletions
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18
sim/bfin/ChangeLog
View file

@ -1,3 +1,21 @@
2012-04-08 Mike Frysinger <vapier@gentoo.org>
* bfin-sim.c (illegal_instruction_or_combination): New helper.
(decode_ProgCtrl_0): Call illegal_instruction_or_combination instead
of illegal_instruction.
(decode_PushPopReg_0, decode_CCflag_0, decode_CC2dreg_0,
decode_LDSTpmod_0, decode_dagMODim_0, decode_dagMODik_0,
decode_dspLDST_0, decode_LDST_0, _interp_insn_bfin): Likewise.
(decode_PushPopMultiple_0): Call illegal_instruction_combination when
PARALLEL_GROUP is not BFIN_PARALLEL_NONE.
(decode_CCflag_0, decode_REGMV_0, decode_ALU2op_0, decode_PTR2op_0,
decode_COMPI2opD_0, decode_COMPI2opP_0): Likewise.
(decode_CC2stat_0): Check PARALLEL_GROUP before cbit.
(decode_LDSTpmod_0): Call illegal_instruction_combination when
PARALLEL_GROUP is BFIN_PARALLEL_GROUP2.
(decode_dagMODim_0, decode_dagMODik_0, decode_LDST_0,
decode_LDSTiiFP_0, decode_LDSTii_0): Likewise.
2012-04-08 Mike Frysinger <vapier@gentoo.org>
* bfin-sim.h (bfin_parallel_group): New enum.

84
sim/bfin/bfin-sim.c
View file

@ -51,6 +51,15 @@ illegal_instruction_combination (SIM_CPU *cpu)
cec_exception (cpu, VEC_ILGAL_I);
}
static __attribute__ ((noreturn)) void
illegal_instruction_or_combination (SIM_CPU *cpu)
{
if (PARALLEL_GROUP != BFIN_PARALLEL_NONE)
illegal_instruction_combination (cpu);
else
illegal_instruction (cpu);
}
static __attribute__ ((noreturn)) void
unhandled_instruction (SIM_CPU *cpu, const char *insn)
{
@ -1975,7 +1984,7 @@ decode_ProgCtrl_0 (SIM_CPU *cpu, bu16 iw0, bu32 pc)
CYCLE_DELAY = 2;
}
else
illegal_instruction (cpu);
illegal_instruction_or_combination (cpu);
}
static void
@ -2045,13 +2054,13 @@ decode_PushPopReg_0 (SIM_CPU *cpu, bu16 iw0)
/* Can't push/pop reserved registers */
if (reg_is_reserved (grp, reg))
illegal_instruction (cpu);
illegal_instruction_or_combination (cpu);
if (W == 0)
{
/* Dreg and Preg are not supported by this instruction. */
if (grp == 0 || grp == 1)
illegal_instruction (cpu);
illegal_instruction_or_combination (cpu);
TRACE_INSN (cpu, "%s = [SP++];", reg_name);
/* Can't pop USP while in userspace. */
if (PARALLEL_GROUP != BFIN_PARALLEL_NONE
@ -2104,6 +2113,9 @@ decode_PushPopMultiple_0 (SIM_CPU *cpu, bu16 iw0)
TRACE_EXTRACT (cpu, "%s: d:%i p:%i W:%i dr:%i pr:%i",
__func__, d, p, W, dr, pr);
if (PARALLEL_GROUP != BFIN_PARALLEL_NONE)
illegal_instruction_combination (cpu);
if ((d == 0 && p == 0) || (p && imm5 (pr) > 5)
|| (d && !p && pr) || (p && !d && dr))
illegal_instruction (cpu);
@ -2215,7 +2227,7 @@ decode_CCflag_0 (SIM_CPU *cpu, bu16 iw0)
bs64 diff = acc0 - acc1;
if (x != 0 || y != 0)
illegal_instruction (cpu);
illegal_instruction_or_combination (cpu);
if (opc == 5 && I == 0 && G == 0)
{
@ -2239,7 +2251,7 @@ decode_CCflag_0 (SIM_CPU *cpu, bu16 iw0)
SET_CCREG (acc0 <= acc1);
}
else
illegal_instruction (cpu);
illegal_instruction_or_combination (cpu);
SET_ASTATREG (az, diff == 0);
SET_ASTATREG (an, diff < 0);
@ -2304,6 +2316,9 @@ decode_CCflag_0 (SIM_CPU *cpu, bu16 iw0)
