;; Originally from GBDK by Pascal Felber.
.area _CODE
-__mulschar::
-__muluchar::
- push bc
- lda hl,4(sp)
- ld c,(hl)
- inc hl
- ld e,(hl)
- call .mulu8
- ld e,l
- pop bc
- ret
+__mulschar_rrx_s::
+ ld hl,#2
+ add hl,sp
-__mulsint::
-__muluint::
- push bc
- lda hl,4(sp)
- ld c,(hl)
- inc hl
- ld b,(hl)
- inc hl
- ld e,(hl)
- inc hl
- ld d,(hl)
- call .mulu16
+ ld e,(hl)
+ inc hl
+ ld l,(hl)
- ld e,l
- ld d,h
- pop bc
- ret
-
-.mul8:
-.mulu8:
- LD B,#0x00 ; Sign extend is not necessary with mul
- LD D,B
- ; Fall through
+ ;; Fall through
+__mulschar_rrx_hds::
+ ;; Need to sign extend before going in.
+ ld c,l
+
+ ld a,l
+ rla
+ sbc a,a
+ ld b,a
+
+ ld a,e
+ rla
+ sbc a,a
+ ld d,a
+
+ jp .mul16
+
+__muluchar_rrx_s::
+ ld hl,#2
+ add hl,sp
+
+ ld e,(hl)
+
+ inc hl
+ ld c,(hl)
+
+ ;; Clear the top
+ xor a
+ ld d,a
+ ld b,a
+
+ jp .mulu16
+
+__mulsint_rrx_s::
+__muluint_rrx_s::
+ ld hl,#2
+ add hl,sp
+
+ ld e,(hl)
+ inc hl
+ ld d,(hl)
+ inc hl
+ ld a,(hl)
+ inc hl
+ ld h,(hl)
+ ld l,a
+
+ ;; Fall through
+
+__muluchar_rrx_hds::
+__mulsint_rrx_hds::
+__muluint_rrx_hds::
+ ;; Parameters:
+ ;; HL, DE (left, right irrelivent)
+ ld b,h
+ ld c,l
;; 16-bit multiplication
;;
;; DE = less significant word of product
;;
;; Register used: AF,BC,DE,HL
-.mul16::
-.mulu16::
- LD HL,#0x00 ; Product = 0
- LD A,#15 ; Count = bit length - 1
- ;; Shift-and-add algorithm
- ;; If MSB of multiplier is 1, add multiplicand to partial product
- ;; Shift partial product, multiplier left 1 bit
-.mlp:
- SLA E ; Shift multiplier left 1 bit
- RL D
- JR NC,.mlp1 ; Jump if MSB of multiplier = 0
- ADD HL,BC ; Add multiplicand to partial product
-.mlp1:
- ADD HL,HL ; Shift partial product left
- DEC A
- JR NZ,.mlp ; Continue until count = 0
- ;; Add multiplicand one last time if MSB of multiplier is 1
- BIT 7,D ; Get MSB of multiplier
- JR Z,.mend ; Exit if MSB of multiplier is 0
- ADD HL,BC ; Add multiplicand to product
-.mend:
- RET ; HL = result
+.mul16:
+.mulu16:
+ ld hl,#0
+ ld a,b
+ ; ld c,c
+ ld b,#16
+ ;; Optimise for the case when this side has 8 bits of data or
+ ;; less. This is often the case with support address calls.
+ or a
+ jp nz,1$
+
+ ld b,#8
+ ld a,c
+1$:
+ ;; Taken from z88dk, which originally borrowed from the
+ ;; Spectrum rom.
+ add hl,hl
+ rl c
+ rla ;DLE 27/11/98
+ jr nc,2$
+ add hl,de
+2$:
+ dec b
+ jr nz,1$
+ ret
static struct
{
ASM_TYPE asmType;
+ /* determine if we can register a parameter */
+ int regParams;
}
_G;
z80_opts.sub = SUB_GBZ80;
}
-static int regParmFlg = 0; /* determine if we can register a parameter */
-
static void
_reset_regparm ()
{
- regParmFlg = 0;
+ _G.regParams = 0;
}
static int
}
else
{
- if (regParmFlg == 2)
+ if (_G.regParams == 2)
{
return FALSE;
}
else
{
- regParmFlg++;
+ _G.regParams++;
return TRUE;
}
}
options.noRegParams = 1;
/* Default code and data locations. */
options.code_loc = 0x200;
- options.data_loc = 0x8000;
+
+ if (IS_GB)
+ {
+ options.data_loc = 0xC000;
+ }
+ else
+ {
+ options.data_loc = 0x8000;
+ }
optimize.global_cse = 1;
optimize.label1 = 1;
{
char buffer[128];
- if (TARGET_IS_Z80)
- {
- sprintf(buffer, "%s_rr%s_%s", original,
- options.profile ? "f" : "x",
- options.noRegParams ? "s" : "bds"
- );
- }
- else
- {
- strcpy(buffer, original);
- }
+ sprintf(buffer, "%s_rr%s_%s", original,
+ options.profile ? "f" : "x",
+ options.noRegParams ? "s" : "bds"
+ );
return gc_strdup(buffer);
}
_getRegName (struct regs *reg)
{
if (reg)
- return reg->name;
+ {
+ return reg->name;
+ }
assert (0);
return "err";
}
$l is the list of extra options that should be there somewhere...
