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nir: Make boolean conversions sized just like the others

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Instead of a single i2b and b2i, we now have i2b32 and b2iN where N is
one if 8, 16, 32, or 64.  This leads to having a few more opcodes but
now everything is consistent and booleans aren't a weird special case
anymore.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
This commit is contained in:
Jason Ekstrand
2018-11-07 13:43:40 -06:00
parent be98b1db38
commit dca6cd9ce6
20 changed files with 121 additions and 74 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
src/compiler/glsl/glsl_to_nir.cpp
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@@ -1527,7 +1527,7 @@ nir_visitor::visit(ir_expression *ir)
result = supports_ints ? nir_u2f32(&b, srcs[0]) : nir_fmov(&b, srcs[0]);
break;
case ir_unop_b2f:
result = supports_ints ? nir_b2f(&b, srcs[0]) : nir_fmov(&b, srcs[0]);
result = supports_ints ? nir_b2f32(&b, srcs[0]) : nir_fmov(&b, srcs[0]);
break;
case ir_unop_f2i:
case ir_unop_f2u:

4
src/compiler/nir/nir.h
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@@ -1568,8 +1568,8 @@ nir_alu_instr_is_comparison(const nir_alu_instr *instr)
case nir_op_uge:
case nir_op_ieq:
case nir_op_ine:
case nir_op_i2b:
case nir_op_f2b:
case nir_op_i2b32:
case nir_op_f2b32:
case nir_op_inot:
case nir_op_fnot:
return true;

4
src/compiler/nir/nir_algebraic.py
View File

@@ -45,6 +45,10 @@ conv_opcode_types = {
'f2i' : 'int',
'u2u' : 'uint',
'i2i' : 'int',
'b2f' : 'float',
'b2i' : 'int',
'i2b' : 'bool',
'f2b' : 'bool',
}
if sys.version_info < (3, 0):

12
src/compiler/nir/nir_builder.h
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@@ -963,6 +963,18 @@ nir_load_param(nir_builder *build, uint32_t param_idx)
#include "nir_builder_opcodes.h"
static inline nir_ssa_def *
nir_f2b(nir_builder *build, nir_ssa_def *f)
{
return nir_f2b32(build, f);
}
static inline nir_ssa_def *
nir_i2b(nir_builder *build, nir_ssa_def *i)
{
return nir_i2b32(build, i);
}
static inline nir_ssa_def *
nir_load_barycentric(nir_builder *build, nir_intrinsic_op op,
unsigned interp_mode)

2
src/compiler/nir/nir_lower_idiv.c
View File

@@ -95,7 +95,7 @@ convert_instr(nir_builder *bld, nir_alu_instr *alu)
r = nir_isub(bld, a, r);
r = nir_uge(bld, r, b);
r = nir_b2i(bld, r);
r = nir_b2i32(bld, r);
q = nir_iadd(bld, q, r);
if (is_signed) {

2
src/compiler/nir/nir_lower_int64.c
View File

@@ -48,7 +48,7 @@ lower_isign64(nir_builder *b, nir_ssa_def *x)
nir_ssa_def *is_non_zero = nir_i2b(b, nir_ior(b, x_lo, x_hi));
nir_ssa_def *res_hi = nir_ishr(b, x_hi, nir_imm_int(b, 31));
nir_ssa_def *res_lo = nir_ior(b, res_hi, nir_b2i(b, is_non_zero));
nir_ssa_def *res_lo = nir_ior(b, res_hi, nir_b2i32(b, is_non_zero));
return nir_pack_64_2x32_split(b, res_lo, res_hi);
}

25
src/compiler/nir/nir_opcodes.py
View File

@@ -90,6 +90,7 @@ class Opcode(object):
# helper variables for strings
tfloat = "float"
tint = "int"
tbool = "bool"
tbool32 = "bool32"
tuint = "uint"
tuint16 = "uint16"
@@ -117,6 +118,8 @@ def type_size(type_):
def type_sizes(type_):
if type_has_size(type_):
return [type_size(type_)]
elif type_ == 'bool':
return [32]
elif type_ == 'float':
return [16, 32, 64]
else:
@@ -196,11 +199,15 @@ unop("fexp2", tfloat, "exp2f(src0)")
unop("flog2", tfloat, "log2f(src0)")
# Generate all of the numeric conversion opcodes
for src_t in [tint, tuint, tfloat]:
if src_t in (tint, tuint):
dst_types = [tfloat, src_t]
for src_t in [tint, tuint, tfloat, tbool]:
if src_t == tbool:
dst_types = [tfloat, tint]
elif src_t == tint:
dst_types = [tfloat, tint, tbool]
elif src_t == tuint:
dst_types = [tfloat, tuint]
elif src_t == tfloat:
dst_types = [tint, tuint, tfloat]
dst_types = [tint, tuint, tfloat, tbool]
for dst_t in dst_types:
for bit_size in type_sizes(dst_t):
@@ -211,15 +218,9 @@ for src_t in [tint, tuint, tfloat]:
bit_size, rnd_mode),
dst_t + str(bit_size), src_t, "src0")
else:
conv_expr = "src0 != 0" if dst_t == tbool else "src0"
unop_convert("{0}2{1}{2}".format(src_t[0], dst_t[0], bit_size),
dst_t + str(bit_size), src_t, "src0")
# We'll hand-code the to/from bool conversion opcodes. Because bool doesn't
# have multiple bit-sizes, we can always infer the size from the other type.
unop_convert("f2b", tbool32, tfloat, "src0 != 0.0")
unop_convert("i2b", tbool32, tint, "src0 != 0")
unop_convert("b2f", tfloat, tbool32, "src0 ? 1.0 : 0.0")
unop_convert("b2i", tint, tbool32, "src0 ? 1 : 0")
dst_t + str(bit_size), src_t, conv_expr)
# Unary floating-point rounding operations.

