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| author | Steven Le Rouzic <steven.lerouzic@gmail.com> | 2024-05-13 00:04:44 +0200 |
|---|---|---|
| committer | Steven Le Rouzic <steven.lerouzic@gmail.com> | 2024-05-13 00:04:44 +0200 |
| commit | f95a85de0082010e4af83e26e99299d601bb48d6 (patch) | |
| tree | 0b70ff8fa990ceeb18c2522ea80f2599d50ebae4 /emulator/bits.h | |
| parent | f9541157b62ec44deff0b906757c223ca0220102 (diff) | |
Some work on CSR
Diffstat (limited to 'emulator/bits.h')
| -rw-r--r-- | emulator/bits.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/emulator/bits.h b/emulator/bits.h new file mode 100644 index 0000000..8d4bdff --- /dev/null +++ b/emulator/bits.h @@ -0,0 +1,15 @@ +#pragma once
+
+#include <stdint.h>
+
+static inline uint32_t sign_extend(uint32_t word, uint32_t size)
+{
+ const uint32_t mask = 1U << (size - 1);
+ return (word ^ mask) - mask;
+}
+
+static inline uint64_t sign_extend_64(uint64_t word, uint32_t size)
+{
+ const uint64_t mask = 1ULL << (size - 1);
+ return (word ^ mask) - mask;
+}
|