X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?p=rmac;a=blobdiff_plain;f=eagen0.c;h=b4b58861a24425c57f695a4f824a1bcd46887d2a;hp=c3feb2c0baaba382f51a72cfc1be110b31b406cc;hb=29b32d134bc12831a8ddd098bf9aeeda26dcfe7c;hpb=062214e62031c26d372edc2e68473ebb64f6a506 diff --git a/eagen0.c b/eagen0.c index c3feb2c..b4b5886 100644 --- a/eagen0.c +++ b/eagen0.c @@ -1,21 +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, 2011 Reboot and Friends +// Copyright (C) 199x Landon Dyer, 2011-2017 Reboot and Friends // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986 -// Source Utilised with the Kind Permission of Landon Dyer +// Source utilised with the kind permission of Landon Dyer // int eaNgen(WORD siz) { - WORD w; - VALUE v; - WORD tdb; - - v = aNexval; - w = (WORD)(aNexattr & DEFINED); - tdb = (WORD)(aNexattr & TDB); + uint32_t vbd, v = (uint32_t)aNexval; + WORD wbd, w = (WORD)(aNexattr & DEFINED); + WORD tdbbd, tdb = (WORD)(aNexattr & TDB); + vbd = (uint32_t)aNbdexval; + wbd = (WORD)(aNbdexattr & DEFINED); + tdbbd = (WORD)(aNbdexattr & TDB); + uint8_t extDbl[12]; switch (amN) { @@ -35,19 +35,49 @@ int eaNgen(WORD siz) // expr(An) if (w) { - // Just deposit it + // Just deposit it if (tdb) - rmark(cursect, sloc, tdb, MWORD, NULL); + MarkRelocatable(cursect, sloc, tdb, MWORD, NULL); + + 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 + // number of the register, then followed by a word containing + // 'expr'. We need to change that to 010rrr. + if ((siz & 0x8000) == 0) + { + chptr_opcode[0] &= ((0xFFC7 >> 8) & 255); // mask off bits + chptr_opcode[1] &= 0xFFC7 & 255; // mask off bits + chptr_opcode[0] |= ((0x0010 >> 8) & 255); // slap in 010 bits + chptr_opcode[1] |= 0x0010 & 255; // slap in 010 bits + } + else + { + // Special case for move ea,ea: there are two ea fields + // there and we get a signal if it's the second ea field + // from m_ea - siz's 16th bit is set + chptr_opcode[0] &= ((0xFE3F >> 8) & 255); // mask off bits + chptr_opcode[1] &= 0xFE3F & 255; // mask off bits + chptr_opcode[0] |= ((0x0080 >> 8) & 255); // slap in 010 bits + chptr_opcode[1] |= 0x0080 & 255; // slap in 010 bits + } + + if (sbra_flag) + warn("0(An) converted to (An)"); + + return OK; + } - if (v + 0x8000 >= 0x18000) + if ((v + 0x8000) >= 0x18000) return error(range_error); D_word(v); } else { - // Arrange for fixup later on - AddFixup(FU_WORD|FU_SEXT, sloc, aNexpr); + // Arrange for fixup later on + AddFixup(FU_WORD | FU_SEXT, sloc, aNexpr); D_word(0); } @@ -55,9 +85,9 @@ int eaNgen(WORD siz) case PCDISP: if (w) { - // Just deposit it + // Just deposit it if ((aNexattr & TDB) == cursect) - v -= (VALUE)sloc; + v -= (uint32_t)sloc; else if ((aNexattr & TDB) != ABS) error(rel_error); @@ -68,8 +98,8 @@ int eaNgen(WORD siz) } else { - // Arrange for fixup later on - AddFixup(FU_WORD|FU_SEXT|FU_PCREL, sloc, aNexpr); + // Arrange for fixup later on + AddFixup(FU_WORD | FU_SEXT | FU_PCREL, sloc, aNexpr); D_word(0); } @@ -80,21 +110,21 @@ int eaNgen(WORD siz) if (aNexattr & DEFINED) { - // Deposit a byte... + // Deposit a byte... if (tdb) - // Can't mark bytes + // Can't mark bytes return error(abs_error); if (v + 0x80 >= 0x180) return error(range_error); - w |= v & 0xff; + w |= v & 0xFF; D_word(w); } else { // Fixup the byte later - AddFixup(FU_BYTE|FU_SEXT, sloc+1, aNexpr); + AddFixup(FU_BYTE | FU_SEXT, sloc + 1, aNexpr); D_word(w); } @@ -105,22 +135,22 @@ int eaNgen(WORD siz) if (aNexattr & DEFINED) { - // Deposit a byte... - if ((aNexattr & TDB) == cursect) - v -= (VALUE)sloc; + // Deposit a byte... + if ((aNexattr & TDB) == cursect) + v -= (uint32_t)sloc; else if ((aNexattr & TDB) != ABS) error(rel_error); if (v + 0x80 >= 0x100) return error(range_error); - w |= v & 0xff; + w |= v & 0xFF; D_word(w); } else { - // Fixup the byte later - AddFixup(FU_WBYTE|FU_SEXT|FU_PCREL, sloc, aNexpr); + // Fixup the byte later + AddFixup(FU_WBYTE | FU_SEXT | FU_PCREL, sloc, aNexpr); D_word(w); } @@ -141,7 +171,7 @@ int eaNgen(WORD siz) } else { - AddFixup(FU_BYTE|FU_SEXT, sloc+1, aNexpr); + AddFixup(FU_BYTE | FU_SEXT, sloc + 1, aNexpr); D_word(0); } @@ -150,17 +180,17 @@ int eaNgen(WORD siz) case SIZN: if (w) { - if (tdb) - rmark(cursect, sloc, tdb, MWORD, NULL); - if (v + 0x10000 >= 0x20000) return error(range_error); + if (tdb) + MarkRelocatable(cursect, sloc, tdb, MWORD, NULL); + D_word(v); } else { - AddFixup(FU_WORD|FU_SEXT, sloc, aNexpr); + AddFixup(FU_WORD | FU_SEXT, sloc, aNexpr); D_word(0); } @@ -169,7 +199,7 @@ int eaNgen(WORD siz) if (w) { if (tdb) - rmark(cursect, sloc, tdb, MLONG, NULL); + MarkRelocatable(cursect, sloc, tdb, MLONG, NULL); D_long(v); } @@ -179,18 +209,86 @@ int eaNgen(WORD siz) D_long(0); } + break; + case SIZS: + // 68881/68882/68040 only + if (w) + { + 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) + { + 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) + { + if (tdb) + MarkRelocatable(cursect, sloc, tdb, MEXTEND, NULL); + + PTR p; + p.u64 = &aNexval; + DoubleToExtended(*p.dp, extDbl); + D_extend(extDbl); + } + else + { + 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) + if (w) // Defined { if (tdb) - rmark(cursect, sloc, tdb, MWORD, NULL); + MarkRelocatable(cursect, sloc, tdb, MWORD, NULL); if (v + 0x8000 >= 0x10000) return error(range_error); @@ -199,16 +297,16 @@ int eaNgen(WORD siz) } else { - AddFixup(FU_WORD|FU_SEXT, sloc, aNexpr); + AddFixup(FU_WORD | FU_SEXT, sloc, aNexpr); D_word(0); } break; case ABSL: - if (w) + if (w) // Defined { if (tdb) - rmark(cursect, sloc, tdb, MLONG, NULL); + MarkRelocatable(cursect, sloc, tdb, MLONG, NULL); D_long(v); } @@ -218,6 +316,12 @@ int eaNgen(WORD siz) D_long(0); } + break; + case DINDW: + D_word((0x190 | (aNixreg << 12))); + break; + case DINDL: + D_word((0x990 | (aNixreg << 12))); break; case ABASE: case MEMPOST: @@ -225,9 +329,102 @@ int eaNgen(WORD siz) 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, 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 + // Bad addressing mode in ea gen interror(3); } @@ -242,4 +439,9 @@ int eaNgen(WORD siz) #undef aNexpr #undef aNixreg #undef aNixsiz +#undef aNexten +#undef aNbexpr +#undef aNbdexval +#undef aNbdexattr +#undef AnESYM