}
CIA_SET (STATE_CPU (sd, 0), (unsigned64) PC);
- return SIM_RC_OK;
-}
-
-void
-sim_do_command (SIM_DESC sd, char *cmd)
-{
- char *mm_cmd = "memory-map";
- char *int_cmd = "interrupt";
+ if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_am33_2)
+ PSW |= PSW_FE;
- if (sim_args_command (sd, cmd) != SIM_RC_OK)
- {
- if (strncmp (cmd, mm_cmd, strlen (mm_cmd) == 0))
- sim_io_eprintf (sd, "`memory-map' command replaced by `sim memory'\n");
- else if (strncmp (cmd, int_cmd, strlen (int_cmd)) == 0)
- sim_io_eprintf (sd, "`interrupt' command replaced by `sim watch'\n");
- else
- sim_io_eprintf (sd, "Unknown command `%s'\n", cmd);
- }
+ return SIM_RC_OK;
}
/* FIXME These would more efficient to use than load_mem/store_mem,
int length)
{
put_word (memory, State.regs[rn]);
- return -1;
+ return length;
}
int
int length)
{
State.regs[rn] = get_word (memory);
- return -1;
+ return length;
}
}
State.exc_suspended = 0;
}
+
+/* This is called when an FP instruction is issued when the FP unit is
+ disabled, i.e., the FE bit of PSW is zero. It raises interrupt
+ code 0x1c0. */
+void
+fpu_disabled_exception (SIM_DESC sd, sim_cpu *cpu, sim_cia cia)
+{
+ sim_io_eprintf(sd, "FPU disabled exception\n");
+ program_interrupt (sd, cpu, cia, SIM_SIGFPE);
+}
+
+/* This is called when the FP unit is enabled but one of the
+ unimplemented insns is issued. It raises interrupt code 0x1c8. */
+void
+fpu_unimp_exception (SIM_DESC sd, sim_cpu *cpu, sim_cia cia)
+{
+ sim_io_eprintf(sd, "Unimplemented FPU instruction exception\n");
+ program_interrupt (sd, cpu, cia, SIM_SIGFPE);
+}
+
+/* This is called at the end of any FP insns that may have triggered
+ FP exceptions. If no exception is enabled, it returns immediately.
+ Otherwise, it raises an exception code 0x1d0. */
+void
+fpu_check_signal_exception (SIM_DESC sd, sim_cpu *cpu, sim_cia cia)
+{
+ if ((FPCR & EC_MASK) == 0)
+ return;
+
+ sim_io_eprintf(sd, "FPU %s%s%s%s%s exception\n",
+ (FPCR & EC_V) ? "V" : "",
+ (FPCR & EC_Z) ? "Z" : "",
+ (FPCR & EC_O) ? "O" : "",
+ (FPCR & EC_U) ? "U" : "",
+ (FPCR & EC_I) ? "I" : "");
+ program_interrupt (sd, cpu, cia, SIM_SIGFPE);
+}
+
+/* Convert a 32-bit single-precision FP value in the target platform
+ format to a sim_fpu value. */
+static void
+reg2val_32 (const void *reg, sim_fpu *val)
+{
+ FS2FPU (*(reg_t *)reg, *val);
+}
+
+/* Round the given sim_fpu value to single precision, following the
+ target platform rounding and denormalization conventions. On
