x86: SYSENTER/SYSEXIT are unavailable in 64-bit mode on AMD

[deliverable/binutils-gdb.git] / sim / aarch64 / cpustate.c

diff --git a/sim/aarch64/cpustate.c b/sim/aarch64/cpustate.c
index 0656af546cdbcae7d2fc3534f44210833c616941..ce503c62de4a0e2d8511ac281bc11421c6cf4434 100644 (file)
--- a/sim/aarch64/cpustate.c
+++ b/sim/aarch64/cpustate.c
@@ -1,6 +1,6 @@
 /* cpustate.h -- Prototypes for AArch64 simulator functions.
 
-   Copyright (C) 2015-2016 Free Software Foundation, Inc.
+   Copyright (C) 2015-2020 Free Software Foundation, Inc.
 
    Contributed by Red Hat.
 
@@ -20,10 +20,12 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include <stdio.h>
+#include <math.h>
 
 #include "sim-main.h"
 #include "cpustate.h"
 #include "simulator.h"
+#include "libiberty.h"
 
 /* Some operands are allowed to access the stack pointer (reg 31).
    For others a read from r31 always returns 0, and a write to r31 is ignored.  */
@@ -87,6 +89,46 @@ aarch64_get_reg_s32 (sim_cpu *cpu, GReg reg, int r31_is_sp)
   return cpu->gr[reg_num(reg)].s32;
 }
 
+void
+aarch64_set_reg_s32 (sim_cpu *cpu, GReg reg, int r31_is_sp, int32_t val)
+{
+  if (reg == R31 && ! r31_is_sp)
+    {
+      TRACE_REGISTER (cpu, "GR[31] NOT CHANGED!");
+      return;
+    }
+
+  if (val != cpu->gr[reg].s32)
+    TRACE_REGISTER (cpu, "GR[%2d] changes from %8x to %8x",
+                   reg, cpu->gr[reg].s32, val);
+
+  /* The ARM ARM states that (C1.2.4):
+        When the data size is 32 bits, the lower 32 bits of the
+       register are used and the upper 32 bits are ignored on
+       a read and cleared to zero on a write.
+     We simulate this by first clearing the whole 64-bits and
+     then writing to the 32-bit value in the GRegister union.  */
+  cpu->gr[reg].s64 = 0;
+  cpu->gr[reg].s32 = val;
+}
+
+void
+aarch64_set_reg_u32 (sim_cpu *cpu, GReg reg, int r31_is_sp, uint32_t val)
+{
+  if (reg == R31 && ! r31_is_sp)
+    {
+      TRACE_REGISTER (cpu, "GR[31] NOT CHANGED!");
+      return;
+    }
+
+  if (val != cpu->gr[reg].u32)
+    TRACE_REGISTER (cpu, "GR[%2d] changes from %8x to %8x",
+                   reg, cpu->gr[reg].u32, val);
+
+  cpu->gr[reg].u64 = 0;
+  cpu->gr[reg].u32 = val;
+}
+
 uint32_t
 aarch64_get_reg_u16 (sim_cpu *cpu, GReg reg, int r31_is_sp)
 {
@@ -286,8 +328,8 @@ aarch64_get_FP_half (sim_cpu *cpu, VReg reg)
     float    f;
   } u;
 
-  u.h[0] = cpu->fr[reg].h[0];
-  u.h[1] = 0;
+  u.h[0] = 0;
+  u.h[1] = cpu->fr[reg].h[0];
   return u.f;
 }
 
@@ -321,7 +363,7 @@ aarch64_set_FP_half (sim_cpu *cpu, VReg reg, float val)
   } u;
 
   u.f = val;
-  cpu->fr[reg].h[0] = u.h[0];
+  cpu->fr[reg].h[0] = u.h[1];
   cpu->fr[reg].h[1] = 0;
 }
 
@@ -329,7 +371,9 @@ aarch64_set_FP_half (sim_cpu *cpu, VReg reg, float val)
 void
 aarch64_set_FP_float (sim_cpu *cpu, VReg reg, float val)
 {
-  if (val != cpu->fr[reg].s)
+  if (val != cpu->fr[reg].s
+      /* Handle +/- zero.  */
+      || signbit (val) != signbit (cpu->fr[reg].s))
     {
       FRegister v;
 
