X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?p=rmac;a=blobdiff_plain;f=eagen0.c;h=62e686c144859631a44d8f5026a84e9828d16300;hp=a9b6f7ee496a181cb43384eae8c7af2835b6dc09;hb=582df8950c285e1746d0c4a9e3ead6545c962dc8;hpb=f33d7fdb41ccdda027c33c5358a3826bef83967b diff --git a/eagen0.c b/eagen0.c index a9b6f7e..62e686c 100644 --- a/eagen0.c +++ b/eagen0.c @@ -1,17 +1,20 @@ // -// 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, 2011-2017 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; - WORD w = (WORD)(aNexattr & DEFINED); - WORD 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); switch (amN) { @@ -35,7 +38,7 @@ 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 @@ -83,7 +86,7 @@ int eaNgen(WORD siz) { // Just deposit it if ((aNexattr & TDB) == cursect) - v -= (VALUE)sloc; + v -= (uint32_t)sloc; else if ((aNexattr & TDB) != ABS) error(rel_error); @@ -133,7 +136,7 @@ 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); @@ -205,12 +208,90 @@ int eaNgen(WORD siz) D_long(0); } + break; + case SIZS: + // 68881/68882/68040 only + if (w) + { + float vv; + if (tdb) + MarkRelocatable(cursect, sloc, tdb, MSINGLE, NULL); + + vv = (float)v; + + D_single(vv); + } + else + { + float vv = 0; + AddFixup(FU_FLOATSING, sloc, aNexpr); + + D_single(vv); + } + + break; + case SIZD: + // 68881/68882/68040 only + if (w) + { + double vv; + unsigned long long vvv; + if (tdb) + MarkRelocatable(cursect, sloc, tdb, MDOUBLE, NULL); + + // We want to store the IEE754 float into ram from a generic + // 32-bit int. First, convert it to double float, then cast + // that to 64-bit, then convert to big endian (if needed) + // and then store it (phew!) + vv = *(float *)&aNexval; + vvv = BYTESWAP64(*(unsigned long long *)&vv); + + D_double(vvv); + } + else + { + unsigned long long vvv = 0; + AddFixup(FU_FLOATDOUB, sloc, aNexpr); + + D_double(vvv); + } + + break; + case SIZX: + // 68881/68882/68040 only + if (w) + { + long double vv; + if (tdb) + MarkRelocatable(cursect, sloc, tdb, MEXTEND, NULL); + + // We want to store the IEE754 float into ram from a generic + // 32-bit int. First, convert it to double float, then cast + // that to 96-bit, then convert to big endian (if needed) + // and then store it (phew!) + vv = (double)aNexval; + + //*chptr++ = (char)((*(unsigned long long *)&vv) >> 32) | 0x80 /* assume that the number is normalised */; + D_extend(vv); + } + else + { + long double vvv = 0; + AddFixup(FU_FLOATDOUB, sloc, aNexpr); + + D_extend(vvv); + } + 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 @@ -244,6 +325,12 @@ 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: @@ -251,7 +338,100 @@ 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 interror(3); @@ -268,5 +448,9 @@ int eaNgen(WORD siz) #undef aNexpr #undef aNixreg #undef aNixsiz +#undef aNexten +#undef aNbexpr +#undef aNbdexval +#undef aNbdexattr #undef AnESYM