+ AM33/2.0, round_near is the only rounding mode. */
+static int
+round_32 (sim_fpu *val)
+{
+ return sim_fpu_round_32 (val, sim_fpu_round_near, sim_fpu_denorm_zero);
+}
+
+/* Convert a sim_fpu value to the 32-bit single-precision target
+ representation. */
+static void
+val2reg_32 (const sim_fpu *val, void *reg)
+{
+ FPU2FS (*val, *(reg_t *)reg);
+}
+
+/* Define the 32-bit single-precision conversion and rounding uniform
+ interface. */
+const struct fp_prec_t
+fp_single_prec = {
+ reg2val_32, round_32, val2reg_32
+};
+
+/* Convert a 64-bit double-precision FP value in the target platform
+ format to a sim_fpu value. */
+static void
+reg2val_64 (const void *reg, sim_fpu *val)
+{
+ FD2FPU (*(dword *)reg, *val);
+}
+
+/* Round the given sim_fpu value to double precision, following the
+ target platform rounding and denormalization conventions. On
+ AM33/2.0, round_near is the only rounding mode. */
+int
+round_64 (sim_fpu *val)
+{
+ return sim_fpu_round_64 (val, sim_fpu_round_near, sim_fpu_denorm_zero);
+}
+
+/* Convert a sim_fpu value to the 64-bit double-precision target
+ representation. */
+static void
+val2reg_64 (const sim_fpu *val, void *reg)
+{
+ FPU2FD (*val, *(dword *)reg);
+}
+
+/* Define the 64-bit single-precision conversion and rounding uniform
+ interface. */
+const struct fp_prec_t
+fp_double_prec = {
+ reg2val_64, round_64, val2reg_64
+};
+
+/* Define shortcuts to the uniform interface operations. */
+#define REG2VAL(reg,val) (*ops->reg2val) (reg,val)
+#define ROUND(val) (*ops->round) (val)
+#define VAL2REG(val,reg) (*ops->val2reg) (val,reg)
+
+/* Check whether overflow, underflow or inexact exceptions should be
+ raised. */
+int
+fpu_status_ok (sim_fpu_status stat)
+{
+ if ((stat & sim_fpu_status_overflow)
+ && (FPCR & EE_O))
+ FPCR |= EC_O;
+ else if ((stat & (sim_fpu_status_underflow | sim_fpu_status_denorm))
+ && (FPCR & EE_U))
+ FPCR |= EC_U;
+ else if ((stat & (sim_fpu_status_inexact | sim_fpu_status_rounded))
+ && (FPCR & EE_I))
+ FPCR |= EC_I;
+ else if (stat & ~ (sim_fpu_status_overflow
+ | sim_fpu_status_underflow
+ | sim_fpu_status_denorm
+ | sim_fpu_status_inexact
+ | sim_fpu_status_rounded))
+ abort ();
+ else
+ return 1;
+ return 0;
+}
+
+/* Implement a 32/64 bit reciprocal square root, signaling FP
+ exceptions when appropriate. */
+void
+fpu_rsqrt (SIM_DESC sd, sim_cpu *cpu, sim_cia cia,
+ const void *reg_in, void *reg_out, const struct fp_prec_t *ops)
+{
+ sim_fpu in, med, out;
+
