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[AArch64] Add support for C1 CPUs #171124

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46e20c2
[AArch64] Add support for C1 CPUs
dcandler Dec 8, 2025
731a537
fixup! [AArch64] Add support for C1 CPUs
dcandler Dec 9, 2025
77ff4ee
fixup! [AArch64] Add support for C1 CPUs
dcandler Dec 10, 2025
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5 changes: 5 additions & 0 deletions clang/docs/ReleaseNotes.rst
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Expand Up @@ -637,6 +637,11 @@ X86 Support

Arm and AArch64 Support
^^^^^^^^^^^^^^^^^^^^^^^
- Support has been added for the following processors (command-line identifiers in parentheses):
- Arm C1-Nano (``c1-nano``)
- Arm C1-Pro (``c1-pro``)
- Arm C1-Premium (``c1-premium``)
- Arm C1-Ultra (``c1-ultra``)
- More intrinsics for the following AArch64 instructions:
FCVTZ[US], FCVTN[US], FCVTM[US], FCVTP[US], FCVTA[US]

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8 changes: 8 additions & 0 deletions clang/test/Driver/aarch64-mcpu.c
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Expand Up @@ -84,6 +84,14 @@
// CORTEX-A520: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-cpu" "cortex-a520"
// RUN: %clang --target=aarch64 -mcpu=cortex-a520ae -### -c %s 2>&1 | FileCheck -check-prefix=CORTEX-A520AE %s
// CORTEX-A520AE: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-cpu" "cortex-a520ae"
// RUN: %clang --target=aarch64 -mcpu=c1-nano -### -c %s 2>&1 | FileCheck -check-prefix=C1-NANO %s
// C1-NANO: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-cpu" "c1-nano"
// RUN: %clang --target=aarch64 -mcpu=c1-pro -### -c %s 2>&1 | FileCheck -check-prefix=C1-PRO %s
// C1-PRO: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-cpu" "c1-pro"
// RUN: %clang --target=aarch64 -mcpu=c1-premium -### -c %s 2>&1 | FileCheck -check-prefix=C1-PREMIUM %s
// C1-PREMIUM: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-cpu" "c1-premium"
// RUN: %clang --target=aarch64 -mcpu=c1-ultra -### -c %s 2>&1 | FileCheck -check-prefix=C1-ULTRA %s
// C1-ULTRA: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-cpu" "c1-ultra"

// RUN: %clang --target=aarch64 -mcpu=cortex-r82 -### -c %s 2>&1 | FileCheck -check-prefix=CORTEXR82 %s
// CORTEXR82: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-cpu" "cortex-r82"
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69 changes: 69 additions & 0 deletions clang/test/Driver/print-enabled-extensions/aarch64-c1-nano.c
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// REQUIRES: aarch64-registered-target
// RUN: %clang --target=aarch64 --print-enabled-extensions -mcpu=c1-nano | FileCheck --strict-whitespace --implicit-check-not=FEAT_ %s

// CHECK: Extensions enabled for the given AArch64 target
// CHECK-EMPTY:
// CHECK-NEXT: Architecture Feature(s) Description
// CHECK-NEXT: FEAT_AMUv1 Enable Armv8.4-A Activity Monitors extension
// CHECK-NEXT: FEAT_AMUv1p1 Enable Armv8.6-A Activity Monitors Virtualization support
// CHECK-NEXT: FEAT_AdvSIMD Enable Advanced SIMD instructions
// CHECK-NEXT: FEAT_BF16 Enable BFloat16 Extension
// CHECK-NEXT: FEAT_BTI Enable Branch Target Identification
// CHECK-NEXT: FEAT_CCIDX Enable Armv8.3-A Extend of the CCSIDR number of sets
