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Merge pull request #145 from davidgiven/dtrg-arraysizes

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Experimentally use rst 1 to optimise frame variable loads.
This commit is contained in:
David Given 2019-02-08 21:53:56 +01:00 committed by GitHub
parent 1982301639 19f5ee3399
commit 996188d20a
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GPG key ID: 4AEE18F83AFDEB23
12 changed files with 178 additions and 43 deletions
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4
mach/i80/libem/pro.s
View file

@ -21,8 +21,8 @@
.probyte:
pop h
push b
mvi e, 0xff
mov d, m
mvi d, 0xff
mov e, m
inx h
jmp .pron

54
mach/i80/libem/rst.s Normal file
View file

@ -0,0 +1,54 @@
#
.sect .text
.sect .rom
.sect .data
.sect .bss
.sect .text
.define .rst_init
.rst_init:
mvi a, 0xc3 ! jmp <a16>
sta 0x08
sta 0x10
lxi h, rst1
shld 0x09
lxi h, rst2
shld 0x11
ret
! de = [bc+const1] (remember bc is the frame pointer)
rst1:
pop h
mov a, m
inx h
push h
mov l, a
ral
sbb a
mov h, a
dad b
mov e, m
inx h
mov d, m
ret
! [bc+const1] = de (remember bc is the frame pointer)
rst2:
pop h
mov a, m
inx h
push h
mov l, a
ral
sbb a
mov h, a
dad b
mov m, e
inx h
mov m, d
ret

7
mach/i80/ncg/mach.c
View file

@ -4,18 +4,13 @@
*
*/
#ifndef NORCSID
static char rcsid[] = "$Id$";
#endif
/*
* machine dependent back end routines for the Intel 8080.
*/
#include <stdlib.h> /* atol */
void con_part(sz, w) register sz;
word w;
void con_part(int sz, word w)
{
while (part_size % sz)

47
mach/i80/ncg/table
View file

@ -82,6 +82,8 @@ INSTRUCTIONS
/* cpo label:ro cost(3,14). */
/* cz label:ro cost(3,14). */
/* daa kills a:cc cost(1, 4). */
data1 ".data1" const1:ro.
data2 ".data2" const2:ro.
dad b_d_h_sp:ro kills hl:cc cost(1,10).
dcr reg+lbreg:rw:cc cost(1, 5).
dcr m:rw:cc cost(1, 7).
@ -129,7 +131,7 @@ INSTRUCTIONS
/* rpe cost(1, 8). */
/* rpo cost(1, 8). */
rrc kills a:cc cost(1, 4).
/* rst const1:ro cost(1,11). */
rst const1:ro cost(1,11).
/* rz cost(1, 8). */
sbb reg1:ro kills a:cc cost(1, 4).
/* sbi const1:ro kills a:cc cost(2, 7). */
@ -241,12 +243,23 @@ pat loc yields {const2,$1}
pat ldc yields {const2,highw($1)}
{const2,loww($1)}
#ifdef USE_I80_RSTS
pat lol sfit($1, 8)
uses hlreg, areg, dereg
gen
rst {const1, 1}
data1 {const1, $1}
yields de
#endif
pat lol
uses hlreg={const2,$1}, dereg
gen dad lb
mov e,{m}
inx hl
mov d,{m} yields de
uses hlreg={const2, $1}, dereg
gen
dad lb
mov e,{m}
inx hl
mov d,{m}
yields de
pat loe
uses hlreg
@ -446,13 +459,23 @@ uses hl_or_de={label,$1} yields %a
pat stl lol $1==$2
with dereg yields de de leaving stl $1
#ifdef USE_I80_RSTS
pat stl sfit($1, 8)
with dereg
uses hlreg, areg
gen
rst {const1, 2}
data1 {const1, $1}
#endif
pat stl
with dereg
uses hlreg={const2,$1}
gen dad lb
mov {m},e
inx hl
mov {m},d
with dereg
uses hlreg={const2, $1}
gen
dad lb
mov {m}, e
inx hl
mov {m}, d
pat ste loe $1==$2
with hlreg yields hl hl leaving ste $1