@@ -345,7 +389,9 @@ aarch64_set_FP_float (sim_cpu *cpu, VReg reg, float val)
 void
 aarch64_set_FP_double (sim_cpu *cpu, VReg reg, double val)
 {
-  if (val != cpu->fr[reg].d)
+  if (val != cpu->fr[reg].d
+      /* Handle +/- zero.  */
+      || signbit (val) != signbit (cpu->fr[reg].d))
     {
       FRegister v;
 
@@ -448,12 +494,12 @@ aarch64_get_vec_double (sim_cpu *cpu, VReg reg, unsigned element)
 }
 
 
-#define SET_VEC_ELEMENT(REG, ELEMENT, VAL, FIELD, PRINTER)     \
-  do                                                           \
-    {                                                          \
+#define SET_VEC_ELEMENT(REG, ELEMENT, VAL, FIELD, PRINTER)             \
+  do                                                                   \
+    {                                                                  \
       if (ELEMENT >= ARRAY_SIZE (cpu->fr[0].FIELD))                    \
        {                                                               \
-         TRACE_REGISTER (cpu, \
+         TRACE_REGISTER (cpu,                                          \
                          "Internal SIM error: invalid element number: %d ",\
                          ELEMENT);                                     \
          sim_engine_halt (CPU_STATE (cpu), cpu, NULL, aarch64_get_PC (cpu), \
@@ -464,31 +510,31 @@ aarch64_get_vec_double (sim_cpu *cpu, VReg reg, unsigned element)
                        "VR[%2d]." #FIELD " [%d] changes from " PRINTER \
                        " to " PRINTER , REG,                           \
                        ELEMENT, cpu->fr[REG].FIELD [ELEMENT], VAL);    \
-      \
-      cpu->fr[REG].FIELD [ELEMENT] = VAL;     \
-    }                                        \
+                                                                       \
+      cpu->fr[REG].FIELD [ELEMENT] = VAL;                              \
+    }                                                                  \
   while (0)
 
 void
-aarch64_set_vec_u64 (sim_cpu * cpu, VReg reg, unsigned element, uint64_t val)
+aarch64_set_vec_u64 (sim_cpu *cpu, VReg reg, unsigned element, uint64_t val)
 {
   SET_VEC_ELEMENT (reg, element, val, v, "%16lx");
 }
 
 void
-aarch64_set_vec_u32 (sim_cpu * cpu, VReg reg, unsigned element, uint32_t val)
+aarch64_set_vec_u32 (sim_cpu *cpu, VReg reg, unsigned element, uint32_t val)
 {
   SET_VEC_ELEMENT (reg, element, val, w, "%8x");
 }
 
 void
-aarch64_set_vec_u16 (sim_cpu * cpu, VReg reg, unsigned element, uint16_t val)
+aarch64_set_vec_u16 (sim_cpu *cpu, VReg reg, unsigned element, uint16_t val)
 {
   SET_VEC_ELEMENT (reg, element, val, h, "%4x");
 }
 
 void
-aarch64_set_vec_u8 (sim_cpu * cpu, VReg reg, unsigned element, uint8_t val)
+aarch64_set_vec_u8 (sim_cpu *cpu, VReg reg, unsigned element, uint8_t val)
 {
   SET_VEC_ELEMENT (reg, element, val, b, "%x");
 }
@@ -573,19 +619,19 @@ aarch64_test_FPSR_bit (sim_cpu *cpu, FPSRMask flag)
 }
 
 uint64_t
-aarch64_get_thread_id (sim_cpu * cpu)
+aarch64_get_thread_id (sim_cpu *cpu)
 {
   return cpu->tpidr;
 }
 
 uint32_t
-aarch64_get_FPCR (sim_cpu * cpu)
+aarch64_get_FPCR (sim_cpu *cpu)
 {
   return cpu->FPCR;
 }
 
 void
-aarch64_set_FPCR (sim_cpu * cpu, uint32_t val)
+aarch64_set_FPCR (sim_cpu *cpu, uint32_t val)
 {
   if (cpu->FPCR != val)
     TRACE_REGISTER (cpu,