commit 00590a4a42bf82b4777dc94fc3daefdc8d04f798
author Daniel Stone <daniels@collabora.com> Tue Sep 15 13:01:04 2020 -0400
committer Copybara-Service <copybara-worker@google.com> Thu Oct 29 17:41:28 2020 -0700
tree 89e1a498ccc4c9c67547e98d70383f9b124bb2c9
parent 006a38b9d5e01978090641e4ce3047f98fb0e49f

libclc: Add a __builtin to let SPIRV targets select between SW and HW FMA

Reviewer: jenatali jvesely
Differential Revision: https://reviews.llvm.org/D85910
GitOrigin-RevId: 291bfff5dbb70360730e91b4019f8080e4e3d7f5

generic/lib/math/math.h

diff --git a/generic/lib/math/math.h b/generic/lib/math/math.h
index c931d19..351e37d 100644
--- a/generic/lib/math/math.h
+++ b/generic/lib/math/math.h
@@ -40,6 +40,9 @@
 
 #if (defined __AMDGCN__ || defined __R600__) && !defined __HAS_FMAF__
 #define HAVE_HW_FMA32() (0)
+#elif defined CLC_SPIRV || defined CLC_SPIRV64
+bool __attribute__((noinline)) __clc_runtime_has_hw_fma32(void);
+#define HAVE_HW_FMA32() __clc_runtime_has_hw_fma32()
 #else
 #define HAVE_HW_FMA32() (1)
 #endif

spirv/lib/math/fma.cl

diff --git a/spirv/lib/math/fma.cl b/spirv/lib/math/fma.cl
index 982ddc4..7914242 100644
--- a/spirv/lib/math/fma.cl
+++ b/spirv/lib/math/fma.cl
@@ -4,3 +4,8 @@
 #define __CLC_BODY <fma.inc>
 #define __FLOAT_ONLY
 #include <clc/math/gentype.inc>
+
+bool __clc_runtime_has_hw_fma32()
+{
+    return false;
+}

spirv64/lib/math/fma.cl

diff --git a/spirv64/lib/math/fma.cl b/spirv64/lib/math/fma.cl
index 982ddc4..7914242 100644
--- a/spirv64/lib/math/fma.cl
+++ b/spirv64/lib/math/fma.cl
@@ -4,3 +4,8 @@
 #define __CLC_BODY <fma.inc>
 #define __FLOAT_ONLY
 #include <clc/math/gentype.inc>
+
+bool __clc_runtime_has_hw_fma32()
+{
+    return false;
+}