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| author | Peter Maydell <peter.maydell@linaro.org> | 2011-01-14 20:39:18 +0100 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2011-01-14 20:39:18 +0100 |
| commit | a170576856fedfcdd7d8602cb5650a33d13d38f5 (patch) | |
| tree | 9dfa5bdc9fc3d968d55e27789160cbdcbddd6145 | |
| parent | 39ea3d4eaf1ff300ee55946108394729bc053dfa (diff) | |
| download | qemu-a170576856fedfcdd7d8602cb5650a33d13d38f5.zip qemu-a170576856fedfcdd7d8602cb5650a33d13d38f5.tar.gz qemu-a170576856fedfcdd7d8602cb5650a33d13d38f5.tar.bz2 | |
target-arm: Add symbolic constants for bitfields in TB flags
Add symbolic constants for the bitfields we use in the TB flags.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
| -rw-r--r-- | target-arm/cpu.h | 45 |
1 files changed, 39 insertions, 6 deletions
diff --git a/target-arm/cpu.h b/target-arm/cpu.h index e501cf5..07b92d6 100644 --- a/target-arm/cpu.h +++ b/target-arm/cpu.h @@ -453,17 +453,50 @@ static inline void cpu_clone_regs(CPUState *env, target_ulong newsp) #include "cpu-all.h" +/* Bit usage in the TB flags field: */ +#define ARM_TBFLAG_THUMB_SHIFT 0 +#define ARM_TBFLAG_THUMB_MASK (1 << ARM_TBFLAG_THUMB_SHIFT) +#define ARM_TBFLAG_VECLEN_SHIFT 1 +#define ARM_TBFLAG_VECLEN_MASK (0x7 << ARM_TBFLAG_VECLEN_SHIFT) +#define ARM_TBFLAG_VECSTRIDE_SHIFT 4 +#define ARM_TBFLAG_VECSTRIDE_MASK (0x3 << ARM_TBFLAG_VECSTRIDE_SHIFT) +#define ARM_TBFLAG_PRIV_SHIFT 6 +#define ARM_TBFLAG_PRIV_MASK (1 << ARM_TBFLAG_PRIV_SHIFT) +#define ARM_TBFLAG_VFPEN_SHIFT 7 +#define ARM_TBFLAG_VFPEN_MASK (1 << ARM_TBFLAG_VFPEN_SHIFT) +#define ARM_TBFLAG_CONDEXEC_SHIFT 8 +#define ARM_TBFLAG_CONDEXEC_MASK (0xff << ARM_TBFLAG_CONDEXEC_SHIFT) +/* Bits 31..16 are currently unused. */ + +/* some convenience accessor macros */ +#define ARM_TBFLAG_THUMB(F) \ + (((F) & ARM_TBFLAG_THUMB_MASK) >> ARM_TBFLAG_THUMB_SHIFT) +#define ARM_TBFLAG_VECLEN(F) \ + (((F) & ARM_TBFLAG_VECLEN_MASK) >> ARM_TBFLAG_VECLEN_SHIFT) +#define ARM_TBFLAG_VECSTRIDE(F) \ + (((F) & ARM_TBFLAG_VECSTRIDE_MASK) >> ARM_TBFLAG_VECSTRIDE_SHIFT) +#define ARM_TBFLAG_PRIV(F) \ + (((F) & ARM_TBFLAG_PRIV_MASK) >> ARM_TBFLAG_PRIV_SHIFT) +#define ARM_TBFLAG_VFPEN(F) \ + (((F) & ARM_TBFLAG_VFPEN_MASK) >> ARM_TBFLAG_VFPEN_SHIFT) +#define ARM_TBFLAG_CONDEXEC(F) \ + (((F) & ARM_TBFLAG_CONDEXEC_MASK) >> ARM_TBFLAG_CONDEXEC_SHIFT) + static inline void cpu_get_tb_cpu_state(CPUState *env, target_ulong *pc, target_ulong *cs_base, int *flags) { *pc = env->regs[15]; *cs_base = 0; - *flags = env->thumb | (env->vfp.vec_len << 1) - | (env->vfp.vec_stride << 4) | (env->condexec_bits << 8); - if ((env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) - *flags |= (1 << 6); - if (env->vfp.xregs[ARM_VFP_FPEXC] & (1 << 30)) - *flags |= (1 << 7); + *flags = (env->thumb << ARM_TBFLAG_THUMB_SHIFT) + | (env->vfp.vec_len << ARM_TBFLAG_VECLEN_SHIFT) + | (env->vfp.vec_stride << ARM_TBFLAG_VECSTRIDE_SHIFT) + | (env->condexec_bits << ARM_TBFLAG_CONDEXEC_SHIFT); + if ((env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) { + *flags |= ARM_TBFLAG_PRIV_MASK; + } + if (env->vfp.xregs[ARM_VFP_FPEXC] & (1 << 30)) { + *flags |= ARM_TBFLAG_VFPEN_MASK; + } } #endif |