Add FUCOMPP (DA E9) - #217
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egorich239 wants to merge 1 commit into
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egorich239 wants to merge 1 commit into
egorich239 wants to merge 1 commit into
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FUCOMPP compares st(0) with st(1) unordered and pops both, the way FCOMPP does with an ordered compare. tcc emits it for == and != on long doubles, so any such program raised SIGILL under blink. Verified with a freestanding program that runs the instruction on three pairs of long doubles and prints C0 and C3, which now match the host, and with a tcc built inside an emulated bootstrap that stopped faulting on its first long double comparison.
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FUCOMPP compares st(0) with st(1) unordered and pops both, the way FCOMPP does with an ordered compare. tcc emits it for == and != on long doubles, so any such program raised SIGILL under blink.