dd4d093762
Summary: This patch adds assembly-level support for a new Arm M-profile architecture extension, Custom Datapath Extension (CDE). A brief description of the extension is available at https://developer.arm.com/architectures/instruction-sets/custom-instructions The latest specification for CDE is currently a beta release and is available at https://static.docs.arm.com/ddi0607/aa/DDI0607A_a_armv8m_arm_supplement_cde.pdf CDE allows chip vendors to add custom CPU instructions. The CDE instructions re-use the same encoding space as existing coprocessor instructions (such as MRC, MCR, CDP etc.). Each coprocessor in range cp0-cp7 can be configured as either general purpose (GCP) or custom datapath (CDEv1). This configuration is defined by the CPU vendor and is provided to LLVM using 8 subtarget features: cdecp0 ... cdecp7. The semantics of CDE instructions are implementation-defined, but the instructions are guaranteed to be pure (that is, they are stateless, they do not access memory or any registers except their explicit inputs/outputs). CDE requires the CPU to support at least Armv8.0-M mainline architecture. CDE includes 3 sets of instructions: * Instructions that operate on general purpose registers and NZCV flags * Instructions that operate on the S or D register file (require either FP or MVE extension) * Instructions that operate on the Q register file, require MVE The user-facing names that can be specified on the command line are the same as the 8 subtarget feature names. For example: $ clang -target arm-none-none-eabi -march=armv8m.main+cdecp0+cdecp3 tells the compiler that the coprocessors 0 and 3 are configured as CDEv1 and the remaining coprocessors are configured as GCP (which is the default). Reviewers: simon_tatham, ostannard, dmgreen, eli.friedman Reviewed By: simon_tatham Subscribers: kristof.beyls, hiraditya, cfe-commits, llvm-commits Tags: #clang, #llvm Differential Revision: https://reviews.llvm.org/D74044
28 lines
1.2 KiB
ArmAsm
28 lines
1.2 KiB
ArmAsm
// RUN: not llvm-mc -triple=thumbv8.1m.main -mattr=+mve.fp -mattr=+cdecp0 -mattr=+cdecp1 -show-encoding < %s 2>%t | FileCheck %s
|
|
// RUN: FileCheck <%t --check-prefix=ERROR %s
|
|
|
|
// CHECK: vptete.i8 eq, q0, q0 @ encoding: [0x41,0xfe,0x00,0xef]
|
|
vptete.i8 eq, q0, q0
|
|
// CHECK-NEXT: vcx1t p0, q1, #1234 @ encoding: [0x29,0xec,0xd2,0x20]
|
|
vcx1t p0, q1, #1234
|
|
// CHECK-NEXT: vcx1ae p1, q5, #4095 @ encoding: [0x2f,0xfd,0xff,0xa1]
|
|
vcx1ae p1, q5, #4095
|
|
// CHECK-NEXT: vcx2t p1, q0, q6, #123 @ encoding: [0x3e,0xed,0xdc,0x01]
|
|
vcx2t p1, q0, q6, #123
|
|
// CHECK-NEXT: vcx2ae p1, q3, q7, #127 @ encoding: [0x3f,0xfd,0xde,0x61]
|
|
vcx2ae p1, q3, q7, #127
|
|
// CHECK-NEXT: vpte.i8 eq, q0, q0 @ encoding: [0x41,0xfe,0x00,0x8f]
|
|
vpte.i8 eq, q0, q0
|
|
// CHECK-NEXT: vcx3at p1, q3, q7, q6, #15 @ encoding: [0xbe,0xfd,0x5c,0x61]
|
|
vcx3at p1, q3, q7, q6, #15
|
|
// CHECK-NEXT: vcx3e p0, q0, q2, q0, #12 @ encoding: [0xa4,0xed,0x40,0x00]
|
|
vcx3e p0, q0, q2, q0, #12
|
|
|
|
vpt.i8 eq, q0, q0
|
|
// ERROR: [[@LINE+1]]:{{[0-9]+}}: error: incorrect predication in VPT block; got 'none', but expected 't'
|
|
vcx1 p0, q1, #1234
|
|
|
|
vpt.i8 eq, q0, q0
|
|
// ERROR: [[@LINE+1]]:{{[0-9]+}}: error: invalid instruction
|
|
vcx3t p0, d0, d1, d7, #1
|