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authorAndrew Mahone <andrew.mahone@gmail.com>2009-06-06 00:00:58 +0000
committerAndrew Mahone <andrew.mahone@gmail.com>2009-06-06 00:00:58 +0000
commitde7c5711c5d67e7e69386d6e35e42c8ce15de69b (patch)
tree22f58338387ae6ac662e43fe83ef60105f97d627 /firmware/target/sh
parentfe72c890a76c1f227ef749adbdcf964bb166d74c (diff)
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Add a system-wide BIT_N macro, implemented via an LUT on SH, and use it in the TAGCACHE_IS_* macros in place of per-set LUTs, removing duplication of data between those LUTs and the mask values used on other targets.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21195 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/sh')
-rw-r--r--firmware/target/sh/system-sh.c11
-rw-r--r--firmware/target/sh/system-target.h7
2 files changed, 18 insertions, 0 deletions
diff --git a/firmware/target/sh/system-sh.c b/firmware/target/sh/system-sh.c
index 02af40282f..7779c975a7 100644
--- a/firmware/target/sh/system-sh.c
+++ b/firmware/target/sh/system-sh.c
@@ -27,6 +27,17 @@
#include "font.h"
#include "led.h"
+const unsigned bit_n_table[32] = {
+ 1LU<< 0, 1LU<< 1, 1LU<< 2, 1LU<< 3,
+ 1LU<< 4, 1LU<< 5, 1LU<< 6, 1LU<< 7,
+ 1LU<< 8, 1LU<< 9, 1LU<<10, 1LU<<11,
+ 1LU<<12, 1LU<<13, 1LU<<14, 1LU<<15,
+ 1LU<<16, 1LU<<17, 1LU<<18, 1LU<<19,
+ 1LU<<20, 1LU<<21, 1LU<<22, 1LU<<23,
+ 1LU<<24, 1LU<<25, 1LU<<26, 1LU<<27,
+ 1LU<<28, 1LU<<29, 1LU<<30, 1LU<<31
+};
+
static const char* const irqname[] = {
"", "", "", "", "IllInstr", "", "IllSltIn","","",
"CPUAdrEr", "DMAAdrEr", "NMI", "UserBrk",
diff --git a/firmware/target/sh/system-target.h b/firmware/target/sh/system-target.h
index 3c225fbb69..2568911a1e 100644
--- a/firmware/target/sh/system-target.h
+++ b/firmware/target/sh/system-target.h
@@ -126,4 +126,11 @@ static inline uint32_t swap_odd_even32(uint32_t value)
return value;
}
+extern const unsigned bit_n_table[32];
+#define BIT_N(n) ( \
+ __builtin_constant_p(n) \
+ ? (1LU << (n)) \
+ : bit_n_table[n] \
+)
+
#endif /* SYSTEM_TARGET_H */