Use SSE4.1 ceilf when available and add badges to readme (#288)

.github/workflows/fuzz.yml

@@ -1,11 +1,15 @@
 name: Fuzz
 
 on:
-  # schedule:
-  #   - cron:  30 0 * * *
   pull_request:
     branches:
       - "**"
+  push:
+    branches: [ master ]
+    tags:
+      - "*"
+  schedule:
+    - cron:  30 0 * * *
   workflow_dispatch:
     inputs:
       duration:

README.md

@@ -1,4 +1,9 @@
 [![Build](https://github.com/DataDog/libddwaf/actions/workflows/build.yml/badge.svg)](https://github.com/DataDog/libddwaf/actions/workflows/build.yml)
+[![Test](https://github.com/DataDog/libddwaf/actions/workflows/test.yml/badge.svg)](https://github.com/DataDog/libddwaf/actions/workflows/test.yml)
+[![fuzz](https://github.com/DataDog/libddwaf/actions/workflows/fuzz.yml/badge.svg)](https://github.com/DataDog/libddwaf/actions/workflows/fuzz.yml)
+[![Coverage status](https://codecov.io/github/DataDog/libddwaf/coverage.svg?branch=master)](https://codecov.io/github/DataDog/libddwaf?branch=master)
+[![License](https://img.shields.io/badge/License-BSD%203--Clause-blue.svg)](LICENSE)
+[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](LICENSE)
 
 # Datadog's WAF & RASP Engine
 

src/glibc-compat/math.c

@@ -21,6 +21,18 @@ static float ceilf_local(float x)
         return x;
 }
 #else
+#if defined(__x86_64__)
+static float ceilf_local_sse41(float x)
+{
+    float result;
+    __asm__(
+        "roundss $0x0A, %[x], %[result]"
+        : [result] "=x" (result)
+        : [x] "x" (x)
+    );
+    return result;
+}
+#endif
 /* fp_force_eval ensures that the input value is computed when that's
    otherwise unused.  To prevent the constant folding of the input
    expression, an additional fp_barrier may be needed or a compilation
@@ -79,7 +91,16 @@ float ceilf(float x)
     if (unlikely(ceilf_global_ == NULL)) {
         void *ceilf_sym = dlsym(RTLD_DEFAULT, "ceilf");
         if (ceilf_sym == NULL || ceilf_sym == &ceilf) {
+#if defined(__x86_64__)
+            __builtin_cpu_init();
+            if (__builtin_cpu_supports("sse4.1")) {
+                ceilf_global_ = &ceilf_local_sse41;
+            } else {
+                ceilf_global_ = &ceilf_local;
+            }
+# else
             ceilf_global_ = &ceilf_local;
+#endif
         } else {
             ceilf_global_ = (ceilf_t)ceilf_sym;
         }