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math: remove STRICT_ASSIGN macro

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gcc did not always drop excess precision according to c99 at assignments
before version 4.5 even if -std=c99 was requested which caused badly
broken mathematical functions on i386 when FLT_EVAL_METHOD!=0

but STRICT_ASSIGN was not used consistently and it is worked around for
old compilers with -ffloat-store so it is no longer needed

the new convention is to get the compiler respect c99 semantics and when
excess precision is not harmful use float_t or double_t or to specialize
code using FLT_EVAL_METHOD
This commit is contained in:
Szabolcs Nagy
2013-09-06 18:35:55 +00:00
parent f657fe4b9f
commit 9b0fcb441a
11 changed files with 13 additions and 23 deletions
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2
src/math/expm1.c
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@ -155,7 +155,7 @@ double expm1(double x)
hi = x - t*ln2_hi; /* t*ln2_hi is exact here */
lo = t*ln2_lo;
}
STRICT_ASSIGN(double, x, hi - lo);
x = hi-lo;
c = (hi-x)-lo;
} else if (hx < 0x3c900000) { /* |x| < 2**-54, return x */
if (hx < 0x00100000)