[Mesa-dev] [PATCH 3/5] nir: add new constant folding infrastructure
Juha-Pekka Heikkila
juhapekka.heikkila at gmail.com
Mon Jan 26 01:25:09 PST 2015
On 20.01.2015 21:43, Jason Ekstrand wrote:
>
>
> On Mon, Jan 19, 2015 at 5:01 PM, Connor Abbott <cwabbott0 at gmail.com
> <mailto:cwabbott0 at gmail.com>> wrote:
>
> On Mon, Jan 19, 2015 at 4:04 PM, Jason Ekstrand
> <jason at jlekstrand.net <mailto:jason at jlekstrand.net>> wrote:
> > I've got some specific comments below, but I want to make some
> more general
> > comments here. I like this in principle: having all the opcodes
> > self-documenting is wonderful. However, I'm not terribly happy
> with the way
> > it worked out. A lot of the codegen stuff is very confusing and
> its not at
> > all obvious what's going on. I'll give it some thought and see if
> I can
> > come up with a good way to clean it up.
> >
> > On Jan 16, 2015 3:46 PM, "Connor Abbott" <cwabbott0 at gmail.com
> <mailto:cwabbott0 at gmail.com>> wrote:
> >>
> >> Add a required field to the Opcode class, const_expr, that
> contains an
> >> expression or statement that computes the result of the opcode
> given known
> >> constant inputs. Then take those const_expr's and expand them into a
> >> function
> >> that takes an opcode and an array of constant inputs and spits
> out the
> >> constant
> >> result. This means that when adding opcodes, there's one less
> place to
> >> update,
> >> and almost all the opcodes are self-documenting since the
> information on
> >> how to
> >> compute the result is right next to the definition.
> >>
> >> The helper functions in nir_constant_expressions.c were taken from
> >> ir_constant_expressions.cpp.
> >>
> >> v2: use Python formatting and get rid of regex's
> >> Signed-off-by: Connor Abbott <cwabbott0 at gmail.com
> <mailto:cwabbott0 at gmail.com>>
> >> ---
> >> src/glsl/Makefile.am | 10 +-
> >> src/glsl/Makefile.sources | 3 +-
> >> src/glsl/nir/.gitignore | 1 +
> >> src/glsl/nir/nir_constant_expressions.h | 32 ++
> >> src/glsl/nir/nir_constant_expressions.py | 320 ++++++++++++++++++
> >> src/glsl/nir/nir_opcodes.py | 562
> >> +++++++++++++++++++++----------
> >> 6 files changed, 740 insertions(+), 188 deletions(-)
> >> create mode 100644 src/glsl/nir/nir_constant_expressions.h
> >> create mode 100644 src/glsl/nir/nir_constant_expressions.py
> >>
> >> diff --git a/src/glsl/Makefile.am b/src/glsl/Makefile.am
> >> index b2fe16a..51036b7 100644
> >> --- a/src/glsl/Makefile.am
> >> +++ b/src/glsl/Makefile.am
> >> @@ -210,7 +210,8 @@ BUILT_SOURCES =
> >> \
> >> glcpp/glcpp-lex.c \
> >> nir/nir_opt_algebraic.c \
> >> nir/nir_opcodes.h \
> >> - nir/nir_opcodes.c
> >> + nir/nir_opcodes.c \
> >> + nir/nir_constant_expressions.c
> >> CLEANFILES = \
> >> glcpp/glcpp-parse.h \
> >> glsl_parser.h \
> >> @@ -236,3 +237,10 @@ nir/nir_opcodes.c: nir/nir_opcodes.py
> >> nir/nir_opcodes_c.py
> >> $(PYTHON2) $(PYTHON_FLAGS) $(srcdir)/nir/nir_opcodes_c.py
> > $@
> >>
> >> nir/nir.h: nir/nir_opcodes.h
> >> +
> >> +nir/nir_constant_expressions.c: nir/nir_opcodes.py
> >> nir/nir_constant_expressions.py nir/nir_constant_expressions.h
> >> + $(AM_V_GEN)set -e;
> >> \
> >> + $(MKDIR_P) `dirname $@`;
> >> \
> >> + $(PYTHON2) $(PYTHON_FLAGS)
> >> $(srcdir)/nir/nir_constant_expressions.py > $@.tmp; \
> >> + mv $@.tmp $@;
> >> +
> >> diff --git a/src/glsl/Makefile.sources b/src/glsl/Makefile.sources
> >> index 03b4f2e..9dd1a56 100644
> >> --- a/src/glsl/Makefile.sources
> >> +++ b/src/glsl/Makefile.sources
> >> @@ -16,7 +16,8 @@ LIBGLCPP_GENERATED_FILES = \
> >> NIR_GENERATED_FILES = \
> >> $(GLSL_BUILDDIR)/nir/nir_opt_algebraic.c \
> >> $(GLSL_BUILDDIR)/nir/nir_opcodes.h \
> >> - $(GLSL_BUILDDIR)/nir/nir_opcodes.c
> >> + $(GLSL_BUILDDIR)/nir/nir_opcodes.c \
> >> + $(GLSL_BUILDDIR)/nir/nir_constant_expressions.c
> >>
> >> NIR_FILES = \
> >> $(GLSL_SRCDIR)/nir/nir.c \
> >> diff --git a/src/glsl/nir/.gitignore b/src/glsl/nir/.gitignore
> >> index 4c28193..261f64f 100644
> >> --- a/src/glsl/nir/.gitignore
> >> +++ b/src/glsl/nir/.gitignore
> >> @@ -1,3 +1,4 @@
> >> nir_opt_algebraic.c
> >> nir_opcodes.c
> >> nir_opcodes.h
> >> +nir_constant_expressions.c
> >> diff --git a/src/glsl/nir/nir_constant_expressions.h
> >> b/src/glsl/nir/nir_constant_expressions.h
> >> new file mode 100644
> >> index 0000000..4ca09be
> >> --- /dev/null
> >> +++ b/src/glsl/nir/nir_constant_expressions.h
> >> @@ -0,0 +1,32 @@
> >> +/*
> >> + * Copyright © 2014 Connor Abbott
> >> + *
> >> + * Permission is hereby granted, free of charge, to any person
> obtaining
> >> a
> >> + * copy of this software and associated documentation files (the
> >> "Software"),
> >> + * to deal in the Software without restriction, including without
> >> limitation
> >> + * the rights to use, copy, modify, merge, publish, distribute,
> >> sublicense,
> >> + * and/or sell copies of the Software, and to permit persons to
> whom the
> >> + * Software is furnished to do so, subject to the following
> conditions:
> >> + *
> >> + * The above copyright notice and this permission notice
> (including the
> >> next
> >> + * paragraph) shall be included in all copies or substantial
> portions of
> >> the
> >> + * Software.
> >> + *
> >> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> >> EXPRESS OR
> >> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> >> MERCHANTABILITY,
> >> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
> EVENT
> >> SHALL
> >> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
> DAMAGES OR
> >> OTHER
> >> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> >> ARISING
> >> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> OTHER
> >> DEALINGS
> >> + * IN THE SOFTWARE.
> >> + *
> >> + * Authors:
> >> + * Connor Abbott (cwabbott0 at gmail.com
> <mailto:cwabbott0 at gmail.com>)
> >> + *
> >> + */
> >> +
> >> +#include "nir.h"
> >> +
> >> +nir_const_value nir_eval_const_opcode(nir_op op, unsigned
> num_components,
> >> + nir_const_value *src);
> >> +
> >> diff --git a/src/glsl/nir/nir_constant_expressions.py
> >> b/src/glsl/nir/nir_constant_expressions.py
> >> new file mode 100644
> >> index 0000000..8498fc3
> >> --- /dev/null
> >> +++ b/src/glsl/nir/nir_constant_expressions.py
> >> @@ -0,0 +1,320 @@
> >> +#! /usr/bin/env python
> >> +#
> >> +# Copyright (C) 2014 Connor Abbott
> >> +#
> >> +# Permission is hereby granted, free of charge, to any person
> obtaining a
> >> +# copy of this software and associated documentation files (the
> >> "Software"),
> >> +# to deal in the Software without restriction, including without
> >> limitation
> >> +# the rights to use, copy, modify, merge, publish, distribute,
> >> sublicense,
> >> +# and/or sell copies of the Software, and to permit persons to
> whom the
> >> +# Software is furnished to do so, subject to the following
> conditions:
> >> +#
> >> +# The above copyright notice and this permission notice
> (including the
> >> next
> >> +# paragraph) shall be included in all copies or substantial
> portions of
> >> the
> >> +# Software.
