6 IAR Intrinsic Functions

This section shows a summary of IAR intrinsic functions and the best MPLAB XC32 replacement where that is available. These intrinsic functions and their MPLAB XC32 equivalents are discussed in more detail in the sections that follow. Note that what is referred to as an intrinsic function by IAR documentation is known as a built-in function in the MPLAB XC context. It is recommended that you compare the relevant sections in the MPLAB® XC32 C/C++ Compiler User's Guide with those in your IAR C/C++ Compiler User Guide to ensure that migrated code will work as expected in all situations.

Table 6-1. IAR Intrinsic Functions to MPLAB XC32 equivalents
IAR Intrinsic Function (links to explanatory section)	Suggested MPLAB XC32 Migration
`__arm_cdp, __arm_cdp2`	`__builtin_arm_cdp __builtin_arm_cdp2`
`__arm_ldc, __arm_ldc2`	`__builtin_arm_ldc, __builtin_arm_ldc2`
`__arm_mcr, __arm_mcr2, __arm_mcrr, __arm_mcrr2`	`__builtin_arm_mcr __builtin_arm_mcr2 __builtin_arm_mcrr __builtin_arm_mcrr2`
`__arm_mrc, __arm_mrc2, __arm_mrrc, __arm_mrrc2`	`__builtin_arm_mrc __builtin_arm_mrc2 __builtin_arm_mrrc __builtin_arm_mrrc2`
`__arm_rsr, __arm_rsr64, __arm_rsrp`	Error by XC32
`__arm_stc, __arm_stcl, __arm_stc2, __arm_stc2l`	`__builtin_arm_stc __builtin_arm_stcl __builtin_arm_stc2 __builtin_arm_stc2l`
`__arm_wsr, __arm_wsr64, __arm_wsrp`	No simple migration recommended
`__CDP, __CDP2`	`__builtin_arm_cdp __builtin_arm_cdp2`
`__CLREX`	`__CLREX`
`__CLZ`	`__CLZ`
`__crc32b, __crc32h, __crc32w, __crc32d`	`__builtin_arm_crc32b __builtin_arm_crc32h __builtin_arm_crc32w`
`__crc32cb, __crc32ch, __crc32cw, __crc32cd`	`__builtin_arm_crc32cb __builtin_arm_crc32ch __builtin_arm_crc32cw`
`__disable_debug`	No simple migration recommended
`__disable_fiq`	Ignored by XC32
`__disable_interrupt`	`__set_PRIMASK(1)`
`__disable_irq`	Error by XC32
`__disable_SError`	No simple migration recommended
`__DMB`	`__DMB`
`__DSB`	`__DSB`
`__enable_debug`	Error by XC32
`__enable_fiq`	Ignored by XC32
`__enable_interrupt`	No simple migration recommended
`__enable_irq`	Ignored by XC32
`__enable_SError`	Error by XC32
`__fma, __fmaf`	`__builtin_fma`
`__get_BASEPRI`	`__get_BASEPRI`
`__get_CONTROL`	`__get_CONTROL`
`__get_CPSR`	Error by XC32
`__get_FAULTMASK`	`__get_FAULTMASK`
`__get_FPSCR`	`__get_FPSCR`
`__get_interrupt_state`	Error by XC32
`__get_IPSR`	`__get_IPSR`
`__get_MSP`	`__get_MSP`
`__get_PRIMASK`	`__get_PRIMASK`
`__get_PSP`	`__get_PSP`
`__get_PSR`	`__get_PSR`
`__get_SB`	Not supported
`__get_SP`	`__get_MSP`
`__ISB`	`__ISB`
`__LDC, __LDCL, __LDC2, __LDC2L`	Error by XC32
`__LDC_noidx, __LDCL_noidx, __LDC2_noidx, __LDC2L_noidx`	Error by XC32
`__LDREX, __LDREXB, __LDREXD, __LDREXH`	`_LDREXB, _LDREXH, _LDREXW`
`__no_operation`	`__NOP`
`__PKHBT`	`__PKHBT`
`__PKHTB`	`__PKHTB`
`__PLD, __PLDW`	Error by XC32
`__PLI`	Error by XC32
`__QADD, __QDADD, __QDSUB, __QSUB`	`__QADD`, `__QSUB`
