Archival checkin (semi-working code).

mach/powerpc/ncg/.distr

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+mach.c
+mach.h
+table

mach/powerpc/ncg/mach.c

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+/*
+ * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
+ * See the copyright notice in the ACK home directory, in the file "Copyright".
+ *
+ */
+
+#include <stdlib.h>
+#include <limits.h>
+
+#ifndef NORCSID
+static char rcsid[]=	"$Id$" ;
+#endif
+
+int framesize;
+
+/*
+ * machine dependent back end routines for the Zilog Z80.
+ */
+
+con_part(int sz, word w)
+{
+	while (part_size % sz)
+		part_size++;
+	if (part_size == TEM_WSIZE)
+		part_flush();
+	if (sz == 1) {
+		w &= 0xFF;
+		w <<= 8*(3-part_size);
+		part_word |= w;
+	} else if (sz == 2) {
+		w &= 0xFFFF;
+		if (part_size == 0) {
+			/* Shift 8 for m68k2, 16 otherwise */
+			w <<= 4 * TEM_WSIZE;
+		}
+		part_word |= w;
+	} else {
+		assert(sz == TEM_WSIZE);
+		part_word = w;
+	}
+	part_size += sz;
+}
+
+con_mult(word sz)
+{
+
+	if (argval != 4)
+		fatal("bad icon/ucon size");
+	fprintf(codefile,".data4 %s\n", str);
+}
+
+#define CODE_GENERATOR  
+#define IEEEFLOAT  
+#define FL_MSL_AT_LOW_ADDRESS	1
+#define FL_MSW_AT_LOW_ADDRESS	1
+#define FL_MSB_AT_LOW_ADDRESS	1
+#include <con_float>
+
+prolog(full nlocals)
+{
+	int ss = nlocals + 8;
+	fprintf(codefile, "addi sp, sp, %d\n", -ss);
+	fprintf(codefile, "stw fp, %d(sp)\n", nlocals);
+	fprintf(codefile, "mfspr r0, lr\n"
+	                  "stw r0, %d(sp)\n", nlocals+4);
+	fprintf(codefile, "addi fp, sp, %d\n", nlocals);
+	
+	framesize = nlocals;
+}
+
+mes(word type)
+{
+	int argt ;
+
+	switch ( (int)type ) {
+	case ms_ext :
+		for (;;) {
+			switch ( argt=getarg(
+			    ptyp(sp_cend)|ptyp(sp_pnam)|sym_ptyp) ) {
+			case sp_cend :
+				return ;
+			default:
+				strarg(argt) ;
+				fprintf(codefile,".define %s\n",argstr) ;
+				break ;
+			}
+		}
+	default :
+		while ( getarg(any_ptyp) != sp_cend ) ;
+		break ;
+	}
+}
+
+char *segname[] = {
+	".sect .text",
+	".sect .data",
+	".sect .rom",
+	".sect .bss"
+};
+
+#ifdef REGVARS
+
+static int savedregsi[32];
+static int numsaved;
+
+/* Initialise regvar system for one function. */
+
+i_regsave()
+{
+	int i;
+	
+	fprintf(codefile, "! i_regsave()\n");
+	for (i=0; i<32; i++)
+		savedregsi[i] = INT_MAX;
+	numsaved = 0;
+}
+
+/* Mark a register as being saved. */
+
+regsave(const char* regname, full offset, int size)
+{
+	int regnum = atoi(regname+1);
+	savedregsi[regnum] = offset;
+	numsaved++;
+	
+	fprintf(codefile, "! %d is saved in %s\n", offset, regname);
+#if 0
+	fprintf(codefile, "stwu %s, -4(sp)\n", regname);
+	if (offset >= 0)
+		fprintf(codefile, "lwz %s, %d(fp)\n", regname, offset);
+#endif
+}
+
+/* Finish saving ragisters. */
+
+void saveloadregs(const char* ops, const char* opm)
+{
+	int offset = -(framesize + numsaved*4);
+	int reg = 32;
+	
+	/* Check for the possibility of a multiple. */
+	
+	do
+	{
+		reg--;
+	}
+	while ((reg > 0) && (savedregsi[reg] != INT_MAX));
+	if (reg < 31)
+	{
+		fprintf(codefile, "%s r%d, %d(fp)\n", opm, reg+1, offset);
+		offset += (31-reg)*4;
+	}
+	
+	/* Saved everything else singly. */
+	
+	while (reg > 0)
+	{
+		if (savedregsi[reg] != INT_MAX)
+		{
+			fprintf(codefile, "%s r%d, %d(fp)\n", ops, reg, offset);
+			offset += 4;
+		}
+		reg--;
+	}
+}
+
+f_regsave()
+{
+	int i;
+	fprintf(codefile, "! f_regsave()\n");
+	fprintf(codefile, "addi sp, sp, %d\n", -numsaved*4);
+	
+	saveloadregs("stw", "stmw");
+	
+	for (i=0; i<32; i++)
+		if ((savedregsi[i] != INT_MAX) && (savedregsi[i] > 0))
+			fprintf(codefile, "lwz r%d, %d(fp)\n", i, savedregsi[i]);
+}
+
+/* Restore all saved registers. */
+
+regreturn()
+{
+	fprintf(codefile, "! regreturn()\n");
+	saveloadregs("lwz", "lmw");
+}
+
+/* Calculate the score of a given register. */
+
+int regscore(full offset, int size, int type, int frequency, int totype)
+{
+	int score;
+	
+	fprintf(codefile, "! regscore(%ld, %d, %d, %d, %d)\n", offset, size, type, frequency, totype);
+	
+	if (size != 4)
+		return -1;
+	
+	/* Per use: 6 bytes (on average)
+	 * Overhead in prologue: 4 bytes, plus 4 if a parameter
+	 * Overhead in epilogue: 0 bytes
+	 */
+	 
+	score = frequency*6 - 4 - ((offset>=0) ? 4 : 0);
+	fprintf(codefile, "! local at offset %d has regvar score %d\n", offset, score);
+	return score;
+}
+
+#endif

mach/powerpc/ncg/mach.h

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+/*
+ * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
+ * See the copyright notice in the ACK home directory, in the file "Copyright".
+ */
+/* $Id$ */
+#define ex_ap(y)        fprintf(codefile,".extern %s\n",y)
+#define in_ap(y)        /* nothing */
+
+#define newilb(x)       fprintf(codefile,"%s:\n",x)
+#define newdlb(x)       fprintf(codefile,"%s:\n",x)
+#define dlbdlb(x,y)     fprintf(codefile,"%s = %s\n",x,y)
+#define newlbss(l,x)       fprintf(codefile,".comm %s,%u\n",l,x);
+
+#define cst_fmt         "%d"
+#define off_fmt         "%d"
+#define ilb_fmt         "I%x_%x"
+#define dlb_fmt         "_%d"
+#define hol_fmt         "hol%d"
+
+#define hol_off         "%ld+hol%d"
+
+#define con_cst(x)      fprintf(codefile,".data4\t%ld\n",x)
+#define con_ilb(x)      fprintf(codefile,".data4\t%s\n",x)
+#define con_dlb(x)      fprintf(codefile,".data4\t%s\n",x)
+
+#define fmt_id(sf, st)	sprintf(st,"_%s",sf)
+
+#define modhead	".sect .text; .sect .rom; .sect .data; .sect .bss\n"
+
+#define BSS_INIT        0