[Mesa-dev] [PATCH 04/50] glsl: Add "built-in" functions to do eq(fp64, fp64)
Dave Airlie
airlied at gmail.com
Tue Mar 13 04:24:29 UTC 2018
From: Elie Tournier <tournier.elie at gmail.com>
Signed-off-by: Elie Tournier <elie.tournier at collabora.com>
---
src/compiler/glsl/builtin_float64.h | 104 ++++++++++++++++++++++++++++++++
src/compiler/glsl/builtin_functions.cpp | 4 ++
src/compiler/glsl/builtin_functions.h | 3 +
src/compiler/glsl/float64.glsl | 44 ++++++++++++++
src/compiler/glsl/glcpp/glcpp-parse.y | 1 +
5 files changed, 156 insertions(+)
diff --git a/src/compiler/glsl/builtin_float64.h b/src/compiler/glsl/builtin_float64.h
index 8546048..2340c48 100644
--- a/src/compiler/glsl/builtin_float64.h
+++ b/src/compiler/glsl/builtin_float64.h
@@ -96,3 +96,107 @@ fsign64(void *mem_ctx, builtin_available_predicate avail)
sig->replace_parameters(&sig_parameters);
return sig;
}
+ir_function_signature *
+extractFloat64FracLo(void *mem_ctx, builtin_available_predicate avail)
+{
+ ir_function_signature *const sig =
+ new(mem_ctx) ir_function_signature(glsl_type::uint_type, avail);
+ ir_factory body(&sig->body, mem_ctx);
+ sig->is_defined = true;
+
+ exec_list sig_parameters;
+
+ ir_variable *const r0024 = new(mem_ctx) ir_variable(glsl_type::uvec2_type, "a", ir_var_function_in);
+ sig_parameters.push_tail(r0024);
+ ir_swizzle *const r0025 = swizzle_x(r0024);
+ body.emit(ret(r0025));
+
+ sig->replace_parameters(&sig_parameters);
+ return sig;
+}
+ir_function_signature *
+extractFloat64FracHi(void *mem_ctx, builtin_available_predicate avail)
+{
+ ir_function_signature *const sig =
+ new(mem_ctx) ir_function_signature(glsl_type::uint_type, avail);
+ ir_factory body(&sig->body, mem_ctx);
+ sig->is_defined = true;
+
+ exec_list sig_parameters;
+
+ ir_variable *const r0026 = new(mem_ctx) ir_variable(glsl_type::uvec2_type, "a", ir_var_function_in);
+ sig_parameters.push_tail(r0026);
+ ir_expression *const r0027 = bit_and(swizzle_y(r0026), body.constant(1048575u));
+ body.emit(ret(r0027));
+
+ sig->replace_parameters(&sig_parameters);
+ return sig;
+}
+ir_function_signature *
+extractFloat64Exp(void *mem_ctx, builtin_available_predicate avail)
+{
+ ir_function_signature *const sig =
+ new(mem_ctx) ir_function_signature(glsl_type::int_type, avail);
+ ir_factory body(&sig->body, mem_ctx);
+ sig->is_defined = true;
+
+ exec_list sig_parameters;
+
+ ir_variable *const r0028 = new(mem_ctx) ir_variable(glsl_type::uvec2_type, "a", ir_var_function_in);
+ sig_parameters.push_tail(r0028);
+ ir_expression *const r0029 = rshift(swizzle_y(r0028), body.constant(int(20)));
+ ir_expression *const r002A = bit_and(r0029, body.constant(2047u));
+ ir_expression *const r002B = expr(ir_unop_u2i, r002A);
+ body.emit(ret(r002B));
+
+ sig->replace_parameters(&sig_parameters);
+ return sig;
+}
+ir_function_signature *
+feq64(void *mem_ctx, builtin_available_predicate avail)
+{
+ ir_function_signature *const sig =
+ new(mem_ctx) ir_function_signature(glsl_type::bool_type, avail);
+ ir_factory body(&sig->body, mem_ctx);
+ sig->is_defined = true;
+
+ exec_list sig_parameters;
+
+ ir_variable *const r002C = new(mem_ctx) ir_variable(glsl_type::uvec2_type, "a", ir_var_function_in);
+ sig_parameters.push_tail(r002C);
+ ir_variable *const r002D = new(mem_ctx) ir_variable(glsl_type::uvec2_type, "b", ir_var_function_in);
+ sig_parameters.push_tail(r002D);
+ ir_variable *const r002E = body.make_temp(glsl_type::bool_type, "mix_retval");
+ ir_expression *const r002F = rshift(swizzle_y(r002C), body.constant(int(20)));
+ ir_expression *const r0030 = bit_and(r002F, body.constant(2047u));
+ ir_expression *const r0031 = expr(ir_unop_u2i, r0030);
+ ir_expression *const r0032 = equal(r0031, body.constant(int(2047)));
+ ir_expression *const r0033 = bit_and(swizzle_y(r002C), body.constant(1048575u));
+ ir_expression *const r0034 = bit_or(r0033, swizzle_x(r002C));
+ ir_expression *const r0035 = nequal(r0034, body.constant(0u));
+ ir_expression *const r0036 = logic_and(r0032, r0035);
+ ir_expression *const r0037 = rshift(swizzle_y(r002D), body.constant(int(20)));
+ ir_expression *const r0038 = bit_and(r0037, body.constant(2047u));
+ ir_expression *const r0039 = expr(ir_unop_u2i, r0038);
