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-rw-r--r--libm/kvx/fesetround.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/libm/kvx/fesetround.c b/libm/kvx/fesetround.c
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+++ b/libm/kvx/fesetround.c
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+/*
+ (C) Copyright 2019 Kalray S.A.
+ This file provides fesetround for the Coolidge processor.
+*/
+
+#include <fenv.h>
+
+int fesetround(int rounding_mode)
+{
+ /* Mask round to be sure only valid rounding bits are set */
+ rounding_mode &= FE_RND_MASK;
+
+ /* Set rounding mode bit-fields of $cs, with 'rounding_mode' as a
+ set mask and FE_RND_MASK as a clear mask. */
+ __builtin_kvx_wfxl(KVX_SFR_CS, ((long long)rounding_mode << 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;
+}