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Consolidating M4-specific saturation flag code.

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This commit is contained in:
Jared Boone 2016-01-04 12:00:52 -08:00
parent b42d3cc9d5
commit a27489eb21
3 changed files with 18 additions and 12 deletions
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15
firmware/common/lpc43xx_cpp.hpp
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@ -30,6 +30,21 @@
namespace lpc43xx {
#if defined(LPC43XX_M4)
namespace m4 {
static inline bool flag_saturation() {
return __get_APSR() & (1U << 27);
}
static inline void clear_flag_saturation() {
uint32_t flags = 1;
__asm volatile ("MSR APSR_nzcvqg, %0" : : "r" (flags));
}
} /* namespace m4 */
#endif
namespace creg {
static_assert(offsetof(LPC_CREG_Type, CREG0) == 0x004, "CREG0 offset wrong");