[libc-commits] [libc] [libc] Use intermediate float operations on the GPU (PR #155869)

[Joseph Huber via libc-commits]

https://github.com/jhuber6 created https://github.com/llvm/llvm-project/pull/155869

Summary:
Move the GPU config to the common directory instead of copying it and
enable the intermediate float option in the math library.


>From f7878718bcfac9000b559a7b269ee67f61445bb4 Mon Sep 17 00:00:00 2001
From: Joseph Huber <huberjn at outlook.com>
Date: Thu, 28 Aug 2025 10:53:13 -0500
Subject: [PATCH] [libc] Use intermediate float operations on the GPU

Summary:
Move the GPU config to the common directory instead of copying it and
enable the intermediate float option in the math library.
---
 libc/config/gpu/{amdgpu => }/config.json |  2 +-
 libc/config/gpu/nvptx/config.json        | 45 ------------------------
 2 files changed, 1 insertion(+), 46 deletions(-)
 rename libc/config/gpu/{amdgpu => }/config.json (84%)
 delete mode 100644 libc/config/gpu/nvptx/config.json

diff --git a/libc/config/gpu/amdgpu/config.json b/libc/config/gpu/config.json
similarity index 84%
rename from libc/config/gpu/amdgpu/config.json
rename to libc/config/gpu/config.json
index fa179b849dcf7..434ee042953eb 100644
--- a/libc/config/gpu/amdgpu/config.json
+++ b/libc/config/gpu/config.json
@@ -39,7 +39,7 @@
   },
   "math": {
     "LIBC_CONF_MATH_OPTIMIZATIONS": {
-      "value": "(LIBC_MATH_SKIP_ACCURATE_PASS | LIBC_MATH_SMALL_TABLES | LIBC_MATH_NO_ERRNO | LIBC_MATH_NO_EXCEPT)"
+      "value": "(LIBC_MATH_SKIP_ACCURATE_PASS | LIBC_MATH_INTERMEDIATE_COMP_IN_FLOAT | LIBC_MATH_SMALL_TABLES | LIBC_MATH_NO_ERRNO | LIBC_MATH_NO_EXCEPT)"
     }
   }
 }
diff --git a/libc/config/gpu/nvptx/config.json b/libc/config/gpu/nvptx/config.json
deleted file mode 100644
index fa179b849dcf7..0000000000000
--- a/libc/config/gpu/nvptx/config.json
+++ /dev/null
@@ -1,45 +0,0 @@
-{
-  "errno": {
-    "LIBC_CONF_ERRNO_MODE": {
-      "value": "LIBC_ERRNO_MODE_SHARED"
-    }
-  },
-  "threads": {
-    "LIBC_CONF_THREAD_MODE": {
-      "value": "LIBC_THREAD_MODE_SINGLE"
-    }
-  },
-  "printf": {
-    "LIBC_CONF_PRINTF_DISABLE_FLOAT": {
-      "value": true
-    },
-    "LIBC_CONF_PRINTF_DISABLE_INDEX_MODE": {
-      "value": true
-    },
-    "LIBC_CONF_PRINTF_DISABLE_WRITE_INT": {
-      "value": true
-    },
-    "LIBC_CONF_PRINTF_FLOAT_TO_STR_USE_MEGA_LONG_DOUBLE_TABLE": {
-      "value": false
-    },
-    "LIBC_CONF_PRINTF_DISABLE_STRERROR": {
-      "value": true
-    },
-    "LIBC_CONF_PRINTF_RUNTIME_DISPATCH": {
-      "value": false
-    }
-  },
-  "scanf": {
-    "LIBC_CONF_SCANF_DISABLE_FLOAT": {
-      "value": true
-    },
-    "LIBC_CONF_SCANF_DISABLE_INDEX_MODE": {
-      "value": true
-    }
-  },
-  "math": {
-    "LIBC_CONF_MATH_OPTIMIZATIONS": {
-      "value": "(LIBC_MATH_SKIP_ACCURATE_PASS | LIBC_MATH_SMALL_TABLES | LIBC_MATH_NO_ERRNO | LIBC_MATH_NO_EXCEPT)"
-    }
-  }
-}