&& fixp->fx_offset == fixp->fx_next->fx_offset);
}
+/* See whether instruction IP reads register REG. CLASS is the type
+ of register. */
+
+static int
+insn_uses_reg (const struct mips_cl_insn *ip, unsigned int reg,
+ enum mips_regclass regclass)
+{
+ if (regclass == MIPS16_REG)
+ {
+ gas_assert (mips_opts.mips16);
+ reg = mips16_to_32_reg_map[reg];
+ regclass = MIPS_GR_REG;
+ }
+
+ /* Don't report on general register ZERO, since it never changes. */
+ if (regclass == MIPS_GR_REG && reg == ZERO)
+ return 0;
+
+ if (regclass == MIPS_FP_REG)
+ {
+ gas_assert (! mips_opts.mips16);
+ /* If we are called with either $f0 or $f1, we must check $f0.
+ This is not optimal, because it will introduce an unnecessary
+ NOP between "lwc1 $f0" and "swc1 $f1". To fix this we would
+ need to distinguish reading both $f0 and $f1 or just one of
+ them. Note that we don't have to check the other way,
+ because there is no instruction that sets both $f0 and $f1
+ and requires a delay. */
+ if ((ip->insn_mo->pinfo & INSN_READ_FPR_S)
+ && ((EXTRACT_OPERAND (FS, *ip) & ~(unsigned) 1)
+ == (reg &~ (unsigned) 1)))
+ return 1;
+ if ((ip->insn_mo->pinfo & INSN_READ_FPR_T)
+ && ((EXTRACT_OPERAND (FT, *ip) & ~(unsigned) 1)
+ == (reg &~ (unsigned) 1)))
+ return 1;
+ if ((ip->insn_mo->pinfo2 & INSN2_READ_FPR_Z)
+ && ((EXTRACT_OPERAND (FZ, *ip) & ~(unsigned) 1)
+ == (reg &~ (unsigned) 1)))
+ return 1;
+ }
+ else if (! mips_opts.mips16)
+ {
+ if ((ip->insn_mo->pinfo & INSN_READ_GPR_S)
+ && EXTRACT_OPERAND (RS, *ip) == reg)
+ return 1;
+ if ((ip->insn_mo->pinfo & INSN_READ_GPR_T)
+ && EXTRACT_OPERAND (RT, *ip) == reg)
+ return 1;
+ if ((ip->insn_mo->pinfo2 & INSN2_READ_GPR_D)
+ && EXTRACT_OPERAND (RD, *ip) == reg)
+ return 1;
+ if ((ip->insn_mo->pinfo2 & INSN2_READ_GPR_Z)
+ && EXTRACT_OPERAND (RZ, *ip) == reg)
+ return 1;
+ }
+ else
+ {
+ if ((ip->insn_mo->pinfo & MIPS16_INSN_READ_X)
+ && mips16_to_32_reg_map[MIPS16_EXTRACT_OPERAND (RX, *ip)] == reg)
+ return 1;
+ if ((ip->insn_mo->pinfo & MIPS16_INSN_READ_Y)
+ && mips16_to_32_reg_map[MIPS16_EXTRACT_OPERAND (RY, *ip)] == reg)
+ return 1;
+ if ((ip->insn_mo->pinfo & MIPS16_INSN_READ_Z)
+ && (mips16_to_32_reg_map[MIPS16_EXTRACT_OPERAND (MOVE32Z, *ip)]
+ == reg))
+ return 1;
+ if ((ip->insn_mo->pinfo & MIPS16_INSN_READ_T) && reg == TREG)
+ return 1;
+ if ((ip->insn_mo->pinfo & MIPS16_INSN_READ_SP) && reg == SP)
+ return 1;
+ if ((ip->insn_mo->pinfo & MIPS16_INSN_READ_31) && reg == RA)
+ return 1;
+ if ((ip->insn_mo->pinfo & MIPS16_INSN_READ_GPR_X)
+ && MIPS16_EXTRACT_OPERAND (REGR32, *ip) == reg)
+ return 1;
+ }
+
+ return 0;
+}
+
/* This function returns true if modifying a register requires a
delay. */
