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authorSzabolcs Nagy <szabolcs.nagy@arm.com>2018-06-13 15:07:21 +0100
committerSzabolcs Nagy <szabolcs.nagy@arm.com>2018-07-02 09:29:04 +0100
commit2b445206a1a450af0e6e66d78652e1ffd80685e2 (patch)
tree9858d5428a8949fe5b580624cf6aa29c2e1fcf24
parent2827ab990aefbb0e53374199b875d98f116d6390 (diff)
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Use uint32_t sign in single precision math error handling functions
Ideally sign should be bool, but sometimes (e.g. in powf) it's more efficient to pass a non-zero value than 1 to indicate that the sign should be set. The fixed size int is less ambigous than unsigned long. * sysdeps/ieee754/flt-32/e_powf.c (__powf): Use uint32_t. (exp2f_inline): Likewise. * sysdeps/ieee754/flt-32/math_config.h (__math_oflowf): Likewise. (__math_uflowf): Likewise. (__math_may_uflowf): Likewise. (__math_divzerof): Likewise. (__math_invalidf): Likewise. * sysdeps/ieee754/flt-32/math_errf.c (xflowf): Likewise. (__math_oflowf): Likewise. (__math_uflowf): Likewise. (__math_may_uflowf): Likewise. (__math_divzerof): Likewise. (__math_invalidf): Likewise.
-rw-r--r--ChangeLog16
-rw-r--r--sysdeps/ieee754/flt-32/e_powf.c4
-rw-r--r--sysdeps/ieee754/flt-32/math_config.h8
-rw-r--r--sysdeps/ieee754/flt-32/math_errf.c10
4 files changed, 27 insertions, 11 deletions
diff --git a/ChangeLog b/ChangeLog
index 3371a9b670..5054985310 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,19 @@
+2018-07-02 Szabolcs Nagy <szabolcs.nagy@arm.com>
+
+ * sysdeps/ieee754/flt-32/e_powf.c (__powf): Use uint32_t.
+ (exp2f_inline): Likewise.
+ * sysdeps/ieee754/flt-32/math_config.h (__math_oflowf): Likewise.
+ (__math_uflowf): Likewise.
+ (__math_may_uflowf): Likewise.
+ (__math_divzerof): Likewise.
+ (__math_invalidf): Likewise.
+ * sysdeps/ieee754/flt-32/math_errf.c (xflowf): Likewise.
+ (__math_oflowf): Likewise.
+ (__math_uflowf): Likewise.
+ (__math_may_uflowf): Likewise.
+ (__math_divzerof): Likewise.
+ (__math_invalidf): Likewise.
+
2018-06-29 DJ Delorie <dj@redhat.com>
Carlos O'Donell <carlos@redhat.com>
diff --git a/sysdeps/ieee754/flt-32/e_powf.c b/sysdeps/ieee754/flt-32/e_powf.c
index 90661e2216..ece83f0dd2 100644
--- a/sysdeps/ieee754/flt-32/e_powf.c
+++ b/sysdeps/ieee754/flt-32/e_powf.c
@@ -84,7 +84,7 @@ log2_inline (uint32_t ix)
(in case of fast toint intrinsics) or not. The unscaled xd must be
in [-1021,1023], sign_bias sets the sign of the result. */
static inline double_t
-exp2_inline (double_t xd, unsigned long sign_bias)
+exp2_inline (double_t xd, uint32_t sign_bias)
{
uint64_t ki, ski, t;
/* double_t for better performance on targets with FLT_EVAL_METHOD==2. */
@@ -143,7 +143,7 @@ zeroinfnan (uint32_t ix)
float
__powf (float x, float y)
{
- unsigned long sign_bias = 0;
+ uint32_t sign_bias = 0;
uint32_t ix, iy;
ix = asuint (x);
diff --git a/sysdeps/ieee754/flt-32/math_config.h b/sysdeps/ieee754/flt-32/math_config.h
index c4def9bbc1..9c4ef30173 100644
--- a/sysdeps/ieee754/flt-32/math_config.h
+++ b/sysdeps/ieee754/flt-32/math_config.h
@@ -102,10 +102,10 @@ issignalingf_inline (float x)
#define NOINLINE __attribute__ ((noinline))
-attribute_hidden float __math_oflowf (unsigned long);
-attribute_hidden float __math_uflowf (unsigned long);
-attribute_hidden float __math_may_uflowf (unsigned long);
-attribute_hidden float __math_divzerof (unsigned long);
+attribute_hidden float __math_oflowf (uint32_t);
+attribute_hidden float __math_uflowf (uint32_t);
+attribute_hidden float __math_may_uflowf (uint32_t);
+attribute_hidden float __math_divzerof (uint32_t);
attribute_hidden float __math_invalidf (float);
/* Shared between expf, exp2f and powf. */
diff --git a/sysdeps/ieee754/flt-32/math_errf.c b/sysdeps/ieee754/flt-32/math_errf.c
index 7d58c0b855..5bc7ac6ef5 100644
--- a/sysdeps/ieee754/flt-32/math_errf.c
+++ b/sysdeps/ieee754/flt-32/math_errf.c
@@ -33,14 +33,14 @@ with_errnof (float y, int e)
/* NOINLINE prevents fenv semantics breaking optimizations. */
NOINLINE static float
-xflowf (unsigned long sign, float y)
+xflowf (uint32_t sign, float y)
{
y = (sign ? -y : y) * y;
return with_errnof (y, ERANGE);
}
attribute_hidden float
-__math_uflowf (unsigned long sign)
+__math_uflowf (uint32_t sign)
{
return xflowf (sign, 0x1p-95f);
}
@@ -49,20 +49,20 @@ __math_uflowf (unsigned long sign)
/* Underflows to zero in some non-nearest rounding mode, setting errno
is valid even if the result is non-zero, but in the subnormal range. */
attribute_hidden float
-__math_may_uflowf (unsigned long sign)
+__math_may_uflowf (uint32_t sign)
{
return xflowf (sign, 0x1.4p-75f);
}
#endif
attribute_hidden float
-__math_oflowf (unsigned long sign)
+__math_oflowf (uint32_t sign)
{
return xflowf (sign, 0x1p97f);
}
attribute_hidden float
-__math_divzerof (unsigned long sign)
+__math_divzerof (uint32_t sign)
{
float y = 0;
return with_errnof ((sign ? -1 : 1) / y, ERANGE);