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glsl: Handle highp promotion of builtin function args in the builtins.

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It's what the spec says to do.  This will may help us avoid special-casing
these functions if we ever lower precision after builtin inlining.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21666>
This commit is contained in:
Emma Anholt 2023-03-01 15:04:49 -08:00 • committed by Marge Bot
parent be2731f445
commit b1d228e9d5
1 changed files with 13 additions and 4 deletions
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17
src/compiler/glsl/builtin_functions.cpp
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@ -1022,6 +1022,7 @@ private:
ir_variable *out_var(const glsl_type *type, const char *name);
ir_variable *out_lowp_var(const glsl_type *type, const char *name);
ir_variable *out_highp_var(const glsl_type *type, const char *name);
ir_variable *as_highp(ir_factory &body, ir_variable *var);
ir_constant *imm(float f, unsigned vector_elements=1);
ir_constant *imm(bool b, unsigned vector_elements=1);
ir_constant *imm(int i, unsigned vector_elements=1);
@ -5696,6 +5697,14 @@ builtin_builder::out_highp_var(const glsl_type *type, const char *name)
return var;
}
ir_variable *
builtin_builder::as_highp(ir_factory &body, ir_variable *var)
{
ir_variable *t = body.make_temp(var->type, "highp_tmp");
body.emit(assign(t, var));
return t;
}
ir_constant *
builtin_builder::imm(bool b, unsigned vector_elements)
{
@ -6260,7 +6269,7 @@ builtin_builder::_floatBitsToInt(const glsl_type *type)
{
ir_variable *x = in_var(type, "x");
MAKE_SIG(glsl_type::ivec(type->vector_elements), shader_bit_encoding, 1, x);
body.emit(ret(bitcast_f2i(x)));
body.emit(ret(bitcast_f2i(as_highp(body, x))));
return sig;
}
@ -6269,7 +6278,7 @@ builtin_builder::_floatBitsToUint(const glsl_type *type)
{
ir_variable *x = in_var(type, "x");
MAKE_SIG(glsl_type::uvec(type->vector_elements), shader_bit_encoding, 1, x);
body.emit(ret(bitcast_f2u(x)));
body.emit(ret(bitcast_f2u(as_highp(body, x))));
return sig;
}
@ -6278,7 +6287,7 @@ builtin_builder::_intBitsToFloat(const glsl_type *type)
{
ir_variable *x = in_var(type, "x");
MAKE_SIG(glsl_type::vec(type->vector_elements), shader_bit_encoding, 1, x);
body.emit(ret(bitcast_i2f(x)));
body.emit(ret(bitcast_i2f(as_highp(body, x))));
return sig;
}
@ -6287,7 +6296,7 @@ builtin_builder::_uintBitsToFloat(const glsl_type *type)
{
ir_variable *x = in_var(type, "x");
MAKE_SIG(glsl_type::vec(type->vector_elements), shader_bit_encoding, 1, x);
body.emit(ret(bitcast_u2f(x)));
body.emit(ret(bitcast_u2f(as_highp(body, x))));
return sig;
}