Add support for compiling float operations to x86-64 #417
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Requires changes under backend/. Some changes to ASM were made: - fp_ok now checks for two_reg_arith. However, FPAbs and FPNeg are unusual in that they require the source and destination to be distinct. - The semantics of FPToInt and FPFromInt have been changed (for 64-bit architectures) to only support a 32-bit integer values. Supporting 64 bits would have required a longer sequence of instructions and the use of an "avoid" general purpose register, which is otherwise unnecessary. The second change has broken the MIPS support for floating-point. It has been disabled by setting fp_reg_count to zero. It shouldn't be that difficult to support the new semantics under MIPS.
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This breaks the bootstrap. Reopen when fixed. |
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bootstrap/translation now builds |
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