> >> +#
> >> +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
> KIND, EXPRESS
> >> OR
> >> +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> >> MERCHANTABILITY,
> >> +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
> >> SHALL
> >> +# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
> DAMAGES OR
> >> OTHER
> >> +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
> OTHERWISE, ARISING
> >> +# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> OTHER
> >> DEALINGS
> >> +# IN THE SOFTWARE.
> >> +#
> >> +# Authors:
> >> +# Connor Abbott (cwabbott0 at gmail.com
> <mailto:cwabbott0 at gmail.com>)
> >> +
> >> +from nir_opcodes import opcodes
> >> +from mako.template import Template
> >> +
> >> +# the const_expr string for each opcode has a few shortcuts -
> most only
> >> have
> >> +# an expression, and the "dst = (expr);" is implied. In addition,
> >> +# per-component inputs and outputs are referenced without any
> subscripts,
> >> so
> >> +# we need to create the implicit for-loop for per-component
> opcodes. In
> >> +# addition, we need to expand out the src0, src1, etc. with actual
> >> sources
> >> +# with the appropriate type using the union.
> >> +
> >> +def wr(string, wrap_bool):
> >> + if wrap_bool:
> >> + return "((" + string + ") ? NIR_TRUE : NIR_FALSE)"
> >> + return string
> >> +
> >> +class Operand(object):
> >> + def __init__(self, name, type_, is_src):
> >> + if type_ == "bool" or type_ == "unsigned":
> >> + prefix = "u"
> >> + elif type_ == "int":
> >> + prefix = "i"
> >> + else:
> >> + prefix = "f"
> >> +
> >> + wrap_bool = is_src and type_ == "bool"
> >> +
> >> + def wr(string, wrap=wrap_bool):
> >> + if wrap:
> >> + return "(" + string + " != NIR_FALSE)"
> >> + return string
> >
> > Wow, this is confusing... You redefine a global function locally to do
> > something similar but very different. Then give it two parameters
> one of
> > which has a default value that comes from the argument of the parent
> > function. On top of that, its never used with its argument so the
> argument
> > isn't needed at all. I think we can do better than this...
>
> Whoops, I meant to delete the global version of wr() above :/ also, I
> can rename it to wrap() if you want. I added the argument because I
> thought it was necessary, but it turns out Python does support a weak
> form of closures (it won't keep them alive once you escape the context
> of the outer function), so this isn't actually necessary. I'll fix
> this, plus a similar thing in unop_reduce() and binop_reduce().
>
> >
> >> +
> >> + self.name <http://self.name> = wr(name + "." + prefix + "[_i]")
> >
> > Calling that "name" seems kind of odd.
>
> Yeah, I called it that because I was thinking of it as the "name" of
> the operand since calling str() on the object would return it, but it
> seems like "per_component" would probably be a better name.
>
> >
> >> + self.x = wr(name + "." + prefix + "[0]")
> >> + self.y = wr(name + "." + prefix + "[1]")
> >> + self.z = wr(name + "." + prefix + "[2]")
> >> + self.w = wr(name + "." + prefix + "[3]")
> >> +
> >> + def __str__(self):
> >> + return self.name <http://self.name>
> >> +
> >> +def expand_constexpr(opcode):
> >> + const_expr = opcode.const_expr
> >> +
> >> + if "dst" not in const_expr:
> >> + if opcode.output_type == "bool":
> >> + # For convenience, insert the conversion to unsigned.
> >> + # Note that we don't do this for things that aren't
> expressions.
> >> + const_expr = "(" + const_expr + ") ? NIR_TRUE : NIR_FALSE"
> >> +
> >> + if opcode.output_size == 0:
> >> + const_expr = "{dst} = " + const_expr + ";"
> >> + else:
> >> + # for non-per-component opcodes, assume we broadcast to all
> >> components
> >> + const_expr = "\n".join(
> >> + "{dst." + "xyzw"[i] + "} = " + const_expr + ";"
> >> + for i in range(opcode.output_size))
> >> +
> >> + replacement_dict = {
> >> + "src" + str(i) : Operand("src[" + str(i) + "]",
> >> opcode.input_types[i], True)
> >> + for i in range(opcode.num_inputs)
> >> + }
> >> +
> >> + replacement_dict["dst"] = Operand("dst", opcode.output_type,
> False)
> >> +
> >> + const_expr = const_expr.format(**replacement_dict)
> >> +
> >> + if opcode.output_size == 0:
> >> + const_expr = "for (unsigned _i = 0; _i < num_components;
> _i++) {" +
> >> const_expr + "}"
> >> +
> >> + return const_expr
> >
> > I can't help but think that the above is far more confusing than
> needed.
> > Also, I'd rather do as much of this in the mako as possible.
> That's why we
> > are using a templating language after all.
>
> Is there anything in Mako that would really help us here? The things
> that need to be done are:
>
> - replacing a pure expression with "dst = ..." or "dst = (...) ?
> NIR_TRUE : NIR_FALSE" for bools
> - adding the for loop for per-component things
> - replacing e.g. ${src0.x} with src[0].f[0] for floats or (src[0].u[0]
> != NIR_FALSE) for bools
>
> The problem with Mako is that the only thing it offers is the ability
> to do fancier formatting in the source string, when we don't really
> need that: we want the source string to be as simple as possible. It's
> the transformations on the source string that are more complicated, so
> what we're doing is closer to text substitution than formatting. That
> being said, if you can come up with something better than this or the
> pile of regex's that we had before, I'm all ears.
>
>
> I think this can be cleaned up later. It'll be easier to do that as a
> patch on top of this. Let's deal with it later.
>
>
>
> >
> >> +
> >> +
> >> +const_exprs = {name : expand_constexpr(opcode)
> >> + for name, opcode in opcodes.iteritems()}
> >> +
> >> +template = Template("""
> >> +#include <math.h>
> >> +#include "main/core.h"
> >> +#include "nir_constant_expressions.h"
> >> +
> >> +#if defined(_MSC_VER) && (_MSC_VER < 1800)
> >> +static int isnormal(double x)
> >> +{
> >> + return _fpclass(x) == _FPCLASS_NN || _fpclass(x) == _FPCLASS_PN;
> >> +}
> >> +#elif defined(__SUNPRO_CC)
> >> +#include <ieeefp.h>
> >> +static int isnormal(double x)
> >> +{
> >> + return fpclass(x) == FP_NORMAL;
> >> +}
> >> +#endif
> >> +
> >> +#if defined(_MSC_VER)
> >> +static double copysign(double x, double y)
> >> +{
> >> + return _copysign(x, y);
> >> +}
> >> +#endif
> >> +
> >> +/**
> >> + * Evaluate one component of packSnorm4x8.
> >> + */
> >> +static uint8_t
> >> +pack_snorm_1x8(float x)
> >> +{
> >> + /* From section 8.4 of the GLSL 4.30 spec:
> >> + *
> >> + * packSnorm4x8
> >> + * ------------
> >> + * The conversion for component c of v to fixed point is
> done as
> >> + * follows:
> >> + *
> >> + * packSnorm4x8: round(clamp(c, -1, +1) * 127.0)
> >> + *
> >> + * We must first cast the float to an int, because casting a
> negative
> >> + * float to a uint is undefined.