// CHECK-NEXT: FEAT_CHK Enable Armv8.0-A Check Feature Status Extension
// CHECK-NEXT: FEAT_CLRBHB Enable Clear BHB instruction
// CHECK-NEXT: FEAT_CRC32 Enable Armv8.0-A CRC-32 checksum instructions
// CHECK-NEXT: FEAT_CSV2_2 Enable architectural speculation restriction
// CHECK-NEXT: FEAT_DIT Enable Armv8.4-A Data Independent Timing instructions
// CHECK-NEXT: FEAT_DPB Enable Armv8.2-A data Cache Clean to Point of Persistence
// CHECK-NEXT: FEAT_DPB2 Enable Armv8.5-A Cache Clean to Point of Deep Persistence
// CHECK-NEXT: FEAT_DotProd Enable dot product support
// CHECK-NEXT: FEAT_ECV Enable enhanced counter virtualization extension
// CHECK-NEXT: FEAT_ETE Enable Embedded Trace Extension
// CHECK-NEXT: FEAT_FCMA Enable Armv8.3-A Floating-point complex number support
// CHECK-NEXT: FEAT_FGT Enable fine grained virtualization traps extension
// CHECK-NEXT: FEAT_FHM Enable FP16 FML instructions
// CHECK-NEXT: FEAT_FP Enable Armv8.0-A Floating Point Extensions
// CHECK-NEXT: FEAT_FP16 Enable half-precision floating-point data processing
// CHECK-NEXT: FEAT_FPAC Enable Armv8.3-A Pointer Authentication Faulting enhancement
// CHECK-NEXT: FEAT_FRINTTS Enable FRInt[32|64][Z|X] instructions that round a floating-point number to an integer (in FP format) forcing it to fit into a 32- or 64-bit int
// CHECK-NEXT: FEAT_FlagM Enable Armv8.4-A Flag Manipulation instructions
// CHECK-NEXT: FEAT_FlagM2 Enable alternative NZCV format for floating point comparisons
// CHECK-NEXT: FEAT_HBC Enable Armv8.8-A Hinted Conditional Branches Extension
// CHECK-NEXT: FEAT_HCX Enable Armv8.7-A HCRX_EL2 system register
// CHECK-NEXT: FEAT_I8MM Enable Matrix Multiply Int8 Extension
// CHECK-NEXT: FEAT_JSCVT Enable Armv8.3-A JavaScript FP conversion instructions
// CHECK-NEXT: FEAT_LOR Enable Armv8.1-A Limited Ordering Regions extension
// CHECK-NEXT: FEAT_LRCPC Enable support for RCPC extension
// CHECK-NEXT: FEAT_LRCPC2 Enable Armv8.4-A RCPC instructions with Immediate Offsets
// CHECK-NEXT: FEAT_LRCPC3 Enable Armv8.9-A RCPC instructions for A64 and Advanced SIMD and floating-point instruction set
// CHECK-NEXT: FEAT_LSE Enable Armv8.1-A Large System Extension (LSE) atomic instructions
// CHECK-NEXT: FEAT_LSE2 Enable Armv8.4-A Large System Extension 2 (LSE2) atomicity rules
// CHECK-NEXT: FEAT_MOPS Enable Armv8.8-A memcpy and memset acceleration instructions
// CHECK-NEXT: FEAT_MPAM Enable Armv8.4-A Memory system Partitioning and Monitoring extension
// CHECK-NEXT: FEAT_MTE, FEAT_MTE2 Enable Memory Tagging Extension
// CHECK-NEXT: FEAT_NMI, FEAT_GICv3_NMI Enable Armv8.8-A Non-maskable Interrupts
// CHECK-NEXT: FEAT_NV, FEAT_NV2 Enable Armv8.4-A Nested Virtualization Enchancement
// CHECK-NEXT: FEAT_PAN Enable Armv8.1-A Privileged Access-Never extension
// CHECK-NEXT: FEAT_PAN2 Enable Armv8.2-A PAN s1e1R and s1e1W Variants
// CHECK-NEXT: FEAT_PAuth Enable Armv8.3-A Pointer Authentication extension
// CHECK-NEXT: FEAT_PMUv3 Enable Armv8.0-A PMUv3 Performance Monitors extension
// CHECK-NEXT: FEAT_RAS, FEAT_RASv1p1 Enable Armv8.0-A Reliability, Availability and Serviceability Extensions
// CHECK-NEXT: FEAT_RDM Enable Armv8.1-A Rounding Double Multiply Add/Subtract instructions
// CHECK-NEXT: FEAT_SB Enable Armv8.5-A Speculation Barrier
// CHECK-NEXT: FEAT_SEL2 Enable Armv8.4-A Secure Exception Level 2 extension
