Diff: TARGET_VK_RZ_A1H/TOOLCHAIN_IAR/cmsis_gcc.h

Revision:

171:3a7713b1edbc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TARGET_VK_RZ_A1H/TOOLCHAIN_IAR/cmsis_gcc.h	Thu Nov 08 11:45:42 2018 +0000
@@ -0,0 +1,679 @@
+/**************************************************************************//**
+ * @file     cmsis_gcc.h
+ * @brief    CMSIS compiler specific macros, functions, instructions
+ * @version  V1.0.2
+ * @date     09. April 2018
+ ******************************************************************************/
+/*
+ * Copyright (c) 2009-2018 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __CMSIS_GCC_H
+#define __CMSIS_GCC_H
+
+/* ignore some GCC warnings */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wsign-conversion"
+#pragma GCC diagnostic ignored "-Wconversion"
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+
+/* Fallback for __has_builtin */
+#ifndef __has_builtin
+  #define __has_builtin(x) (0)
+#endif
+
+/* CMSIS compiler specific defines */
+#ifndef   __ASM
+  #define __ASM                                  asm
+#endif
+#ifndef   __INLINE
+  #define __INLINE                               inline
+#endif
+#ifndef   __FORCEINLINE
+  #define __FORCEINLINE                          __attribute__((always_inline))
+#endif
+#ifndef   __STATIC_INLINE
+  #define __STATIC_INLINE                        static inline
+#endif
+#ifndef   __STATIC_FORCEINLINE
+  #define __STATIC_FORCEINLINE                   __attribute__((always_inline)) static inline
+#endif
+#ifndef   __NO_RETURN
+  #define __NO_RETURN                            __attribute__((__noreturn__))
+#endif
+#ifndef   CMSIS_DEPRECATED
+ #define  CMSIS_DEPRECATED                       __attribute__((deprecated))
+#endif
+#ifndef   __USED
+  #define __USED                                 __attribute__((used))
+#endif
+#ifndef   __WEAK
+  #define __WEAK                                 __attribute__((weak))
+#endif
+#ifndef   __PACKED
+  #define __PACKED                               __attribute__((packed, aligned(1)))
+#endif
+#ifndef   __PACKED_STRUCT
+  #define __PACKED_STRUCT                        struct __attribute__((packed, aligned(1)))
+#endif
+#ifndef   __UNALIGNED_UINT16_WRITE
+  #pragma GCC diagnostic push
+  #pragma GCC diagnostic ignored "-Wpacked"
+/*lint -esym(9058, T_UINT16_WRITE)*/ /* disable MISRA 2012 Rule 2.4 for T_UINT16_WRITE */
+  __PACKED_STRUCT T_UINT16_WRITE { uint16_t v; };
+  #pragma GCC diagnostic pop
+  #define __UNALIGNED_UINT16_WRITE(addr, val)    (void)((((struct T_UINT16_WRITE *)(void *)(addr))->v) = (val))
+#endif
+#ifndef   __UNALIGNED_UINT16_READ
+  #pragma GCC diagnostic push
+  #pragma GCC diagnostic ignored "-Wpacked"
+/*lint -esym(9058, T_UINT16_READ)*/ /* disable MISRA 2012 Rule 2.4 for T_UINT16_READ */
+  __PACKED_STRUCT T_UINT16_READ { uint16_t v; };
+  #pragma GCC diagnostic pop
+  #define __UNALIGNED_UINT16_READ(addr)          (((const struct T_UINT16_READ *)(const void *)(addr))->v)
+#endif
+#ifndef   __UNALIGNED_UINT32_WRITE
+  #pragma GCC diagnostic push
+  #pragma GCC diagnostic ignored "-Wpacked"
+/*lint -esym(9058, T_UINT32_WRITE)*/ /* disable MISRA 2012 Rule 2.4 for T_UINT32_WRITE */
+  __PACKED_STRUCT T_UINT32_WRITE { uint32_t v; };
+  #pragma GCC diagnostic pop
+  #define __UNALIGNED_UINT32_WRITE(addr, val)    (void)((((struct T_UINT32_WRITE *)(void *)(addr))->v) = (val))
+#endif
+#ifndef   __UNALIGNED_UINT32_READ
+  #pragma GCC diagnostic push
+  #pragma GCC diagnostic ignored "-Wpacked"
+  __PACKED_STRUCT T_UINT32_READ { uint32_t v; };
+  #pragma GCC diagnostic pop
+  #define __UNALIGNED_UINT32_READ(addr)          (((const struct T_UINT32_READ *)(const void *)(addr))->v)
+#endif
+#ifndef   __ALIGNED
+  #define __ALIGNED(x)                           __attribute__((aligned(x)))
+#endif
+
+/* ##########################  Core Instruction Access  ######################### */
+/**
+  \brief   No Operation
+ */
+#define __NOP()                             __ASM volatile ("nop")
+
+/**
+  \brief   Wait For Interrupt
+ */
+#define __WFI()                             __ASM volatile ("wfi")
+
+/**
+  \brief   Wait For Event
+ */
+#define __WFE()                             __ASM volatile ("wfe")
+
+/**
+  \brief   Send Event
+ */
+#define __SEV()                             __ASM volatile ("sev")
+
+/**
+  \brief   Instruction Synchronization Barrier
+  \details Instruction Synchronization Barrier flushes the pipeline in the processor,
+           so that all instructions following the ISB are fetched from cache or memory,
+           after the instruction has been completed.
