ARM: Expose vfp_get_fpscr() and vfp_set_fpscr() to C code
Expose the vfp_get_fpscr() and vfp_set_fpscr() functions to C
code as well as generated code, so we can use them to read and
write the FPSCR when saving and restoring VFP registers across
signal handlers in linux-user mode.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index 0284bad..340933e 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -300,6 +300,10 @@
}
}
+/* Return the current FPSCR value. */
+uint32_t vfp_get_fpscr(CPUARMState *env);
+void vfp_set_fpscr(CPUARMState *env, uint32_t val);
+
enum arm_cpu_mode {
ARM_CPU_MODE_USR = 0x10,
ARM_CPU_MODE_FIQ = 0x11,
diff --git a/target-arm/helper.c b/target-arm/helper.c
index 94aef39..2a1f448 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -2251,6 +2251,11 @@
return fpscr;
}
+uint32_t vfp_get_fpscr(CPUState *env)
+{
+ return HELPER(vfp_get_fpscr)(env);
+}
+
/* Convert vfp exception flags to target form. */
static inline int vfp_exceptbits_to_host(int target_bits)
{
@@ -2307,6 +2312,11 @@
set_float_exception_flags(i, &env->vfp.fp_status);
}
+void vfp_set_fpscr(CPUState *env, uint32_t val)
+{
+ HELPER(vfp_set_fpscr)(env, val);
+}
+
#define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p))
#define VFP_BINOP(name) \