mips_relax.sequence = 0;
}
-/* Return the mask of core registers that IP reads. */
-
-static unsigned int
-gpr_read_mask (const struct mips_cl_insn *ip)
-{
- unsigned long pinfo, pinfo2;
- unsigned int mask;
-
- mask = 0;
- pinfo = ip->insn_mo->pinfo;
- pinfo2 = ip->insn_mo->pinfo2;
- if (mips_opts.mips16)
- {
- if (pinfo & MIPS16_INSN_READ_X)
- mask |= 1 << mips16_to_32_reg_map[MIPS16_EXTRACT_OPERAND (RX, *ip)];
- if (pinfo & MIPS16_INSN_READ_Y)
- mask |= 1 << mips16_to_32_reg_map[MIPS16_EXTRACT_OPERAND (RY, *ip)];
- if (pinfo & MIPS16_INSN_READ_T)
- mask |= 1 << TREG;
- if (pinfo & MIPS16_INSN_READ_SP)
- mask |= 1 << SP;
- if (pinfo & MIPS16_INSN_READ_31)
- mask |= 1 << RA;
- if (pinfo & MIPS16_INSN_READ_Z)
- mask |= 1 << (mips16_to_32_reg_map
- [MIPS16_EXTRACT_OPERAND (MOVE32Z, *ip)]);
- if (pinfo & MIPS16_INSN_READ_GPR_X)
- mask |= 1 << MIPS16_EXTRACT_OPERAND (REGR32, *ip);
- }
- else
- {
- if (pinfo2 & INSN2_READ_GPR_D)
- mask |= 1 << EXTRACT_OPERAND (RD, *ip);
- if (pinfo & INSN_READ_GPR_T)
- mask |= 1 << EXTRACT_OPERAND (RT, *ip);
- if (pinfo & INSN_READ_GPR_S)
- mask |= 1 << EXTRACT_OPERAND (RS, *ip);
- if (pinfo2 & INSN2_READ_GPR_Z)
- mask |= 1 << EXTRACT_OPERAND (RZ, *ip);
- }
- return mask & ~0;
-}
-
-/* Return the mask of core registers that IP writes. */
-
-static unsigned int
-gpr_write_mask (const struct mips_cl_insn *ip)
-{
- unsigned long pinfo, pinfo2;
- unsigned int mask;
-
- mask = 0;
- pinfo = ip->insn_mo->pinfo;
- pinfo2 = ip->insn_mo->pinfo2;
- if (mips_opts.mips16)
- {
- if (pinfo & MIPS16_INSN_WRITE_X)
- mask |= 1 << mips16_to_32_reg_map[MIPS16_EXTRACT_OPERAND (RX, *ip)];
- if (pinfo & MIPS16_INSN_WRITE_Y)
- mask |= 1 << mips16_to_32_reg_map[MIPS16_EXTRACT_OPERAND (RY, *ip)];
- if (pinfo & MIPS16_INSN_WRITE_Z)
- mask |= 1 << mips16_to_32_reg_map[MIPS16_EXTRACT_OPERAND (RZ, *ip)];
- if (pinfo & MIPS16_INSN_WRITE_T)
- mask |= 1 << TREG;
- if (pinfo & MIPS16_INSN_WRITE_SP)
- mask |= 1 << SP;
- if (pinfo & MIPS16_INSN_WRITE_31)
- mask |= 1 << RA;
- if (pinfo & MIPS16_INSN_WRITE_GPR_Y)
- mask |= 1 << MIPS16OP_EXTRACT_REG32R (ip->insn_opcode);
- }
- else
- {
- if (pinfo & INSN_WRITE_GPR_D)
- mask |= 1 << EXTRACT_OPERAND (RD, *ip);
- if (pinfo & INSN_WRITE_GPR_T)
- mask |= 1 << EXTRACT_OPERAND (RT, *ip);
- if (pinfo & INSN_WRITE_GPR_31)
- mask |= 1 << RA;
- if (pinfo2 & INSN2_WRITE_GPR_Z)
- mask |= 1 << EXTRACT_OPERAND (RZ, *ip);
- }
- return mask & ~0;
-}
-
-/* Return the mask of floating-point registers that IP reads. */
-
-static unsigned int
-fpr_read_mask (const struct mips_cl_insn *ip)
-{
- unsigned long pinfo, pinfo2;
- unsigned int mask;
-
- mask = 0;
- pinfo = ip->insn_mo->pinfo;
- pinfo2 = ip->insn_mo->pinfo2;
