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Diffstat (limited to 'lib/builtins/int_lib.h')
-rw-r--r--lib/builtins/int_lib.h61
1 files changed, 60 insertions, 1 deletions
diff --git a/lib/builtins/int_lib.h b/lib/builtins/int_lib.h
index bca5d81d4414..e66cda3fffb4 100644
--- a/lib/builtins/int_lib.h
+++ b/lib/builtins/int_lib.h
@@ -20,6 +20,13 @@
/* Assumption: Right shift of signed negative is arithmetic shift. */
/* Assumption: Endianness is little or big (not mixed). */
+#if defined(__ELF__)
+#define FNALIAS(alias_name, original_name) \
+ void alias_name() __attribute__((alias(#original_name)))
+#else
+#define FNALIAS(alias, name) _Pragma("GCC error(\"alias unsupported on this file format\")")
+#endif
+
/* ABI macro definitions */
#if __ARM_EABI__
@@ -28,13 +35,25 @@
# define COMPILER_RT_ABI __attribute__((pcs("aapcs")))
#else
# define ARM_EABI_FNALIAS(aeabi_name, name)
-# if defined(__arm__) && defined(_WIN32)
+# if defined(__arm__) && defined(_WIN32) && (!defined(_MSC_VER) || defined(__clang__))
# define COMPILER_RT_ABI __attribute__((pcs("aapcs")))
# else
# define COMPILER_RT_ABI
# endif
#endif
+#ifdef _MSC_VER
+#define ALWAYS_INLINE __forceinline
+#define NOINLINE __declspec(noinline)
+#define NORETURN __declspec(noreturn)
+#define UNUSED
+#else
+#define ALWAYS_INLINE __attribute__((always_inline))
+#define NOINLINE __attribute__((noinline))
+#define NORETURN __attribute__((noreturn))
+#define UNUSED __attribute__((unused))
+#endif
+
#if defined(__NetBSD__) && (defined(_KERNEL) || defined(_STANDALONE))
/*
* Kernel and boot environment can't use normal headers,
@@ -71,4 +90,44 @@ COMPILER_RT_ABI si_int __clzti2(ti_int a);
COMPILER_RT_ABI tu_int __udivmodti4(tu_int a, tu_int b, tu_int* rem);
#endif
+/* Definitions for builtins unavailable on MSVC */
+#if defined(_MSC_VER) && !defined(__clang__)
+#include <intrin.h>
+
+uint32_t __inline __builtin_ctz(uint32_t value) {
+ uint32_t trailing_zero = 0;
+ if (_BitScanForward(&trailing_zero, value))
+ return trailing_zero;
+ return 32;
+}
+
+uint32_t __inline __builtin_clz(uint32_t value) {
+ uint32_t leading_zero = 0;
+ if (_BitScanReverse(&leading_zero, value))
+ return 31 - leading_zero;
+ return 32;
+}
+
+#if defined(_M_ARM) || defined(_M_X64)
+uint32_t __inline __builtin_clzll(uint64_t value) {
+ uint32_t leading_zero = 0;
+ if (_BitScanReverse64(&leading_zero, value))
+ return 63 - leading_zero;
+ return 64;
+}
+#else
+uint32_t __inline __builtin_clzll(uint64_t value) {
+ if (value == 0)
+ return 64;
+ uint32_t msh = (uint32_t)(value >> 32);
+ uint32_t lsh = (uint32_t)(value & 0xFFFFFFFF);
+ if (msh != 0)
+ return __builtin_clz(msh);
+ return 32 + __builtin_clz(lsh);
+}
+#endif
+
+#define __builtin_clzl __builtin_clzll
+#endif /* defined(_MSC_VER) && !defined(__clang__) */
+
#endif /* INT_LIB_H */