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| author | Szabolcs Nagy <nsz@port70.net> | 2012-11-14 01:01:38 +0100 |
|---|---|---|
| committer | Szabolcs Nagy <nsz@port70.net> | 2012-11-14 01:01:38 +0100 |
| commit | 45ff9d8eb6f43b8f612d1b01ada627f5b4447c45 (patch) | |
| tree | 92515e65ee6782a78ce4a1c97839872a14939155 /src/math/atan2l.c | |
| parent | 529a8de46cbf6cce525ab25c4532822006502f29 (diff) | |
| download | musl-45ff9d8eb6f43b8f612d1b01ada627f5b4447c45.tar.gz musl-45ff9d8eb6f43b8f612d1b01ada627f5b4447c45.tar.xz musl-45ff9d8eb6f43b8f612d1b01ada627f5b4447c45.zip | |
math: ld80 invtrig cleanups
keeping only commonly used data in invtrigl
Diffstat (limited to 'src/math/atan2l.c')
| -rw-r--r-- | src/math/atan2l.c | 32 |
1 files changed, 15 insertions, 17 deletions
diff --git a/src/math/atan2l.c b/src/math/atan2l.c index 0fc901c8..45cbfcc1 100644 --- a/src/math/atan2l.c +++ b/src/math/atan2l.c @@ -24,10 +24,8 @@ long double atan2l(long double y, long double x) } #elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384 #include "__invtrigl.h" -static const volatile long double -tiny = 1.0e-300; -static const long double -pi = 3.14159265358979323846264338327950280e+00L; +// FIXME: +static const volatile long double tiny = 1.0e-300; long double atan2l(long double y, long double x) { @@ -55,9 +53,9 @@ long double atan2l(long double y, long double x) if (expty==0 && ((uy.bits.manh&~LDBL_NBIT)|uy.bits.manl)==0) { switch(m) { case 0: - case 1: return y; /* atan(+-0,+anything)=+-0 */ - case 2: return pi+tiny; /* atan(+0,-anything) = pi */ - case 3: return -pi-tiny; /* atan(-0,-anything) =-pi */ + case 1: return y; /* atan(+-0,+anything)=+-0 */ + case 2: return pi_hi+tiny; /* atan(+0,-anything) = pi */ + case 3: return -pi_hi-tiny; /* atan(-0,-anything) =-pi */ } } /* when x = 0 */ @@ -69,15 +67,15 @@ long double atan2l(long double y, long double x) switch(m) { case 0: return pio2_hi*0.5+tiny; /* atan(+INF,+INF) */ case 1: return -pio2_hi*0.5-tiny; /* atan(-INF,+INF) */ - case 2: return 1.5*pio2_hi+tiny; /*atan(+INF,-INF)*/ - case 3: return -1.5*pio2_hi-tiny; /*atan(-INF,-INF)*/ + case 2: return 1.5*pio2_hi+tiny; /* atan(+INF,-INF) */ + case 3: return -1.5*pio2_hi-tiny; /* atan(-INF,-INF) */ } } else { switch(m) { - case 0: return 0.0; /* atan(+...,+INF) */ - case 1: return -0.0; /* atan(-...,+INF) */ - case 2: return pi+tiny; /* atan(+...,-INF) */ - case 3: return -pi-tiny; /* atan(-...,-INF) */ + case 0: return 0.0; /* atan(+...,+INF) */ + case 1: return -0.0; /* atan(-...,+INF) */ + case 2: return pi_hi+tiny; /* atan(+...,-INF) */ + case 3: return -pi_hi-tiny; /* atan(-...,-INF) */ } } } @@ -95,11 +93,11 @@ long double atan2l(long double y, long double x) else /* safe to do y/x */ z = atanl(fabsl(y/x)); switch (m) { - case 0: return z; /* atan(+,+) */ - case 1: return -z; /* atan(-,+) */ - case 2: return pi - (z-pi_lo); /* atan(+,-) */ + case 0: return z; /* atan(+,+) */ + case 1: return -z; /* atan(-,+) */ + case 2: return pi_hi-(z-pi_lo); /* atan(+,-) */ default: /* case 3 */ - return (z-pi_lo) - pi; /* atan(-,-) */ + return (z-pi_lo)-pi_hi; /* atan(-,-) */ } } #endif |