+ ir_expression *const r003A = equal(r0039, body.constant(int(2047)));
+ ir_expression *const r003B = bit_and(swizzle_y(r002D), body.constant(1048575u));
+ ir_expression *const r003C = bit_or(r003B, swizzle_x(r002D));
+ ir_expression *const r003D = nequal(r003C, body.constant(0u));
+ ir_expression *const r003E = logic_and(r003A, r003D);
+ ir_expression *const r003F = logic_or(r0036, r003E);
+ ir_expression *const r0040 = equal(swizzle_x(r002C), swizzle_x(r002D));
+ ir_expression *const r0041 = equal(swizzle_y(r002C), swizzle_y(r002D));
+ ir_expression *const r0042 = equal(swizzle_x(r002C), body.constant(0u));
+ ir_expression *const r0043 = bit_or(swizzle_y(r002C), swizzle_y(r002D));
+ ir_expression *const r0044 = lshift(r0043, body.constant(int(1)));
+ ir_expression *const r0045 = equal(r0044, body.constant(0u));
+ ir_expression *const r0046 = logic_and(r0042, r0045);
+ ir_expression *const r0047 = logic_or(r0041, r0046);
+ ir_expression *const r0048 = logic_and(r0040, r0047);
+ body.emit(assign(r002E, expr(ir_triop_csel, r003F, body.constant(false), r0048), 0x01));
+
+ body.emit(ret(r002E));
+
+ sig->replace_parameters(&sig_parameters);
+ return sig;
+}
diff --git a/src/compiler/glsl/builtin_functions.cpp b/src/compiler/glsl/builtin_functions.cpp
index 17aa868..2298c40 100644
--- a/src/compiler/glsl/builtin_functions.cpp
+++ b/src/compiler/glsl/builtin_functions.cpp
@@ -3354,6 +3354,10 @@ builtin_builder::create_builtins()
generate_ir::fsign64(mem_ctx, integer_functions_supported),
NULL);
+ add_function("__builtin_feq64",
+ generate_ir::feq64(mem_ctx, integer_functions_supported),
+ NULL);
+
#undef F
#undef FI
#undef FIUD_VEC
diff --git a/src/compiler/glsl/builtin_functions.h b/src/compiler/glsl/builtin_functions.h
index 7954373..8cfdf49 100644
--- a/src/compiler/glsl/builtin_functions.h
+++ b/src/compiler/glsl/builtin_functions.h
@@ -76,6 +76,9 @@ fneg64(void *mem_ctx, builtin_available_predicate avail);
ir_function_signature *
fsign64(void *mem_ctx, builtin_available_predicate avail);
+ir_function_signature *
+feq64(void *mem_ctx, builtin_available_predicate avail);
+
}
#endif /* BULITIN_FUNCTIONS_H */
diff --git a/src/compiler/glsl/float64.glsl b/src/compiler/glsl/float64.glsl
index f8eb1f3..0cd7991 100644
--- a/src/compiler/glsl/float64.glsl
+++ b/src/compiler/glsl/float64.glsl
@@ -60,3 +60,47 @@ fsign64(uvec2 a)
retval.y = mix((a.y & 0x80000000u) | 0x3FF00000u, 0u, (a.y << 1 | a.x) == 0u);
return retval;
}
+
+/* Returns the fraction bits of the double-precision floating-point value `a'.*/
+uint
+extractFloat64FracLo(uvec2 a)
+{
+ return a.x;
+}
+
+uint
+extractFloat64FracHi(uvec2 a)
+{
+ return a.y & 0x000FFFFFu;
+}
+
+/* Returns the exponent bits of the double-precision floating-point value `a'.*/
+int
+extractFloat64Exp(uvec2 a)
+{
+ return int((a.y>>20) & 0x7FFu);
+}
+
+/* Returns true if the double-precision floating-point value `a' is equal to the
+ * corresponding value `b', and false otherwise. The comparison is performed
+ * according to the IEEE Standard for Floating-Point Arithmetic.
+ */
+bool
+feq64(uvec2 a, uvec2 b)
+{
+ bool isaNaN;
+ bool isbNaN;
+
+ uint aFracLo = extractFloat64FracLo(a);
+ uint aFracHi = extractFloat64FracHi(a);
+ uint bFracLo = extractFloat64FracLo(b);
+ uint bFracHi = extractFloat64FracHi(b);
+ isaNaN = (extractFloat64Exp(a) == 0x7FF) &&
+ ((aFracHi | aFracLo) != 0u);
+ isbNaN = (extractFloat64Exp(b) == 0x7FF) &&
+ ((bFracHi | bFracLo) != 0u);
+
+ bool result = (a.x == b.x) &&
+ ((a.y == b.y) || ((a.x == 0u) && (((a.y | b.y)<<1) == 0u)));
+ return mix(result, false, isaNaN || isbNaN);
+}
diff --git a/src/compiler/glsl/glcpp/glcpp-parse.y b/src/compiler/glsl/glcpp/glcpp-parse.y
index 666543b..9ffca67 100644
--- a/src/compiler/glsl/glcpp/glcpp-parse.y
+++ b/src/compiler/glsl/glcpp/glcpp-parse.y
@@ -2371,6 +2371,7 @@ _glcpp_parser_handle_version_declaration(glcpp_parser_t *parser, intmax_t versio
add_builtin_define(parser, "__have_builtin_builtin_fabs64", 1);
add_builtin_define(parser, "__have_builtin_builtin_fneg64", 1);
add_builtin_define(parser, "__have_builtin_builtin_fsign64", 1);
+ add_builtin_define(parser, "__have_builtin_builtin_feq64", 1);
}
}
--
2.9.5
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