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enable nontrapping fptoint feature in c and zig example

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This commit is contained in:
Dennis Ranke
2022-01-02 16:06:01 +01:00
parent d239775411
commit acea5cb6e0
3 changed files with 7 additions and 7 deletions
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2
examples/c/build.sh
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@@ -1,6 +1,6 @@
#!/bin/bash
clang -O2 -Wno-incompatible-library-redeclaration --no-standard-libraries -ffast-math -Wl,--no-entry -Wl,--export-all -Wl,--import-memory -Wl,--initial-memory=262144 -Wl,-zstack-size=90000 -o cart.wasm cart.c --target=wasm32 && \
clang -O2 -Wno-incompatible-library-redeclaration --no-standard-libraries -ffast-math -Xclang -target-feature -Xclang +nontrapping-fptoint -Wl,--no-entry -Wl,--export-all -Wl,--import-memory -Wl,--initial-memory=262144 -Wl,-zstack-size=90000 -o cart.wasm cart.c --target=wasm32 && \
uw8 filter-exports cart.wasm cart.wasm && \
wasm-opt -Oz --fast-math --strip-producers -o cart.wasm cart.wasm && \
uw8 pack -l 9 cart.wasm cart.uw8

6
examples/c/cart.c
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@@ -3,10 +3,6 @@
IMPORT("env", "atan2") extern float atan2(float, float);
IMPORT("env", "time") extern float time();
int ftoi(float v) {
return __builtin_wasm_trunc_s_i32_f32(v);
}
float sqrt(float v) {
return __builtin_sqrt(v);
}
@@ -22,7 +18,7 @@ void upd() {
float y = (float)(i / 320 - 120);
float d = 40000.0f / sqrt(x * x + y * y + 1.0f);
float u = atan2(x, y) * 512.0f / 3.141f;
unsigned char c = (unsigned char)(ftoi(d + t * 2.0f) ^ ftoi(u + t)) >> 4;
unsigned char c = (unsigned char)((int)(d + t * 2.0f) ^ (int)(u + t)) >> 4;
FRAMEBUFFER[i] = c;
i += 1;

6
examples/zig/build.zig
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@@ -5,7 +5,11 @@ pub fn build(b: *std.build.Builder) void {
const lib = b.addSharedLibrary("cart", "main.zig", .unversioned);
lib.setBuildMode(mode);
lib.setTarget(.{ .cpu_arch = .wasm32, .os_tag = .freestanding });
lib.setTarget(.{
.cpu_arch = .wasm32,
.os_tag = .freestanding,
.cpu_features_add = std.Target.wasm.featureSet(&.{ .nontrapping_fptoint })
});
lib.import_memory = true;
lib.initial_memory = 262144;
lib.max_memory = 262144;