forked from M-Labs/artiq
compiler: remove big-endian support. Closes #1590
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@ -77,9 +77,6 @@ class Target:
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:var print_function: (string)
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:var print_function: (string)
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Name of a formatted print functions (with the signature of ``printf``)
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Name of a formatted print functions (with the signature of ``printf``)
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provided by the target, e.g. ``"printf"``.
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provided by the target, e.g. ``"printf"``.
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:var little_endian: (boolean)
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Whether the code will be executed on a little-endian machine. This cannot be always
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determined from data_layout due to JIT.
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:var now_pinning: (boolean)
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:var now_pinning: (boolean)
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Whether the target implements the now-pinning RTIO optimization.
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Whether the target implements the now-pinning RTIO optimization.
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"""
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"""
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@ -87,7 +84,6 @@ class Target:
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data_layout = ""
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data_layout = ""
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features = []
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features = []
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print_function = "printf"
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print_function = "printf"
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little_endian = False
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now_pinning = True
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now_pinning = True
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tool_ld = "ld.lld"
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tool_ld = "ld.lld"
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@ -255,15 +251,12 @@ class NativeTarget(Target):
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super().__init__()
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super().__init__()
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self.triple = llvm.get_default_triple()
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self.triple = llvm.get_default_triple()
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host_data_layout = str(llvm.targets.Target.from_default_triple().create_target_machine().target_data)
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host_data_layout = str(llvm.targets.Target.from_default_triple().create_target_machine().target_data)
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assert host_data_layout[0] in "eE"
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self.little_endian = host_data_layout[0] == "e"
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class RISCVTarget(Target):
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class RISCVTarget(Target):
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triple = "riscv32-unknown-linux"
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triple = "riscv32-unknown-linux"
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data_layout = "e-m:e-p:32:32-i64:64-n32-S128"
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data_layout = "e-m:e-p:32:32-i64:64-n32-S128"
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features = ["m", "a"]
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features = ["m", "a"]
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print_function = "core_log"
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print_function = "core_log"
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little_endian = True
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now_pinning = True
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now_pinning = True
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tool_ld = "ld.lld"
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tool_ld = "ld.lld"
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@ -276,7 +269,6 @@ class CortexA9Target(Target):
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data_layout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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data_layout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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features = ["dsp", "fp16", "neon", "vfp3"]
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features = ["dsp", "fp16", "neon", "vfp3"]
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print_function = "core_log"
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print_function = "core_log"
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little_endian = True
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now_pinning = False
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now_pinning = False
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tool_ld = "ld.lld"
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tool_ld = "ld.lld"
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@ -1095,15 +1095,12 @@ class LLVMIRGenerator:
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return self.map(insn.operands[0])
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return self.map(insn.operands[0])
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elif insn.op == "now_mu":
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elif insn.op == "now_mu":
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if self.target.now_pinning:
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if self.target.now_pinning:
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# Word swap now.old for little endian target
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# Word swap now.old as CPU is little endian
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# Most significant word is stored in lower address (see generated csr.rs)
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# Most significant word is stored in lower address (see generated csr.rs)
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if self.target.little_endian:
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llnow_raw = self.llbuilder.load(self.llbuiltin("now"), name=insn.name)
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llnow_raw = self.llbuilder.load(self.llbuiltin("now"), name=insn.name)
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llnow_lo = self.llbuilder.shl(llnow_raw, ll.Constant(lli64, 32))
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llnow_lo = self.llbuilder.shl(llnow_raw, ll.Constant(lli64, 32))
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llnow_hi = self.llbuilder.lshr(llnow_raw, ll.Constant(lli64, 32))
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llnow_hi = self.llbuilder.lshr(llnow_raw, ll.Constant(lli64, 32))
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return self.llbuilder.or_(llnow_lo, llnow_hi)
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return self.llbuilder.or_(llnow_lo, llnow_hi)
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else:
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return self.llbuilder.load(self.llbuiltin("now"), name=insn.name)
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else:
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else:
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return self.llbuilder.call(self.llbuiltin("now_mu"), [])
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return self.llbuilder.call(self.llbuiltin("now_mu"), [])
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elif insn.op == "at_mu":
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elif insn.op == "at_mu":
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@ -1125,12 +1122,13 @@ class LLVMIRGenerator:
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if self.target.now_pinning:
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if self.target.now_pinning:
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llnowptr = self.llbuiltin("now")
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llnowptr = self.llbuiltin("now")
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llnow = self.llbuilder.load(llnowptr, name="now.old")
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llnow = self.llbuilder.load(llnowptr, name="now.old")
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# Word swap now.old for little endian target
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# Word swap now.old as CPU is little endian
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# Most significant word is stored in lower address (see generated csr.rs)
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# Most significant word is stored in lower address (see generated csr.rs)
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if self.target.little_endian:
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llnow_lo = self.llbuilder.shl(llnow, ll.Constant(lli64, 32))
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llnow_lo = self.llbuilder.shl(llnow, ll.Constant(lli64, 32))
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llnow_hi = self.llbuilder.lshr(llnow, ll.Constant(lli64, 32))
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llnow_hi = self.llbuilder.lshr(llnow, ll.Constant(lli64, 32))
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llnow = self.llbuilder.or_(llnow_lo, llnow_hi)
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llnow = self.llbuilder.or_(llnow_lo, llnow_hi)
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lladjusted = self.llbuilder.add(llnow, llinterval, name="now.new")
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lladjusted = self.llbuilder.add(llnow, llinterval, name="now.new")
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lladjusted_hi = self.llbuilder.trunc(self.llbuilder.lshr(lladjusted, ll.Constant(lli64, 32)), lli32)
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lladjusted_hi = self.llbuilder.trunc(self.llbuilder.lshr(lladjusted, ll.Constant(lli64, 32)), lli32)
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lladjusted_lo = self.llbuilder.trunc(lladjusted, lli32)
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lladjusted_lo = self.llbuilder.trunc(lladjusted, lli32)
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