+ */
+__STATIC_FORCEINLINE  void __ISB(void)
+{
+  __ASM volatile ("isb 0xF":::"memory");
+}
+
+
+/**
+  \brief   Data Synchronization Barrier
+  \details Acts as a special kind of Data Memory Barrier.
+           It completes when all explicit memory accesses before this instruction complete.
+ */
+__STATIC_FORCEINLINE  void __DSB(void)
+{
+  __ASM volatile ("dsb 0xF":::"memory");
+}
+
+/**
+  \brief   Data Memory Barrier
+  \details Ensures the apparent order of the explicit memory operations before
+           and after the instruction, without ensuring their completion.
+ */
+__STATIC_FORCEINLINE  void __DMB(void)
+{
+  __ASM volatile ("dmb 0xF":::"memory");
+}
+
+/**
+  \brief   Reverse byte order (32 bit)
+  \details Reverses the byte order in unsigned integer value. For example, 0x12345678 becomes 0x78563412.
+  \param [in]    value  Value to reverse
+  \return               Reversed value
+ */
+__STATIC_FORCEINLINE  uint32_t __REV(uint32_t value)
+{
+#if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
+  return __builtin_bswap32(value);
+#else
+  uint32_t result;
+
+  __ASM volatile ("rev %0, %1" : __CMSIS_GCC_OUT_REG (result) : __CMSIS_GCC_USE_REG (value) );
+  return result;
+#endif
+}
+
+/**
+  \brief   Reverse byte order (16 bit)
+  \details Reverses the byte order within each halfword of a word. For example, 0x12345678 becomes 0x34127856.
+  \param [in]    value  Value to reverse
+  \return               Reversed value
+ */
+#ifndef __NO_EMBEDDED_ASM
+__attribute__((section(".rev16_text"))) __STATIC_INLINE uint32_t __REV16(uint32_t value)
+{
+  uint32_t result;
+  __ASM volatile("rev16 %0, %1" : "=r" (result) : "r" (value));
+  return result;
+}
+#endif
+
+/**
+  \brief   Reverse byte order (16 bit)
+  \details Reverses the byte order in a 16-bit value and returns the signed 16-bit result. For example, 0x0080 becomes 0x8000.
+  \param [in]    value  Value to reverse
+  \return               Reversed value
+ */
+__STATIC_FORCEINLINE  int16_t __REVSH(int16_t value)
+{
+#if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
+  return (int16_t)__builtin_bswap16(value);
+#else
+  int16_t result;
+
+  __ASM volatile ("revsh %0, %1" : __CMSIS_GCC_OUT_REG (result) : __CMSIS_GCC_USE_REG (value) );
+  return result;
+#endif
+}
+
+/**
+  \brief   Rotate Right in unsigned value (32 bit)
+  \details Rotate Right (immediate) provides the value of the contents of a register rotated by a variable number of bits.
+  \param [in]    op1  Value to rotate
+  \param [in]    op2  Number of Bits to rotate
+  \return               Rotated value
+ */
+__STATIC_FORCEINLINE  uint32_t __ROR(uint32_t op1, uint32_t op2)
+{
+  op2 %= 32U;
+  if (op2 == 0U) {
+    return op1;
+  }
+  return (op1 >> op2) | (op1 << (32U - op2));
+}
+
+
+/**
+  \brief   Breakpoint
+  \param [in]    value  is ignored by the processor.
+                 If required, a debugger can use it to store additional information about the breakpoint.