> >> + */
> >> + return (uint8_t) (int8_t)
> >> + _mesa_round_to_even(CLAMP(x, -1.0f, +1.0f) * 127.0f);
> >> +}
> >> +
> >> +/**
> >> + * Evaluate one component of packSnorm2x16.
> >> + */
> >> +static uint16_t
> >> +pack_snorm_1x16(float x)
> >> +{
> >> + /* From section 8.4 of the GLSL ES 3.00 spec:
> >> + *
> >> + * packSnorm2x16
> >> + * -------------
> >> + * The conversion for component c of v to fixed point is
> done as
> >> + * follows:
> >> + *
> >> + * packSnorm2x16: round(clamp(c, -1, +1) * 32767.0)
> >> + *
> >> + * We must first cast the float to an int, because casting a
> negative
> >> + * float to a uint is undefined.
> >> + */
> >> + return (uint16_t) (int16_t)
> >> + _mesa_round_to_even(CLAMP(x, -1.0f, +1.0f) * 32767.0f);
> >> +}
> >> +
> >> +/**
> >> + * Evaluate one component of unpackSnorm4x8.
> >> + */
> >> +static float
> >> +unpack_snorm_1x8(uint8_t u)
> >> +{
> >> + /* From section 8.4 of the GLSL 4.30 spec:
> >> + *
> >> + * unpackSnorm4x8
> >> + * --------------
> >> + * The conversion for unpacked fixed-point value f to
> floating
> >> point is
> >> + * done as follows:
> >> + *
> >> + * unpackSnorm4x8: clamp(f / 127.0, -1, +1)
> >> + */
> >> + return CLAMP((int8_t) u / 127.0f, -1.0f, +1.0f);
> >> +}
> >> +
> >> +/**
> >> + * Evaluate one component of unpackSnorm2x16.
> >> + */
> >> +static float
> >> +unpack_snorm_1x16(uint16_t u)
> >> +{
> >> + /* From section 8.4 of the GLSL ES 3.00 spec:
> >> + *
> >> + * unpackSnorm2x16
> >> + * ---------------
> >> + * The conversion for unpacked fixed-point value f to
> floating
> >> point is
> >> + * done as follows:
> >> + *
> >> + * unpackSnorm2x16: clamp(f / 32767.0, -1, +1)
> >> + */
> >> + return CLAMP((int16_t) u / 32767.0f, -1.0f, +1.0f);
> >> +}
> >> +
> >> +/**
> >> + * Evaluate one component packUnorm4x8.
> >> + */
> >> +static uint8_t
> >> +pack_unorm_1x8(float x)
> >> +{
> >> + /* From section 8.4 of the GLSL 4.30 spec:
> >> + *
> >> + * packUnorm4x8
> >> + * ------------
> >> + * The conversion for component c of v to fixed point is
> done as
> >> + * follows:
> >> + *
> >> + * packUnorm4x8: round(clamp(c, 0, +1) * 255.0)
> >> + */
> >> + return (uint8_t) _mesa_round_to_even(CLAMP(x, 0.0f, 1.0f) *
> 255.0f);
> >> +}
> >> +
> >> +/**
> >> + * Evaluate one component packUnorm2x16.
> >> + */
> >> +static uint16_t
> >> +pack_unorm_1x16(float x)
> >> +{
> >> + /* From section 8.4 of the GLSL ES 3.00 spec:
> >> + *
> >> + * packUnorm2x16
> >> + * -------------
> >> + * The conversion for component c of v to fixed point is
> done as
> >> + * follows:
> >> + *
> >> + * packUnorm2x16: round(clamp(c, 0, +1) * 65535.0)
> >> + */
> >> + return (uint16_t) _mesa_round_to_even(CLAMP(x, 0.0f, 1.0f) *
> >> 65535.0f);
> >> +}
> >> +
> >> +/**
> >> + * Evaluate one component of unpackUnorm4x8.
> >> + */
> >> +static float
> >> +unpack_unorm_1x8(uint8_t u)
> >> +{
> >> + /* From section 8.4 of the GLSL 4.30 spec:
> >> + *
> >> + * unpackUnorm4x8
> >> + * --------------
> >> + * The conversion for unpacked fixed-point value f to
> floating
> >> point is
> >> + * done as follows:
> >> + *
> >> + * unpackUnorm4x8: f / 255.0
> >> + */
> >> + return (float) u / 255.0f;
> >> +}
> >> +
> >> +/**
> >> + * Evaluate one component of unpackUnorm2x16.
> >> + */
> >> +static float
> >> +unpack_unorm_1x16(uint16_t u)
> >> +{
> >> + /* From section 8.4 of the GLSL ES 3.00 spec:
> >> + *
> >> + * unpackUnorm2x16
> >> + * ---------------
> >> + * The conversion for unpacked fixed-point value f to
> floating
> >> point is
> >> + * done as follows:
> >> + *
> >> + * unpackUnorm2x16: f / 65535.0
> >> + */
> >> + return (float) u / 65535.0f;
> >> +}
> >> +
> >> +/**
> >> + * Evaluate one component of packHalf2x16.
> >> + */
> >> +static uint16_t
> >> +pack_half_1x16(float x)
> >> +{
> >> + return _mesa_float_to_half(x);
> >> +}
> >> +
> >> +/**
> >> + * Evaluate one component of unpackHalf2x16.
> >> + */
> >> +static float
> >> +unpack_half_1x16(uint16_t u)
> >> +{
> >> + return _mesa_half_to_float(u);
> >> +}
> >> +
> >> +nir_const_value
> >> +nir_eval_const_opcode(nir_op op, unsigned num_components,
> >> + nir_const_value *src)
> >> +{
> >> + nir_const_value dst = {
> >> + .u = {0, 0, 0, 0}
> >> + };
> >> +
> >> + switch (op) {
> >> +% for name, const_expr in sorted(const_exprs.iteritems()):
> >> + case nir_op_${name}: {
> >> + ${const_expr}
> >> + break;
> >> + }
> >> +% endfor
> >> + case nir_num_opcodes: unreachable("shouldn't get here");
> >> + }
> >> +
> >> + return dst;
> >> +}
> >> +""")
> >> +
> >> +print template.render(const_exprs=const_exprs)
> >> +
> >> diff --git a/src/glsl/nir/nir_opcodes.py
> b/src/glsl/nir/nir_opcodes.py
> >> index fa2f563..6f3c5ba 100644
> >> --- a/src/glsl/nir/nir_opcodes.py
> >> +++ b/src/glsl/nir/nir_opcodes.py
> >> @@ -24,6 +24,7 @@
> >> # Authors:
> >> # Connor Abbott (cwabbott0 at gmail.com
> <mailto:cwabbott0 at gmail.com>)
> >>
> >> +
> >> # Class that represents all the information we have about the opcode
> >> # NOTE: this must be kept in sync with nir_op_info
> >>
> >> @@ -34,7 +35,7 @@ class Opcode:
> >> # algebraic_properties is a space-seperated string,
> >> # where nir_op_is_ is prepended before each entry
> >> def __init__(self, name, output_size, output_type, input_sizes,
> >> - input_types, algebraic_properties):
> >> + input_types, algebraic_properties, const_expr):
> >> assert(isinstance(name, str))
> >> assert(isinstance(output_size, int))
> >> assert(isinstance(output_type, str))
> >> @@ -43,6 +44,7 @@ class Opcode:
> >> assert(isinstance(input_types, list))
> >> assert(isinstance(input_types[0], str))
> >> assert(isinstance(algebraic_properties, str))
> >> + assert(isinstance(const_expr, str))
> >> assert(len(input_sizes) == len(input_types))
> >> assert(0 <= output_size <= 4)
> >> for size in input_sizes:
> >> @@ -56,6 +58,7 @@ class Opcode:
> >> self.input_sizes = input_sizes
> >> self.input_types = input_types
> >> self.algebraic_properties = algebraic_properties
> >> + self.const_expr = const_expr
> >>
> >> # helper variables for strings
> >> tfloat = "float"
> >> @@ -70,178 +73,290 @@ associative = "associative "
> >> opcodes = {}
> >>
> >> def opcode(name, output_size, output_type, input_sizes, input_types,
