tint: Implement modf and frexp built-ins for f16 types
This patch implement modf and frexp built-ins for f16 types, and also
simplify their implementation for f32 in MSL and HLSL, and clean up
deprecated code in GLSL writer. Corresponding unittests are also
implemented, but end-to-end tests for f16 are not implemented yet.
Bug: tint:1473, tint:1502
Change-Id: I12887ae5303c6dc032a51f619e1afeb19b4603b6
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/98102
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Zhaoming Jiang <zhaoming.jiang@intel.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
diff --git a/test/tint/builtins/gen/var/modf/bbf7f7.wgsl.expected.msl b/test/tint/builtins/gen/var/modf/bbf7f7.wgsl.expected.msl
new file mode 100644
index 0000000..2ef6251
--- /dev/null
+++ b/test/tint/builtins/gen/var/modf/bbf7f7.wgsl.expected.msl
@@ -0,0 +1,45 @@
+#include <metal_stdlib>
+
+using namespace metal;
+
+struct modf_result {
+ float fract;
+ float whole;
+};
+modf_result tint_modf(float param_0) {
+ modf_result result;
+ result.fract = modf(param_0, result.whole);
+ return result;
+}
+
+void modf_bbf7f7() {
+ float arg_0 = 1.0f;
+ modf_result res = tint_modf(arg_0);
+}
+
+struct tint_symbol {
+ float4 value [[position]];
+};
+
+float4 vertex_main_inner() {
+ modf_bbf7f7();
+ return float4(0.0f);
+}
+
+vertex tint_symbol vertex_main() {
+ float4 const inner_result = vertex_main_inner();
+ tint_symbol wrapper_result = {};
+ wrapper_result.value = inner_result;
+ return wrapper_result;
+}
+
+fragment void fragment_main() {
+ modf_bbf7f7();
+ return;
+}
+
+kernel void compute_main() {
+ modf_bbf7f7();
+ return;
+}
+
