[libc] Re-Enable GPU tests and fix math exception handling (#83172)

Summary:
A lot of these tests failed previously and were disabled. However we
have fixed some things since then and many of these seem to pass.
Additionally, the last remaining math tests that failed seemed to be due
to the exception handling. For now we just set it to be 'errno'.

These pass locally when tested on a gfx1030, gfx90a, and sm_89
architecture. Hopefully these pass correctly on the sm_60 bot as I've
had things fail on that one only before.

Author: jhuber6

libc/include/llvm-libc-macros/math-macros.h

@@ -32,6 +32,8 @@
 #define math_errhandling 0
 #elif defined(__NO_MATH_ERRNO__)
 #define math_errhandling (MATH_ERREXCEPT)
+#elif defined(__NVPTX__) || defined(__AMDGPU__)
+#define math_errhandling (MATH_ERRNO)
 #else
 #define math_errhandling (MATH_ERRNO | MATH_ERREXCEPT)
 #endif

libc/test/src/__support/CMakeLists.txt

@@ -1,17 +1,14 @@
 add_custom_target(libc-support-tests)
 
-# FIXME: These tests are currently broken on the GPU.
-if(NOT LIBC_TARGET_OS_IS_GPU)
-  add_libc_test(
-    blockstore_test
-    SUITE
-      libc-support-tests
-    SRCS
-      blockstore_test.cpp
-    DEPENDS
-      libc.src.__support.blockstore
-  )
-endif()
+add_libc_test(
+  blockstore_test
+  SUITE
+    libc-support-tests
+  SRCS
+    blockstore_test.cpp
+  DEPENDS
+    libc.src.__support.blockstore
+)
 
 add_libc_test(
   endian_test
@@ -42,8 +39,6 @@ add_libc_test(
   DEPENDS
     libc.src.__support.high_precision_decimal
     libc.src.__support.uint128
-  # FIXME Test segfaults on gfx90a GPU
-  UNIT_TEST_ONLY
 )
 
 add_libc_test(

libc/test/src/math/CMakeLists.txt

@@ -758,40 +758,37 @@ add_fp_unittest(
     libc.src.__support.FPUtil.basic_operations
 )
 
-# FIXME: These tests are currently broken for NVPTX.
-if(NOT LIBC_TARGET_ARCHITECTURE_IS_NVPTX)
-  add_fp_unittest(
-    ilogb_test
-    SUITE
-      libc-math-unittests
-    SRCS
-      ilogb_test.cpp
-    HDRS
-      ILogbTest.h
-    DEPENDS
-      libc.include.math
-      libc.src.math.ilogb
-      libc.src.__support.CPP.limits
-      libc.src.__support.FPUtil.fp_bits
-      libc.src.__support.FPUtil.manipulation_functions
-  )
+add_fp_unittest(
+  ilogb_test
+  SUITE
+    libc-math-unittests
+  SRCS
+    ilogb_test.cpp
+  HDRS
+    ILogbTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.ilogb
+    libc.src.__support.CPP.limits
+    libc.src.__support.FPUtil.fp_bits
+    libc.src.__support.FPUtil.manipulation_functions
+)
 
-  add_fp_unittest(
-    ilogbf_test
-    SUITE
-      libc-math-unittests
-    SRCS
-      ilogbf_test.cpp
-    HDRS
-      ILogbTest.h
-    DEPENDS
-      libc.include.math
-      libc.src.math.ilogbf
-      libc.src.__support.CPP.limits
-      libc.src.__support.FPUtil.fp_bits
-      libc.src.__support.FPUtil.manipulation_functions
-  )
-endif()
+add_fp_unittest(
+  ilogbf_test
+  SUITE
+    libc-math-unittests
+  SRCS
+    ilogbf_test.cpp
+  HDRS
+    ILogbTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.ilogbf
+    libc.src.__support.CPP.limits
+    libc.src.__support.FPUtil.fp_bits
+    libc.src.__support.FPUtil.manipulation_functions
+)
 
 add_fp_unittest(
   ilogbl_test
@@ -989,92 +986,89 @@ add_fp_unittest(
     libc.src.__support.FPUtil.fp_bits
 )
 
-# FIXME: These tests are currently broken on the GPU.
-if(NOT LIBC_TARGET_OS_IS_GPU)
-  add_fp_unittest(
-    fminf_test
-    SUITE
-      libc-math-unittests
-    SRCS
-      fminf_test.cpp
-    HDRS
-      FMinTest.h
-    DEPENDS
-      libc.include.math
-      libc.src.math.fminf
-      libc.src.__support.FPUtil.fp_bits
-  )
+add_fp_unittest(
+  fminf_test
+  SUITE
+    libc-math-unittests
+  SRCS
+    fminf_test.cpp
+  HDRS
+    FMinTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.fminf
+    libc.src.__support.FPUtil.fp_bits
+)
 