+ REG2VAL (reg_in, &in);
+ ROUND (&in);
+ FPCR &= ~ EC_MASK;
+ switch (sim_fpu_is (&in))
+ {
+ case SIM_FPU_IS_SNAN:
+ case SIM_FPU_IS_NNUMBER:
+ case SIM_FPU_IS_NINF:
+ if (FPCR & EE_V)
+ FPCR |= EC_V;
+ else
+ VAL2REG (&sim_fpu_qnan, reg_out);
+ break;
+
+ case SIM_FPU_IS_QNAN:
+ VAL2REG (&sim_fpu_qnan, reg_out);
+ break;
+
+ case SIM_FPU_IS_PINF:
+ VAL2REG (&sim_fpu_zero, reg_out);
+ break;
+
+ case SIM_FPU_IS_PNUMBER:
+ {
+ /* Since we don't have a function to compute rsqrt directly,
+ use sqrt and inv. */
+ sim_fpu_status stat = 0;
+ stat |= sim_fpu_sqrt (&med, &in);
+ stat |= sim_fpu_inv (&out, &med);
+ stat |= ROUND (&out);
+ if (fpu_status_ok (stat))
+ VAL2REG (&out, reg_out);
+ }
+ break;
+
+ case SIM_FPU_IS_NZERO:
+ case SIM_FPU_IS_PZERO:
+ if (FPCR & EE_Z)
+ FPCR |= EC_Z;
+ else
+ {
+ /* Generate an INF with the same sign. */
+ sim_fpu_inv (&out, &in);
+ VAL2REG (&out, reg_out);
+ }
+ break;
+
+ default:
+ abort ();
+ }
+
+ fpu_check_signal_exception (sd, cpu, cia);
+}
+
+static inline reg_t
+cmp2fcc (int res)
+{
+ switch (res)
+ {
+ case SIM_FPU_IS_SNAN:
+ case SIM_FPU_IS_QNAN:
+ return FCC_U;
+
+ case SIM_FPU_IS_NINF:
+ case SIM_FPU_IS_NNUMBER:
+ case SIM_FPU_IS_NDENORM:
+ return FCC_L;
+
+ case SIM_FPU_IS_PINF:
+ case SIM_FPU_IS_PNUMBER:
+ case SIM_FPU_IS_PDENORM:
+ return FCC_G;
+
+ case SIM_FPU_IS_NZERO:
+ case SIM_FPU_IS_PZERO:
+ return FCC_E;
+
+ default:
+ abort ();
+ }
+}
+
+/* Implement a 32/64 bit FP compare, setting the FPCR status and/or
+ exception bits as specified. */
+void
+fpu_cmp (SIM_DESC sd, sim_cpu *cpu, sim_cia cia,
+ const void *reg_in1, const void *reg_in2,
+ const struct fp_prec_t *ops)
+{
+ sim_fpu m, n;
+
+ REG2VAL (reg_in1, &m);
+ REG2VAL (reg_in2, &n);
+ FPCR &= ~ EC_MASK;
+ FPCR &= ~ FCC_MASK;
+ ROUND (&m);
+ ROUND (&n);
+ if (sim_fpu_is_snan (&m) || sim_fpu_is_snan (&n))
+ {
+ if (FPCR & EE_V)
+ FPCR |= EC_V;
+ else
+ FPCR |= FCC_U;
+ }
+ else
+ FPCR |= cmp2fcc (sim_fpu_cmp (&m, &n));
+
+ fpu_check_signal_exception (sd, cpu, cia);
+}
+
+/* Implement a 32/64 bit FP add, setting FP exception bits when
+ appropriate. */
+void
+fpu_add (SIM_DESC sd, sim_cpu *cpu, sim_cia cia,
+ const void *reg_in1, const void *reg_in2,
+ void *reg_out, const struct fp_prec_t *ops)
+{
+ sim_fpu m, n, r;
+
+ REG2VAL (reg_in1, &m);
+ REG2VAL (reg_in2, &n);
+ ROUND (&m);
+ ROUND (&n);
+ FPCR &= ~ EC_MASK;
+ if (sim_fpu_is_snan (&m) || sim_fpu_is_snan (&n)
+ || (sim_fpu_is (&m) == SIM_FPU_IS_PINF
