configure: Add support for detecting AVX512 instructions

Tested on Linux with Clang 3.7, GCC 4.9, 5.1 and 6.0, ICC 16 beta; on OS
X with Clang-XCode 6.4, ICC 16 beta; on Windows with MSVC 2013 and ICC
15. MinGW is not tested.

GCC 4.9:     AVX512F AVX512ER AVX512CD AVX512PF
GCC 5 & 6:   AVX512F AVX512ER AVX512CD AVX512PF AVX512DQ AVX512BW AVX512VL AVX512IFMA AVX512VBMI
Clang 3.7:   AVX512F AVX512ER AVX512CD
Clang-XCode: <none>
ICC 15 & 16: AVX512F AVX512ER AVX512CD AVX512PF AVX512DQ AVX512BW AVX512VL
MSVC 2013:   <none>

Change-Id: Ib306f8f647014b399b87ffff13f1da1b161c31d7
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

5 files changed, 71 insertions, 0 deletions

diff --git a/mkspecs/common/gcc-base.conf b/mkspecs/common/gcc-base.conf
index 27e812b3a1..6e043f558f 100644
--- a/mkspecs/common/gcc-base.conf
+++ b/mkspecs/common/gcc-base.conf
@@ -86,6 +86,15 @@ QMAKE_CFLAGS_SSE4_1    += -msse4.1
 QMAKE_CFLAGS_SSE4_2    += -msse4.2
 QMAKE_CFLAGS_AVX       += -mavx
 QMAKE_CFLAGS_AVX2      += -mavx2
+QMAKE_CFLAGS_AVX512F   += -mavx512f
+QMAKE_CFLAGS_AVX512ER  += -mavx512er
+QMAKE_CFLAGS_AVX512CD  += -mavx512cd
+QMAKE_CFLAGS_AVX512PF  += -mavx512pf
+QMAKE_CFLAGS_AVX512DQ  += -mavx512dq
+QMAKE_CFLAGS_AVX512BW  += -mavx512bw
+QMAKE_CFLAGS_AVX512VL  += -mavx512vl
+QMAKE_CFLAGS_AVX512IFMA += -mavx512ifma
+QMAKE_CFLAGS_AVX512VBMI += -mavx512vbmi
 QMAKE_CFLAGS_NEON      += -mfpu=neon
 
 # Wrapper tools that understand .o/.a files with GIMPLE instead of machine code
diff --git a/mkspecs/features/simd.prf b/mkspecs/features/simd.prf
index 700d79a1b5..4aafdbe5ed 100644
--- a/mkspecs/features/simd.prf
+++ b/mkspecs/features/simd.prf
@@ -95,6 +95,47 @@ addSimdCompiler(sse4_1)
 addSimdCompiler(sse4_2)
 addSimdCompiler(avx)
 addSimdCompiler(avx2)
+addSimdCompiler(avx512f)
+addSimdCompiler(avx512cd)
+addSimdCompiler(avx512er)
+addSimdCompiler(avx512pf)
+addSimdCompiler(avx512dq)
+addSimdCompiler(avx512bw)
+addSimdCompiler(avx512vl)
+addSimdCompiler(avx512ifma)
+addSimdCompiler(avx512vbmi)
 addSimdCompiler(neon)
 addSimdCompiler(mips_dsp)
 addSimdCompiler(mips_dspr2)
+
+# Follow the Intel compiler's lead and define profiles of AVX512 instructions
+defineTest(addAvx512Profile) {
+    name = $$1
+    dependencies = $$2
+    upname = $$upper($$name)
+    varname = QMAKE_CFLAGS_$$upname
+
+    cpu_features_missing =
+    cflags = $$QMAKE_CFLAGS_AVX512F
+    for(part, dependencies) {
+        !CONFIG($$part): return()           # Profile isn't supported by the compiler
+
+        uppart = $$upper($$part)
+        cflags *= $$eval(QMAKE_CFLAGS_$${uppart})
+        !contains(QT_CPU_FEATURES, $$uppart): cpu_features_missing += $$uppart
+    }
+
+    CONFIG += $$name
+    isEmpty(cpu_features_missing): QT_CPU_FEATURES += $$name
+    $$varname = $$cflags
+
+    export(QT_CPU_FEATURES)
+    export(CONFIG)
+    export($$varname)
+    addSimdCompiler($$name)
+}
+addAvx512Profile(avx512common, avx512cd)
+addAvx512Profile(avx512mic, avx512cd avx512er avx512pf)
+addAvx512Profile(avx512core, avx512cd avx512bw avx512dq avx512vl)
+addAvx512Profile(avx512ifmavl, avx512ifma avx512vl)
+addAvx512Profile(avx512vbmivl, avx512vbmi avx512vl)
diff --git a/mkspecs/linux-icc/qmake.conf b/mkspecs/linux-icc/qmake.conf
index 57f6c45ac1..c71c223768 100644
--- a/mkspecs/linux-icc/qmake.conf
+++ b/mkspecs/linux-icc/qmake.conf
@@ -35,6 +35,13 @@ QMAKE_CFLAGS_SSE4_1    += -xSSE4.1
 QMAKE_CFLAGS_SSE4_2    += -xSSE4.2
 QMAKE_CFLAGS_AVX       += -xAVX
 QMAKE_CFLAGS_AVX2      += -xCORE-AVX2
+QMAKE_CFLAGS_AVX512F   += -xCOMMON-AVX512
+QMAKE_CFLAGS_AVX512CD  += -xCOMMON-AVX512
+QMAKE_CFLAGS_AVX512ER  += -xMIC-AVX512
+QMAKE_CFLAGS_AVX512PF  += -xMIC-AVX512
+QMAKE_CFLAGS_AVX512DQ  += -xCORE-AVX512
+QMAKE_CFLAGS_AVX512BW  += -xCORE-AVX512
+QMAKE_CFLAGS_AVX512VL  += -xCORE-AVX512
 