+ */
+#define __BKPT(value)                       __ASM volatile ("bkpt "#value)
+
+/**
+  \brief   Reverse bit order of value
+  \details Reverses the bit order of the given value.
+  \param [in]    value  Value to reverse
+  \return               Reversed value
+ */
+__STATIC_FORCEINLINE  uint32_t __RBIT(uint32_t value)
+{
+  uint32_t result;
+
+#if ((defined (__ARM_ARCH_7M__      ) && (__ARM_ARCH_7M__      == 1)) || \
+     (defined (__ARM_ARCH_7EM__     ) && (__ARM_ARCH_7EM__     == 1)) || \
+     (defined (__ARM_ARCH_8M_MAIN__ ) && (__ARM_ARCH_8M_MAIN__ == 1))    )
+   __ASM volatile ("rbit %0, %1" : "=r" (result) : "r" (value) );
+#else
+  int32_t s = (4U /*sizeof(v)*/ * 8U) - 1U; /* extra shift needed at end */
+
+  result = value;                      /* r will be reversed bits of v; first get LSB of v */
+  for (value >>= 1U; value; value >>= 1U)
+  {
+    result <<= 1U;
+    result |= value & 1U;
+    s--;
+  }
+  result <<= s;                        /* shift when v's highest bits are zero */
+#endif
+  return result;
+}
+
+/**
+  \brief   Count leading zeros
+  \param [in]  value  Value to count the leading zeros
+  \return             number of leading zeros in value
+ */
+#define __CLZ                             (uint8_t)__builtin_clz
+
+/**
+  \brief   LDR Exclusive (8 bit)
+  \details Executes a exclusive LDR instruction for 8 bit value.
+  \param [in]    ptr  Pointer to data
+  \return             value of type uint8_t at (*ptr)
+ */
+__STATIC_FORCEINLINE  uint8_t __LDREXB(volatile uint8_t *addr)
+{
+    uint32_t result;
+
+#if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
+   __ASM volatile ("ldrexb %0, %1" : "=r" (result) : "Q" (*addr) );
+#else
+    /* Prior to GCC 4.8, "Q" will be expanded to [rx, #0] which is not
+       accepted by assembler. So has to use following less efficient pattern.
+    */
+   __ASM volatile ("ldrexb %0, [%1]" : "=r" (result) : "r" (addr) : "memory" );
+#endif
+   return ((uint8_t) result);    /* Add explicit type cast here */
+}
+
+
+/**
+  \brief   LDR Exclusive (16 bit)
+  \details Executes a exclusive LDR instruction for 16 bit values.
+  \param [in]    ptr  Pointer to data
+  \return        value of type uint16_t at (*ptr)
+ */
+__STATIC_FORCEINLINE  uint16_t __LDREXH(volatile uint16_t *addr)
+{
+    uint32_t result;
+
+#if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
+   __ASM volatile ("ldrexh %0, %1" : "=r" (result) : "Q" (*addr) );
+#else
+    /* Prior to GCC 4.8, "Q" will be expanded to [rx, #0] which is not
+       accepted by assembler. So has to use following less efficient pattern.
+    */
+   __ASM volatile ("ldrexh %0, [%1]" : "=r" (result) : "r" (addr) : "memory" );
+#endif
+   return ((uint16_t) result);    /* Add explicit type cast here */
+}
+
+
+/**
+  \brief   LDR Exclusive (32 bit)
+  \details Executes a exclusive LDR instruction for 32 bit values.
+  \param [in]    ptr  Pointer to data
+  \return        value of type uint32_t at (*ptr)
+ */
+__STATIC_FORCEINLINE  uint32_t __LDREXW(volatile uint32_t *addr)
+{
+    uint32_t result;
+
+   __ASM volatile ("ldrex %0, %1" : "=r" (result) : "Q" (*addr) );
+   return(result);
+}
+
+
+/**
+  \brief   STR Exclusive (8 bit)
+  \details Executes a exclusive STR instruction for 8 bit values.
+  \param [in]  value  Value to store
+  \param [in]    ptr  Pointer to location
+  \return          0  Function succeeded
+  \return          1  Function failed
+ */
+__STATIC_FORCEINLINE  uint32_t __STREXB(uint8_t value, volatile uint8_t *addr)
+{
+   uint32_t result;
+
+   __ASM volatile ("strexb %0, %2, %1" : "=&r" (result), "=Q" (*addr) : "r" ((uint32_t)value) );
+   return(result);
+}
+
+
+/**
+  \brief   STR Exclusive (16 bit)
+  \details Executes a exclusive STR instruction for 16 bit values.