- if (!mips_opts.mips16)
- {
- if (pinfo & INSN_READ_FPR_S)
- mask |= 1 << EXTRACT_OPERAND (FS, *ip);
- if (pinfo & INSN_READ_FPR_T)
- mask |= 1 << EXTRACT_OPERAND (FT, *ip);
- if (pinfo & INSN_READ_FPR_R)
- mask |= 1 << EXTRACT_OPERAND (FR, *ip);
- if (pinfo2 & INSN2_READ_FPR_Z)
- mask |= 1 << EXTRACT_OPERAND (FZ, *ip);
- }
- return mask;
-}
-
-/* Return the mask of floating-point registers that IP writes. */
-
-static unsigned int
-fpr_write_mask (const struct mips_cl_insn *ip)
-{
- unsigned long pinfo, pinfo2;
- unsigned int mask;
-
- mask = 0;
- pinfo = ip->insn_mo->pinfo;
- pinfo2 = ip->insn_mo->pinfo2;
- if (!mips_opts.mips16)
- {
- if (pinfo & INSN_WRITE_FPR_D)
- mask |= 1 << EXTRACT_OPERAND (FD, *ip);
- if (pinfo & INSN_WRITE_FPR_S)
- mask |= 1 << EXTRACT_OPERAND (FS, *ip);
- if (pinfo & INSN_WRITE_FPR_T)
- mask |= 1 << EXTRACT_OPERAND (FT, *ip);
- if (pinfo2 & INSN2_WRITE_FPR_Z)
- mask |= 1 << EXTRACT_OPERAND (FZ, *ip);
- }
- return mask;
-}
-
/* Classify an instruction according to the FIX_VR4120_* enumeration.
Return NUM_FIX_VR4120_CLASSES if the instruction isn't affected
by VR4120 errata. */
const struct mips_cl_insn *insn2)
{
unsigned long pinfo1, pinfo2;
- unsigned int mask;
/* This function needs to know which pinfo flags are set for INSN2
and which registers INSN2 uses. The former is stored in PINFO2 and
- the latter is tested via INSN2_USES_GPR. If INSN2 is null, PINFO2
- will have every flag set and INSN2_USES_GPR will always return true. */
+ the latter is tested via INSN2_USES_REG. If INSN2 is null, PINFO2
+ will have every flag set and INSN2_USES_REG will always return true. */
pinfo1 = insn1->insn_mo->pinfo;
pinfo2 = insn2 ? insn2->insn_mo->pinfo : ~0U;
-#define INSN2_USES_GPR(REG) \
- (insn2 == NULL || (gpr_read_mask (insn2) & (1U << (REG))) != 0)
+#define INSN2_USES_REG(REG, CLASS) \
+ (insn2 == NULL || insn_uses_reg (insn2, REG, CLASS))
/* For most targets, write-after-read dependencies on the HI and LO
registers must be separated by at least two instructions. */
between an mfhi or mflo and any instruction that uses the result. */
if (mips_7000_hilo_fix
&& MF_HILO_INSN (pinfo1)
- && INSN2_USES_GPR (EXTRACT_OPERAND (RD, *insn1)))
+ && INSN2_USES_REG (EXTRACT_OPERAND (RD, *insn1), MIPS_GR_REG))
return 2;
/* If we're working around 24K errata, one instruction is required
|| (!cop_interlocks && (pinfo1 & INSN_LOAD_COPROC_DELAY)))
{
know (pinfo1 & INSN_WRITE_GPR_T);
- if (INSN2_USES_GPR (EXTRACT_OPERAND (RT, *insn1)))
+ if (INSN2_USES_REG (EXTRACT_OPERAND (RT, *insn1), MIPS_GR_REG))
return 1;
}
/* Handle cases where INSN1 writes to a known general coprocessor
register. There must be a one instruction delay before INSN2
