forked from Archive/PX4-Autopilot
97 lines
2.0 KiB
C
97 lines
2.0 KiB
C
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/*
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* rtGetNaN.c
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*
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* Code generation for function 'position_estimator'
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*
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* C source code generated on: Fri Jun 8 13:31:21 2012
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*
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*/
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/*
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* Abstract:
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* MATLAB for code generation function to initialize non-finite, NaN
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*/
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#include "rtGetNaN.h"
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#define NumBitsPerChar 8U
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/* Function: rtGetNaN ==================================================
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* Abstract:
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* Initialize rtNaN needed by the generated code.
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* NaN is initialized as non-signaling. Assumes IEEE.
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*/
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real_T rtGetNaN(void)
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{
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size_t bitsPerReal = sizeof(real_T) * (NumBitsPerChar);
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real_T nan = 0.0;
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if (bitsPerReal == 32U) {
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nan = rtGetNaNF();
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} else {
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uint16_T one = 1U;
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enum {
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LittleEndian,
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BigEndian
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} machByteOrder = (*((uint8_T *) &one) == 1U) ? LittleEndian : BigEndian;
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switch (machByteOrder) {
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case LittleEndian:
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{
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union {
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LittleEndianIEEEDouble bitVal;
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real_T fltVal;
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} tmpVal;
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tmpVal.bitVal.words.wordH = 0xFFF80000U;
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tmpVal.bitVal.words.wordL = 0x00000000U;
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nan = tmpVal.fltVal;
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break;
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}
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case BigEndian:
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{
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union {
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BigEndianIEEEDouble bitVal;
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real_T fltVal;
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} tmpVal;
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tmpVal.bitVal.words.wordH = 0x7FFFFFFFU;
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tmpVal.bitVal.words.wordL = 0xFFFFFFFFU;
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nan = tmpVal.fltVal;
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break;
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}
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}
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}
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return nan;
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}
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/* Function: rtGetNaNF ==================================================
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* Abstract:
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* Initialize rtNaNF needed by the generated code.
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* NaN is initialized as non-signaling. Assumes IEEE.
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*/
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real32_T rtGetNaNF(void)
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{
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IEEESingle nanF = { { 0 } };
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uint16_T one = 1U;
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enum {
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LittleEndian,
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BigEndian
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} machByteOrder = (*((uint8_T *) &one) == 1U) ? LittleEndian : BigEndian;
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switch (machByteOrder) {
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case LittleEndian:
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{
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nanF.wordL.wordLuint = 0xFFC00000U;
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break;
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}
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case BigEndian:
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{
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nanF.wordL.wordLuint = 0x7FFFFFFFU;
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break;
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}
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}
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return nanF.wordL.wordLreal;
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}
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/* End of code generation (rtGetNaN.c) */
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