`__QADD8, __QADD16, __QASX, __QSAX, __QSUB8, __QSUB16`	`__QADD8 __QADD16 __QASX __QSAX __QSUB8 __QSUB16`
`__QCFlag`	No simple migration recommended
`__QDOUBLE`	No simple migration recommended
`__QFlag`	No simple migration recommended
`__RBIT`	`__RBIT`
`__reset_Q_flag`	Error by XC32
`__reset_QC_flag`	Error by XC32
`__REV, __REV16, __REVSH`	`__REV, __REV16, __REVSH`
`__rintn, __rintnf`	Not supported
`__ROR`	`__ROR`
`__RRX`	`__RRX`
`__SADD8, __SADD16, __SASX, __SSAX, __SSUB8, __SSUB16`	Use `__SADD8 __SADD16 __SASX __SSAX __SSUB8 __SSUB16`
`__SEL`	`__SEL`
`__set_BASEPRI`	`__set_BASEPRI`
`__set_CONTROL`	`__set_CONTROL`
`__set_CPSR`	Not supported
`__set_FAULTMASK`	`__set_FAULTMASK`
`__set_FPSCR`	Not supported
`__set_interrupt_state`	Not supported
`__set_LR`	Not supported
`__set_MSP`	`__set_MSP`
`__set_PRIMASK`	`__set_PRIMASK`
`__set_PSP`	`__set_PSP`
`__set_SB`	Not supported
`__set_SP`	`__set_MSP`
`__SEV`	`__SEV`
`__SHADD8, __SHADD16, __SHASX, __SHSAX, __SHSUB8, __SHSUB16`	`__SHADD8 __SHADD16 __SHASX __SHSAX __SHSUB8, __SHSUB16`
`__SMLABB, __SMLABT, __SMLATB, __SMLATT, __SMLAWB, __SMLAWT`	Not supported
`__SMLAD, __SMLADX, __SMLSD, __SMLSDX`	`__SMLAD __SMLADX __SMLSD __SMLSDX`
`__SMLALBB, __SMLALBT, __SMLALTB, __SMLALTT`	Not supported
`__SMLALD, __SMLALDX, __SMLSLD, __SMLSLDX`	`__SMLALD __SMLALDX __SMLSLD __SMLSLDX`
`__SMMLA, __SMMLAR, __SMMLS, __SMMLSR`	`__SMMLA`
`__SMMUL, __SMMULR`	Not supported
`__SMUAD, __SMUADX, __SMUSD, __SMUSDX`	`__SMUAD __SMUADX __SMUSD __SMUSDX`
`__SMUL`	Not supported
`__SMULBB, __SMULBT, __SMULTB, __SMULTT, __SMULWB, __SMULWT`	Not supported
`__sqrt, __sqrtf`	`sqrt` , `sqrtf`
`__SSAT`	`__SSAT`
`__SSAT16`	`__SSAT16`
`__STC, __STCL, __STC2, __STC2L`	Not supported
`__STC_noidx, __STCL_noidx, __STC2_noidx, __STC2L_noidx`	Not supported
`__STREX, __STREXB, __STREXD, __STREXH`	`__STREXB, __STREXH`
`__SWP, __SWPB`	Not supported
`__SXTAB, __SXTAB16, __SXTAH, __SXTB16`	`__SXTAB16, __SXTB16`
`__TT, __TTT, __TTA, __TTAT`	`cmse_TT cmse_TTT cmse_TTA cmse_TTAT`
`__UADD8, __UADD16, __UASX, __USAX, __USUB8, __USUB16`	`__UADD8 __UADD16 __UASX __USAX __USUB8 __USUB16`
`__UHADD8, __UHADD16, __UHASX, __UHSAX, __UHSUB8, __UHSUB16`	`__UHADD8 __UHADD16 __UHASX __UHSAX __UHSUB8 __UHSUB16`
`__UMAAL`	Not supported
`__UQADD8, __UQADD16, __UQASX, __UQSAX, __UQSUB8, __UQSUB16`	`__UQADD8 __UQADD16 __UQASX __UQSAX __UQSUB8 __UQSUB16`
`__USAD8, __USADA8`	`__USAD8, __USADA8`
`__USAT`	`__USAT`
`__USAT16`	`__USAT16`
`__UXTAB, __UXTAB16, __UXTAH, __UXTB16`	`__UXTAB16`, `__UXTB16`
`__VFMA_F64, __VFMS_F64, __VFNMA_F64, __VFNMS_F64, __VFMA_F32, __VFMS_F32, __VFNMA_F32, __VFNMS_F32`	Not supported
`__VMINNM_F64, __VMAXNM_F64, __VMINNM_F32, __VMAXNM_F32`	Not supported
`__VRINTA_F64, __VRINTM_F64, __VRINTN_F64, __VRINTP_F64, __VRINTX_F64, __VRINTR_F64, __VRINTZ_F64, __VRINTA_F32, __VRINTM_F32, __VRINTN_F32, __VRINTP_F32, __VRINTX_F32, __VRINTR_F32, __VRINTZ_F32`	Not supported
`__VSQRT_F64, __VSQRT_F32`	Not supported
`__WFE, __WFI, __YIELD`	`__WFE, __WFI`