X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?p=rmac;a=blobdiff_plain;f=eagen0.c;h=2df5eceea09d11eb470232e8796d48c950bca594;hp=a9b6f7ee496a181cb43384eae8c7af2835b6dc09;hb=ace0b549a94110b69ec61442f825fb421b79799a;hpb=f33d7fdb41ccdda027c33c5358a3826bef83967b diff --git a/eagen0.c b/eagen0.c index a9b6f7e..2df5ece 100644 --- a/eagen0.c +++ b/eagen0.c @@ -1,17 +1,21 @@ // -// RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System +// RMAC - Reboot's Macro Assembler for all Atari computers // EAGEN0.C - Effective Address Code Generation // Generated Code for eaN (Included twice by "eagen.c") -// Copyright (C) 199x Landon Dyer, 2017 Reboot and Friends +// Copyright (C) 199x Landon Dyer, 2011-2020 Reboot and Friends // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986 // Source utilised with the kind permission of Landon Dyer // int eaNgen(WORD siz) { - VALUE v = aNexval; + uint32_t v = (uint32_t)aNexval; WORD w = (WORD)(aNexattr & DEFINED); WORD tdb = (WORD)(aNexattr & TDB); + uint32_t vbd = (uint32_t)aNbdexval; + WORD wbd = (WORD)(aNbdexattr & DEFINED); + WORD tdbbd = (WORD)(aNbdexattr & TDB); + uint8_t extDbl[12]; switch (amN) { @@ -27,6 +31,7 @@ int eaNgen(WORD siz) case AM_NONE: // This is a performance hit, though break; + case ADISP: // expr(An) if (w) @@ -35,7 +40,7 @@ int eaNgen(WORD siz) if (tdb) MarkRelocatable(cursect, sloc, tdb, MWORD, NULL); - if ((v == 0) && optim_flags[OPT_INDIRECT_DISP] && !movep) + if ((v == 0) && CHECK_OPTS(OPT_INDIRECT_DISP) && !movep) { // If expr is 0, size optimise the opcode. Generally the lower // 6 bits of the opcode for expr(ax) are 101rrr where rrr=the @@ -78,12 +83,13 @@ int eaNgen(WORD siz) } break; + case PCDISP: if (w) { // Just deposit it if ((aNexattr & TDB) == cursect) - v -= (VALUE)sloc; + v -= (uint32_t)sloc; else if ((aNexattr & TDB) != ABS) error(rel_error); @@ -100,6 +106,7 @@ int eaNgen(WORD siz) } break; + case AINDEXED: // Compute ixreg and size+scale w = (WORD)((aNixreg << 12) | aNixsiz); @@ -125,6 +132,7 @@ int eaNgen(WORD siz) } break; + case PCINDEXED: // Compute ixreg and size+scale w = (WORD)((aNixreg << 12) | aNixsiz); @@ -133,7 +141,7 @@ int eaNgen(WORD siz) { // Deposit a byte... if ((aNexattr & TDB) == cursect) - v -= (VALUE)sloc; + v -= (uint32_t)sloc; else if ((aNexattr & TDB) != ABS) error(rel_error); @@ -151,6 +159,7 @@ int eaNgen(WORD siz) } break; + case IMMED: switch (siz) { @@ -163,7 +172,7 @@ int eaNgen(WORD siz) if (v + 0x100 >= 0x200) return error(range_error); - D_word(v); + D_word(v & 0xFF); } else { @@ -172,6 +181,7 @@ int eaNgen(WORD siz) } break; + case SIZW: case SIZN: if (w) @@ -191,6 +201,7 @@ int eaNgen(WORD siz) } break; + case SIZL: if (w) { @@ -206,12 +217,93 @@ int eaNgen(WORD siz) } break; + + case SIZS: + // 68881/68882/68040 only + if (w) + { +//Would a floating point value *ever* need to be fixed up as if it were an address? :-P +// if (tdb) +// MarkRelocatable(cursect, sloc, tdb, MSINGLE, NULL); + + // The value passed back from expr() is an internal C double; + // so we have to access it as such then convert it to an + // IEEE-754 float so we can store it as such in the instruction + // stream here. + PTR p; + p.u64 = &aNexval; + float f = (float)*p.dp; + uint32_t ieee754 = FloatToIEEE754(f); + D_long(ieee754); + } + else + { + AddFixup(FU_FLOATSING, sloc, aNexpr); + D_long(0); // IEEE-754 zero is all zeroes + } + + break; + + case SIZD: + // 68881/68882/68040 only + if (w) + { +//Would a floating point value *ever* need to be fixed up as if it were an address? :-P +// if (tdb) +// MarkRelocatable(cursect, sloc, tdb, MDOUBLE, NULL); + + PTR