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ctr: Add support for multiple integers in DECL_CTR_INT

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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Kevin O'Connor 2019-08-22 12:12:21 -04:00
parent 1b83fb72f5
commit 84fd89b8cf
3 changed files with 24 additions and 20 deletions
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30
src/ctr.h
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@ -14,20 +14,24 @@
static char __PASTE(_DECLS_, __LINE__)[] __attribute__((used)) \
__section(".compile_time_request") = (REQUEST)
// Helper macros for encoding an integer
#define CTR_HEX(H) ((H) > 9 ? (H) - 10 + 'A' : (H) + '0')
#define CTR_INT(V, S) CTR_HEX(((uint32_t)(V) >> (S)) & 0x0f)
// Macro to encode an integer for use with DECL_CTR_INT()
#define _CTR_HEX(H) ((H) > 9 ? (H) - 10 + 'A' : (H) + '0')
#define _CTR_INT(V, S) _CTR_HEX(((uint32_t)(V) >> (S)) & 0x0f)
#define CTR_INT(VALUE) { \
' ', (VALUE) < 0 ? '-' : '+', '0', 'x', \
_CTR_INT((VALUE),28), _CTR_INT((VALUE),24), \
_CTR_INT((VALUE),20), _CTR_INT((VALUE),16), \
_CTR_INT((VALUE),12), _CTR_INT((VALUE),8), \
_CTR_INT((VALUE),4), _CTR_INT((VALUE),0) }
// Declare a compile time request with an integer expression
#define DECL_CTR_INT(REQUEST, VALUE) \
static struct { char _r[sizeof(REQUEST)]; char _v[12]; } \
__PASTE(_DECLI_, __LINE__) __attribute__((used)) \
__section(".compile_time_request") = { \
REQUEST " ", { \
(VALUE) < 0 ? '-' : '+', '0', 'x', \
CTR_INT((VALUE),28), CTR_INT((VALUE),24), \
CTR_INT((VALUE),20), CTR_INT((VALUE),16), \
CTR_INT((VALUE),12), CTR_INT((VALUE),8), \
CTR_INT((VALUE),4), CTR_INT((VALUE),0), 0 } }
#define DECL_CTR_INT(REQUEST, PARAM_COUNT, args...) \
static struct { \
char _request[sizeof(REQUEST)-1]; \
char _values[(PARAM_COUNT)][12]; \
char _end_of_line; \
} __PASTE(_DECLI_, __LINE__) __attribute__((used)) \
__section(".compile_time_request") = { \
(REQUEST), { args }, 0 }
#endif // ctr.h