Merge pull request #3452 from juj/llvm_fabs_f32

Add support and test for llvm_fabs_f32.

src/library.js

@@ -3993,6 +3993,7 @@ LibraryManager.library = {
   fabs: 'Math_abs',
   fabsf: 'Math_abs',
   fabsl: 'Math_abs',
+  llvm_fabs_f32: 'Math_abs',
   llvm_fabs_f64: 'Math_abs',
   ceil: 'Math_ceil',
   ceilf: 'Math_ceil',

tests/core/test_llvm_fabs.c

@@ -0,0 +1,30 @@
+#include <math.h>
+#include <stdio.h>
+#include <float.h>
+#include <emscripten/emscripten.h>
+
+float __attribute__((noinline)) negative10()
+{
+  return (emscripten_random() < -1) ? 0.f : -10.5f;
+}
+
+float __attribute__((noinline)) positive42()
+{
+  return (emscripten_random() < -1) ? 0.f : 42.25f;
+}
+
+double __attribute__((noinline)) negative_dbl_max()
+{
+  return (emscripten_random() < -1) ? 0.f : -DBL_MAX;
+}
+
+int main()
+{
+  printf("%f\n", __builtin_fabsf(negative10()));
+  printf("%f\n", __builtin_fabsf(positive42()));
+  printf("%f\n", __builtin_fabsf(negative_dbl_max()));
+
+  printf("%f\n", __builtin_fabs(negative10()));
+  printf("%f\n", __builtin_fabs(positive42()));
+  printf("%f\n", __builtin_fabs(negative_dbl_max()));
+}

tests/core/test_llvm_fabs.out

@@ -0,0 +1,6 @@
+10.500000
+42.250000
+inf
+10.500000
+42.250000
+1.7976931348623157e+308

tests/test_core.py

@@ -396,6 +396,12 @@ class T(RunnerCore): # Short name, to make it more fun to use manually on the co
 
     self.do_run_from_file(src, output, 'waka fleefl asdfasdfasdfasdf'.split(' '))
 
+  def test_llvm_fabs(self):
+    Settings.PRECISE_F32 = 1
+    test_path = path_from_root('tests', 'core', 'test_llvm_fabs')
+    src, output = (test_path + s for s in ('.c', '.out'))
+    self.do_run_from_file(src, output)
+
   def test_double_varargs(self):
     test_path = path_from_root('tests', 'core', 'test_double_varargs')
     src, output = (test_path + s for s in ('.c', '.out'))