// CHECK-NEXT: FEAT_SME Enable Scalable Matrix Extension (SME)
// CHECK-NEXT: FEAT_SME2 Enable Scalable Matrix Extension 2 (SME2) instructions
// CHECK-NEXT: FEAT_SPECRES Enable Armv8.5-A execution and data prediction invalidation instructions
// CHECK-NEXT: FEAT_SPECRES2 Enable Speculation Restriction Instruction
// CHECK-NEXT: FEAT_SSBS, FEAT_SSBS2 Enable Speculative Store Bypass Safe bit
// CHECK-NEXT: FEAT_SVE Enable Scalable Vector Extension (SVE) instructions
// CHECK-NEXT: FEAT_SVE2 Enable Scalable Vector Extension 2 (SVE2) instructions
// CHECK-NEXT: FEAT_SVE_BitPerm Enable bit permutation SVE2 instructions
// CHECK-NEXT: FEAT_TLBIOS, FEAT_TLBIRANGE Enable Armv8.4-A TLB Range and Maintenance instructions
// CHECK-NEXT: FEAT_TRBE Enable Trace Buffer Extension
// CHECK-NEXT: FEAT_TRF Enable Armv8.4-A Trace extension
// CHECK-NEXT: FEAT_UAO Enable Armv8.2-A UAO PState
// CHECK-NEXT: FEAT_VHE Enable Armv8.1-A Virtual Host extension
// CHECK-NEXT: FEAT_WFxT Enable Armv8.7-A WFET and WFIT instruction
// CHECK-NEXT: FEAT_XS Enable Armv8.7-A limited-TLB-maintenance instruction
71 changes: 71 additions & 0 deletions clang/test/Driver/print-enabled-extensions/aarch64-c1-premium.c
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// REQUIRES: aarch64-registered-target
// RUN: %clang --target=aarch64 --print-enabled-extensions -mcpu=c1-premium | FileCheck --strict-whitespace --implicit-check-not=FEAT_ %s

// CHECK: Extensions enabled for the given AArch64 target
// CHECK-EMPTY:
// CHECK-NEXT: Architecture Feature(s) Description
// CHECK-NEXT: FEAT_AMUv1 Enable Armv8.4-A Activity Monitors extension
// CHECK-NEXT: FEAT_AMUv1p1 Enable Armv8.6-A Activity Monitors Virtualization support
// CHECK-NEXT: FEAT_AdvSIMD Enable Advanced SIMD instructions
// CHECK-NEXT: FEAT_BF16 Enable BFloat16 Extension
// CHECK-NEXT: FEAT_BTI Enable Branch Target Identification
// CHECK-NEXT: FEAT_CCIDX Enable Armv8.3-A Extend of the CCSIDR number of sets
// CHECK-NEXT: FEAT_CHK Enable Armv8.0-A Check Feature Status Extension
// CHECK-NEXT: FEAT_CLRBHB Enable Clear BHB instruction
// CHECK-NEXT: FEAT_CRC32 Enable Armv8.0-A CRC-32 checksum instructions
// CHECK-NEXT: FEAT_CSV2_2 Enable architectural speculation restriction
// CHECK-NEXT: FEAT_DIT Enable Armv8.4-A Data Independent Timing instructions
// CHECK-NEXT: FEAT_DPB Enable Armv8.2-A data Cache Clean to Point of Persistence
// CHECK-NEXT: FEAT_DPB2 Enable Armv8.5-A Cache Clean to Point of Deep Persistence
// CHECK-NEXT: FEAT_DotProd Enable dot product support
// CHECK-NEXT: FEAT_ECV Enable enhanced counter virtualization extension
// CHECK-NEXT: FEAT_ETE Enable Embedded Trace Extension
// CHECK-NEXT: FEAT_FCMA Enable Armv8.3-A Floating-point complex number support
// CHECK-NEXT: FEAT_FGT Enable fine grained virtualization traps extension
// CHECK-NEXT: FEAT_FHM Enable FP16 FML instructions
// CHECK-NEXT: FEAT_FP Enable Armv8.0-A Floating Point Extensions
// CHECK-NEXT: FEAT_FP16 Enable half-precision floating-point data processing
// CHECK-NEXT: FEAT_FPAC Enable Armv8.3-A Pointer Authentication Faulting enhancement
// CHECK-NEXT: FEAT_FRINTTS Enable FRInt[32|64][Z|X] instructions that round a floating-point number to an integer (in FP format) forcing it to fit into a 32- or 64-bit int