2
mach/proto/ncg/salloc.c
View file

@ -34,7 +34,7 @@ int nstab=0;
static void chkstr(string, char *);
string myalloc(size) {
string myalloc(int size) {
string p;
p = (string) calloc((unsigned)size, 1);

1
mach/proto/ncg/types.h
View file

@ -44,6 +44,7 @@ void in_init(char *);
void in_start(void);
void fillemlines(void);
void swtxt(void);
void dopseudo(void);
/* gencode.c */
void out_init(char *);
void out_finish(void);

6
plat/cpm/boot.s
View file

@ -48,6 +48,12 @@ begtext:
lxi sp, stack + STACKSIZE
! Initialise the rsts (if desired).
#ifdef USE_I80_RSTS
call .rst_init
#endif
! C-ify the command line at 0x0080.
lxi h, 0x0080

5
plat/cpm/build-pkg.lua
View file

@ -4,7 +4,10 @@ include("lang/build.lua")
ackfile {
name = "boot",
srcs = { "./boot.s" },
vars = { plat = "cpm" }
vars = {
plat = "cpm",
["+ackcflags"] = "-DUSE_I80_RSTS",
}
}
build_plat_libs {

3
plat/cpm/build-tools.lua
View file

@ -8,6 +8,9 @@ build_as {
build_ncg {
name = "ncg",
arch = "i80",
vars = {
["+cflags"] = "-DUSE_I80_RSTS"
}
}
build_top {

22
plat/cpm/emu/dis8080.c
View file

@ -343,24 +343,36 @@ static struct insn insns[0x100] =
uint16_t i8080_disassemble(char* buffer, size_t bufsiz, uint16_t pc)
{
uint8_t opcode = i8080_read(pc++);
uint8_t opcode = i8080_read(pc);
uint8_t p1 = i8080_read(pc+1);
uint8_t p2 = i8080_read(pc+2);
struct insn* insn = &insns[opcode];
uint16_t value = 0;
const char* left = "";
snprintf(buffer, bufsiz, "%04x : ", pc);
pc++;
switch (insn->operand)
{
case NOTHING:
left = "%02x : ";
break;
case CONST8:
value = i8080_read(pc++);
left = "%02x %02x : ";
value = p1;
pc++;
break;
case CONST16:
value = i8080_read(pc++);
value |= i8080_read(pc++) << 8;
left = "%02x %02x %02x : ";
value = p1 | (p2<<8);
pc += 2;
break;
}
snprintf(buffer, bufsiz, insn->name, value);
snprintf(buffer + 7, bufsiz - 7, left, opcode, p1, p2);
snprintf(buffer + 18, bufsiz - 18, insn->name, value);
return pc;
}