+ && sim_fpu_is (&n) == SIM_FPU_IS_NINF)
+ || (sim_fpu_is (&m) == SIM_FPU_IS_NINF
+ && sim_fpu_is (&n) == SIM_FPU_IS_PINF))
+ {
+ if (FPCR & EE_V)
+ FPCR |= EC_V;
+ else
+ VAL2REG (&sim_fpu_qnan, reg_out);
+ }
+ else
+ {
+ sim_fpu_status stat = sim_fpu_add (&r, &m, &n);
+ stat |= ROUND (&r);
+ if (fpu_status_ok (stat))
+ VAL2REG (&r, reg_out);
+ }
+
+ fpu_check_signal_exception (sd, cpu, cia);
+}
+
+/* Implement a 32/64 bit FP sub, setting FP exception bits when
+ appropriate. */
+void
+fpu_sub (SIM_DESC sd, sim_cpu *cpu, sim_cia cia,
+ const void *reg_in1, const void *reg_in2,
+ void *reg_out, const struct fp_prec_t *ops)
+{
+ sim_fpu m, n, r;
+
+ REG2VAL (reg_in1, &m);
+ REG2VAL (reg_in2, &n);
+ ROUND (&m);
+ ROUND (&n);
+ FPCR &= ~ EC_MASK;
+ if (sim_fpu_is_snan (&m) || sim_fpu_is_snan (&n)
+ || (sim_fpu_is (&m) == SIM_FPU_IS_PINF
+ && sim_fpu_is (&n) == SIM_FPU_IS_PINF)
+ || (sim_fpu_is (&m) == SIM_FPU_IS_NINF
+ && sim_fpu_is (&n) == SIM_FPU_IS_NINF))
+ {
+ if (FPCR & EE_V)
+ FPCR |= EC_V;
+ else
+ VAL2REG (&sim_fpu_qnan, reg_out);
+ }
+ else
+ {
+ sim_fpu_status stat = sim_fpu_sub (&r, &m, &n);
+ stat |= ROUND (&r);
+ if (fpu_status_ok (stat))
+ VAL2REG (&r, reg_out);
+ }
+
+ fpu_check_signal_exception (sd, cpu, cia);
+}
+
+/* Implement a 32/64 bit FP mul, setting FP exception bits when
+ appropriate. */
+void
+fpu_mul (SIM_DESC sd, sim_cpu *cpu, sim_cia cia,
+ const void *reg_in1, const void *reg_in2,
+ void *reg_out, const struct fp_prec_t *ops)
+{
+ sim_fpu m, n, r;
+
+ REG2VAL (reg_in1, &m);
+ REG2VAL (reg_in2, &n);
+ ROUND (&m);
+ ROUND (&n);
+ FPCR &= ~ EC_MASK;
+ if (sim_fpu_is_snan (&m) || sim_fpu_is_snan (&n)
+ || (sim_fpu_is_infinity (&m) && sim_fpu_is_zero (&n))
+ || (sim_fpu_is_zero (&m) && sim_fpu_is_infinity (&n)))
+ {
+ if (FPCR & EE_V)
+ FPCR |= EC_V;
+ else
+ VAL2REG (&sim_fpu_qnan, reg_out);
+ }
+ else
+ {
+ sim_fpu_status stat = sim_fpu_mul (&r, &m, &n);
+ stat |= ROUND (&r);
+ if (fpu_status_ok (stat))
+ VAL2REG (&r, reg_out);
+ }
+
+ fpu_check_signal_exception (sd, cpu, cia);
+}
+
+/* Implement a 32/64 bit FP div, setting FP exception bits when
+ appropriate. */
+void
+fpu_div (SIM_DESC sd, sim_cpu *cpu, sim_cia cia,
+ const void *reg_in1, const void *reg_in2,
+ void *reg_out, const struct fp_prec_t *ops)
+{
+ sim_fpu m, n, r;
+
+ REG2VAL (reg_in1, &m);
+ REG2VAL (reg_in2, &n);
+ ROUND (&m);
+ ROUND (&n);
+ FPCR &= ~ EC_MASK;
+ if (sim_fpu_is_snan (&m) || sim_fpu_is_snan (&n)
+ || (sim_fpu_is_infinity (&m) && sim_fpu_is_infinity (&n))
