54 lines
1.7 KiB
Python
54 lines
1.7 KiB
Python
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""" This module provides the unsafe things for targets/numbers.py
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"""
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from numba.core import types, errors
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from numba.core.extending import intrinsic
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from llvmlite import ir
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@intrinsic
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def viewer(tyctx, val, viewty):
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""" Bitcast a scalar 'val' to the given type 'viewty'. """
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bits = val.bitwidth
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if isinstance(viewty.dtype, types.Integer):
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bitcastty = ir.IntType(bits)
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elif isinstance(viewty.dtype, types.Float):
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bitcastty = ir.FloatType() if bits == 32 else ir.DoubleType()
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else:
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assert 0, "unreachable"
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def codegen(cgctx, builder, typ, args):
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flt = args[0]
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return builder.bitcast(flt, bitcastty)
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retty = viewty.dtype
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sig = retty(val, viewty)
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return sig, codegen
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@intrinsic
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def trailing_zeros(typeingctx, src):
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"""Counts trailing zeros in the binary representation of an integer."""
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if not isinstance(src, types.Integer):
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msg = ("trailing_zeros is only defined for integers, but value passed "
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f"was '{src}'.")
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raise errors.NumbaTypeError(msg)
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def codegen(context, builder, signature, args):
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[src] = args
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return builder.cttz(src, ir.Constant(ir.IntType(1), 0))
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return src(src), codegen
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@intrinsic
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def leading_zeros(typeingctx, src):
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"""Counts leading zeros in the binary representation of an integer."""
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if not isinstance(src, types.Integer):
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msg = ("leading_zeros is only defined for integers, but value passed "
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f"was '{src}'.")
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raise errors.NumbaTypeError(msg)
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def codegen(context, builder, signature, args):
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[src] = args
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return builder.ctlz(src, ir.Constant(ir.IntType(1), 0))
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return src(src), codegen
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