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small fix for performance

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This commit is contained in:
Stanislav Shwartsman 2024-04-24 09:03:37 +03:00
parent 3e4a966a2f
commit 8383260781
1 changed files with 6 additions and 2 deletions
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8
bochs/cpu/fpu/fyl2x.cc
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@ -211,12 +211,14 @@ invalid:
/* using float128 for approximation */
/* ******************************** */
float128_t b128 = softfloat_normRoundPackToF128(bSign, bExp-0x10, bSig, 0, &status);
Bit64u zSig0, zSig1;
shortShift128Right(aSig<<1, 0, 16, &zSig0, &zSig1);
float128_t x = packFloat128(0, aExp+0x3FFF, zSig0, zSig1);
x = poly_l2(x, status);
x = f128_add(x, i32_to_f128(ExpDiff), &status);
x = f128_mul(extF80_to_f128(b, &status), x, &status);
x = f128_mul(x, b128, &status);
return f128_to_extF80(x, &status);
}
@ -343,9 +345,11 @@ invalid:
/* using float128 for approximation */
/* ******************************** */
float128_t b128 = softfloat_normRoundPackToF128(bSign, bExp-0x10, bSig, 0, &status);
shortShift128Right(aSig<<1, 0, 16, &zSig0, &zSig1);
float128 x = packFloat128(aSign, aExp, zSig0, zSig1);
x = poly_l2p1(x, status);
x = f128_mul(extF80_to_f128(b, &status), x, &status);
x = f128_mul(x, b128, &status);
return f128_to_extF80(x, &status);
}