52
plat/cpm/emu/emulator.c
View file

@ -23,6 +23,8 @@ static bool tracing = false;
static bool singlestepping = true;
static bool bdosbreak = false;
static const char* delimiters = " \t\n\r";
uint8_t i8080_read(uint16_t addr)
{
return ram[addr];
@ -65,13 +67,13 @@ void showregs(void)
int tstates;
uint16_t pc = i8080_read_reg16(PC);
i8080_disassemble(buffer, sizeof(buffer), pc);
printf("%04x : %s\n", pc, buffer);
puts(buffer);
}
static void cmd_register(void)
{
char* w1 = strtok(NULL, " ");
char* w2 = strtok(NULL, " ");
char* w1 = strtok(NULL, delimiters);
char* w2 = strtok(NULL, delimiters);
if (w1 && w2)
{
@ -102,7 +104,7 @@ static void cmd_register(void)
static void cmd_break(void)
{
char* w1 = strtok(NULL, " ");
char* w1 = strtok(NULL, delimiters);
if (w1)
{
uint16_t breakpc = strtoul(w1, NULL, 16);
@ -128,7 +130,7 @@ static void cmd_break(void)
static void cmd_watch(void)
{
char* w1 = strtok(NULL, " ");
char* w1 = strtok(NULL, delimiters);
if (w1)
{
uint16_t watchaddr = strtoul(w1, NULL, 16);
@ -158,7 +160,7 @@ static void cmd_watch(void)
static void cmd_delete_breakpoint(void)
{
char* w1 = strtok(NULL, " ");
char* w1 = strtok(NULL, delimiters);
if (w1)
{
uint16_t breakpc = strtoul(w1, NULL, 16);
@ -176,7 +178,7 @@ static void cmd_delete_breakpoint(void)
static void cmd_delete_watchpoint(void)
{
char* w1 = strtok(NULL, " ");
char* w1 = strtok(NULL, delimiters);
if (w1)
{
uint16_t address = strtoul(w1, NULL, 16);
@ -195,8 +197,8 @@ static void cmd_delete_watchpoint(void)
static void cmd_memory(void)
{
char* w1 = strtok(NULL, " ");
char* w2 = strtok(NULL, " ");
char* w1 = strtok(NULL, delimiters);
char* w2 = strtok(NULL, delimiters);
if (!w2)
w2 = "100";
@ -241,9 +243,30 @@ static void cmd_memory(void)
}
}
static void cmd_unassemble(void)
{
char* w1 = strtok(NULL, delimiters);
char* w2 = strtok(NULL, delimiters);
uint16_t startaddr = i8080_read_reg16(PC);
uint16_t endaddr;
if (w1)
startaddr = strtoul(w1, NULL, 16);
endaddr = startaddr + 0x20;
if (w2)
endaddr = startaddr + strtoul(w2, NULL, 16);
while (startaddr < endaddr)
{
char buffer[80];
startaddr = i8080_disassemble(buffer, sizeof(buffer), startaddr);
puts(buffer);
}
}
static void cmd_bdos(void)
{
char* w1 = strtok(NULL, " ");
char* w1 = strtok(NULL, delimiters);
if (w1)
bdosbreak = !!strtoul(w1, NULL, 16);
else
@ -252,7 +275,7 @@ static void cmd_bdos(void)
static void cmd_tracing(void)
{
char* w1 = strtok(NULL, " ");
char* w1 = strtok(NULL, delimiters);
if (w1)
tracing = !!strtoul(w1, NULL, 16);
else
@ -270,10 +293,11 @@ static void cmd_help(void)
" w <addr> set watchpoint\n"
" dw <addr> delete watchpoint\n"
" m <addr> <len> show memory\n"
" u <addr> <len> unassemble memory\n"
" s single step\n"
" g continue\n"
" bdos 0|1 enable break on bdos entry\n"
" trace 0|1 enable tracing\n"
" tracing 0|1 enable tracing\n"
);
}
@ -289,7 +313,7 @@ static void debug(void)
if (!fgets(cmdline, sizeof(cmdline), stdin))
exit(0);
char* token = strtok(cmdline, " \n\r\t");
char* token = strtok(cmdline, delimiters);
if (token != NULL)
{
if (strcmp(token, "?") == 0)
@ -306,6 +330,8 @@ static void debug(void)
cmd_delete_watchpoint();
else if (strcmp(token, "m") == 0)
cmd_memory();
else if (strcmp(token, "u") == 0)
cmd_unassemble();
else if (strcmp(token, "s") == 0)
{
singlestepping = true;

16
plat/cpm/libsys/brk.c
View file

@ -31,13 +31,25 @@ int brk(void* newend)
void* sbrk(int increment)
{
char* old;
char* new;
if (increment == 0)
return current;
old = current;
if (brk(old + increment) < 0)
return OUT_OF_MEMORY;
new = old + increment;
if ((increment > 0) && (new <= old))
goto out_of_memory;
else if ((increment < 0) && (new >= old))
goto out_of_memory;
if (brk(new) < 0)
goto out_of_memory;
return old;
out_of_memory:
errno = ENOMEM;
return OUT_OF_MEMORY;
}