+  \param [in]  value  Value to store
+  \param [in]    ptr  Pointer to location
+  \return          0  Function succeeded
+  \return          1  Function failed
+ */
+__STATIC_FORCEINLINE  uint32_t __STREXH(uint16_t value, volatile uint16_t *addr)
+{
+   uint32_t result;
+
+   __ASM volatile ("strexh %0, %2, %1" : "=&r" (result), "=Q" (*addr) : "r" ((uint32_t)value) );
+   return(result);
+}
+
+
+/**
+  \brief   STR Exclusive (32 bit)
+  \details Executes a exclusive STR instruction for 32 bit values.
+  \param [in]  value  Value to store
+  \param [in]    ptr  Pointer to location
+  \return          0  Function succeeded
+  \return          1  Function failed
+ */
+__STATIC_FORCEINLINE  uint32_t __STREXW(uint32_t value, volatile uint32_t *addr)
+{
+   uint32_t result;
+
+   __ASM volatile ("strex %0, %2, %1" : "=&r" (result), "=Q" (*addr) : "r" (value) );
+   return(result);
+}
+
+
+/**
+  \brief   Remove the exclusive lock
+  \details Removes the exclusive lock which is created by LDREX.
+ */
+__STATIC_FORCEINLINE  void __CLREX(void)
+{
+  __ASM volatile ("clrex" ::: "memory");
+}
+
+/**
+  \brief   Signed Saturate
+  \details Saturates a signed value.
+  \param [in]  value  Value to be saturated
+  \param [in]    sat  Bit position to saturate to (1..32)
+  \return             Saturated value
+ */
+#define __SSAT(ARG1,ARG2) \
+__extension__ \
+({                          \
+  int32_t __RES, __ARG1 = (ARG1); \
+  __ASM ("ssat %0, %1, %2" : "=r" (__RES) :  "I" (ARG2), "r" (__ARG1) ); \
+  __RES; \
+ })
+
+
+/**
+  \brief   Unsigned Saturate
+  \details Saturates an unsigned value.
+  \param [in]  value  Value to be saturated
+  \param [in]    sat  Bit position to saturate to (0..31)
+  \return             Saturated value
+ */
+#define __USAT(ARG1,ARG2) \
+__extension__ \
+({                          \
+  uint32_t __RES, __ARG1 = (ARG1); \
+  __ASM ("usat %0, %1, %2" : "=r" (__RES) :  "I" (ARG2), "r" (__ARG1) ); \
+  __RES; \
+ })
+
+/* ###########################  Core Function Access  ########################### */
+
+/**
+  \brief   Enable IRQ Interrupts
+  \details Enables IRQ interrupts by clearing the I-bit in the CPSR.
+           Can only be executed in Privileged modes.
+ */
+__STATIC_FORCEINLINE void __enable_irq(void)
+{
+  __ASM volatile ("cpsie i" : : : "memory");
+}
+
+/**
+  \brief   Disable IRQ Interrupts
+  \details Disables IRQ interrupts by setting the I-bit in the CPSR.
+  Can only be executed in Privileged modes.
+ */
+__STATIC_FORCEINLINE  void __disable_irq(void)
+{
+  __ASM volatile ("cpsid i" : : : "memory");
+}
+
+/**
+  \brief   Get FPSCR
+  \details Returns the current value of the Floating Point Status/Control register.
+  \return Floating Point Status/Control register value
+*/
+__STATIC_FORCEINLINE  uint32_t __get_FPSCR(void)
+{
+  #if ((defined (__FPU_PRESENT) && (__FPU_PRESENT == 1U)) && \
+       (defined (__FPU_USED   ) && (__FPU_USED    == 1U))     )
+  #if __has_builtin(__builtin_arm_get_fpscr) 
+  // Re-enable using built-in when GCC has been fixed
+  // || (__GNUC__ > 7) || (__GNUC__ == 7 && __GNUC_MINOR__ >= 2)
+    /* see https://gcc.gnu.org/ml/gcc-patches/2017-04/msg00443.html */
+    return __builtin_arm_get_fpscr();
+  #else
+    uint32_t result;
+
+    __ASM volatile ("VMRS %0, fpscr" : "=r" (result) );
+    return(result);
+  #endif
+  #else
+    return(0U);
+  #endif
+}
+
+/**
+  \brief   Set FPSCR
+  \details Assigns the given value to the Floating Point Status/Control register.
