[libclc] 291bfff - libclc: Add a __builtin to let SPIRV targets select between SW and HW FMA

[Jan Vesely via cfe-commits]

Author: Daniel Stone
Date: 2020-09-16T01:37:22-04:00
New Revision: 291bfff5dbb70360730e91b4019f8080e4e3d7f5

URL: https://github.com/llvm/llvm-project/commit/291bfff5dbb70360730e91b4019f8080e4e3d7f5
DIFF: https://github.com/llvm/llvm-project/commit/291bfff5dbb70360730e91b4019f8080e4e3d7f5.diff

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

Reviewer: jenatali jvesely
Differential Revision: https://reviews.llvm.org/D85910

Added: 
    

Modified: 
    libclc/generic/lib/math/math.h
    libclc/spirv/lib/math/fma.cl
    libclc/spirv64/lib/math/fma.cl

Removed: 
    


################################################################################
diff  --git a/libclc/generic/lib/math/math.h b/libclc/generic/lib/math/math.h
index c931d19a380c..351e37dc3f12 100644
--- a/libclc/generic/lib/math/math.h
+++ b/libclc/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

diff  --git a/libclc/spirv/lib/math/fma.cl b/libclc/spirv/lib/math/fma.cl
index 982ddc4374f3..79142425e52d 100644
--- a/libclc/spirv/lib/math/fma.cl
+++ b/libclc/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;
+}

diff  --git a/libclc/spirv64/lib/math/fma.cl b/libclc/spirv64/lib/math/fma.cl
index 982ddc4374f3..79142425e52d 100644
--- a/libclc/spirv64/lib/math/fma.cl
+++ b/libclc/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;
+}