new port: math/libpgmath

This adds the compiler-callable math intrinsics library libpgmath. It is the
math library of the flang compiler with support for vector operations.

Patches were in large part adapted from the OpenBSD port.

Reviewed by:	zeising (mentor), mat
Approved by:	zeising (mentor)
Obtained from:	Brian Callahan (bcallah@openbsd.org) with adaptations
Differential Revision:	https://reviews.freebsd.org/D17034

1 files changed, 92 insertions, 0 deletions

diff --git a/math/libpgmath/files/patch-lib_common_CMakeLists.txt b/math/libpgmath/files/patch-lib_common_CMakeLists.txt
new file mode 100644
index 000000000000..3875fea39f8e
--- /dev/null
+++ b/math/libpgmath/files/patch-lib_common_CMakeLists.txt
@@ -0,0 +1,92 @@
+--- lib/common/CMakeLists.txt.orig	2018-09-03 06:03:48 UTC
++++ lib/common/CMakeLists.txt
+@@ -17,7 +17,7 @@
+ include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+ 
+ if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Windows")
+-  if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64|ppc64le|aarch64" AND NOT ${LIBPGMATH_WITH_GENERIC})
++  if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64|amd64|ppc64le|aarch64" AND NOT ${LIBPGMATH_WITH_GENERIC})
+     add_subdirectory("acos")
+     add_subdirectory("asin")
+     add_subdirectory("exp")
+@@ -33,8 +33,8 @@ get_property(FLAGS GLOBAL PROPERTY "FLAGS_L1")
+ get_property(DEFINITIONS GLOBAL PROPERTY "DEFINITIONS_L1")
+ 
+ set(SRCS)
+-if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64" AND NOT ${LIBPGMATH_WITH_GENERIC})
+-  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
++if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64|amd64" AND NOT ${LIBPGMATH_WITH_GENERIC})
++  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux|FreeBSD")
+     add_subdirectory("cos")
+     add_subdirectory("cosf")
+     add_subdirectory("sincosf")
+@@ -278,13 +278,13 @@ libmath_add_object_library("${SRCS}" "${FLAGS}" "${DEF
+ set(DEFINITIONS_CMPLX ${DEFINITIONS} MTH_CMPLX_C99_ABI)
+ libmath_add_object_library("${MTH_CMPLX_SRCS}" "${FLAGS}" "${DEFINITIONS_CMPLX}" "common_mth_cmplx")
+ 
+-if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64" AND NOT ${LIBPGMATH_WITH_GENERIC})
++if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64|amd64" AND NOT ${LIBPGMATH_WITH_GENERIC})
+   # Generate mth_128mask.c
+   set(TARGET_NAME "mth_128mask")
+   add_custom_command(OUTPUT ${TARGET_NAME}.c PRE_BUILD
+     COMMAND awk -v MAX_VREG_SIZE=128 -v TARGET=X8664 -f ${LIBPGMATH_TOOLS_DIR}/mth_mask.awk > ${TARGET_NAME}.c)
+   add_custom_target(${TARGET_NAME} ALL DEPENDS "${TARGET_NAME}.c")
+-  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
++  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux|FreeBSD")
+     set_property(SOURCE ${TARGET_NAME}.c APPEND_STRING PROPERTY COMPILE_FLAGS "-march=core2")
+   elseif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+     set_property(SOURCE ${TARGET_NAME}.c APPEND_STRING PROPERTY COMPILE_FLAGS "-msse2")
+@@ -297,7 +297,7 @@ if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64" AND NOT 
+   add_custom_command(OUTPUT ${TARGET_NAME}.c PRE_BUILD
+     COMMAND awk -v MAX_VREG_SIZE=128 -v TARGET=X8664 -f ${LIBPGMATH_TOOLS_DIR}/mth_generic_frp.awk > ${TARGET_NAME}.c)
+   add_custom_target(${TARGET_NAME} ALL DEPENDS "${TARGET_NAME}.c")
+-  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
++  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux|FreeBSD")
+     set_property(SOURCE ${TARGET_NAME}.c APPEND_STRING PROPERTY COMPILE_FLAGS "-march=core2")
+   elseif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+     set_property(SOURCE ${TARGET_NAME}.c APPEND_STRING PROPERTY COMPILE_FLAGS "-msse2")