TRACE_INSN (cpu, "CC = %c%i %s %c%i%s;", s, x, op, d, y, sign);
}
if (PARALLEL_GROUP != BFIN_PARALLEL_NONE)
illegal_instruction_combination (cpu);
SET_CCREG (cc);
/* Pointer compares only touch CC. */
if (!G)
@ -2350,7 +2365,7 @@ decode_CC2dreg_0 (SIM_CPU *cpu, bu16 iw0)
SET_CCREG (!CCREG);
}
else
illegal_instruction (cpu);
illegal_instruction_or_combination (cpu);
}
static void
@ -2373,13 +2388,13 @@ decode_CC2stat_0 (SIM_CPU *cpu, bu16 iw0)
TRACE_INSN (cpu, "%s %s= %s;", D ? astat_names[cbit] : "CC",
op_names[op], D ? "CC" : astat_names[cbit]);
if (PARALLEL_GROUP != BFIN_PARALLEL_NONE)
illegal_instruction_combination (cpu);
/* CC = CC; is invalid. */
if (cbit == 5)
illegal_instruction (cpu);
if (PARALLEL_GROUP != BFIN_PARALLEL_NONE)
illegal_instruction_combination (cpu);
pval = !!(ASTAT & (1 << cbit));
if (D == 0)
switch (op)
@ -2491,6 +2506,9 @@ decode_REGMV_0 (SIM_CPU *cpu, bu16 iw0)
TRACE_INSN (cpu, "%s = %s;", dstreg_name, srcreg_name);
if (PARALLEL_GROUP != BFIN_PARALLEL_NONE)
illegal_instruction_combination (cpu);
/* Reserved slots cannot be a src/dst. */
if (reg_is_reserved (gs, src) || reg_is_reserved (gd, dst))
goto invalid_move;
@ -2539,6 +2557,9 @@ decode_ALU2op_0 (SIM_CPU *cpu, bu16 iw0)
PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ALU2op);
TRACE_EXTRACT (cpu, "%s: opc:%i src:%i dst:%i", __func__, opc, src, dst);
if (PARALLEL_GROUP != BFIN_PARALLEL_NONE)
illegal_instruction_combination (cpu);
if (opc == 0)
{
TRACE_INSN (cpu, "R%i >>>= R%i;", dst, src);
@ -2647,6 +2668,9 @@ decode_PTR2op_0 (SIM_CPU *cpu, bu16 iw0)
PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_PTR2op);
TRACE_EXTRACT (cpu, "%s: opc:%i src:%i dst:%i", __func__, opc, src, dst);
if (PARALLEL_GROUP != BFIN_PARALLEL_NONE)
illegal_instruction_combination (cpu);
if (opc == 0)
{
TRACE_INSN (cpu, "%s -= %s", dst_name, src_name);
@ -2780,6 +2804,9 @@ decode_COMP3op_0 (SIM_CPU *cpu, bu16 iw0)
TRACE_EXTRACT (cpu, "%s: opc:%i dst:%i src1:%i src0:%i",
__func__, opc, dst, src1, src0);
if (PARALLEL_GROUP != BFIN_PARALLEL_NONE)
illegal_instruction_combination (cpu);
if (opc == 0)
{
TRACE_INSN (cpu, "R%i = R%i + R%i;", dst, src0, src1);
@ -2843,6 +2870,9 @@ decode_COMPI2opD_0 (SIM_CPU *cpu, bu16 iw0)
TRACE_EXTRACT (cpu, "%s: op:%i src:%i dst:%i", __func__, op, src, dst);
TRACE_DECODE (cpu, "%s: imm7:%#x", __func__, imm);
if (PARALLEL_GROUP != BFIN_PARALLEL_NONE)
illegal_instruction_combination (cpu);
if (op == 0)
{
TRACE_INSN (cpu, "R%i = %s (X);", dst, imm7_str (imm));
@ -2872,6 +2902,9 @@ decode_COMPI2opP_0 (SIM_CPU *cpu, bu16 iw0)
TRACE_EXTRACT (cpu, "%s: op:%i src:%i dst:%i", __func__, op, src, dst);
TRACE_DECODE (cpu, "%s: imm:%#x", __func__, imm);
if (PARALLEL_GROUP != BFIN_PARALLEL_NONE)
illegal_instruction_combination (cpu);
if (op == 0)
{
TRACE_INSN (cpu, "%s = %s;", dst_name, imm7_str (imm));
@ -2904,6 +2937,9 @@ decode_LDSTpmod_0 (SIM_CPU *cpu, bu16 iw0)
TRACE_EXTRACT (cpu, "%s: W:%i aop:%i reg:%i idx:%i ptr:%i",
__func__, W, aop, reg, idx, ptr);
if (PARALLEL_GROUP == BFIN_PARALLEL_GROUP2)