+  \param [in] fpscr  Floating Point Status/Control value to set
+*/
+__STATIC_FORCEINLINE void __set_FPSCR(uint32_t fpscr)
+{
+  #if ((defined (__FPU_PRESENT) && (__FPU_PRESENT == 1U)) && \
+       (defined (__FPU_USED   ) && (__FPU_USED    == 1U))     )
+  #if __has_builtin(__builtin_arm_set_fpscr)
+  // Re-enable using built-in when GCC has been fixed
+  // || (__GNUC__ > 7) || (__GNUC__ == 7 && __GNUC_MINOR__ >= 2)
+    /* see https://gcc.gnu.org/ml/gcc-patches/2017-04/msg00443.html */
+    __builtin_arm_set_fpscr(fpscr);
+  #else
+    __ASM volatile ("VMSR fpscr, %0" : : "r" (fpscr) : "vfpcc", "memory");
+  #endif
+  #else
+    (void)fpscr;
+  #endif
+}
+
+/** \brief  Get CPSR Register
+    \return               CPSR Register value
+ */
+__STATIC_FORCEINLINE uint32_t __get_CPSR(void)
+{
+  uint32_t result;
+  __ASM volatile("MRS %0, cpsr" : "=r" (result) );
+  return(result);
+}
+
+/** \brief  Set CPSR Register
+    \param [in]    cpsr  CPSR value to set
+ */
+__STATIC_FORCEINLINE void __set_CPSR(uint32_t cpsr)
+{
+__ASM volatile ("MSR cpsr, %0" : : "r" (cpsr) : "memory");
+}
+
+/** \brief  Get Mode
+    \return                Processor Mode
+ */
+__STATIC_FORCEINLINE uint32_t __get_mode(void)
+{
+    return (__get_CPSR() & 0x1FU);
+}
+
+/** \brief  Set Mode
+    \param [in]    mode  Mode value to set
+ */
+__STATIC_FORCEINLINE void __set_mode(uint32_t mode)
+{
+  __ASM volatile("MSR  cpsr_c, %0" : : "r" (mode) : "memory");
+}
+
+/** \brief  Get Stack Pointer
+    \return Stack Pointer value
+ */
+__STATIC_FORCEINLINE uint32_t __get_SP(void)
+{
+  uint32_t result;
+  __ASM volatile("MOV  %0, sp" : "=r" (result) : : "memory");
+  return result;
+}
+
+/** \brief  Set Stack Pointer
+    \param [in]    stack  Stack Pointer value to set
+ */
+__STATIC_FORCEINLINE void __set_SP(uint32_t stack)
+{
+  __ASM volatile("MOV  sp, %0" : : "r" (stack) : "memory");
+}
+
+/** \brief  Get USR/SYS Stack Pointer
+    \return USR/SYS Stack Pointer value
+ */
+__STATIC_FORCEINLINE uint32_t __get_SP_usr(void)
+{
+  uint32_t cpsr = __get_CPSR();
+  uint32_t result;
+  __ASM volatile(
+    "CPS     #0x1F  \n"
+    "MOV     %0, sp   " : "=r"(result) : : "memory"
+   );
+  __set_CPSR(cpsr);
+  __ISB();
+  return result;
+}
+
+/** \brief  Set USR/SYS Stack Pointer
+    \param [in]    topOfProcStack  USR/SYS Stack Pointer value to set
+ */
+__STATIC_FORCEINLINE void __set_SP_usr(uint32_t topOfProcStack)
+{
+  uint32_t cpsr = __get_CPSR();
+  __ASM volatile(
+    "CPS     #0x1F  \n"
+    "MOV     sp, %0   " : : "r" (topOfProcStack) : "memory"
+   );
+  __set_CPSR(cpsr);
+  __ISB();
+}
+
+/** \brief  Get FPEXC
+    \return               Floating Point Exception Control register value
+ */
+__STATIC_FORCEINLINE uint32_t __get_FPEXC(void)
+{
+#if (__FPU_PRESENT == 1)
+  uint32_t result;
+  __ASM volatile("VMRS %0, fpexc" : "=r" (result) );
+  return(result);
+#else
+  return(0);
+#endif
+}
+
+/** \brief  Set FPEXC
+    \param [in]    fpexc  Floating Point Exception Control value to set
+ */
+__STATIC_FORCEINLINE void __set_FPEXC(uint32_t fpexc)
+{
+#if (__FPU_PRESENT == 1)
+  __ASM volatile ("VMSR fpexc, %0" : : "r" (fpexc) : "memory");
+#endif
+}
+
+/*
+ * Include common core functions to access Coprocessor 15 registers
+ */
+