+@@ -310,7 +310,7 @@ if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64" AND NOT 
+   add_custom_command(OUTPUT ${TARGET_NAME}.c PRE_BUILD
+     COMMAND awk -v MAX_VREG_SIZE=256 -v TARGET=X8664 -f ${LIBPGMATH_TOOLS_DIR}/mth_mask.awk > ${TARGET_NAME}.c)
+   add_custom_target(${TARGET_NAME} ALL DEPENDS "${TARGET_NAME}.c")
+-  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
++  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux|FreeBSD")
+     set_property(SOURCE ${TARGET_NAME}.c APPEND_STRING PROPERTY COMPILE_FLAGS "-march=sandybridge")
+   elseif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+     set_property(SOURCE ${TARGET_NAME}.c APPEND_STRING PROPERTY COMPILE_FLAGS "-mavx")
+@@ -323,7 +323,7 @@ if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64" AND NOT 
+   add_custom_command(OUTPUT ${TARGET_NAME}.c PRE_BUILD
+     COMMAND awk -v MAX_VREG_SIZE=256 -v TARGET=X8664 -f ${LIBPGMATH_TOOLS_DIR}/mth_generic_frp.awk > ${TARGET_NAME}.c)
+   add_custom_target(${TARGET_NAME} ALL DEPENDS "${TARGET_NAME}.c")
+-  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
++  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux|FreeBSD")
+     set_property(SOURCE ${TARGET_NAME}.c APPEND_STRING PROPERTY COMPILE_FLAGS "-march=sandybridge")
+   elseif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+     set_property(SOURCE ${TARGET_NAME}.c APPEND_STRING PROPERTY COMPILE_FLAGS "-mavx")
+@@ -337,7 +337,7 @@ if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64" AND NOT 
+     COMMAND awk -v MAX_VREG_SIZE=512 -v TARGET=X8664 -f ${LIBPGMATH_TOOLS_DIR}/mth_mask.awk > ${TARGET_NAME}.c)
+   add_custom_target(${TARGET_NAME} ALL DEPENDS "${TARGET_NAME}.c")
+   set_property(SOURCE ${TARGET_NAME}.c APPEND_STRING PROPERTY COMPILE_FLAGS "")
+-  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
++  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux|FreeBSD")
+     set_property(SOURCE ${TARGET_NAME}.c APPEND_STRING PROPERTY COMPILE_FLAGS "-mtune=knl -march=knl")
+   elseif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+     set_property(SOURCE ${TARGET_NAME}.c APPEND_STRING PROPERTY COMPILE_FLAGS "-mavx512f -mfma")
+@@ -350,7 +350,7 @@ if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64" AND NOT 
+   add_custom_command(OUTPUT ${TARGET_NAME}.c PRE_BUILD
+     COMMAND awk -v MAX_VREG_SIZE=512 -v TARGET=X8664 -f ${LIBPGMATH_TOOLS_DIR}/mth_generic_frp.awk > ${TARGET_NAME}.c)
+   add_custom_target(${TARGET_NAME} ALL DEPENDS "${TARGET_NAME}.c")
+-  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
++  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux|FreeBSD")
+     set_property(SOURCE ${TARGET_NAME}.c APPEND_STRING PROPERTY COMPILE_FLAGS "-mtune=knl -march=knl")
+   elseif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+     set_property(SOURCE ${TARGET_NAME}.c APPEND_STRING PROPERTY COMPILE_FLAGS "-mavx512f -mfma")
+@@ -363,7 +363,7 @@ if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64" AND NOT 
+   add_custom_command(OUTPUT ${TARGET_NAME}.c PRE_BUILD
+     COMMAND awk -v MAX_VREG_SIZE=512 -v TARGET=X8664 -f ${LIBPGMATH_TOOLS_DIR}/mth_z2yy.awk > ${TARGET_NAME}.c)
+   add_custom_target(${TARGET_NAME} ALL DEPENDS "${TARGET_NAME}.c")
+-  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
++  if(${CMAKE_SYSTEM_NAME} MATCHES "Linux|FreeBSD")
+     set_property(SOURCE ${TARGET_NAME}.c APPEND_STRING PROPERTY COMPILE_FLAGS "-mtune=knl -march=knl")
+   elseif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+     set_property(SOURCE ${TARGET_NAME}.c APPEND_STRING PROPERTY COMPILE_FLAGS "-mavx512f -mfma")