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root/cebix/BasiliskII/src/uae_cpu/gencpu.c

Comparing BasiliskII/src/uae_cpu/gencpu.c (file contents):
Revision 1.24 by gbeauche, 2007-06-29T16:32:05Z vs.
Revision 1.25 by gbeauche, 2007-06-30T08:00:31Z

#	Line 30 | Line 30
30
31		#define BOOL_TYPE "int"
32
33	+	/* Define the minimal 680x0 where NV flags are not affected by xBCD instructions.  */
34	+	#define xBCD_KEEPS_NV_FLAGS 4
35	+
36		static FILE *headerfile;
37		static FILE *stblfile;
38
#	Line 568 | Line 571 | static void duplicate_carry (void)
571		}
572
573		typedef enum {
574	<	flag_logical_noclobber, flag_logical, flag_add, flag_sub, flag_cmp, flag_addx, flag_subx, flag_zn,
574	>	flag_logical_noclobber, flag_logical, flag_add, flag_sub, flag_cmp, flag_addx, flag_subx, flag_z, flag_zn,
575		flag_av, flag_sv
576		} flagtypes;
577
#	Line 622 | Line 625 | static void genflags_normal (flagtypes t
625		switch (type) {
626		case flag_logical_noclobber:
627		case flag_logical:
628	+	case flag_z:
629		case flag_zn:
630		case flag_av:
631		case flag_sv:
#	Line 643 | Line 647 | static void genflags_normal (flagtypes t
647		switch (type) {
648		case flag_logical_noclobber:
649		case flag_logical:
650	+	case flag_z:
651		case flag_zn:
652		break;
653
#	Line 676 | Line 681 | static void genflags_normal (flagtypes t
681		case flag_sv:
682		printf ("\tSET_VFLG ((flgs ^ flgo) & (flgn ^ flgo));\n");
683		break;
684	+	case flag_z:
685	+	printf ("\tSET_ZFLG (GET_ZFLG & (%s == 0));\n", vstr);
686	+	break;
687		case flag_zn:
688		printf ("\tSET_ZFLG (GET_ZFLG & (%s == 0));\n", vstr);
689		printf ("\tSET_NFLG (%s < 0);\n", vstr);
#	Line 921 | Line 929 | static void gen_opcode (unsigned long in
929		printf ("\tif ((((dst & 0xFF) - (src & 0xFF) - (GET_XFLG ? 1 : 0)) & 0x100) > 0xFF) { newv -= 0x60; }\n");
930		printf ("\tSET_CFLG ((((dst & 0xFF) - (src & 0xFF) - bcd - (GET_XFLG ? 1 : 0)) & 0x300) > 0xFF);\n");
931		duplicate_carry ();
932	<	genflags (flag_zn, curi->size, "newv", "", "");
933	<	printf ("\tSET_VFLG ((tmp_newv & 0x80) != 0 && (newv & 0x80) == 0);\n");
932	>	/* Manual says bits NV are undefined though a real 68040 don't change them */
933	>	if (cpu_level >= xBCD_KEEPS_NV_FLAGS) {
934	>	if (next_cpu_level < xBCD_KEEPS_NV_FLAGS)
935	>	next_cpu_level = xBCD_KEEPS_NV_FLAGS - 1;
936	>	genflags (flag_z, curi->size, "newv", "", "");
937	>	}
938	>	else {
939	>	genflags (flag_zn, curi->size, "newv", "", "");
940	>	printf ("\tSET_VFLG ((tmp_newv & 0x80) != 0 && (newv & 0x80) == 0);\n");
941	>	}
942		genastore ("newv", curi->dmode, "dstreg", curi->size, "dst");
943		break;
944		case i_ADD:
#	Line 962 | Line 978 | static void gen_opcode (unsigned long in
978		printf ("\tif (cflg) newv += 0x60;\n");
979		printf ("\tSET_CFLG (cflg);\n");
980		duplicate_carry ();
981	<	genflags (flag_zn, curi->size, "newv", "", "");
982	<	printf ("\tSET_VFLG ((tmp_newv & 0x80) == 0 && (newv & 0x80) != 0);\n");
981	>	/* Manual says bits NV are undefined though a real 68040 don't change them */
982	>	if (cpu_level >= xBCD_KEEPS_NV_FLAGS) {
983	>	if (next_cpu_level < xBCD_KEEPS_NV_FLAGS)
984	>	next_cpu_level = xBCD_KEEPS_NV_FLAGS - 1;
985	>	genflags (flag_z, curi->size, "newv", "", "");
986	>	}
987	>	else {
988	>	genflags (flag_zn, curi->size, "newv", "", "");
989	>	printf ("\tSET_VFLG ((tmp_newv & 0x80) == 0 && (newv & 0x80) != 0);\n");
990	>	}
991		genastore ("newv", curi->dmode, "dstreg", curi->size, "dst");
992		break;
993		case i_NEG:
#	Line 993 | Line 1017 | static void gen_opcode (unsigned long in
1017		printf ("\tif (cflg) newv -= 0x60;\n");
1018		printf ("\tSET_CFLG (cflg);\n");
1019		duplicate_carry();
1020	<	genflags (flag_zn, curi->size, "newv", "", "");
1020	>	/* Manual says bits NV are undefined though a real 68040 don't change them */
1021	>	if (cpu_level >= xBCD_KEEPS_NV_FLAGS) {
1022	>	if (next_cpu_level < xBCD_KEEPS_NV_FLAGS)
1023	>	next_cpu_level = xBCD_KEEPS_NV_FLAGS - 1;
1024	>	genflags (flag_z, curi->size, "newv", "", "");
1025	>	}
1026	>	else {
1027	>	genflags (flag_zn, curi->size, "newv", "", "");
1028	>	}
1029		genastore ("newv", curi->smode, "srcreg", curi->size, "src");
1030		break;
1031		case i_CLR:

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