diff options
| -rw-r--r-- | src/compiler/glsl/ir_constant_expression.cpp | 39 |
1 files changed, 28 insertions, 11 deletions
diff --git a/src/compiler/glsl/ir_constant_expression.cpp b/src/compiler/glsl/ir_constant_expression.cpp index a032ac6d4d5..442db760045 100644 --- a/src/compiler/glsl/ir_constant_expression.cpp +++ b/src/compiler/glsl/ir_constant_expression.cpp @@ -519,6 +519,24 @@ find_msb_int(int32_t v) return find_msb_uint(v < 0 ? ~v : v); } +static float +ldexpf_flush_subnormal(float x, int exp) +{ + const float result = ldexpf(x, exp); + + /* Flush subnormal values to zero. */ + return !isnormal(result) ? copysignf(0.0f, x) : result; +} + +static double +ldexp_flush_subnormal(double x, int exp) +{ + const double result = ldexp(x, exp); + + /* Flush subnormal values to zero. */ + return !isnormal(result) ? copysign(0.0, x) : result; +} + ir_constant * ir_expression::constant_expression_value(struct hash_table *variable_context) { @@ -1617,17 +1635,16 @@ ir_expression::constant_expression_value(struct hash_table *variable_context) } case ir_binop_ldexp: - for (unsigned c = 0; c < components; c++) { - if (op[0]->type->base_type == GLSL_TYPE_DOUBLE) { - data.d[c] = ldexp(op[0]->value.d[c], op[1]->value.i[c]); - /* Flush subnormal values to zero. */ - if (!isnormal(data.d[c])) - data.d[c] = copysign(0.0, op[0]->value.d[c]); - } else { - data.f[c] = ldexpf(op[0]->value.f[c], op[1]->value.i[c]); - /* Flush subnormal values to zero. */ - if (!isnormal(data.f[c])) - data.f[c] = copysignf(0.0f, op[0]->value.f[c]); + for (unsigned c = 0; c < op[0]->type->components(); c++) { + switch (this->type->base_type) { + case GLSL_TYPE_FLOAT: + data.f[c] = ldexpf_flush_subnormal(op[0]->value.f[c], op[1]->value.i[c]); + break; + case GLSL_TYPE_DOUBLE: + data.d[c] = ldexp_flush_subnormal(op[0]->value.d[c], op[1]->value.i[c]); + break; + default: + assert(0); } } break; |