30
src/compiler/nir/nir_opcodes_c.py
View File

@@ -41,6 +41,8 @@ nir_type_conversion_op(nir_alu_type src, nir_alu_type dst, nir_rounding_mode rnd
if (src == dst && src_base == nir_type_float) {
return nir_op_fmov;
} else if (src == dst && src_base == nir_type_bool) {
return nir_op_imov;
} else if ((src_base == nir_type_int || src_base == nir_type_uint) &&
(dst_base == nir_type_int || dst_base == nir_type_uint) &&
src_bit_size == dst_bit_size) {
@@ -51,10 +53,10 @@ nir_type_conversion_op(nir_alu_type src, nir_alu_type dst, nir_rounding_mode rnd
}
switch (src_base) {
% for src_t in ['int', 'uint', 'float']:
% for src_t in ['int', 'uint', 'float', 'bool']:
case nir_type_${src_t}:
switch (dst_base) {
% for dst_t in ['int', 'uint', 'float']:
% for dst_t in ['int', 'uint', 'float', 'bool']:
case nir_type_${dst_t}:
% if src_t in ['int', 'uint'] and dst_t in ['int', 'uint']:
% if dst_t == 'int':
@@ -62,6 +64,14 @@ nir_type_conversion_op(nir_alu_type src, nir_alu_type dst, nir_rounding_mode rnd
% else:
<% dst_t = src_t %>
% endif
% elif src_t == 'bool' and dst_t in ['int', 'uint', 'bool']:
% if dst_t == 'int':
<% continue %>
% else:
<% dst_t = 'int' %>
% endif
% elif src_t == 'uint' and dst_t == 'bool':
<% src_t = 'int' %>
% endif
switch (dst_bit_size) {
% for dst_bits in type_sizes(dst_t):
@@ -85,26 +95,10 @@ nir_type_conversion_op(nir_alu_type src, nir_alu_type dst, nir_rounding_mode rnd
unreachable("Invalid nir alu bit size");
}
% endfor
case nir_type_bool:
% if src_t == 'float':
return nir_op_f2b;
% else:
return nir_op_i2b;
% endif
default:
unreachable("Invalid nir alu base type");
}
% endfor
case nir_type_bool:
switch (dst_base) {
case nir_type_int:
case nir_type_uint:
return nir_op_b2i;
case nir_type_float:
return nir_op_b2f;
default:
unreachable("Invalid nir alu base type");
}
default:
unreachable("Invalid nir alu base type");
}

14
src/compiler/nir/nir_opt_algebraic.py
View File

@@ -440,7 +440,7 @@ optimizations = [
(('fsat', ('fadd', ('b2f', 'a@32'), ('b2f', 'b@32'))), ('b2f', ('ior', a, b))),
(('iand', 'a@bool', 1.0), ('b2f', a), '!options->lower_b2f'),
# True/False are ~0 and 0 in NIR. b2i of True is 1, and -1 is ~0 (True).
(('ineg', ('b2i@32', 'a@32')), a),
(('ineg', ('b2i32', 'a@32')), a),
(('flt', ('fneg', ('b2f', 'a@32')), 0), a), # Generated by TGSI KILL_IF.
(('flt', ('fsub', 0.0, ('b2f', 'a@32')), 0), a), # Generated by TGSI KILL_IF.
# Comparison with the same args. Note that these are not done for
@@ -532,15 +532,15 @@ optimizations = [
(('fcsel', a, b, b), b),
# Conversions
(('i2b', ('b2i', 'a@32')), a),
(('i2b', 'a@bool'), a),
(('i2b32', ('b2i', 'a@32')), a),
(('i2b32', 'a@bool'), a),
(('f2i', ('ftrunc', a)), ('f2i', a)),
(('f2u', ('ftrunc', a)), ('f2u', a)),
(('i2b', ('ineg', a)), ('i2b', a)),
(('i2b', ('iabs', a)), ('i2b', a)),
(('fabs', ('b2f', a)), ('b2f', a)),
(('iabs', ('b2i', a)), ('b2i', a)),
(('inot', ('f2b', a)), ('feq', a, 0.0)),
(('inot', ('f2b32', a)), ('feq', a, 0.0)),
# Ironically, mark these as imprecise because removing the conversions may
# preserve more precision than doing the conversions (e.g.,
@@ -754,8 +754,8 @@ for left, right in itertools.combinations_with_replacement(invert.keys(), 2):
('ior', (invert[left], a, b), (invert[right], c, d))))
# Optimize x2yN(b2x(x)) -> b2y
optimizations.append((('f2b', ('b2f', 'a@32')), a))
optimizations.append((('i2b', ('b2i', 'a@32')), a))
optimizations.append((('f2b32', ('b2f', 'a@32')), a))
optimizations.append((('i2b32', ('b2i', 'a@32')), a))
for x, y in itertools.product(['f', 'u', 'i'], ['f', 'u', 'i']):
if x != 'f' and y != 'f' and x != y:
continue
@@ -916,7 +916,7 @@ late_optimizations = [
(('fmax', ('fadd(is_used_once)', '#c', a), ('fadd(is_used_once)', '#c', b)), ('fadd', c, ('fmax', a, b))),
# Lowered for backends without a dedicated b2f instruction
(('b2f@32', 'a@32'), ('iand', a, 1.0), 'options->lower_b2f'),
(('b2f32', 'a@32'), ('iand', a, 1.0), 'options->lower_b2f'),
]
print(nir_algebraic.AlgebraicPass("nir_opt_algebraic", optimizations).render())