if INSN2 reads that register, otherwise no delay is needed. */
- mask = fpr_write_mask (insn1);
- if (mask != 0)
+ if (pinfo1 & INSN_WRITE_FPR_T)
+ {
+ if (INSN2_USES_REG (EXTRACT_OPERAND (FT, *insn1), MIPS_FP_REG))
+ return 1;
+ }
+ else if (pinfo1 & INSN_WRITE_FPR_S)
{
- if (!insn2 || (mask & fpr_read_mask (insn2)) != 0)
+ if (INSN2_USES_REG (EXTRACT_OPERAND (FS, *insn1), MIPS_FP_REG))
return 1;
}
else
return 1;
}
-#undef INSN2_USES_GPR
+#undef INSN2_USES_REG
return 0;
}
nops_for_vr4130 (int ignore, const struct mips_cl_insn *hist,
const struct mips_cl_insn *insn)
{
- int i, j;
- unsigned int mask;
+ int i, j, reg;
/* Check if the instruction writes to HI or LO. MTHI and MTLO
are not affected by the errata. */
if (MF_HILO_INSN (hist[i].insn_mo->pinfo))
{
/* Extract the destination register. */
- mask = gpr_write_mask (&hist[i]);
+ if (mips_opts.mips16)
+ reg = mips16_to_32_reg_map[MIPS16_EXTRACT_OPERAND (RX, hist[i])];
+ else
+ reg = EXTRACT_OPERAND (RD, hist[i]);
/* No nops are needed if INSN reads that register. */
- if (insn != NULL && (gpr_read_mask (insn) & mask) != 0)
+ if (insn != NULL && insn_uses_reg (insn, reg, MIPS_GR_REG))
return 0;
/* ...or if any of the intervening instructions do. */
for (j = 0; j < i; j++)
- if (gpr_read_mask (&hist[j]) & mask)
+ if (insn_uses_reg (&hist[j], reg, MIPS_GR_REG))
return 0;
if (i >= ignore)
install_insn (ip);
/* Update the register mask information. */
- mips_gprmask |= gpr_read_mask (ip) | gpr_write_mask (ip);
- mips_cprmask[1] |= fpr_read_mask (ip) | fpr_write_mask (ip);
+ if (! mips_opts.mips16)
+ {
+ if ((pinfo & INSN_WRITE_GPR_D) || (pinfo2 & INSN2_READ_GPR_D))
+ mips_gprmask |= 1 << EXTRACT_OPERAND (RD, *ip);
+ if ((pinfo & (INSN_WRITE_GPR_T | INSN_READ_GPR_T)) != 0)
+ mips_gprmask |= 1 << EXTRACT_OPERAND (RT, *ip);
+ if (pinfo & INSN_READ_GPR_S)
+ mips_gprmask |= 1 << EXTRACT_OPERAND (RS, *ip);
+ if (pinfo & INSN_WRITE_GPR_31)
+ mips_gprmask |= 1 << RA;
+ if (pinfo2 & (INSN2_WRITE_GPR_Z | INSN2_READ_GPR_Z))
+ mips_gprmask |= 1 << EXTRACT_OPERAND (RZ, *ip);
+ if (pinfo & INSN_WRITE_FPR_D)
+ mips_cprmask[1] |= 1 << EXTRACT_OPERAND (FD, *ip);
+ if ((pinfo & (INSN_WRITE_FPR_S | INSN_READ_FPR_S)) != 0)
+ mips_cprmask[1] |= 1 << EXTRACT_OPERAND (FS, *ip);
+ if ((pinfo & (INSN_WRITE_FPR_T | INSN_READ_FPR_T)) != 0)
+ mips_cprmask[1] |= 1 << EXTRACT_OPERAND (FT, *ip);
+ if ((pinfo & INSN_READ_FPR_R) != 0)
+ mips_cprmask[1] |= 1 << EXTRACT_OPERAND (FR, *ip);
+ if (pinfo2 & (INSN2_WRITE_FPR_Z | INSN2_READ_FPR_Z))
+ mips_cprmask[1] |= 1 << EXTRACT_OPERAND (FZ, *ip);
+ if (pinfo & INSN_COP)
+ {
+ /* We don't keep enough information to sort these cases out.