> >> - algebraic_properties):
> >> + algebraic_properties, const_expr):
> >> assert(name not in opcodes)
> >> opcodes[name] = Opcode(name, output_size, output_type,
> input_sizes,
> >> - input_types, algebraic_properties)
> >> -
> >> -def unop_convert(name, in_type, out_type):
> >> - opcode(name, 0, out_type, [0], [in_type], "")
> >> -
> >> -def unop(name, ty):
> >> - opcode(name, 0, ty, [0], [ty], "")
> >> -
> >> -def unop_horiz(name, output_size, output_type, input_size,
> input_type):
> >> - opcode(name, output_size, output_type, [input_size],
> [input_type], "")
> >> -
> >> -def unop_reduce(name, output_size, output_type, input_type):
> >> - unop_horiz(name + "2", output_size, output_type, 2, input_type)
> >> - unop_horiz(name + "3", output_size, output_type, 3, input_type)
> >> - unop_horiz(name + "4", output_size, output_type, 4, input_type)
> >> + input_types, algebraic_properties,
> const_expr)
> >> +
> >> +def unop_convert(name, in_type, out_type, const_expr):
> >> + opcode(name, 0, out_type, [0], [in_type], "", const_expr)
> >> +
> >> +def unop(name, ty, const_expr):
> >> + opcode(name, 0, ty, [0], [ty], "", const_expr)
> >> +
> >> +def unop_horiz(name, output_size, output_type, input_size,
> input_type,
> >> + const_expr):
> >> + opcode(name, output_size, output_type, [input_size],
> [input_type], "",
> >> + const_expr)
> >> +
> >> +def unop_reduce(name, output_size, output_type, input_type,
> >> prereduce_expr,
> >> + reduce_expr, final_expr):
> >> + def prereduce(src, expr=prereduce_expr):
> >> + return "(" + expr.format(src=src) + ")"
> >> + def final(src, expr=final_expr):
> >> + return expr.format(src="(" + src + ")")
> >> + def reduce_(src0, src1, expr=reduce_expr):
> >> + return expr.format(src0=src0, src1=src1)
> >> + src0 = prereduce("{src0.x}")
> >> + src1 = prereduce("{src0.y}")
> >> + src2 = prereduce("{src0.z}")
> >> + src3 = prereduce("{src0.w}")
> >> + unop_horiz(name + "2", output_size, output_type, 2, input_type,
> >> + final(reduce_(src0, src1)))
> >> + unop_horiz(name + "3", output_size, output_type, 3, input_type,
> >> + final(reduce_(reduce_(src0, src1), src2)))
> >> + unop_horiz(name + "4", output_size, output_type, 4, input_type,
> >> + final(reduce_(reduce_(src0, src1), reduce_(src2,
> src3))))
> >
> > I really don't like the way this worked out. That said, I can't
> come up
> > with anything better at the moment, so I won't complain too much.
>
> Meh, I think it's ok... the only thing is the extra arguments to
> prereduce(), final(), and reduce_() that we can get rid of.
>
>
> Like I said. I can't come up with anything better. Assuming the two
> changes above are made (wr and per_component), this is
> Reviewed-by: Jason Ekstrand <jason.ekstrand at intel.com
> <mailto:jason.ekstrand at intel.com>>
>
>
>
> >
> >>
> >> # These two move instructions differ in what modifiers they
> support and
> >> what
> >> # the negate modifier means. Otherwise, they are identical.
> >> -unop("fmov", tfloat)
> >> -unop("imov", tint)
> >> -
> >> -unop("ineg", tint)
> >> -unop("fneg", tfloat)
> >> -unop("inot", tint) # invert every bit of the integer
> >> -unop("fnot", tfloat) # (src == 0.0) ? 1.0 : 0.0
> >> -unop("fsign", tfloat)
> >> -unop("isign", tint)
> >> -unop("iabs", tint)
> >> -unop("fabs", tfloat)
> >> -unop("fsat", tfloat)
> >> -unop("frcp", tfloat)
> >> -unop("frsq", tfloat)
> >> -unop("fsqrt", tfloat)
> >> -unop("fexp", tfloat) # < e^x
> >> -unop("flog", tfloat) # log base e
> >> -unop("fexp2", tfloat)
> >> -unop("flog2", tfloat)
> >> -unop_convert("f2i", tfloat, tint) # Float-to-integer conversion.
> >> -unop_convert("f2u", tfloat, tunsigned) # Float-to-unsigned
> conversion
> >> -unop_convert("i2f", tint, tfloat) # Integer-to-float conversion.
> >> -unop_convert("f2b", tfloat, tbool) # Float-to-boolean conversion
> >> -unop_convert("b2f", tbool, tfloat) # Boolean-to-float conversion
> >> -unop_convert("i2b", tint, tbool) # int-to-boolean conversion
> >> -unop_convert("b2i", tbool, tint) # Boolean-to-int conversion
> >> -unop_convert("u2f", tunsigned, tfloat) #Unsigned-to-float
> conversion.
> >> -
> >> -unop_reduce("bany", 1, tbool, tbool) # returns ~0 if any
> component of
> >> src[0] != 0
> >> -unop_reduce("ball", 1, tbool, tbool) # returns ~0 if all
> components of
> >> src[0] != 0
> >> -unop_reduce("fany", 1, tfloat, tfloat) # returns 1.0 if any
> component of
> >> src[0] != 0
> >> -unop_reduce("fall", 1, tfloat, tfloat) # returns 1.0 if all
> components of
> >> src[0] != 0
> >> +unop("fmov", tfloat, "{src0}")
> >> +unop("imov", tint, "{src0}")
> >> +
> >> +unop("ineg", tint, "-{src0}")
> >> +unop("fneg", tfloat, "-{src0}")
> >> +unop("inot", tint, "~{src0}") # invert every bit of the integer
> >> +unop("fnot", tfloat, "({src0} == 0.0f) ? 1.0f : 0.0f")
> >> +unop("fsign", tfloat, "({src0} == 0.0f) ? 0.0f : (({src0} >
> 0.0f) ? 1.0f
> >> : -1.0f)")
> >> +unop("isign", tint, "({src0} == 0) ? 0 : ((src > 0) ? 1 : -1)")
> >> +unop("iabs", tint, "abs({src0})")
> >> +unop("fabs", tfloat, "fabsf({src0})")
> >> +unop("fsat", tfloat, "({src0} > 1.0f) ? 1.0f : (({src0} <= 0.0f)
> ? 0.0f :
> >> {src0})")
> >> +unop("frcp", tfloat, "1.0f / {src0}")
> >> +unop("frsq", tfloat, "1.0f / sqrtf({src0})")
> >> +unop("fsqrt", tfloat, "sqrtf({src0})")
> >> +unop("fexp", tfloat, "expf({src0})") # < e^x
> >> +unop("flog", tfloat, "logf({src0})") # log base e
> >> +unop("fexp2", tfloat, "exp2f({src0})")
> >> +unop("flog2", tfloat, "log2f({src0})")
> >> +unop_convert("f2i", tfloat, tint, "{src0}") # Float-to-integer
> >> conversion.
> >> +unop_convert("f2u", tfloat, tunsigned, "{src0}") # Float-to-unsigned
> >> conversion
> >> +unop_convert("i2f", tint, tfloat, "{src0}") # Integer-to-float
> >> conversion.
> >> +# Float-to-boolean conversion
> >> +unop_convert("f2b", tfloat, tbool, "{src0} == 0.0f")
> >> +# Boolean-to-float conversion
> >> +unop_convert("b2f", tbool, tfloat, "{src0} ? 1.0f : 0.0f")
> >> +# Int-to-boolean conversion
> >> +unop_convert("i2b", tint, tbool, "{src0} == 0")
> >> +unop_convert("b2i", tbool, tint, "{src0} ? 0 : -1") # Boolean-to-int
> >> conversion
> >> +unop_convert("u2f", tunsigned, tfloat, "{src0}") #Unsigned-to-float
> >> conversion.