 QMAKE_CXX               = icpc
 QMAKE_CXXFLAGS          = $$QMAKE_CFLAGS
diff --git a/mkspecs/macx-icc/qmake.conf b/mkspecs/macx-icc/qmake.conf
index efce568ea9..4d2dd736b1 100644
--- a/mkspecs/macx-icc/qmake.conf
+++ b/mkspecs/macx-icc/qmake.conf
@@ -33,6 +33,13 @@ QMAKE_CFLAGS_SSE4_1    += -msse4.1
 QMAKE_CFLAGS_SSE4_2    += -msse4.2
 QMAKE_CFLAGS_AVX       += -mavx
 QMAKE_CFLAGS_AVX2      += -march=core-avx2
+QMAKE_CFLAGS_AVX512F   += -xCOMMON-AVX512
+QMAKE_CFLAGS_AVX512CD  += -xCOMMON-AVX512
+QMAKE_CFLAGS_AVX512ER  += -xMIC-AVX512
+QMAKE_CFLAGS_AVX512PF  += -xMIC-AVX512
+QMAKE_CFLAGS_AVX512DQ  += -xCORE-AVX512
+QMAKE_CFLAGS_AVX512BW  += -xCORE-AVX512
+QMAKE_CFLAGS_AVX512VL  += -xCORE-AVX512
 
 QMAKE_OBJECTIVE_CC      = clang
 QMAKE_OBJECTIVE_CFLAGS          = -pipe
diff --git a/mkspecs/win32-icc/qmake.conf b/mkspecs/win32-icc/qmake.conf
index 65b533b3dd..0e6a2cbba4 100644
--- a/mkspecs/win32-icc/qmake.conf
+++ b/mkspecs/win32-icc/qmake.conf
@@ -32,6 +32,13 @@ QMAKE_CFLAGS_SSE4_1     = -QxSSE4.1
 QMAKE_CFLAGS_SSE4_2     = -QxSSE4.2
 QMAKE_CFLAGS_AVX        = -QxAVX
 QMAKE_CFLAGS_AVX2       = -QxCORE-AVX2
+QMAKE_CFLAGS_AVX512F   += -QxCOMMON-AVX512
+QMAKE_CFLAGS_AVX512CD  += -QxCOMMON-AVX512
+QMAKE_CFLAGS_AVX512ER  += -QxMIC-AVX512
+QMAKE_CFLAGS_AVX512PF  += -QxMIC-AVX512
+QMAKE_CFLAGS_AVX512DQ  += -QxCORE-AVX512
+QMAKE_CFLAGS_AVX512BW  += -QxCORE-AVX512
+QMAKE_CFLAGS_AVX512VL  += -QxCORE-AVX512
 
 QMAKE_CXX               = $$QMAKE_CC
 QMAKE_CXXFLAGS          = $$QMAKE_CFLAGS /Zc:forScope