X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?p=rmac;a=blobdiff_plain;f=eagen0.c;h=1d94c077cf49b8d7424f9ba1b5447daca78f2642;hp=7fe382a115c5c692a04aed6e19c321cdb6e3e5a4;hb=4205233c8397c581b4d27ab36ab81ec896ef3dd0;hpb=03dd34951a331e0b8971195ccef1600fffaea2e6 diff --git a/eagen0.c b/eagen0.c index 7fe382a..1d94c07 100644 --- a/eagen0.c +++ b/eagen0.c @@ -2,19 +2,20 @@ // 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, 2011-2017 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 vbd, v = aNexval; - WORD wbd, w = (WORD)(aNexattr & DEFINED); - WORD tdbbd, tdb = (WORD)(aNexattr & TDB); - vbd = aNbdexval; - wbd = (WORD)(aNbdexattr & DEFINED); - tdbbd = (WORD)(aNbdexattr & TDB); + 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) { @@ -30,6 +31,7 @@ int eaNgen(WORD siz) case AM_NONE: // This is a performance hit, though break; + case ADISP: // expr(An) if (w) @@ -38,7 +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 @@ -81,12 +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); @@ -103,6 +106,7 @@ int eaNgen(WORD siz) } break; + case AINDEXED: // Compute ixreg and size+scale w = (WORD)((aNixreg << 12) | aNixsiz); @@ -128,6 +132,7 @@ int eaNgen(WORD siz) } break; + case PCINDEXED: // Compute ixreg and size+scale w = (WORD)((aNixreg << 12) | aNixsiz); @@ -136,7 +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); @@ -154,6 +159,7 @@ int eaNgen(WORD siz) } break; + case IMMED: switch (siz) { @@ -166,7 +172,7 @@ int eaNgen(WORD siz) if (v + 0x100 >= 0x200) return error(range_error); - D_word(v); + D_word(v & 0xFF); } else { @@ -175,6 +181,7 @@ int eaNgen(WORD siz) } break; + case SIZW: case SIZN: if (w) @@ -194,6 +201,7 @@ int eaNgen(WORD siz) } break; + case SIZL: if (w) { @@ -209,16 +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 { @@ -237,6 +322,7 @@ int eaNgen(WORD siz) } break; + case ABSL: if (w) // Defined { @@ -252,6 +338,15 @@ 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: @@ -259,12 +354,13 @@ int eaNgen(WORD siz) case PCMPOST: case PCMPRE: D_word(aNexten); + // Deposit bd (if not suppressed) - if ((aNexten&0x0030)==EXT_BDSIZE0) + if ((aNexten & 0x0030) == EXT_BDSIZE0) { // Don't deposit anything (suppressed) } - else if ((aNexten&0x0030)==EXT_BDSIZEW) + else if ((aNexten & 0x0030) == EXT_BDSIZEW) { // Deposit word bd if (wbd) @@ -281,7 +377,7 @@ int eaNgen(WORD siz) else { // Arrange for fixup later on - AddFixup(FU_WORD|FU_SEXT, sloc, aNexpr); + AddFixup(FU_WORD | FU_SEXT | FU_PCRELX, sloc, aNbexpr); D_word(0); } } @@ -299,18 +395,19 @@ int eaNgen(WORD siz) else { // Arrange for fixup later on - AddFixup(FU_LONG|FU_SEXT, sloc, aNexpr); + 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) + 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) + else if ((aNexten & 7) == EXT_IISPREW + || (aNexten & 7) == EXT_IISPOSW || (aNexten & 7) == EXT_IISNOIW) { // Deposit word od if (w) @@ -327,7 +424,7 @@ int eaNgen(WORD siz) else { // Arrange for fixup later on - AddFixup(FU_WORD|FU_SEXT, sloc, aNexpr); + AddFixup(FU_WORD | FU_SEXT, sloc, aNexpr); D_word(0); } } @@ -345,13 +442,14 @@ int eaNgen(WORD siz) else { // Arrange for fixup later on - AddFixup(FU_LONG|FU_SEXT, sloc, aNexpr); + 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); @@ -369,6 +467,7 @@ int eaNgen(WORD siz) #undef aNixreg #undef aNixsiz #undef aNexten +#undef aNbexpr #undef aNbdexval #undef aNbdexattr #undef AnESYM