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authorYann Sionneau <ysionneau@kalray.eu>2020-10-02 16:24:55 +0200
committerWaldemar Brodkorb <wbx@openadk.org>2020-10-02 19:10:36 +0200
commit672a303852353ba9299f6f50190fca8b3abe4c1d (patch)
treef204ea8dc0b5a3e4b2bd4251b8daf5f0783ae260 /libm/kvx/feupdateenv.c
parent4acf6f072cbc255b0b0d6cfd598a100f95d84f2a (diff)
kvx: add support for kvx arch to uClibc-ng
This commit adds support for Kalray VLIW family (kvx) Kalray kv3 core is embedded in Kalray Coolidge SoC. This core which is the third of the KV family has the following features: 32/64 bits execution mode 6-issue VLIW architecture 64 x 64bits general purpose registers SIMD instructions little-endian In order to build a usable toolchain, build scripts are provided at the following address: https://github.com/kalray/build-scripts. Kalray uses FOSS which is available at https://github.com/kalray This includes Linux kernel, uClibc-ng, gcc, binutils, etc. Signed-off-by: Clément Léger <cleger@kalray.eu> Signed-off-by: Guillaume Thouvenin <gthouvenin@kalray.eu> Signed-off-by: Laurent Thevenoux <lthevenoux@kalray.eu> Signed-off-by: Marc Poulhies <mpoulhies@kalray.eu> Signed-off-by: Marius Gligor <mgligor@kalray.eu> Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
Diffstat (limited to 'libm/kvx/feupdateenv.c')
-rw-r--r--libm/kvx/feupdateenv.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/libm/kvx/feupdateenv.c b/libm/kvx/feupdateenv.c
new file mode 100644
index 000000000..f64510308
--- /dev/null
+++ b/libm/kvx/feupdateenv.c
@@ -0,0 +1,24 @@
+/*
+ (C) Copyright 2019 Kalray S.A.
+ This file provides feupdateenv for the Coolidge processor.
+*/
+
+#include <fenv.h>
+
+int feupdateenv(const fenv_t *envp)
+{
+ /* Mask *envp to be sure only valid bits are set */
+ fenv_t fe = *envp;
+ fe &= (FE_ALL_EXCEPT|FE_RND_MASK);
+
+ /* Update exception flags and rounding mode bit-fields of $cs, with
+ 'fe' as a set mask and FE_RND_MASK as a clear mask. FE_ALL_EXCEPT
+ is not cleared: restores rounding mode and updates exception
+ flags. */
+ __builtin_kvx_wfxl(KVX_SFR_CS, ((long long)fe << 32) | FE_RND_MASK);
+
+ /* The above insn cannot fail (while the OS allows access to the
+ floating-point exception flags of the $cs register). Return
+ success. */
+ return 0;
+}