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Use uint32_t sign argument to math error functions 

This change is equivalent to the commit
c65db17340
and only affects code that is from the Arm optimized-routines project.

It does not affect the observable behaviour, but the code generation
can be different on 64bit targets.  The intention is to make the
portable semantics of the code obvious by using a fixed size type.
This commit is contained in:
Szabolcs Nagy 2018-06-25 17:39:27 +01:00 committed by Corinna Vinschen
parent 6497fdfaf4
commit cfbcbd1c95
3 changed files with 13 additions and 13 deletions
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8
newlib/libm/common/math_config.h
View File

@ -199,10 +199,10 @@ eval_as_double (double x)
# define unlikely(x) (x) # define unlikely(x) (x)
#endif #endif
HIDDEN float __math_oflowf (unsigned long); HIDDEN float __math_oflowf (uint32_t);
HIDDEN float __math_uflowf (unsigned long); HIDDEN float __math_uflowf (uint32_t);
HIDDEN float __math_may_uflowf (unsigned long); HIDDEN float __math_may_uflowf (uint32_t);
HIDDEN float __math_divzerof (unsigned long); HIDDEN float __math_divzerof (uint32_t);
HIDDEN float __math_invalidf (float); HIDDEN float __math_invalidf (float);
/* Shared between expf, exp2f and powf. */ /* Shared between expf, exp2f and powf. */

12
newlib/libm/common/math_errf.c
View File

@ -1,5 +1,5 @@
/* Single-precision math error handling. /* Single-precision math error handling.
Copyright (c) 2017 ARM Ltd. All rights reserved. Copyright (c) 2017-2018 ARM Ltd. All rights reserved.
Redistribution and use in source and binary forms, with or without Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions modification, are permitted provided that the following conditions
@ -45,14 +45,14 @@ with_errnof (float y, int e)
/* NOINLINE prevents fenv semantics breaking optimizations. */ /* NOINLINE prevents fenv semantics breaking optimizations. */
NOINLINE static float NOINLINE static float
xflowf (unsigned long sign, float y) xflowf (uint32_t sign, float y)
{ {
y = (sign ? -y : y) * y; y = (sign ? -y : y) * y;
return with_errnof (y, ERANGE); return with_errnof (y, ERANGE);
} }
HIDDEN float HIDDEN float
__math_uflowf (unsigned long sign) __math_uflowf (uint32_t sign)
{ {
return xflowf (sign, 0x1p-95f); return xflowf (sign, 0x1p-95f);
} }
@ -61,20 +61,20 @@ __math_uflowf (unsigned long sign)
/* Underflows to zero in some non-nearest rounding mode, setting errno /* 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. */ is valid even if the result is non-zero, but in the subnormal range. */
HIDDEN float HIDDEN float
__math_may_uflowf (unsigned long sign) __math_may_uflowf (uint32_t sign)
{ {
return xflowf (sign, 0x1.4p-75f); return xflowf (sign, 0x1.4p-75f);
} }
#endif #endif
HIDDEN float HIDDEN float
__math_oflowf (unsigned long sign) __math_oflowf (uint32_t sign)
{ {
return xflowf (sign, 0x1p97f); return xflowf (sign, 0x1p97f);
} }
HIDDEN float HIDDEN float
__math_divzerof (unsigned long sign) __math_divzerof (uint32_t sign)
{ {
float y = 0; float y = 0;
return with_errnof ((sign ? -1 : 1) / y, ERANGE); return with_errnof ((sign ? -1 : 1) / y, ERANGE);

6
newlib/libm/common/sf_pow.c
View File

@ -1,5 +1,5 @@
/* Single-precision pow function. /* Single-precision pow function.
Copyright (c) 2017 ARM Ltd. All rights reserved. Copyright (c) 2017-2018 ARM Ltd. All rights reserved.
Redistribution and use in source and binary forms, with or without Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions modification, are permitted provided that the following conditions
@ -93,7 +93,7 @@ log2_inline (uint32_t ix)
(in case of fast toint intrinsics) or not. The unscaled xd must be (in case of fast toint intrinsics) or not. The unscaled xd must be
in [-1021,1023], sign_bias sets the sign of the result. */ in [-1021,1023], sign_bias sets the sign of the result. */
static inline double_t 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; uint64_t ki, ski, t;
/* double_t for better performance on targets with FLT_EVAL_METHOD==2. */ /* double_t for better performance on targets with FLT_EVAL_METHOD==2. */
@ -152,7 +152,7 @@ zeroinfnan (uint32_t ix)
float float
powf (float x, float y) powf (float x, float y)
{ {
unsigned long sign_bias = 0; uint32_t sign_bias = 0;
uint32_t ix, iy; uint32_t ix, iy;
ix = asuint (x); ix = asuint (x);