> >> +
> >> +unop_reduce("bany", 1, tbool, tbool, "{src}", "{src0} || {src1}",
> >> "{src}")
> >> +unop_reduce("ball", 1, tbool, tbool, "{src}", "{src0} && {src1}",
> >> "{src}")
> >> +unop_reduce("fany", 1, tfloat, tfloat, "{src} != 0.0f", "{src0} ||
> >> {src1}",
> >> + "{src} ? 1.0f : 0.0f")
> >> +unop_reduce("fall", 1, tfloat, tfloat, "{src} != 0.0f", "{src0} &&
> >> {src1}",
> >> + "{src} ? 1.0f : 0.0f")
> >>
> >> # Unary floating-point rounding operations.
> >>
> >>
> >> -unop("ftrunc", tfloat)
> >> -unop("fceil", tfloat)
> >> -unop("ffloor", tfloat)
> >> -unop("ffract", tfloat)
> >> -unop("fround_even", tfloat)
> >> +unop("ftrunc", tfloat, "truncf({src0})")
> >> +unop("fceil", tfloat, "ceilf({src0})")
> >> +unop("ffloor", tfloat, "floorf({src0})")
> >> +unop("ffract", tfloat, "{src0} - floorf({src0})")
> >> +unop("fround_even", tfloat, "_mesa_round_to_even({src0})")
> >>
> >>
> >> # Trigonometric operations.
> >>
> >>
> >> -unop("fsin", tfloat)
> >> -unop("fcos", tfloat)
> >> -unop("fsin_reduced", tfloat)
> >> -unop("fcos_reduced", tfloat)
> >> +unop("fsin", tfloat, "sinf({src0})")
> >> +unop("fcos", tfloat, "cosf({src0})")
> >> +unop("fsin_reduced", tfloat, "sinf({src0})")
> >> +unop("fcos_reduced", tfloat, "cosf({src0})")
> >>
> >>
> >> # Partial derivatives.
> >>
> >>
> >> -unop("fddx", tfloat)
> >> -unop("fddy", tfloat)
> >> -unop("fddx_fine", tfloat)
> >> -unop("fddy_fine", tfloat)
> >> -unop("fddx_coarse", tfloat)
> >> -unop("fddy_coarse", tfloat)
> >> +unop("fddx", tfloat, "0.0f") # the derivative of a constant is 0.
> >> +unop("fddy", tfloat, "0.0f")
> >> +unop("fddx_fine", tfloat, "0.0f")
> >> +unop("fddy_fine", tfloat, "0.0f")
> >> +unop("fddx_coarse", tfloat, "0.0f")
> >> +unop("fddy_coarse", tfloat, "0.0f")
> >>
> >>
> >> # Floating point pack and unpack operations.
> >>
> >> -
> >> -unop_horiz("pack_snorm_2x16", 1, tunsigned, 2, tfloat)
> >> -unop_horiz("pack_snorm_4x8", 1, tunsigned, 4, tfloat)
> >> -unop_horiz("pack_unorm_2x16", 1, tunsigned, 2, tfloat)
> >> -unop_horiz("pack_unorm_4x8", 1, tunsigned, 4, tfloat)
> >> -unop_horiz("pack_half_2x16", 1, tunsigned, 2, tfloat)
> >> -unop_horiz("unpack_snorm_2x16", 2, tfloat, 1, tunsigned)
> >> -unop_horiz("unpack_snorm_4x8", 4, tfloat, 1, tunsigned)
> >> -unop_horiz("unpack_unorm_2x16", 2, tfloat, 1, tunsigned)
> >> -unop_horiz("unpack_unorm_4x8", 4, tfloat, 1, tunsigned)
> >> -unop_horiz("unpack_half_2x16", 2, tfloat, 1, tunsigned)
> >> +def pack_2x16(fmt):
> >> + unop_horiz("pack_" + fmt + "_2x16", 1, tunsigned, 2, tfloat, """
> >> +{dst.x} = (uint32_t) pack_fmt_1x16({src0.x});
> >> +{dst.x} |= ((uint32_t) pack_fmt_1x16({src0.y})) << 16;
> >> +""".replace("fmt", fmt))
> >> +
> >> +def pack_4x8(fmt):
> >> + unop_horiz("pack_" + fmt + "_4x8", 1, tunsigned, 4, tfloat, """
> >> +{dst.x} = (uint32_t) pack_fmt_1x8({src0.x});
> >> +{dst.x} |= ((uint32_t) pack_fmt_1x8({src0.y})) << 8;
> >> +{dst.x} |= ((uint32_t) pack_fmt_1x8({src0.z})) << 16;
> >> +{dst.x} |= ((uint32_t) pack_fmt_1x8({src0.w})) << 24;
> >> +""".replace("fmt", fmt))
> >> +
> >> +def unpack_2x16(fmt):
> >> + unop_horiz("unpack_" + fmt + "_2x16", 2, tfloat, 1,
> tunsigned, """
> >> +{dst.x} = unpack_fmt_1x16((uint16_t)({src0.x} & 0xffff));
> >> +{dst.y} = unpack_fmt_1x16((uint16_t)({src0.x} << 16));
> >> +""".replace("fmt", fmt))
> >> +
> >> +def unpack_4x8(fmt):
> >> + unop_horiz("unpack_" + fmt + "_4x8", 4, tfloat, 1, tunsigned, """
> >> +{dst.x} = unpack_fmt_1x8((uint8_t)({src0.x} & 0xff));
> >> +{dst.y} = unpack_fmt_1x8((uint8_t)(({src0.x} >> 8) & 0xff));
> >> +{dst.z} = unpack_fmt_1x8((uint8_t)(({src0.x} >> 16) & 0xff));
> >> +{dst.w} = unpack_fmt_1x8((uint8_t)({src0.x} >> 24));
> >> +""".replace("fmt", fmt))
> >> +
> >> +
> >> +pack_2x16("snorm")
> >> +pack_4x8("snorm")
> >> +pack_2x16("unorm")
> >> +pack_4x8("unorm")
> >> +pack_2x16("half")
> >> +unpack_2x16("snorm")
> >> +unpack_4x8("snorm")
> >> +unpack_2x16("unorm")
> >> +unpack_4x8("unorm")
> >> +unpack_2x16("half")
> >>
> >>
> >> # Lowered floating point unpacking operations.
> >>
> >>
> >> -unop_horiz("unpack_half_2x16_split_x", 1, tfloat, 1, tunsigned)
> >> -unop_horiz("unpack_half_2x16_split_y", 1, tfloat, 1, tunsigned)
> >> +unop_horiz("unpack_half_2x16_split_x", 1, tfloat, 1, tunsigned, """
> >> +{dst.x} = unpack_half_1x16((uint16_t)({src0.x} & 0xffff));
> >> +""")
> >> +unop_horiz("unpack_half_2x16_split_y", 1, tfloat, 1, tunsigned, """
> >> +{dst.y} = unpack_half_1x16((uint16_t)({src0.x} >> 16));
> >> +""")
> >>
> >>
> >> # Bit operations, part of ARB_gpu_shader5.
> >>
> >>
> >> -unop("bitfield_reverse", tunsigned)
> >> -unop("bit_count", tunsigned)
> >> -unop_convert("ufind_msb", tunsigned, tint)
> >> -unop("ifind_msb", tint)
> >> -unop("find_lsb", tint)
> >> +unop("bitfield_reverse", tunsigned, """
> >> +/* we're not winning any awards for speed here, but that's ok */
> >> +{dst} = 0;
> >> +for (unsigned bit = 0; bit < 32; bit++)
> >> + {dst} |= (({src0} >> bit) & 1) << (31 - bit);
> >> +""")
> >> +unop("bit_count", tunsigned, """
> >> +{dst} = 0;
> >> +for (unsigned bit = 0; bit < 32; bit++) {{
> >> + if (({src0} >> bit) & 1)
> >> + {dst}++;
> >> +}}
> >> +""")
> >> +
> >> +unop_convert("ufind_msb", tunsigned, tint, """
> >> +{dst} = -1;
> >> +for (int bit = 31; bit > 0; bit--) {{
> >> + if (({src0} >> bit) & 1) {{
> >> + {dst} = bit;
> >> + break;
> >> + }}
> >> +}}
> >> +""")
> >> +
> >> +unop("ifind_msb", tint, """
> >> +{dst} = -1;
> >> +for (int bit = 31; bit >= 0; bit--) {{
> >> + /* If src0 < 0, we're looking for the first 0 bit.