+ || (sim_fpu_is_zero (&m) && sim_fpu_is_zero (&n)))
+ {
+ if (FPCR & EE_V)
+ FPCR |= EC_V;
+ else
+ VAL2REG (&sim_fpu_qnan, reg_out);
+ }
+ else if (sim_fpu_is_number (&m) && sim_fpu_is_zero (&n)
+ && (FPCR & EE_Z))
+ FPCR |= EC_Z;
+ else
+ {
+ sim_fpu_status stat = sim_fpu_div (&r, &m, &n);
+ stat |= ROUND (&r);
+ if (fpu_status_ok (stat))
+ VAL2REG (&r, reg_out);
+ }
+
+ fpu_check_signal_exception (sd, cpu, cia);
+}
+
+/* Implement a 32/64 bit FP madd, setting FP exception bits when
+ appropriate. */
+void
+fpu_fmadd (SIM_DESC sd, sim_cpu *cpu, sim_cia cia,
+ const void *reg_in1, const void *reg_in2, const void *reg_in3,
+ void *reg_out, const struct fp_prec_t *ops)
+{
+ sim_fpu m1, m2, m, n, r;
+
+ REG2VAL (reg_in1, &m1);
+ REG2VAL (reg_in2, &m2);
+ REG2VAL (reg_in3, &n);
+ ROUND (&m1);
+ ROUND (&m2);
+ ROUND (&n);
+ FPCR &= ~ EC_MASK;
+ if (sim_fpu_is_snan (&m1) || sim_fpu_is_snan (&m2) || sim_fpu_is_snan (&n)
+ || (sim_fpu_is_infinity (&m1) && sim_fpu_is_zero (&m2))
+ || (sim_fpu_is_zero (&m1) && sim_fpu_is_infinity (&m2)))
+ {
+ invalid_operands:
+ if (FPCR & EE_V)
+ FPCR |= EC_V;
+ else
+ VAL2REG (&sim_fpu_qnan, reg_out);
+ }
+ else
+ {
+ sim_fpu_status stat = sim_fpu_mul (&m, &m1, &m2);
+
+ if (sim_fpu_is_infinity (&m) && sim_fpu_is_infinity (&n)
+ && sim_fpu_sign (&m) != sim_fpu_sign (&n))
+ goto invalid_operands;
+
+ stat |= sim_fpu_add (&r, &m, &n);
+ stat |= ROUND (&r);
+ if (fpu_status_ok (stat))
+ VAL2REG (&r, reg_out);
+ }
+
+ fpu_check_signal_exception (sd, cpu, cia);
+}
+
+/* Implement a 32/64 bit FP msub, setting FP exception bits when
+ appropriate. */
+void
+fpu_fmsub (SIM_DESC sd, sim_cpu *cpu, sim_cia cia,
+ const void *reg_in1, const void *reg_in2, const void *reg_in3,
+ void *reg_out, const struct fp_prec_t *ops)
+{
+ sim_fpu m1, m2, m, n, r;
+
+ REG2VAL (reg_in1, &m1);
+ REG2VAL (reg_in2, &m2);
+ REG2VAL (reg_in3, &n);
+ ROUND (&m1);
+ ROUND (&m2);
+ ROUND (&n);
+ FPCR &= ~ EC_MASK;
+ if (sim_fpu_is_snan (&m1) || sim_fpu_is_snan (&m2) || sim_fpu_is_snan (&n)
+ || (sim_fpu_is_infinity (&m1) && sim_fpu_is_zero (&m2))
+ || (sim_fpu_is_zero (&m1) && sim_fpu_is_infinity (&m2)))
+ {
+ invalid_operands:
+ if (FPCR & EE_V)
+ FPCR |= EC_V;
+ else
+ VAL2REG (&sim_fpu_qnan, reg_out);
+ }
+ else
+ {
+ sim_fpu_status stat = sim_fpu_mul (&m, &m1, &m2);
+
+ if (sim_fpu_is_infinity (&m) && sim_fpu_is_infinity (&n)
+ && sim_fpu_sign (&m) == sim_fpu_sign (&n))
+ goto invalid_operands;
+
