From 868ee737cf44bcc5ff68f4388bf1201227bc8a85 Mon Sep 17 00:00:00 2001
From: Pierre Krieger <pierre.krieger1708@gmail.com>
Date: Sat, 13 Feb 2016 13:20:47 +0100
Subject: [PATCH] Implement some missing maths-related intrinsics

---
 src/library.js                      |  6 ++++++
 src/preamble.js                     |  6 ++++++
 tests/core/test_llvm_intrinsics.in  | 13 +++++++++++++
 tests/core/test_llvm_intrinsics.out |  6 ++++++
 4 files changed, 31 insertions(+)

diff --git a/src/library.js b/src/library.js
index 0734eacd0f43b..4d91d43024814 100644
--- a/src/library.js
+++ b/src/library.js
@@ -1398,10 +1398,16 @@ LibraryManager.library = {
   llvm_sqrt_f64: 'Math_sqrt',
   llvm_pow_f32: 'Math_pow',
   llvm_pow_f64: 'Math_pow',
+  llvm_powi_f32: 'Math_pow',
+  llvm_powi_f64: 'Math_pow',
   llvm_log_f32: 'Math_log',
   llvm_log_f64: 'Math_log',
   llvm_exp_f32: 'Math_exp',
   llvm_exp_f64: 'Math_exp',
+  llvm_trunc_f32: 'Math_trunc',
+  llvm_trunc_f64: 'Math_trunc',
+  llvm_floor_f32: 'Math_floor',
+  llvm_floor_f64: 'Math_floor',
 
   round__asm: true,
   round__sig: 'dd',
diff --git a/src/preamble.js b/src/preamble.js
index f8afdf5f0420d..bddd6f8ccd73e 100644
--- a/src/preamble.js
+++ b/src/preamble.js
@@ -1746,6 +1746,11 @@ if (!Math['clz32']) Math['clz32'] = function(x) {
 };
 Math.clz32 = Math['clz32']
 
+if (!Math['trunc']) Math['trunc'] = function(x) {
+  return x < 0 ? Math.ceil(x) : Math.floor(x);
+};
+Math.trunc = Math['trunc'];
+
 var Math_abs = Math.abs;
 var Math_cos = Math.cos;
 var Math_sin = Math.sin;
@@ -1764,6 +1769,7 @@ var Math_imul = Math.imul;
 var Math_fround = Math.fround;
 var Math_min = Math.min;
 var Math_clz32 = Math.clz32;
+var Math_trunc = Math.trunc;
 
 // A counter of dependencies for calling run(). If we need to
 // do asynchronous work before running, increment this and
diff --git a/tests/core/test_llvm_intrinsics.in b/tests/core/test_llvm_intrinsics.in
index 4b943f0e5270a..04f60ed6648eb 100644
--- a/tests/core/test_llvm_intrinsics.in
+++ b/tests/core/test_llvm_intrinsics.in
@@ -11,6 +11,12 @@ extern int64_t llvm_cttz_i64(int64_t x, int izZeroUndef);
 extern int32_t llvm_ctpop_i32(int32_t x);
 extern int64_t llvm_ctpop_i64(int64_t x);
 extern int llvm_expect_i32(int x, int y);
+extern float llvm_powi_f32(float x, int32_t y);
+extern double llvm_powi_f64(double x, int32_t y);
+extern float llvm_trunc_f32(float x);
+extern double llvm_trunc_f64(double x);
+extern float llvm_floor_f32(float x);
+extern double llvm_floor_f64(double x);
 }
 
 int main(void) {
@@ -40,5 +46,12 @@ int main(void) {
   a = __builtin_bswap64(a);
   printf("%lld\n", a);
 
+  printf("%d\n", (int)llvm_powi_f32(5.0f, 3));
+  printf("%d\n", (int)llvm_powi_f64(3.0, 5));
+  printf("%d\n", (int)llvm_trunc_f32(18.0987f));
+  printf("%d\n", (int)llvm_trunc_f64(-12.42));
+  printf("%d\n", (int)llvm_floor_f32(27.665f));
+  printf("%d\n", (int)llvm_floor_f64(-8.95));
+
   return 0;
 }
diff --git a/tests/core/test_llvm_intrinsics.out b/tests/core/test_llvm_intrinsics.out
index 659b3c21e72a9..5a137f8765ec4 100644
--- a/tests/core/test_llvm_intrinsics.out
+++ b/tests/core/test_llvm_intrinsics.out
@@ -8,3 +8,9 @@ c5,de,15,8a
 22
 13
 72057594037927936
+125
+243
+18
+-12
+27
+-9
\ No newline at end of file