diff options
| author | Denis Vlasenko <vda.linux@googlemail.com> | 2009-02-08 02:04:10 +0000 |
|---|---|---|
| committer | Denis Vlasenko <vda.linux@googlemail.com> | 2009-02-08 02:04:10 +0000 |
| commit | 7cccb9c2531088502492d92e8632159653de6290 (patch) | |
| tree | 7e34bb6d1956204501b511c2532fd552cf407df2 /libm/s_nextafterf.c | |
| parent | 49173d980edd36861fdb00830b8b63d9297327e6 (diff) | |
nextafterf: trying to correct FP exception handling
Diffstat (limited to 'libm/s_nextafterf.c')
| -rw-r--r-- | libm/s_nextafterf.c | 15 |
1 files changed, 4 insertions, 11 deletions
diff --git a/libm/s_nextafterf.c b/libm/s_nextafterf.c index 8dee00ff7..5fc44e31c 100644 --- a/libm/s_nextafterf.c +++ b/libm/s_nextafterf.c @@ -16,11 +16,6 @@ #include "math.h" #include "math_private.h" -#ifndef math_opt_barrier -# define math_opt_barrier(x) ({ __typeof (x) __x = x; __asm ("" : "+m" (__x)); __x; }) -# define math_force_eval(x) __asm __volatile ("" : : "m" (x)) -#endif - float nextafterf(float x, float y) { int32_t hx, hy, ix, iy; @@ -38,12 +33,12 @@ float nextafterf(float x, float y) return y; if (ix == 0) { /* x == 0? */ - float u; +// glibc 2.4 does not seem to set underflow? +// float u; /* return +-minsubnormal */ SET_FLOAT_WORD(x, (hy & 0x80000000) | 1); - u = math_opt_barrier(x); - u = u * u; - math_force_eval(u); /* raise underflow flag */ +// u = x * x; /* raise underflow flag */ +// math_force_eval(u); return x; } @@ -63,8 +58,6 @@ float nextafterf(float x, float y) hy = hx & 0x7f800000; if (hy >= 0x7f800000) { x = x + x; /* overflow */ -//?? if (FLT_EVAL_METHOD != 0) -// asm ("" : "+m"(x)); return x; /* overflow */ } if (hy < 0x00800000) { |