[Qemu-devel] [PATCH 08/60] AArch64: Add support to print VFP registers in CPU

[Alexander Graf]

When dumping the current CPU state, we can also get a request
to dump the FPU state along with the CPU's integer state.

Add support to dump the VFP state when that flag is set, so that
we can properly debug code that modifies floating point registers.

Signed-off-by: Alexander Graf <address@hidden>
---
 target-arm/translate-a64.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c
index f120088..73ccade 100644
--- a/target-arm/translate-a64.c
+++ b/target-arm/translate-a64.c
@@ -85,6 +85,21 @@ void aarch64_cpu_dump_state(CPUState *cs, FILE *f,
         env->pstate & PSTATE_C ? 'c' : '.',
         env->pstate & PSTATE_V ? 'v' : '.');
     cpu_fprintf(f, "\n");
+
+    if (flags & CPU_DUMP_FPU) {
+        int numvfpregs = 32;
+        for (i = 0; i < numvfpregs; i++) {
+            uint64_t v = float64_val(env->vfp.regs[i * 2]);
+            uint64_t v1 = float64_val(env->vfp.regs[(i * 2) + 1]);
+            if (!v && !v1) {
+                /* skip empty registers - makes traces easier to read */
+                continue;
+            }
+            cpu_fprintf(f, "d%02d.0=%016" PRIx64 " " "d%02d.0=%016" PRIx64 
"\n",
+                        i, v, i, v1);
+        }
+        cpu_fprintf(f, "FPSCR: %08x\n", (int)env->vfp.xregs[ARM_VFP_FPSCR]);
+    }
 }
 
 void gen_a64_set_pc_im(uint64_t val)
-- 
1.7.12.4