2
src/compiler/nir/nir_opt_if.c
View File

@@ -509,7 +509,7 @@ can_propagate_through_alu(nir_src *src)
case nir_op_ior:
case nir_op_iand:
case nir_op_inot:
case nir_op_b2i:
case nir_op_b2i32:
return true;
case nir_op_bcsel:
return src == &alu->src[0].src;

19
src/compiler/nir/nir_search.c
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@@ -108,6 +108,10 @@ nir_op_matches_search_op(nir_op nop, uint16_t sop)
nop == nir_op_##op##32 || \
nop == nir_op_##op##64;
#define MATCH_BCONV_CASE(op) \
case nir_search_op_##op: \
return nop == nir_op_##op##32;
switch (sop) {
MATCH_FCONV_CASE(i2f)
MATCH_FCONV_CASE(u2f)
@@ -116,6 +120,10 @@ nir_op_matches_search_op(nir_op nop, uint16_t sop)
MATCH_ICONV_CASE(f2i)
MATCH_ICONV_CASE(u2u)
MATCH_ICONV_CASE(i2i)
MATCH_FCONV_CASE(b2f)
MATCH_ICONV_CASE(b2i)
MATCH_BCONV_CASE(i2b)
MATCH_BCONV_CASE(f2b)
default:
unreachable("Invalid nir_search_op");
}
@@ -149,6 +157,13 @@ nir_op_for_search_op(uint16_t sop, unsigned bit_size)
default: unreachable("Invalid bit size"); \
}
#define RET_BCONV_CASE(op) \
case nir_search_op_##op: \
switch (bit_size) { \
case 32: return nir_op_##op##32; \
default: unreachable("Invalid bit size"); \
}
switch (sop) {
RET_FCONV_CASE(i2f)
RET_FCONV_CASE(u2f)
@@ -157,6 +172,10 @@ nir_op_for_search_op(uint16_t sop, unsigned bit_size)
RET_ICONV_CASE(f2i)
RET_ICONV_CASE(u2u)
RET_ICONV_CASE(i2i)
RET_FCONV_CASE(b2f)
RET_ICONV_CASE(b2i)
RET_BCONV_CASE(i2b)
RET_BCONV_CASE(f2b)
default:
unreachable("Invalid nir_search_op");
}

4
src/compiler/nir/nir_search.h
View File

@@ -117,6 +117,10 @@ enum nir_search_op {
nir_search_op_f2i,
nir_search_op_u2u,
nir_search_op_i2i,
nir_search_op_b2f,
nir_search_op_b2i,
nir_search_op_i2b,
nir_search_op_f2b,
};
typedef struct {

4
src/compiler/spirv/vtn_glsl450.c
View File

@@ -274,7 +274,7 @@ build_atan(nir_builder *b, nir_ssa_def *y_over_x)
/* range-reduction fixup */
tmp = nir_fadd(b, tmp,
nir_fmul(b,
nir_b2f(b, nir_flt(b, one, abs_y_over_x)),
nir_b2f32(b, nir_flt(b, one, abs_y_over_x)),
nir_fadd(b, nir_fmul(b, tmp,
nir_imm_float(b, -2.0f)),
nir_imm_float(b, M_PI_2f))));
@@ -346,7 +346,7 @@ build_atan2(nir_builder *b, nir_ssa_def *y, nir_ssa_def *x)
/* Calculate the arctangent and fix up the result if we had flipped the
* coordinate system.
*/
nir_ssa_def *arc = nir_fadd(b, nir_fmul(b, nir_b2f(b, flip),
nir_ssa_def *arc = nir_fadd(b, nir_fmul(b, nir_b2f32(b, flip),
nir_imm_float(b, M_PI_2f)),
build_atan(b, tan));