p; + p.u64 = &aNexval; + double d = *p.dp; + uint64_t ieee754 = DoubleToIEEE754(d); + D_quad(ieee754); + } + else + { + AddFixup(FU_FLOATDOUB, sloc, aNexpr); + D_quad(0LL); // IEEE-754 zero is all zeroes + } + + break; + + case SIZX: + // 68881/68882/68040 only + if (w) + { +//Would a floating point value *ever* need to be fixed up as if it were an address? :-P +// if (tdb) +// MarkRelocatable(cursect, sloc, tdb, MEXTEND, NULL); + + PTR p; + p.u64 = &aNexval; + DoubleToExtended(*p.dp, extDbl); + D_extend(extDbl); + } + else + { + // Why would this be anything other than a floating point + // expression??? Even if there were an undefined symbol in + // the expression, how would that be relevant? I can't see + // any use case where this would make sense. + AddFixup(FU_FLOATDOUB, sloc, aNexpr); + memset(extDbl, 0, 12); + D_extend(extDbl); + } + + break; + default: // IMMED size problem interror(1); } break; + + case SIZP: + // 68881/68882/68040 only + return error("Sorry, .p constant format is not implemented yet!"); + break; + case ABSW: if (w) // Defined { @@ -230,9 +322,14 @@ int eaNgen(WORD siz) } break; + case ABSL: if (w) // Defined { + if (optim_pc) + if (aNexattr&(DEFINED | REFERENCED | EQUATED) == DEFINED | REFERENCED) + return error("relocation not allowed"); + if (tdb) MarkRelocatable(cursect, sloc, tdb, MLONG, NULL); @@ -245,13 +342,118 @@ int eaNgen(WORD siz) } break; + + case DINDW: + D_word((0x190 | (aNixreg << 12))); + break; + + case DINDL: + D_word((0x990 | (aNixreg << 12))); + break; + case ABASE: case MEMPOST: case MEMPRE: case PCBASE: case PCMPOST: case PCMPRE: - return error("unsupported 68020 addressing mode"); + D_word(aNexten); + + // Deposit bd (if not suppressed) + if ((aNexten & 0x0030) == EXT_BDSIZE0) + { + // Don't deposit anything (suppressed) + } + else if ((aNexten & 0x0030) == EXT_BDSIZEW) + { + // Deposit word bd + if (wbd) + { + // Just deposit it + if (tdb) + MarkRelocatable(cursect, sloc, tdbbd, MWORD, NULL); + + if (vbd + 0x8000 >= 0x10000) + return error(range_error); + + D_word(vbd); + } + else + { + // Arrange for fixup later on + AddFixup(FU_WORD | FU_SEXT | FU_PCRELX, sloc, aNbexpr); + D_word(0); + } + } + else + { + // Deposit long bd + if (wbd) + { + // Just deposit it + if (tdbbd) + MarkRelocatable(cursect, sloc, tdbbd, MLONG, NULL); + + D_long(vbd); + } + else + { + // Arrange for fixup later on + AddFixup(FU_LONG, sloc, aNbexpr); + D_long(0); + } + } + + // Deposit od (if not suppressed) + if ((aNexten & 7) == EXT_IISPRE0 || (aNexten & 7) == EXT_IISPREN + || (aNexten & 7) == EXT_IISNOIN || (aNexten & 7) == EXT_IISPOSN) + { + // Don't deposit anything (suppressed) + } + else if ((aNexten & 7) == EXT_IISPREW + || (aNexten & 7) == EXT_IISPOSW || (aNexten & 7) == EXT_IISNOIW) + { + // Deposit word od + if (w) + { + // Just deposit it + if (tdb) + MarkRelocatable(cursect, sloc, tdb, MWORD, NULL); + + if (v + 0x8000 >= 0x10000) + return error(range_error); + + D_word(v); + } + else + { + // Arrange for fixup later on + AddFixup(FU_WORD | FU_SEXT, sloc, aNexpr); + D_word(0); + } + } + else + { + // Deposit long od + if (w) + { + // Just deposit it + if (tdb) + MarkRelocatable(cursect, sloc, tdb, MLONG, NULL); + + D_long(v); + } + else + { + // Arrange for fixup later on + AddFixup(FU_LONG | FU_SEXT, sloc, aNexpr); + D_long(0); + } + } + + break; + //return error("unsupported 68020 addressing mode"); + default: // Bad addressing mode in ea gen interror(3); @@ -268,5 +470,9 @@ int eaNgen(WORD siz) #undef aNexpr #undef aNixreg #undef aNixsiz +#undef aNexten +#undef aNbexpr +#undef aNbdexval +#undef aNbdexattr #undef AnESYM