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glsl: Generate code for constant ir_binop_ldexp expressions

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ldexp is weird because its two operands have different types.  Add
support for directly specifying the exact signatures of all the possible
variations of an operation.

v2: Use tuple() instead of () for clarity.  Suggested by Dylan.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Acked-by: Dylan Baker <dylan@pnwbakers.com>
This commit is contained in:
Ian Romanick 2016-07-12 10:53:11 -07:00
parent 0f87c54d1c
commit 90da8bf547
1 changed files with 19 additions and 4 deletions
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23
src/compiler/glsl/ir_expression_operation.py
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@ -202,7 +202,7 @@ types_identical_operation = "identical"
non_assign_operation = "nonassign"
class operation(object):
def __init__(self, name, num_operands, printable_name = None, source_types = None, dest_type = None, c_expression = None, flags = None):
def __init__(self, name, num_operands, printable_name = None, source_types = None, dest_type = None, c_expression = None, flags = None, all_signatures = None):
self.name = name
self.num_operands = num_operands
@ -211,7 +211,13 @@ class operation(object):
else:
self.printable_name = printable_name
self.source_types = source_types
self.all_signatures = all_signatures
if source_types is None:
self.source_types = tuple()
else:
self.source_types = source_types
self.dest_type = dest_type
if c_expression is None:
@ -261,6 +267,8 @@ class operation(object):
return constant_template0.render(op=self)
elif self.dest_type is not None:
return constant_template5.render(op=self)
else:
return constant_template3.render(op=self)
return None
@ -276,7 +284,10 @@ class operation(object):
def signatures(self):
return type_signature_iter(self.dest_type, self.source_types, self.num_operands)
if self.all_signatures is not None:
return self.all_signatures
else:
return type_signature_iter(self.dest_type, self.source_types, self.num_operands)
ir_expression_operation = [
@ -469,7 +480,11 @@ ir_expression_operation = [
operation("ubo_load", 2),
# Multiplies a number by two to a power, part of ARB_gpu_shader5.
operation("ldexp", 2),
operation("ldexp", 2,
all_signatures=((float_type, (float_type, int_type)),
(double_type, (double_type, int_type))),
c_expression={'f': "ldexpf_flush_subnormal({src0}, {src1})",
'd': "ldexp_flush_subnormal({src0}, {src1})"}),
# Extract a scalar from a vector
#