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ARM: Expose vfp_get_fpscr() and vfp_set_fpscr() to C code

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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>
This commit is contained in:
Peter Maydell 2010-11-24 15:20:04 +00:00 committed by Riku Voipio
parent 5f0b7c888b
commit 0165329578
2 changed files with 14 additions and 0 deletions
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4
target-arm/cpu.h
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@ -300,6 +300,10 @@ static inline void xpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
}
}
/* 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,

10
target-arm/helper.c
View File

@ -2251,6 +2251,11 @@ uint32_t HELPER(vfp_get_fpscr)(CPUState *env)
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 @@ void HELPER(vfp_set_fpscr)(CPUState *env, uint32_t val)
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) \