// CHECK-NEXT: FEAT_FlagM Enable Armv8.4-A Flag Manipulation instructions
// CHECK-NEXT: FEAT_FlagM2 Enable alternative NZCV format for floating point comparisons
// CHECK-NEXT: FEAT_HBC Enable Armv8.8-A Hinted Conditional Branches Extension
// CHECK-NEXT: FEAT_HCX Enable Armv8.7-A HCRX_EL2 system register
// CHECK-NEXT: FEAT_I8MM Enable Matrix Multiply Int8 Extension
// CHECK-NEXT: FEAT_JSCVT Enable Armv8.3-A JavaScript FP conversion instructions
// CHECK-NEXT: FEAT_LOR Enable Armv8.1-A Limited Ordering Regions extension
// CHECK-NEXT: FEAT_LRCPC Enable support for RCPC extension
// CHECK-NEXT: FEAT_LRCPC2 Enable Armv8.4-A RCPC instructions with Immediate Offsets
// CHECK-NEXT: FEAT_LRCPC3 Enable Armv8.9-A RCPC instructions for A64 and Advanced SIMD and floating-point instruction set
// CHECK-NEXT: FEAT_LSE Enable Armv8.1-A Large System Extension (LSE) atomic instructions
// CHECK-NEXT: FEAT_LSE2 Enable Armv8.4-A Large System Extension 2 (LSE2) atomicity rules
// CHECK-NEXT: FEAT_MOPS Enable Armv8.8-A memcpy and memset acceleration instructions
// CHECK-NEXT: FEAT_MPAM Enable Armv8.4-A Memory system Partitioning and Monitoring extension
// CHECK-NEXT: FEAT_MTE, FEAT_MTE2 Enable Memory Tagging Extension
// CHECK-NEXT: FEAT_NMI, FEAT_GICv3_NMI Enable Armv8.8-A Non-maskable Interrupts
// CHECK-NEXT: FEAT_NV, FEAT_NV2 Enable Armv8.4-A Nested Virtualization Enchancement
// CHECK-NEXT: FEAT_PAN Enable Armv8.1-A Privileged Access-Never extension
// CHECK-NEXT: FEAT_PAN2 Enable Armv8.2-A PAN s1e1R and s1e1W Variants
// CHECK-NEXT: FEAT_PAuth Enable Armv8.3-A Pointer Authentication extension
// CHECK-NEXT: FEAT_PMUv3 Enable Armv8.0-A PMUv3 Performance Monitors extension
// CHECK-NEXT: FEAT_RAS, FEAT_RASv1p1 Enable Armv8.0-A Reliability, Availability and Serviceability Extensions
// CHECK-NEXT: FEAT_RDM Enable Armv8.1-A Rounding Double Multiply Add/Subtract instructions
// CHECK-NEXT: FEAT_SB Enable Armv8.5-A Speculation Barrier
// CHECK-NEXT: FEAT_SEL2 Enable Armv8.4-A Secure Exception Level 2 extension
// CHECK-NEXT: FEAT_SME Enable Scalable Matrix Extension (SME)
// CHECK-NEXT: FEAT_SME2 Enable Scalable Matrix Extension 2 (SME2) instructions
// CHECK-NEXT: FEAT_SPE Enable Statistical Profiling extension
// CHECK-NEXT: FEAT_SPECRES Enable Armv8.5-A execution and data prediction invalidation instructions
// CHECK-NEXT: FEAT_SPECRES2 Enable Speculation Restriction Instruction
// CHECK-NEXT: FEAT_SPEv1p2 Enable extra register in the Statistical Profiling Extension
// CHECK-NEXT: FEAT_SSBS, FEAT_SSBS2 Enable Speculative Store Bypass Safe bit
// CHECK-NEXT: FEAT_SVE Enable Scalable Vector Extension (SVE) instructions
// CHECK-NEXT: FEAT_SVE2 Enable Scalable Vector Extension 2 (SVE2) instructions
// CHECK-NEXT: FEAT_SVE_BitPerm Enable bit permutation SVE2 instructions
// CHECK-NEXT: FEAT_TLBIOS, FEAT_TLBIRANGE Enable Armv8.4-A TLB Range and Maintenance instructions
// CHECK-NEXT: FEAT_TRBE Enable Trace Buffer Extension
// CHECK-NEXT: FEAT_TRF Enable Armv8.4-A Trace extension
// CHECK-NEXT: FEAT_UAO Enable Armv8.2-A UAO PState
// CHECK-NEXT: FEAT_VHE Enable Armv8.1-A Virtual Host extension
// CHECK-NEXT: FEAT_WFxT Enable Armv8.7-A WFET and WFIT instruction
// CHECK-NEXT: FEAT_XS Enable Armv8.7-A limited-TLB-maintenance instruction
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