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-rw-r--r--cmsis_gcc.h91
1 files changed, 87 insertions, 4 deletions
diff --git a/cmsis_gcc.h b/cmsis_gcc.h
index 2d9db15..3ddcc58 100644
--- a/cmsis_gcc.h
+++ b/cmsis_gcc.h
@@ -1,11 +1,11 @@
/**************************************************************************//**
* @file cmsis_gcc.h
* @brief CMSIS compiler GCC header file
- * @version V5.0.4
- * @date 09. April 2018
+ * @version V5.2.0
+ * @date 08. May 2019
******************************************************************************/
/*
- * Copyright (c) 2009-2018 Arm Limited. All rights reserved.
+ * Copyright (c) 2009-2019 Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
@@ -113,7 +113,74 @@
#ifndef __RESTRICT
#define __RESTRICT __restrict
#endif
+#ifndef __COMPILER_BARRIER
+ #define __COMPILER_BARRIER() __ASM volatile("":::"memory")
+#endif
+
+/* ######################### Startup and Lowlevel Init ######################## */
+
+#ifndef __PROGRAM_START
+
+/**
+ \brief Initializes data and bss sections
+ \details This default implementations initialized all data and additional bss
+ sections relying on .copy.table and .zero.table specified properly
+ in the used linker script.
+
+ */
+__STATIC_FORCEINLINE __NO_RETURN void __cmsis_start(void)
+{
+ extern void _start(void) __NO_RETURN;
+
+ typedef struct {
+ uint32_t const* src;
+ uint32_t* dest;
+ uint32_t wlen;
+ } __copy_table_t;
+
+ typedef struct {
+ uint32_t* dest;
+ uint32_t wlen;
+ } __zero_table_t;
+
+ extern const __copy_table_t __copy_table_start__;
+ extern const __copy_table_t __copy_table_end__;
+ extern const __zero_table_t __zero_table_start__;
+ extern const __zero_table_t __zero_table_end__;
+
+ for (__copy_table_t const* pTable = &__copy_table_start__; pTable < &__copy_table_end__; ++pTable) {
+ for(uint32_t i=0u; i<pTable->wlen; ++i) {
+ pTable->dest[i] = pTable->src[i];
+ }
+ }
+
+ for (__zero_table_t const* pTable = &__zero_table_start__; pTable < &__zero_table_end__; ++pTable) {
+ for(uint32_t i=0u; i<pTable->wlen; ++i) {
+ pTable->dest[i] = 0u;
+ }
+ }
+
+ _start();
+}
+
+#define __PROGRAM_START __cmsis_start
+#endif
+
+#ifndef __INITIAL_SP
+#define __INITIAL_SP __StackTop
+#endif
+
+#ifndef __STACK_LIMIT
+#define __STACK_LIMIT __StackLimit
+#endif
+
+#ifndef __VECTOR_TABLE
+#define __VECTOR_TABLE __Vectors
+#endif
+#ifndef __VECTOR_TABLE_ATTRIBUTE
+#define __VECTOR_TABLE_ATTRIBUTE __attribute((used, section(".vectors")))
+#endif
/* ########################### Core Function Access ########################### */
/** \ingroup CMSIS_Core_FunctionInterface
@@ -1008,7 +1075,23 @@ __STATIC_FORCEINLINE uint32_t __RBIT(uint32_t value)
\param [in] value Value to count the leading zeros
\return number of leading zeros in value
*/
-#define __CLZ (uint8_t)__builtin_clz
+__STATIC_FORCEINLINE uint8_t __CLZ(uint32_t value)
+{
+ /* Even though __builtin_clz produces a CLZ instruction on ARM, formally
+ __builtin_clz(0) is undefined behaviour, so handle this case specially.
+ This guarantees ARM-compatible results if happening to compile on a non-ARM
+ target, and ensures the compiler doesn't decide to activate any
+ optimisations using the logic "value was passed to __builtin_clz, so it
+ is non-zero".
+ ARM GCC 7.3 and possibly earlier will optimise this test away, leaving a
+ single CLZ instruction.
+ */
+ if (value == 0U)
+ {
+ return 32U;
+ }
+ return __builtin_clz(value);
+}
#if ((defined (__ARM_ARCH_7M__ ) && (__ARM_ARCH_7M__ == 1)) || \