+ The itbl support does keep this information however, although
+ we currently don't support itbl fprmats as part of the cop
+ instruction. May want to add this support in the future. */
+ }
+ /* Never set the bit for $0, which is always zero. */
+ mips_gprmask &= ~1 << 0;
+ }
+ else
+ {
+ if (pinfo & (MIPS16_INSN_WRITE_X | MIPS16_INSN_READ_X))
+ mips_gprmask |= 1 << MIPS16_EXTRACT_OPERAND (RX, *ip);
+ if (pinfo & (MIPS16_INSN_WRITE_Y | MIPS16_INSN_READ_Y))
+ mips_gprmask |= 1 << MIPS16_EXTRACT_OPERAND (RY, *ip);
+ if (pinfo & MIPS16_INSN_WRITE_Z)
+ mips_gprmask |= 1 << MIPS16_EXTRACT_OPERAND (RZ, *ip);
+ if (pinfo & (MIPS16_INSN_WRITE_T | MIPS16_INSN_READ_T))
+ mips_gprmask |= 1 << TREG;
+ if (pinfo & (MIPS16_INSN_WRITE_SP | MIPS16_INSN_READ_SP))
+ mips_gprmask |= 1 << SP;
+ if (pinfo & (MIPS16_INSN_WRITE_31 | MIPS16_INSN_READ_31))
+ mips_gprmask |= 1 << RA;
+ if (pinfo & MIPS16_INSN_WRITE_GPR_Y)
+ mips_gprmask |= 1 << MIPS16OP_EXTRACT_REG32R (ip->insn_opcode);
+ if (pinfo & MIPS16_INSN_READ_Z)
+ mips_gprmask |= 1 << MIPS16_EXTRACT_OPERAND (MOVE32Z, *ip);
+ if (pinfo & MIPS16_INSN_READ_GPR_X)
+ mips_gprmask |= 1 << MIPS16_EXTRACT_OPERAND (REGR32, *ip);
+ }
if (mips_relax.sequence != 2 && !mips_opts.noreorder)
{
|| (prev_pinfo & INSN_TRAP)
/* If the branch reads a register that the previous
instruction sets, we can not swap. */
- || (gpr_read_mask (ip) & gpr_write_mask (&history[0])) != 0
+ || (! mips_opts.mips16
+ && (prev_pinfo & INSN_WRITE_GPR_T)
+ && insn_uses_reg (ip, EXTRACT_OPERAND (RT, history[0]),
+ MIPS_GR_REG))
+ || (! mips_opts.mips16
+ && (prev_pinfo & INSN_WRITE_GPR_D)
+ && insn_uses_reg (ip, EXTRACT_OPERAND (RD, history[0]),
+ MIPS_GR_REG))
+ || (! mips_opts.mips16
+ && (prev_pinfo2 & INSN2_WRITE_GPR_Z)
+ && insn_uses_reg (ip, EXTRACT_OPERAND (RZ, history[0]),
+ MIPS_GR_REG))
+ || (mips_opts.mips16
+ && (((prev_pinfo & MIPS16_INSN_WRITE_X)
+ && (insn_uses_reg
+ (ip, MIPS16_EXTRACT_OPERAND (RX, history[0]),
+ MIPS16_REG)))
+ || ((prev_pinfo & MIPS16_INSN_WRITE_Y)
+ && (insn_uses_reg
+ (ip, MIPS16_EXTRACT_OPERAND (RY, history[0]),
+ MIPS16_REG)))
+ || ((prev_pinfo & MIPS16_INSN_WRITE_Z)
