From patchwork Fri Dec 3 13:36:36 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [09/16] ARM: Expose vfp_get_fpscr() and vfp_set_fpscr() to C code Date: Fri, 03 Dec 2010 03:36:36 -0000 From: Riku@afflict.kos.to, Voipio@afflict.kos.to X-Patchwork-Id: 74153 Message-Id: <0165329578eb8f40901825177c0874efb815e342.1291382447.git.riku.voipio@nokia.com> To: qemu-devel@nongnu.org Cc: Peter Maydell From: Peter Maydell 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 Signed-off-by: Riku Voipio --- target-arm/cpu.h | 4 ++++ target-arm/helper.c | 10 ++++++++++ 2 files changed, 14 insertions(+), 0 deletions(-) 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 @@ 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, 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 @@ 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) \