+#define __get_CP(cp, op1, Rt, CRn, CRm, op2) __ASM volatile("MRC p" # cp ", " # op1 ", %0, c" # CRn ", c" # CRm ", " # op2 : "=r" (Rt) : : "memory" )
+#define __set_CP(cp, op1, Rt, CRn, CRm, op2) __ASM volatile("MCR p" # cp ", " # op1 ", %0, c" # CRn ", c" # CRm ", " # op2 : : "r" (Rt) : "memory" )
+#define __get_CP64(cp, op1, Rt, CRm) __ASM volatile("MRRC p" # cp ", " # op1 ", %Q0, %R0, c" # CRm  : "=r" (Rt) : : "memory" )
+#define __set_CP64(cp, op1, Rt, CRm) __ASM volatile("MCRR p" # cp ", " # op1 ", %Q0, %R0, c" # CRm  : : "r" (Rt) : "memory" )
+
+#include "cmsis_cp15.h"
+
+/** \brief  Enable Floating Point Unit
+
+  Critical section, called from undef handler, so systick is disabled
+ */
+__STATIC_INLINE void __FPU_Enable(void)
+{
+  __ASM volatile(
+    //Permit access to VFP/NEON, registers by modifying CPACR
+    "        MRC     p15,0,R1,c1,c0,2  \n"
+    "        ORR     R1,R1,#0x00F00000 \n"
+    "        MCR     p15,0,R1,c1,c0,2  \n"
+
+    //Ensure that subsequent instructions occur in the context of VFP/NEON access permitted
+    "        ISB                       \n"
+
+    //Enable VFP/NEON
+    "        VMRS    R1,FPEXC          \n"
+    "        ORR     R1,R1,#0x40000000 \n"
+    "        VMSR    FPEXC,R1          \n"
+
+    //Initialise VFP/NEON registers to 0
+    "        MOV     R2,#0             \n"
+
+    //Initialise D16 registers to 0
+    "        VMOV    D0, R2,R2         \n"
+    "        VMOV    D1, R2,R2         \n"
+    "        VMOV    D2, R2,R2         \n"
+    "        VMOV    D3, R2,R2         \n"
+    "        VMOV    D4, R2,R2         \n"
+    "        VMOV    D5, R2,R2         \n"
+    "        VMOV    D6, R2,R2         \n"
+    "        VMOV    D7, R2,R2         \n"
+    "        VMOV    D8, R2,R2         \n"
+    "        VMOV    D9, R2,R2         \n"
+    "        VMOV    D10,R2,R2         \n"
+    "        VMOV    D11,R2,R2         \n"
+    "        VMOV    D12,R2,R2         \n"
+    "        VMOV    D13,R2,R2         \n"
+    "        VMOV    D14,R2,R2         \n"
+    "        VMOV    D15,R2,R2         \n"
+
+#if (defined(__ARM_NEON) && (__ARM_NEON == 1))
+    //Initialise D32 registers to 0
+    "        VMOV    D16,R2,R2         \n"
+    "        VMOV    D17,R2,R2         \n"
+    "        VMOV    D18,R2,R2         \n"
+    "        VMOV    D19,R2,R2         \n"
+    "        VMOV    D20,R2,R2         \n"
+    "        VMOV    D21,R2,R2         \n"
+    "        VMOV    D22,R2,R2         \n"
+    "        VMOV    D23,R2,R2         \n"
+    "        VMOV    D24,R2,R2         \n"
+    "        VMOV    D25,R2,R2         \n"
+    "        VMOV    D26,R2,R2         \n"
+    "        VMOV    D27,R2,R2         \n"
+    "        VMOV    D28,R2,R2         \n"
+    "        VMOV    D29,R2,R2         \n"
+    "        VMOV    D30,R2,R2         \n"
+    "        VMOV    D31,R2,R2         \n"
+#endif
+
+    //Initialise FPSCR to a known state
+    "        VMRS    R2,FPSCR          \n"
+    "        LDR     R3,=0x00086060    \n" //Mask off all bits that do not have to be preserved. Non-preserved bits can/should be zero.
+    "        AND     R2,R2,R3          \n"
+    "        VMSR    FPSCR,R2            "
+  );
+}
+
+#pragma GCC diagnostic pop
+
+#endif /* __CMSIS_GCC_H */