diff options
Diffstat (limited to 'sysdeps/m68k/m680x0/fpu/mathimpl.h')
| -rw-r--r-- | sysdeps/m68k/m680x0/fpu/mathimpl.h | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/sysdeps/m68k/m680x0/fpu/mathimpl.h b/sysdeps/m68k/m680x0/fpu/mathimpl.h index 245fe7b2e3..b4df24043c 100644 --- a/sysdeps/m68k/m680x0/fpu/mathimpl.h +++ b/sysdeps/m68k/m680x0/fpu/mathimpl.h @@ -17,9 +17,231 @@ License along with the GNU C Library. If not, see <https://www.gnu.org/licenses/>. */ +#ifndef _MATHIMPL_H +#define _MATHIMPL_H + /* This file contains the definitions of the inline math functions that are only used internally inside libm, not visible to the user. */ +#define __MATH_INLINE __extern_inline + +/* This is used when defining the functions themselves. Define them with + __ names, and with `static inline' instead of `extern inline' so the + bodies will always be used, never an external function call. + Note: GCC 6 objects to __attribute__ ((__leaf__)) on static functions. */ +#define __m81_u(x) __CONCAT(__,x) +#define __m81_inline static __inline +#define __m81_nth(fn) __NTH (fn) + +/* Define a math function. */ +#define __m81_defun(rettype, func, args, attrs) \ + __m81_inline rettype attrs \ + __m81_nth (__m81_u(func) args) + +/* Define the three variants of a math function that has a direct + implementation in the m68k fpu. FUNC is the name for C (which will be + suffixed with f and l for the float and long double version, resp). OP + is the name of the fpu operation (without leading f). */ + +# define __inline_mathop(func, op, attrs) \ + __inline_mathop1(double, func, op, attrs) \ + __inline_mathop1(float, __CONCAT(func,f), op, attrs) \ + __inline_mathop1(long double, __CONCAT(func,l), op, attrs) + +#define __inline_mathop1(float_type,func, op, attrs) \ + __m81_defun (float_type, func, (float_type __mathop_x), attrs) \ + { \ + float_type __result; \ + __asm __volatile__ ("f" __STRING(op) "%.x %1, %0" \ + : "=f" (__result) : "f" (__mathop_x)); \ + return __result; \ + } + +__inline_mathop(__atan, atan,) +__inline_mathop(__cos, cos,) +__inline_mathop(__sin, sin,) +__inline_mathop(__tan, tan,) +__inline_mathop(__tanh, tanh,) +__inline_mathop(__fabs, abs, __attribute__ ((__const__))) + +__inline_mathop(__rint, int,) +__inline_mathop(__expm1, etoxm1,) +__inline_mathop(__log1p, lognp1,) + +__inline_mathop(__significand, getman,) + +__inline_mathop(__trunc, intrz, __attribute__ ((__const__))) + + +/* This macro contains the definition for the rest of the inline + functions, using FLOAT_TYPE as the domain type and M as a macro + that adds the suffix for the function names. */ + +#define __inline_functions(float_type, m) \ +__m81_defun (float_type, m(__floor), (float_type __x), \ + __attribute__ ((__const__))) \ +{ \ + float_type __result; \ + unsigned long int __ctrl_reg; \ + __asm __volatile__ ("fmove%.l %!, %0" : "=dm" (__ctrl_reg)); \ + /* Set rounding towards negative infinity. */ \ + __asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \ + : "dmi" ((__ctrl_reg & ~0x10) | 0x20)); \ + /* Convert X to an integer, using -Inf rounding. */ \ + __asm __volatile__ ("fint%.x %1, %0" : "=f" (__result) : "f" (__x)); \ + /* Restore the previous rounding mode. */ \ + __asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \ + : "dmi" (__ctrl_reg)); \ + return __result; \ +} \ + \ +__m81_defun (float_type, m(__ceil), (float_type __x), \ + __attribute__ ((__const__))) \ +{ \ + float_type __result; \ + unsigned long int __ctrl_reg; \ + __asm __volatile__ ("fmove%.l %!, %0" : "=dm" (__ctrl_reg)); \ + /* Set rounding towards positive infinity. */ \ + __asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \ + : "dmi" (__ctrl_reg | 0x30)); \ + /* Convert X to an integer, using +Inf rounding. */ \ + __asm __volatile__ ("fint%.x %1, %0" : "=f" (__result) : "f" (__x)); \ + /* Restore the previous rounding mode. */ \ + __asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \ + : "dmi" (__ctrl_reg)); \ + return __result; \ +} + +#define __CONCAT_d(arg) arg +#define __CONCAT_f(arg) arg ## f +#define __CONCAT_l(arg) arg ## l +__inline_functions(double, __CONCAT_d) +__inline_functions(float, __CONCAT_f) +__inline_functions(long double, __CONCAT_l) +#undef __inline_functions + +# define __inline_functions(float_type, m) \ +__m81_defun (int, m(__isinf), (float_type __value), \ + __attribute__ ((__const__))) \ +{ \ + /* There is no branch-condition for infinity, \ + so we must extract and examine the condition codes manually. */ \ + unsigned long int __fpsr; \ + __asm ("ftst%.x %1\n" \ + "fmove%.l %/fpsr, %0" : "=dm" (__fpsr) : "f" (__value)); \ + return (__fpsr & (2 << 24)) ? (__fpsr & (8 << 24) ? -1 : 1) : 0; \ +} \ + \ +__m81_defun (int, m(__finite), (float_type __value), \ + __attribute__ ((__const__))) \ +{ \ + /* There is no branch-condition for infinity, so we must extract and \ + examine the condition codes manually. */ \ + unsigned long int __fpsr; \ + __asm ("ftst%.x %1\n" \ + "fmove%.l %/fpsr, %0" : "=dm" (__fpsr) : "f" (__value)); \ + return (__fpsr & (3 << 24)) == 0; \ +} \ + \ +__m81_defun (float_type, m(__scalbn), \ + (float_type __x, int __n),) \ +{ \ + float_type __result; \ + __asm __volatile__ ("fscale%.l %1, %0" : "=f" (__result) \ + : "dmi" (__n), "0" (__x)); \ + return __result; \ +} + +__inline_functions(double, __CONCAT_d) +__inline_functions(float, __CONCAT_f) +__inline_functions(long double, __CONCAT_l) +#undef __inline_functions + +# define __inline_functions(float_type, m) \ +__m81_defun (int, m(__isnan), (float_type __value), \ + __attribute__ ((__const__))) \ +{ \ + char __result; \ + __asm ("ftst%.x %1\n" \ + "fsun %0" : "=dm" (__result) : "f" (__value)); \ + return __result; \ +} + +__inline_functions(double, __CONCAT_d) +__inline_functions(float, __CONCAT_f) +__inline_functions(long double, __CONCAT_l) +#undef __inline_functions + +# define __inline_functions(float_type, m) \ +__m81_defun (float_type, m(__scalbln), \ + (float_type __x, long int __n),) \ +{ \ + return m(__scalbn) (__x, __n); \ +} \ + \ +__m81_defun (float_type, m(__nearbyint), (float_type __x),) \ +{ \ + float_type __result; \ + unsigned long int __ctrl_reg; \ + __asm __volatile__ ("fmove%.l %!, %0" : "=dm" (__ctrl_reg)); \ + /* Temporarily disable the inexact exception. */ \ + __asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \ + : "dmi" (__ctrl_reg & ~0x200)); \ + __asm __volatile__ ("fint%.x %1, %0" : "=f" (__result) : "f" (__x)); \ + __asm __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \ + : "dmi" (__ctrl_reg)); \ + return __result; \ +} \ + \ +__m81_defun (long int, m(__lrint), (float_type __x),) \ +{ \ + long int __result; \ + __asm __volatile__ ("fmove%.l %1, %0" : "=dm" (__result) : "f" (__x)); \ + return __result; \ +} + +__inline_functions (double, __CONCAT_d) +__inline_functions (float, __CONCAT_f) +__inline_functions (long double, __CONCAT_l) +#undef __inline_functions + +#define __inline_functions(float_type, m) \ +__m81_inline void \ +__m81_nth (__m81_u(m(__sincos)) \ + (float_type __x, float_type *__sinx, float_type *__cosx)) \ +{ \ + __asm __volatile__ ("fsincos%.x %2,%1:%0" \ + : "=f" (*__sinx), "=f" (*__cosx) : "f" (__x)); \ +} + +__inline_functions (double, __CONCAT_d) +__inline_functions (float, __CONCAT_f) +__inline_functions (long double, __CONCAT_l) +#undef __inline_functions + +#undef __CONCAT_d +#undef __CONCAT_f +#undef __CONCAT_l + +/* Define the three variants of a math function that has a direct + implementation in the m68k fpu. FUNC is the name for C (which will be + suffixed with f and l for the float and long double version, resp). OP + is the name of the fpu operation (without leading f). */ + +#define __inline_mathop(func, op, attrs) \ + __inline_mathop1(double, func, op, attrs) \ + __inline_mathop1(float, __CONCAT(func,f), op, attrs) \ + __inline_mathop1(long double, __CONCAT(func,l), op, attrs) + +#define __inline_mathop1(float_type,func, op, attrs) \ + __m81_defun (float_type, func, (float_type __mathop_x), attrs) \ + { \ + float_type __result; \ + __asm __volatile__ ("f" __STRING(op) "%.x %1, %0" \ + : "=f" (__result) : "f" (__mathop_x)); \ + return __result; \ + } + __inline_mathop (__ieee754_acos, acos,) __inline_mathop (__ieee754_asin, asin,) __inline_mathop (__ieee754_cosh, cosh,) @@ -91,3 +313,5 @@ __m81_test (long double __val) #define __M81_COND_INF (2 << 24) #define __M81_COND_ZERO (4 << 24) #define __M81_COND_NEG (8 << 24) + +#endif /* _MATHIMPL_H */ |