powerpc: Fix FPU fsqrt emulation special case results
If fsqrts is emulated with +INF as its argument, the 0 return value causes a NULL pointer dereference, panicking the system. Follow the PowerISA and return +INF with no FP exception. MFC after: 1 week
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=343078
@ -226,12 +226,12 @@ fpu_sqrt(struct fpemu *fe)
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return (x);
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}
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if (x->fp_sign) {
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fe->fe_cx |= FPSCR_VXSQRT;
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return (fpu_newnan(fe));
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}
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if (ISINF(x)) {
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fe->fe_cx |= FPSCR_VXSQRT;
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DUMPFPN(FPE_REG, 0);
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return (0);
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DUMPFPN(FPE_REG, x);
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return (x);
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}
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/*
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