> >> + * if src0 >= 0, we're looking for the first 1 bit.
> >> + */
> >> + if (((({src0} >> bit) & 1) && ({src0} >= 0)) ||
> >> + (!(({src0} >> bit) & 1) && ({src0} < 0))) {{
> >> + {dst} = bit;
> >> + break;
> >> + }}
> >> +}}
> >> +""")
> >> +
> >> +unop("find_lsb", tint, """
> >> +{dst} = -1;
> >> +for (unsigned bit = 0; bit < 32; bit++) {{
> >> + if (({src0} >> bit) & 1) {{
> >> + {dst} = bit;
> >> + break;
> >> + }}
> >> +}}
> >> +""")
> >
> > We do have helpers for most of the above. I was moving them onto
> util but
> > got sidetracked. I should rework those patches.
>
> Sure, and while we're at it we can remove the hand-written versions in
> the GLSL IR constant folding code as well.
>
> >
> >>
> >>
> >> for i in range(1, 5):
> >> for j in range(1, 5):
> >> - unop_horiz("fnoise" + str(i) + "_" + str(j), i, tfloat, j,
> tfloat)
> >> + unop_horiz("fnoise" + str(i) + "_" + str(j), i, tfloat, j,
> tfloat,
> >> + "0.0f")
> >>
> >> -def binop_convert(name, out_type, in_type, alg_props):
> >> - opcode(name, 0, out_type, [0, 0], [in_type, in_type], alg_props)
> >> +def binop_convert(name, out_type, in_type, alg_props, const_expr):
> >> + opcode(name, 0, out_type, [0, 0], [in_type, in_type], alg_props,
> >> const_expr)
> >>
> >> -def binop(name, ty, alg_props):
> >> - binop_convert(name, ty, ty, alg_props)
> >> +def binop(name, ty, alg_props, const_expr):
> >> + binop_convert(name, ty, ty, alg_props, const_expr)
> >>
> >> -def binop_compare(name, ty, alg_props):
> >> - binop_convert(name, ty, tbool, alg_props)
> >> +def binop_compare(name, ty, alg_props, const_expr):
> >> + binop_convert(name, tbool, ty, alg_props, const_expr)
> >>
> >> def binop_horiz(name, out_size, out_type, src1_size, src1_type,
> >> src2_size,
> >> - src2_type):
> >> - opcode(name, out_size, out_type, [src1_size, src2_size],
> [src1_type,
> >> src2_type], "")
> >> -
> >> -def binop_reduce(name, output_size, output_type, src_type):
> >> - opcode(name + "2",output_size, output_type,
> >> - [2, 2], [src_type, src_type], commutative)
> >> + src2_type, const_expr):
> >> + opcode(name, out_size, out_type, [src1_size, src2_size],
> [src1_type,
> >> src2_type],
> >> + "", const_expr)
> >> +
> >> +def binop_reduce(name, output_size, output_type, src_type,
> >> prereduce_expr,
> >> + reduce_expr, final_expr):
> >> + def final(src, expr=final_expr):
> >> + return expr.format(src= "(" + src + ")")
> >> + def reduce_(src0, src1, expr=reduce_expr):
> >> + return expr.format(src0=src0, src1=src1)
> >> + def prereduce(src0, src1, expr=prereduce_expr):
> >> + return "(" + expr.format(src0=src0, src1=src1) + ")"
> >> + src0 = prereduce("{src0.x}", "{src1.x}")
> >> + src1 = prereduce("{src0.y}", "{src1.y}")
> >> + src2 = prereduce("{src0.z}", "{src1.z}")
> >> + src3 = prereduce("{src0.w}", "{src1.w}")
> >> + opcode(name + "2", output_size, output_type,
> >> + [2, 2], [src_type, src_type], commutative,
> >> + final(reduce_(src0, src1)))
> >> opcode(name + "3", output_size, output_type,
> >> - [3, 3], [src_type, src_type], commutative)
> >> + [3, 3], [src_type, src_type], commutative,
> >> + final(reduce_(reduce_(src0, src1), src2)))
> >> opcode(name + "4", output_size, output_type,
> >> - [4, 4], [src_type, src_type], commutative)
> >> + [4, 4], [src_type, src_type], commutative,
> >> + final(reduce_(reduce_(src0, src1), reduce_(src2, src3))))
> >>
> >> -binop("fadd", tfloat, commutative + associative)
> >> -binop("iadd", tint, commutative + associative)
> >> -binop("fsub", tfloat, "")
> >> -binop("isub", tint, "")
> >> +binop("fadd", tfloat, commutative + associative, "{src0} + {src1}")
> >> +binop("iadd", tint, commutative + associative, "{src0} + {src1}")
> >> +binop("fsub", tfloat, "", "{src0} - {src1}")
> >> +binop("isub", tint, "", "{src0} - {src1}")
> >>
> >> -binop("fmul", tfloat, commutative + associative)
> >> +binop("fmul", tfloat, commutative + associative, "{src0} * {src1}")
> >> # low 32-bits of signed/unsigned integer multiply
> >> -binop("imul", tint, commutative + associative)
> >> +binop("imul", tint, commutative + associative, "{src0} * {src1}")
> >> # high 32-bits of signed integer multiply
> >> -binop("imul_high", tint, commutative)
> >> +binop("imul_high", tint, commutative,
> >> + "(int32_t)(((int64_t) {src0} * (int64_t) {src1}) >> 32)")
> >> # high 32-bits of unsigned integer multiply
> >> -binop("umul_high", tunsigned, commutative)
> >> +binop("umul_high", tunsigned, commutative,
> >> + "(uint32_t)(((uint64_t) {src0} * (uint64_t) {src1}) >> 32)")
> >>
> >> -binop("fdiv", tfloat, "")
> >> -binop("idiv", tint, "")
> >> -binop("udiv", tunsigned, "")
> >> +binop("fdiv", tfloat, "", "{src0} / {src1}")
> >> +binop("idiv", tint, "", "{src0} / {src1}")
> >> +binop("udiv", tunsigned, "", "{src0} / {src1}")
> >>
> >> # returns a boolean representing the carry resulting from the
> addition of
> >> # the two unsigned arguments.
> >>
> >> -binop_convert("uadd_carry", tbool, tunsigned,
> >> - commutative)
> >> +binop_convert("uadd_carry", tbool, tunsigned, commutative, "{src0} +
> >> {src1} < {src0}")
> >>
> >> # returns a boolean representing the borrow resulting from the
> >> subtraction
> >> # of the two unsigned arguments.