-  add_fp_unittest(
-    fmin_test
-    SUITE
-      libc-math-unittests
-    SRCS
-      fmin_test.cpp
-    HDRS
-      FMinTest.h
-    DEPENDS
-      libc.include.math
-      libc.src.math.fmin
-      libc.src.__support.FPUtil.fp_bits
-  )
+add_fp_unittest(
+  fmin_test
+  SUITE
+    libc-math-unittests
+  SRCS
+    fmin_test.cpp
+  HDRS
+    FMinTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.fmin
+    libc.src.__support.FPUtil.fp_bits
+)
 
-  add_fp_unittest(
-    fminl_test
-    SUITE
-      libc-math-unittests
-    SRCS
-      fminl_test.cpp
-    HDRS
-      FMinTest.h
-    DEPENDS
-      libc.include.math
-      libc.src.math.fminl
-      libc.src.__support.FPUtil.fp_bits
-  )
+add_fp_unittest(
+  fminl_test
+  SUITE
+    libc-math-unittests
+  SRCS
+    fminl_test.cpp
+  HDRS
+    FMinTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.fminl
+    libc.src.__support.FPUtil.fp_bits
+)
 
-  add_fp_unittest(
-    fmaxf_test
-    SUITE
-      libc-math-unittests
-    SRCS
-      fmaxf_test.cpp
-    HDRS
-      FMaxTest.h
-    DEPENDS
-      libc.include.math
-      libc.src.math.fmaxf
-      libc.src.__support.FPUtil.fp_bits
-  )
+add_fp_unittest(
+  fmaxf_test
+  SUITE
+    libc-math-unittests
+  SRCS
+    fmaxf_test.cpp
+  HDRS
+    FMaxTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.fmaxf
+    libc.src.__support.FPUtil.fp_bits
+)
 
-  add_fp_unittest(
-    fmax_test
-    SUITE
-      libc-math-unittests
-    SRCS
-      fmax_test.cpp
-    HDRS
-      FMaxTest.h
-    DEPENDS
-      libc.include.math
-      libc.src.math.fmax
-      libc.src.__support.FPUtil.fp_bits
-  )
+add_fp_unittest(
+  fmax_test
+  SUITE
+    libc-math-unittests
+  SRCS
+    fmax_test.cpp
+  HDRS
+    FMaxTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.fmax
+    libc.src.__support.FPUtil.fp_bits
+)
 
-  add_fp_unittest(
-    fmaxl_test
-    SUITE
-      libc-math-unittests
-    SRCS
-      fmaxl_test.cpp
-    HDRS
-      FMaxTest.h
-    DEPENDS
-      libc.include.math
-      libc.src.math.fmaxl
-      libc.src.__support.FPUtil.fp_bits
-  )
-endif()
+add_fp_unittest(
+  fmaxl_test
+  SUITE
+    libc-math-unittests
+  SRCS
+    fmaxl_test.cpp
+  HDRS
+    FMaxTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.fmaxl
+    libc.src.__support.FPUtil.fp_bits
+)
 
 add_fp_unittest(
   sqrtf_test
@@ -1234,38 +1228,35 @@ add_fp_unittest(
     libc.src.__support.FPUtil.fp_bits
 )
 
-# FIXME: These tests are currently spurious for NVPTX.
-if(NOT LIBC_TARGET_ARCHITECTURE_IS_NVPTX)
-  add_fp_unittest(
-    nextafter_test
-    SUITE
-      libc-math-unittests
-    SRCS
-      nextafter_test.cpp
-    HDRS
-      NextAfterTest.h
-    DEPENDS
-      libc.include.math
-      libc.src.math.nextafter
-      libc.src.__support.FPUtil.basic_operations
-      libc.src.__support.FPUtil.fp_bits
-  )
+add_fp_unittest(
+  nextafter_test
+  SUITE
+    libc-math-unittests
+  SRCS
+    nextafter_test.cpp
+  HDRS
+    NextAfterTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.nextafter
+    libc.src.__support.FPUtil.basic_operations
+    libc.src.__support.FPUtil.fp_bits
+)
 
-  add_fp_unittest(
-    nextafterf_test
-    SUITE
-      libc-math-unittests
-    SRCS
-      nextafterf_test.cpp
-    HDRS
-      NextAfterTest.h
-    DEPENDS
-      libc.include.math
-      libc.src.math.nextafterf
-      libc.src.__support.FPUtil.basic_operations
-      libc.src.__support.FPUtil.fp_bits
-  )
-endif()
+add_fp_unittest(
+  nextafterf_test
+  SUITE
+    libc-math-unittests
+  SRCS
+    nextafterf_test.cpp
+  HDRS
+    NextAfterTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.nextafterf
+    libc.src.__support.FPUtil.basic_operations
+    libc.src.__support.FPUtil.fp_bits
+)
 
 add_fp_unittest(
   nextafterl_test