illegal_instruction_combination (cpu);
if (aop == 1 && W == 0 && idx == ptr)
{
TRACE_INSN (cpu, "R%i.L = W[%s];", reg, ptr_name);
@ -3000,7 +3036,7 @@ decode_LDSTpmod_0 (SIM_CPU *cpu, bu16 iw0)
STORE (PREG (ptr), addr + PREG (idx));
}
else
illegal_instruction (cpu);
illegal_instruction_or_combination (cpu);
}
static void
@ -3018,6 +3054,9 @@ decode_dagMODim_0 (SIM_CPU *cpu, bu16 iw0)
PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_dagMODim);
TRACE_EXTRACT (cpu, "%s: br:%i op:%i m:%i i:%i", __func__, br, op, m, i);
if (PARALLEL_GROUP == BFIN_PARALLEL_GROUP2)
illegal_instruction_combination (cpu);
if (op == 0 && br == 1)
{
TRACE_INSN (cpu, "I%i += M%i (BREV);", i, m);
@ -3034,7 +3073,7 @@ decode_dagMODim_0 (SIM_CPU *cpu, bu16 iw0)
dagsub (cpu, i, MREG (m));
}
else
illegal_instruction (cpu);
illegal_instruction_or_combination (cpu);
}
static void
@ -3050,6 +3089,9 @@ decode_dagMODik_0 (SIM_CPU *cpu, bu16 iw0)
PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_dagMODik);
TRACE_EXTRACT (cpu, "%s: op:%i i:%i", __func__, op, i);
if (PARALLEL_GROUP == BFIN_PARALLEL_GROUP2)
illegal_instruction_combination (cpu);
if (op == 0)
{
TRACE_INSN (cpu, "I%i += 2;", i);
@ -3071,7 +3113,7 @@ decode_dagMODik_0 (SIM_CPU *cpu, bu16 iw0)
dagsub (cpu, i, 4);
}
else
illegal_instruction (cpu);
illegal_instruction_or_combination (cpu);
}
static void
@ -3234,7 +3276,7 @@ decode_dspLDST_0 (SIM_CPU *cpu, bu16 iw0)
PUT_LONG (addr, DREG (reg));
}
else
illegal_instruction (cpu);
illegal_instruction_or_combination (cpu);
}
static void
@ -3258,8 +3300,8 @@ decode_LDST_0 (SIM_CPU *cpu, bu16 iw0)
TRACE_EXTRACT (cpu, "%s: sz:%i W:%i aop:%i Z:%i ptr:%i reg:%i",
__func__, sz, W, aop, Z, ptr, reg);
if (aop == 3)
illegal_instruction (cpu);
if (aop == 3 || PARALLEL_GROUP == BFIN_PARALLEL_GROUP2)
illegal_instruction_or_combination (cpu);
if (W == 0)
{
@ -3296,7 +3338,7 @@ decode_LDST_0 (SIM_CPU *cpu, bu16 iw0)
SET_DREG (reg, (bs32) (bs8) GET_BYTE (PREG (ptr)));
}
else
illegal_instruction (cpu);
illegal_instruction_or_combination (cpu);
}
else
{
@ -3321,7 +3363,7 @@ decode_LDST_0 (SIM_CPU *cpu, bu16 iw0)
PUT_BYTE (PREG (ptr), DREG (reg));
}
else
illegal_instruction (cpu);
illegal_instruction_or_combination (cpu);
}
if (aop == 0)
@ -3353,6 +3395,9 @@ decode_LDSTiiFP_0 (SIM_CPU *cpu, bu16 iw0)
W, offset, grp, reg);
TRACE_DECODE (cpu, "%s: negimm5s4:%#x", __func__, imm);
if (PARALLEL_GROUP == BFIN_PARALLEL_GROUP2)
illegal_instruction_or_combination (cpu);
if (W == 0)
{
TRACE_INSN (cpu, "%s = [FP + %s];", reg_name, imm_str);
@ -3393,6 +3438,9 @@ decode_LDSTii_0 (SIM_CPU *cpu, bu16 iw0)
TRACE_DECODE (cpu, "%s: uimm4s4/uimm4s2:%#x", __func__, imm);
if (PARALLEL_GROUP == BFIN_PARALLEL_GROUP2)
illegal_instruction_combination (cpu);
if (W == 1 && op == 2)
illegal_instruction (cpu);
@ -6165,7 +6213,7 @@ _interp_insn_bfin (SIM_CPU *cpu, bu32 pc)
else
{
TRACE_EXTRACT (cpu, "%s: no matching 16-bit pattern", __func__);
illegal_instruction (cpu);
illegal_instruction_or_combination (cpu);
}
return insn_len;
}