From f95a85de0082010e4af83e26e99299d601bb48d6 Mon Sep 17 00:00:00 2001 From: Steven Le Rouzic Date: Mon, 13 May 2024 00:04:44 +0200 Subject: Some work on CSR --- emulator/bits.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 emulator/bits.h (limited to 'emulator/bits.h') 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 + +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; +} -- cgit