> >>
> >> -binop_convert("usub_borrow", tbool, tunsigned, "")
> >> +binop_convert("usub_borrow", tbool, tunsigned, "", "{src1} <
> {src0}")
> >>
> >> -binop("fmod", tfloat, "")
> >> -binop("umod", tunsigned, "")
> >> +binop("fmod", tfloat, "", "{src0} - {src1} * floorf({src0} /
> {src1})")
> >> +binop("umod", tunsigned, "", "{src1} == 0 ? 0 : {src0} % {src1}")
> >>
> >> #
> >> # Comparisons
> >> @@ -250,41 +365,47 @@ binop("umod", tunsigned, "")
> >>
> >> # these integer-aware comparisons return a boolean (0 or ~0)
> >>
> >> -binop_compare("flt", tfloat, "")
> >> -binop_compare("fge", tfloat, "")
> >> -binop_compare("feq", tfloat, commutative)
> >> -binop_compare("fne", tfloat, commutative)
> >> -binop_compare("ilt", tint, "")
> >> -binop_compare("ige", tint, "")
> >> -binop_compare("ieq", tint, commutative)
> >> -binop_compare("ine", tint, commutative)
> >> -binop_compare("ult", tunsigned, "")
> >> -binop_compare("uge", tunsigned, "")
> >> +binop_compare("flt", tfloat, "", "{src0} < {src1}")
> >> +binop_compare("fge", tfloat, "", "{src0} >= {src1}")
> >> +binop_compare("feq", tfloat, commutative, "{src0} == {src1}")
> >> +binop_compare("fne", tfloat, commutative, "{src0} != {src1}")
> >> +binop_compare("ilt", tint, "", "{src0} < {src1}")
> >> +binop_compare("ige", tint, "", "{src0} >= {src1}")
> >> +binop_compare("ieq", tint, commutative, "{src0} == {src1}")
> >> +binop_compare("ine", tint, commutative, "{src0} != {src1}")
> >> +binop_compare("ult", tunsigned, "", "{src0} < {src1}")
> >> +binop_compare("uge", tunsigned, "", "{src0} >= {src1}")
> >>
> >> # integer-aware GLSL-style comparisons that compare floats and ints
> >>
> >> -binop_reduce("ball_fequal", 1, tbool, tfloat)
> >> -binop_reduce("bany_fnequal", 1, tbool, tfloat)
> >> -binop_reduce("ball_iequal", 1, tbool, tint)
> >> -binop_reduce("bany_inequal", 1, tbool, tint)
> >> +binop_reduce("ball_fequal", 1, tbool, tfloat, "{src0} == {src1}",
> >> + "{src0} && {src1}", "{src}")
> >> +binop_reduce("bany_fnequal", 1, tbool, tfloat, "{src0} != {src1}",
> >> + "{src0} || {src1}", "{src}")
> >> +binop_reduce("ball_iequal", 1, tbool, tint, "{src0} == {src0}",
> >> + "{src0} && {src1}", "{src}")
> >> +binop_reduce("bany_inequal", 1, tbool, tint, "{src0} != {src1}",
> >> + "{src0} || {src1}", "{src}")
> >>
> >> # non-integer-aware GLSL-style comparisons that return 0.0 or 1.0
> >>
> >> -binop_reduce("fall_equal", 1, tfloat, tfloat)
> >> -binop_reduce("fany_nequal", 1, tfloat, tfloat)
> >> +binop_reduce("fall_equal", 1, tfloat, tfloat, "{src0} == {src1}",
> >> + "{src0} && {src1}", "{src} ? 1.0f : 0.0f")
> >> +binop_reduce("fany_nequal", 1, tfloat, tfloat, "{src0} != {src1}",
> >> + "{src0} || {src1}", "{src} ? 1.0f : 0.0f")
> >>
> >> # These comparisons for integer-less hardware return 1.0 and 0.0
> for true
> >> # and false respectively
> >>
> >> -binop("slt", tfloat, "") # Set on Less Than
> >> -binop("sge", tfloat, "") # Set on Greater Than or Equal
> >> -binop("seq", tfloat, commutative) # Set on Equal
> >> -binop("sne", tfloat, commutative) # Set on Not Equal
> >> +binop("slt", tfloat, "", "({src0} < {src1}) ? 1.0f : 0.0f") #
> Set on Less
> >> Than
> >> +binop("sge", tfloat, "", "({src0} >= {src1}) ? 1.0f : 0.0f") #
> Set on
> >> Greater or Equal
> >> +binop("seq", tfloat, commutative, "({src0} == {src1}) ? 1.0f :
> 0.0f") #
> >> Set on Equal
> >> +binop("sne", tfloat, commutative, "({src0} != {src1}) ? 1.0f :
> 0.0f") #
> >> Set on Not Equal
> >>
> >>
> >> -binop("ishl", tint, "")
> >> -binop("ishr", tint, "")
> >> -binop("ushr", tunsigned, "")
> >> +binop("ishl", tint, "", "{src0} << {src1}")
> >> +binop("ishr", tint, "", "{src0} >> {src1}")
> >> +binop("ushr", tunsigned, "", "{src0} >> {src1}")
> >>
> >> # bitwise logic operators
> >> #
> >> @@ -292,9 +413,9 @@ binop("ushr", tunsigned, "")
> >> # integers.
> >>
> >>
> >> -binop("iand", tunsigned, commutative + associative)
> >> -binop("ior", tunsigned, commutative + associative)
> >> -binop("ixor", tunsigned, commutative + associative)
> >> +binop("iand", tunsigned, commutative + associative, "{src0} &
> {src1}")
> >> +binop("ior", tunsigned, commutative + associative, "{src0} |
> {src1}")
> >> +binop("ixor", tunsigned, commutative + associative, "{src0} ^
> {src1}")
> >>
> >>
> >> # floating point logic operators
> >> @@ -302,42 +423,60 @@ binop("ixor", tunsigned, commutative +
> associative)
> >> # These use (src != 0.0) for testing the truth of the input, and
> output
> >> 1.0
> >> # for true and 0.0 for false
> >>
> >> -binop("fand", tfloat, commutative)
> >> -binop("for", tfloat, commutative)
> >> -binop("fxor", tfloat, commutative)
> >> -
> >> -binop_reduce("fdot", 1, tfloat, tfloat)
> >> -
> >> -binop("fmin", tfloat, commutative + associative)
> >> -binop("imin", tint, commutative + associative)
> >> -binop("umin", tunsigned, commutative + associative)
> >> -binop("fmax", tfloat, commutative + associative)
> >> -binop("imax", tint, commutative + associative)
> >> -binop("umax", tunsigned, commutative + associative)
> >> -
> >> -binop("fpow", tfloat, "")
> >> -
> >> -binop_horiz("pack_half_2x16_split", 1, tunsigned, 1, tfloat, 1,
> tfloat)
> >> -
> >> -binop("bfm", tunsigned, "")
> >> -
> >> -binop("ldexp", tunsigned, "")
> >> +binop("fand", tfloat, commutative,
> >> + "(({src0} != 0.0f) && ({src1} != 0.0f)) ? 1.0f : 0.0f")
> >> +binop("for", tfloat, commutative,
> >> + "(({src0} != 0.0f) || ({src1} != 0.0f)) ? 1.0f : 0.0f")
> >> +binop("fxor", tfloat, commutative,
> >> + "({src0} != 0.0f && {src1} == 0.0f) || ({src0} == 0.0f &&
> {src1} !=
> >> 0.0f) ? 1.0f : 0.0f")
> >> +
> >> +binop_reduce("fdot", 1, tfloat, tfloat, "{src0} * {src1}", "{src0} +
> >> {src1}",
> >> + "{src}")
> >> +
> >> +binop("fmin", tfloat, commutative + associative, "fminf({src0},
> {src1})")
> >> +binop("imin", tint, commutative + associative, "{src1} > {src0}
> ? {src0}
> >> : {src1}")
> >> +binop("umin", tunsigned, commutative + associative, "{src1} >
> {src0} ?
> >> {src0} : {src1}")
> >> +binop("fmax", tfloat, commutative + associative, "fmaxf({src0},
> {src1})")
> >> +binop("imax", tint, commutative + associative, "{src1} > {src0}
> ? {src1}
> >> : {src0}")
> >> +binop("umax", tunsigned, commutative + associative, "{src1} >
> {src0} ?