+ && (insn_uses_reg
+ (ip, MIPS16_EXTRACT_OPERAND (RZ, history[0]),
+ MIPS16_REG)))
+ || ((prev_pinfo & MIPS16_INSN_WRITE_T)
+ && insn_uses_reg (ip, TREG, MIPS_GR_REG))
+ || ((prev_pinfo & MIPS16_INSN_WRITE_31)
+ && insn_uses_reg (ip, RA, MIPS_GR_REG))
+ || ((prev_pinfo & MIPS16_INSN_WRITE_GPR_Y)
+ && insn_uses_reg (ip,
+ MIPS16OP_EXTRACT_REG32R
+ (history[0].insn_opcode),
+ MIPS_GR_REG))))
/* If the branch writes a register that the previous
- instruction sets, we can not swap. */
- || (gpr_write_mask (ip) & gpr_write_mask (&history[0])) != 0
+ instruction sets, we can not swap (we know that
+ branches write only to RD or to $31). */
+ || (! mips_opts.mips16
+ && (prev_pinfo & INSN_WRITE_GPR_T)
+ && (((pinfo & INSN_WRITE_GPR_D)
+ && (EXTRACT_OPERAND (RT, history[0])
+ == EXTRACT_OPERAND (RD, *ip)))
+ || ((pinfo & INSN_WRITE_GPR_31)
+ && EXTRACT_OPERAND (RT, history[0]) == RA)))
+ || (! mips_opts.mips16
+ && (prev_pinfo & INSN_WRITE_GPR_D)
+ && (((pinfo & INSN_WRITE_GPR_D)
+ && (EXTRACT_OPERAND (RD, history[0])
+ == EXTRACT_OPERAND (RD, *ip)))
+ || ((pinfo & INSN_WRITE_GPR_31)
+ && EXTRACT_OPERAND (RD, history[0]) == RA)))
+ || (mips_opts.mips16
+ && (pinfo & MIPS16_INSN_WRITE_31)
+ && ((prev_pinfo & MIPS16_INSN_WRITE_31)
+ || ((prev_pinfo & MIPS16_INSN_WRITE_GPR_Y)
+ && (MIPS16OP_EXTRACT_REG32R (history[0].insn_opcode)
+ == RA))))
/* If the branch writes a register that the previous
- instruction reads, we can not swap. */
- || (gpr_write_mask (ip) & gpr_read_mask (&history[0])) != 0
+ instruction reads, we can not swap (we know that
+ branches only write to RD or to $31). */
+ || (! mips_opts.mips16
+ && (pinfo & INSN_WRITE_GPR_D)
+ && insn_uses_reg (&history[0],
+ EXTRACT_OPERAND (RD, *ip),
+ MIPS_GR_REG))
+ || (! mips_opts.mips16
+ && (pinfo & INSN_WRITE_GPR_31)
+ && insn_uses_reg (&history[0], RA, MIPS_GR_REG))
+ || (mips_opts.mips16
+ && (pinfo & MIPS16_INSN_WRITE_31)
+ && insn_uses_reg (&history[0], RA, MIPS_GR_REG))
/* If one instruction sets a condition code and the
other one uses a condition code, we can not swap. */
|| ((pinfo & INSN_READ_COND_CODE)
projects / binutils-gdb.git / commitdiff