From: Vineet Gupta <Vineet.Gupta1@synopsys.com>
To: libc-alpha@sourceware.org
Cc: linux-snps-arc@lists.infradead.org,
Adhemerval Zanella <adhemerval.zanella@linaro.org>,
Vineet Gupta <Vineet.Gupta1@synopsys.com>
Subject: [PATCH 2/5] iee754: prvoide gcc builtins based generic sqrt functions
Date: Fri, 29 May 2020 19:00:44 -0700 [thread overview]
Message-ID: <20200530020047.5490-3-vgupta@synopsys.com> (raw)
In-Reply-To: <20200530020047.5490-1-vgupta@synopsys.com>
---
sysdeps/generic/math-use-builtins.h | 3 +++
sysdeps/ieee754/dbl-64/e_sqrt.c | 6 ++++++
sysdeps/ieee754/flt-32/e_sqrtf.c | 6 ++++++
3 files changed, 15 insertions(+)
diff --git a/sysdeps/generic/math-use-builtins.h b/sysdeps/generic/math-use-builtins.h
index 8a39ef58bc95..fc724c824a17 100644
--- a/sysdeps/generic/math-use-builtins.h
+++ b/sysdeps/generic/math-use-builtins.h
@@ -60,4 +60,7 @@
# define USE_COPYSIGNF128_BUILTIN 0
#endif
+#define USE_SQRT_BUILTIN 0
+#define USE_SQRTF_BUILTIN 0
+
#endif /* math-use-builtins.h */
diff --git a/sysdeps/ieee754/dbl-64/e_sqrt.c b/sysdeps/ieee754/dbl-64/e_sqrt.c
index d42a1a4eb6e9..518a8ae5cdaf 100644
--- a/sysdeps/ieee754/dbl-64/e_sqrt.c
+++ b/sysdeps/ieee754/dbl-64/e_sqrt.c
@@ -41,6 +41,7 @@
#include <math_private.h>
#include <fenv_private.h>
#include <libm-alias-finite.h>
+#include <math-use-builtins.h>
/*********************************************************************/
/* An ultimate sqrt routine. Given an IEEE double machine number x */
@@ -50,6 +51,10 @@
double
__ieee754_sqrt (double x)
{
+#if USE_SQRT_BUILTIN
+ return __builtin_sqrt (x);
+#else
+ /* Use generic implementation. */
static const double
rt0 = 9.99999999859990725855365213134618E-01,
rt1 = 4.99999999495955425917856814202739E-01,
@@ -138,6 +143,7 @@ __ieee754_sqrt (double x)
return (x - x) / (x - x); /* sqrt(-ve)=sNaN */
return 0x1p-256 * __ieee754_sqrt (x * 0x1p512);
}
+#endif /* ! USE_SQRT_BUILTIN */
}
#ifndef __ieee754_sqrt
libm_alias_finite (__ieee754_sqrt, __sqrt)
diff --git a/sysdeps/ieee754/flt-32/e_sqrtf.c b/sysdeps/ieee754/flt-32/e_sqrtf.c
index b339444301aa..68fc80e1e1ee 100644
--- a/sysdeps/ieee754/flt-32/e_sqrtf.c
+++ b/sysdeps/ieee754/flt-32/e_sqrtf.c
@@ -16,12 +16,17 @@
#include <math.h>
#include <math_private.h>
#include <libm-alias-finite.h>
+#include <math-use-builtins.h>
static const float one = 1.0, tiny=1.0e-30;
float
__ieee754_sqrtf(float x)
{
+#if USE_SQRTF_BUILTIN
+ return __builtin_sqrtf (x);
+#else
+ /* Use generic implementation. */
float z;
int32_t sign = (int)0x80000000;
int32_t ix,s,q,m,t,i;
@@ -83,6 +88,7 @@ __ieee754_sqrtf(float x)
ix += (m <<23);
SET_FLOAT_WORD(z,ix);
return z;
+#endif /* ! USE_SQRTF_BUILTIN */
}
#ifndef __ieee754_sqrtf
libm_alias_finite (__ieee754_sqrtf, __sqrtf)
--
2.20.1
next prev parent reply other threads:[~2020-05-30 2:00 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-30 2:00 [PATCH 0/5] use gcc builtins for sqrt and fma functions Vineet Gupta
2020-05-30 2:00 ` [PATCH 1/5] ARC/dl-runtime helper macros Vineet Gupta
2020-05-30 2:17 ` Vineet Gupta
2020-05-30 2:00 ` Vineet Gupta [this message]
2020-06-01 14:13 ` [PATCH 2/5] iee754: prvoide gcc builtins based generic sqrt functions Adhemerval Zanella
2020-06-01 14:42 ` Adhemerval Zanella
2020-06-01 18:12 ` Vineet Gupta
2020-06-01 18:32 ` Adhemerval Zanella
2020-06-01 14:18 ` Florian Weimer
2020-06-01 18:12 ` Vineet Gupta
2020-05-30 2:00 ` [PATCH 3/5] iee754: prvoide gcc builtins based generic fma functions Vineet Gupta
2020-06-01 14:20 ` Adhemerval Zanella
2020-06-01 16:13 ` Florian Weimer
2020-05-30 2:00 ` [PATCH 4/5] aarch/fpu: use generic sqrt, " Vineet Gupta
2020-06-01 16:38 ` Adhemerval Zanella
2020-06-01 21:44 ` Vineet Gupta
2020-06-01 22:08 ` Ramana Radhakrishnan
2020-06-02 18:12 ` Joseph Myers
2020-05-30 2:00 ` [PATCH 5/5] powerpc/fpu: use generic " Vineet Gupta
2020-06-01 17:10 ` Adhemerval Zanella
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