+ stat |= sim_fpu_sub (&r, &m, &n);
+ stat |= ROUND (&r);
+ if (fpu_status_ok (stat))
+ VAL2REG (&r, reg_out);
+ }
+
+ fpu_check_signal_exception (sd, cpu, cia);
+}
+
+/* Implement a 32/64 bit FP nmadd, setting FP exception bits when
+ appropriate. */
+void
+fpu_fnmadd (SIM_DESC sd, sim_cpu *cpu, sim_cia cia,
+ const void *reg_in1, const void *reg_in2, const void *reg_in3,
+ void *reg_out, const struct fp_prec_t *ops)
+{
+ sim_fpu m1, m2, m, mm, n, r;
+
+ REG2VAL (reg_in1, &m1);
+ REG2VAL (reg_in2, &m2);
+ REG2VAL (reg_in3, &n);
+ ROUND (&m1);
+ ROUND (&m2);
+ ROUND (&n);
+ FPCR &= ~ EC_MASK;
+ if (sim_fpu_is_snan (&m1) || sim_fpu_is_snan (&m2) || sim_fpu_is_snan (&n)
+ || (sim_fpu_is_infinity (&m1) && sim_fpu_is_zero (&m2))
+ || (sim_fpu_is_zero (&m1) && sim_fpu_is_infinity (&m2)))
+ {
+ invalid_operands:
+ if (FPCR & EE_V)
+ FPCR |= EC_V;
+ else
+ VAL2REG (&sim_fpu_qnan, reg_out);
+ }
+ else
+ {
+ sim_fpu_status stat = sim_fpu_mul (&m, &m1, &m2);
+
+ if (sim_fpu_is_infinity (&m) && sim_fpu_is_infinity (&n)
+ && sim_fpu_sign (&m) == sim_fpu_sign (&n))
+ goto invalid_operands;
+
+ stat |= sim_fpu_neg (&mm, &m);
+ stat |= sim_fpu_add (&r, &mm, &n);
+ stat |= ROUND (&r);
+ if (fpu_status_ok (stat))
+ VAL2REG (&r, reg_out);
+ }
+
+ fpu_check_signal_exception (sd, cpu, cia);
+}
+
+/* Implement a 32/64 bit FP nmsub, setting FP exception bits when
+ appropriate. */
+void
+fpu_fnmsub (SIM_DESC sd, sim_cpu *cpu, sim_cia cia,
+ const void *reg_in1, const void *reg_in2, const void *reg_in3,
+ void *reg_out, const struct fp_prec_t *ops)
+{
+ sim_fpu m1, m2, m, mm, n, r;
+
+ REG2VAL (reg_in1, &m1);
+ REG2VAL (reg_in2, &m2);
+ REG2VAL (reg_in3, &n);
+ ROUND (&m1);
+ ROUND (&m2);
+ ROUND (&n);
+ FPCR &= ~ EC_MASK;
+ if (sim_fpu_is_snan (&m1) || sim_fpu_is_snan (&m2) || sim_fpu_is_snan (&n)
+ || (sim_fpu_is_infinity (&m1) && sim_fpu_is_zero (&m2))
+ || (sim_fpu_is_zero (&m1) && sim_fpu_is_infinity (&m2)))
+ {
+ invalid_operands:
+ if (FPCR & EE_V)
+ FPCR |= EC_V;
+ else
+ VAL2REG (&sim_fpu_qnan, reg_out);
+ }
+ else
+ {
+ sim_fpu_status stat = sim_fpu_mul (&m, &m1, &m2);
+
+ if (sim_fpu_is_infinity (&m) && sim_fpu_is_infinity (&n)
+ && sim_fpu_sign (&m) != sim_fpu_sign (&n))
+ goto invalid_operands;
+
+ stat |= sim_fpu_neg (&mm, &m);
+ stat |= sim_fpu_sub (&r, &mm, &n);
+ stat |= ROUND (&r);
+ if (fpu_status_ok (stat))
+ VAL2REG (&r, reg_out);
+ }
+
+ fpu_check_signal_exception (sd, cpu, cia);
+}
projects / external / binutils.git / blobdiff