From: Nikolay Sivov nsivov@codeweavers.com
--- libs/vkd3d-shader/hlsl.y | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/libs/vkd3d-shader/hlsl.y b/libs/vkd3d-shader/hlsl.y index c9022c6f..1ab46bc3 100644 --- a/libs/vkd3d-shader/hlsl.y +++ b/libs/vkd3d-shader/hlsl.y @@ -2610,6 +2610,25 @@ static bool intrinsic_lerp(struct hlsl_ctx *ctx, return !!add_binary_arithmetic_expr(ctx, params->instrs, HLSL_OP2_ADD, params->args[0], mul, loc); }
+static bool intrinsic_log(struct hlsl_ctx *ctx, + const struct parse_initializer *params, const struct vkd3d_shader_location *loc) +{ + struct hlsl_ir_constant *coeff; + struct hlsl_ir_node *log; + + if (!elementwise_intrinsic_float_convert_args(ctx, params, loc)) + return false; + + if (!(log = add_unary_arithmetic_expr(ctx, params->instrs, HLSL_OP1_LOG2, params->args[0], loc))) + return false; + + /* ln(2) */ + if (!(coeff = hlsl_new_float_constant(ctx, 0.69314718055f, loc))) + return false; + + return !!add_binary_arithmetic_expr(ctx, params->instrs, HLSL_OP2_MUL, log, &coeff->node, loc); +} + static bool intrinsic_log10(struct hlsl_ctx *ctx, const struct parse_initializer *params, const struct vkd3d_shader_location *loc) { @@ -3005,6 +3024,7 @@ intrinsic_functions[] = {"ldexp", 2, true, intrinsic_ldexp}, {"length", 1, true, intrinsic_length}, {"lerp", 3, true, intrinsic_lerp}, + {"log", 1, true, intrinsic_log}, {"log10", 1, true, intrinsic_log10}, {"log2", 1, true, intrinsic_log2}, {"max", 2, true, intrinsic_max},