> >> {src1} : {src0}")
> >> +
> >> +binop("fpow", tfloat, "", "powf({src0}, {src1})")
> >> +
> >> +binop_horiz("pack_half_2x16_split", 1, tunsigned, 1, tfloat, 1,
> tfloat,
> >> + "pack_half_1x16({src0.x}) | (pack_half_1x16({src1.x}) <<
> >> 16)")
> >> +
> >> +binop_convert("bfm", tunsigned, tint, "", """
> >> +int offset = {src0}, bits = {src1};
> >> +if (offset < 0 || bits < 0 || offset + bits > 32)
> >> + {dst} = 0; /* undefined per the spec */
> >> +else
> >> + {dst} = ((1 << bits)- 1) << offset;
> >> +""")
> >> +
> >> +opcode("ldexp", 0, tunsigned, [0, 0], [tfloat, tint], "", """
> >> +{dst} = ldexp({src0}, {src1});
> >> +/* flush denormals to zero. */
> >> +if (!isnormal({dst}))
> >> + {dst} = copysign(0.0f, {src0});
> >> +""")
> >>
> >> # Combines the first component of each input to make a 2-component
> >> vector.
> >>
> >> -binop_horiz("vec2", 2, tunsigned, 1, tunsigned, 1, tunsigned)
> >> +binop_horiz("vec2", 2, tunsigned, 1, tunsigned, 1, tunsigned, """
> >> +{dst.x} = {src0.x};
> >> +{dst.y} = {src1.x};
> >> +""")
> >>
> >> -def triop(name, ty):
> >> - opcode(name, 0, ty, [0, 0, 0], [ty, ty, ty], "")
> >> -def triop_horiz(name, output_size, src1_size, src2_size, src3_size):
> >> +def triop(name, ty, const_expr):
> >> + opcode(name, 0, ty, [0, 0, 0], [ty, ty, ty], "", const_expr)
> >> +def triop_horiz(name, output_size, src1_size, src2_size, src3_size,
> >> const_expr):
> >> opcode(name, output_size, tunsigned,
> >> [src1_size, src2_size, src3_size],
> >> - [tunsigned, tunsigned, tunsigned], "")
> >> + [tunsigned, tunsigned, tunsigned], "", const_expr)
> >>
> >> -# fma(a, b, c) = (a# b) + c
> >> -triop("ffma", tfloat)
> >> +triop("ffma", tfloat, "{src0} * {src1} + {src2}")
> >>
> >> -triop("flrp", tfloat)
> >> +triop("flrp", tfloat, "{src0} * (1 - {src2}) + {src1} * {src2}")
> >>
> >> # Conditional Select
> >> #
> >> @@ -346,32 +485,83 @@ triop("flrp", tfloat)
> >> # bools (0.0 vs 1.0) and one for integer bools (0 vs ~0).
> >>
> >>
> >> -triop("fcsel", tfloat)
> >> +triop("fcsel", tfloat, "({src0} != 0.0f) ? {src1} : {src2}")
> >> opcode("bcsel", 0, tunsigned, [0, 0, 0],
> >> - [tbool, tunsigned, tunsigned], "")
> >> -
> >> -triop("bfi", tunsigned)
> >> -
> >> -triop("ubitfield_extract", tunsigned)
> >> -opcode("ibitfield_extract", 0, tint, [0, 0, 0],
> >> - [tint, tunsigned, tunsigned], "")
> >> + [tbool, tunsigned, tunsigned], "", "{src0} ? {src1} : {src2}")
> >> +
> >> +triop("bfi", tunsigned, """
> >> +unsigned mask = {src0}, insert = {src1} & mask, base = {src2};
> >> +if (mask == 0) {{
> >> + {dst} = base;
> >> +}} else {{
> >> + unsigned tmp = mask;
> >> + while (!(tmp & 1)) {{
> >> + tmp >>= 1;
> >> + insert <<= 1;
> >> + }}
> >> + {dst} = (base & ~mask) | insert;
> >> +}}
> >> +""")
> >> +
> >> +opcode("ubitfield_extract", 0, tunsigned,
> >> + [0, 1, 1], [tunsigned, tint, tint], "", """
> >> +unsigned base = {src0};
> >> +int offset = {src1.x}, bits = {src2.x};
> >> +if (bits == 0) {{
> >> + {dst} = 0;
> >> +}} else if (bits < 0 || offset < 0 || offset + bits > 32) {{
> >> + {dst} = 0; /* undefined per the spec */
> >> +}} else {{
> >> + {dst} = (base >> offset) & ((1 << bits) - 1);
> >> +}}
> >> +""")
> >> +opcode("ibitfield_extract", 0, tint,
> >> + [0, 1, 1], [tint, tint, tint], "", """
> >> +int base = {src0};
> >> +int offset = {src1.x}, bits = {src2.x};
> >> +if (bits == 0) {{
> >> + {dst} = 0;
> >> +}} else if (offset < 0 || bits < 0 || offset + bits > 32) {{
> >> + {dst} = 0;
> >> +}} else {{
> >> + {dst} = (base << (32 - offset - bits)) >> offset; /* use
> >> sign-extending shift */
> >> +}}
> >> +""")
> >>
> >> # Combines the first component of each input to make a 3-component
> >> vector.
> >>
> >> -triop_horiz("vec3", 3, 1, 1, 1)
> >> +triop_horiz("vec3", 3, 1, 1, 1, """
> >> +{dst.x} = {src0.x};
> >> +{dst.y} = {src1.x};
> >> +{dst.z} = {src2.x};
> >> +""")
> >>
> >> -def quadop(name):
> >> - opcode(name, 0, tunsigned, [0, 0, 0, 0],
> >> - [tunsigned, tunsigned, tunsigned, tunsigned],
> >> - "")
> >> -def quadop_horiz(name, output_size, src1_size, src2_size, src3_size,
> >> src4_size):
> >> +def quadop_horiz(name, output_size, src1_size, src2_size, src3_size,
> >> + src4_size, const_expr):
> >> opcode(name, output_size, tunsigned,
> >> [src1_size, src2_size, src3_size, src4_size],
> >> [tunsigned, tunsigned, tunsigned, tunsigned],
> >> - "")
> >> -
> >> -quadop("bitfield_insert")
> >> -
> >> -quadop_horiz("vec4", 4, 1, 1, 1, 1)
> >> + "", const_expr)
> >> +
> >> +opcode("bitfield_insert", 0, tunsigned, [0, 0, 1, 1],
> >> + [tunsigned, tunsigned, tint, tint], "", """
> >> +unsigned base = {src0}, insert = {src1};
> >> +int offset = {src2.x}, bits = {src3.x};
> >> +if (bits == 0) {{
> >> + {dst} = 0;
> >> +}} else if (offset < 0 || bits < 0 || bits + offset > 32) {{
> >> + {dst} = 0;
> >> +}} else {{
> >> + unsigned mask = ((1 << bits) - 1) << offset;
> >> + {dst} = (base & ~mask) | ((insert << bits) & mask);
> >> +}}
> >> +""")
> >> +
> >> +quadop_horiz("vec4", 4, 1, 1, 1, 1, """
> >> +{dst.x} = {src0.x};
> >> +{dst.y} = {src1.x};
> >> +{dst.z} = {src2.x};
> >> +{dst.w} = {src3.x};
> >> +""")
> >>
> >>
> >> --
> >> 2.1.0
> >>
> >> _______________________________________________
> >> mesa-dev mailing list
> >> mesa-dev at lists.freedesktop.org
> <mailto:mesa-dev at lists.freedesktop.org>
> >> http://lists.freedesktop.org/mailman/listinfo/mesa-dev
>
>
>
>
> _______________________________________________
> mesa-dev mailing list
> mesa-dev at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/mesa-dev
>
There's something strange here, I'm seeing this producing weird code
with Mesa I pulled from master. See this for example:
src/glsl/nir/nir_constant_expressions.c:
---
static nir_const_value
evaluate_unpack_half_2x16_split_y(unsigned num_components,
nir_const_value *_src)
{
nir_const_value _dst_val = { { {0, 0, 0, 0} } };
struct unsigned_vec src0 = {
_src[0].u[0],
};
struct float_vec dst;
dst.y = unpack_half_1x16((uint16_t)(src0.x >> 16));
_dst_val.f[0] = dst.x;
return _dst_val;
}
---
dst.y is written and dst.x is read. Did this work for you when you ran it?
/Juha-Pekka
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