MUST be terminated with a NULL.
*/
+static const char *_z80_asmCmd[] =
+{
+ "as-z80",
+ "-plosgff",
+ "$1.o",
+ "$1.asm",
+ NULL
+};
+
static const char *_z80_linkCmd[] =
{
"link-z80",
NULL
};
+static const char *_gbz80_asmCmd[] =
+{
+ "as-gbz80",
+ "-plosgff",
+ "$1.o",
+ "$1.asm",
+ NULL
+};
+
+static const char *_gbz80_linkCmd[] =
+{
+ "link-z80",
+ "-n", // Don't echo output
+ "-c", // Command line input
+ "--", // Again, command line input...
+ "-b_CODE=0x200", // Code starts at 0x200
+ "-b_DATA=0xC000", // RAM starts at 0xC000
+ "-j", // Output a symbol file as well
+ "-k" SDCC_LIB_DIR "/gbz80", // Library path
+ "-lgbz80.lib", // Library to use
+ "-z", // Output Gameboy image
+ "$1.gb", // Output to
+ SDCC_LIB_DIR "/gbz80/crt0.o",// Link in crt0 first
+ "$1.o", // Actual code
+ NULL
+};
+
/* sprintf that appends to the string. */
static void
_saprintf(char *pinto, const char *format, ...)
}
static void
-_z80_link(void)
+_link(const char *portName, const char *portExt, const char *portOutputType)
{
int i;
// PENDING
char buffer[2048];
sprintf(buffer,
- "link-z80 "
+ "link-%s "
"-n " // Don't echo output
"-c " // Command line input
"-- " // Again, command line input...
"-b_CODE=0x%04X " // Code starts at 0x200
"-b_DATA=0x%04X " // RAM starts at 0x8000
"-j ", // Output a symbol file as well
+ portName,
options.code_loc,
options.data_loc
);
// Add the standard lib in.
if (options.nostdlib == FALSE) {
_saprintf(buffer,
- "-k" SDCC_LIB_DIR "/z80 " // Library path
- "-lz80.lib " // Library to use
+ "-k" SDCC_LIB_DIR "/%s " // Library path
+ "-l%s.lib ", // Library to use
+ portName, portName
);
}
}
_saprintf(buffer,
- "-i " // Output Intel IHX
- "%s.ihx ", // Output to
- srcFileName
+ "-%s " // Output type
+ "%s.%s ", // Output to
+ portOutputType, srcFileName, portExt
);
if (options.nostdlib == FALSE) {
_saprintf(buffer,
- SDCC_LIB_DIR "/z80/crt0.o " // Link in crt0 first
+ SDCC_LIB_DIR "/%s/crt0.o ", // Link in crt0 first
+ portName
);
}
}
}
-static const char *_z80_asmCmd[] =
-{
- "as-z80", "-plosgff", "$1.o", "$1.asm", NULL
-};
-
-/** $1 is always the basename.
- $2 is always the output file.
- $3 varies
- $l is the list of extra options that should be there somewhere...
- MUST be terminated with a NULL.
-*/
-static const char *_gbz80_linkCmd[] =
+static void
+_z80_link(void)
{
- // PENDING
- "link-gbz80", "-nf", "$1", NULL
-};
+ _link("z80", "ihx", "i");
+}
-static const char *_gbz80_asmCmd[] =
+static void
+_gbz80_link(void)
{
- "as-gbz80", "-plosgff", "$1.o", "$1.asm", NULL
-};
+ _link("gbz80", "gb", "z");
+}
/* Globals */
PORT z80_port =
_gbz80_asmCmd,
"-plosgff", /* Options with debug */
"-plosgff", /* Options without debug */
- 1,
+ 0,
".asm"
},
{
_gbz80_linkCmd,
- NULL,
+ _gbz80_link,
".o"
},
{
_gbz80_defaultRules
},
{
- /* Sizes: char, short, int, long, ptr, fptr, gptr, bit, float, max */
- 1, 1, 2, 4, 2, 2, 2, 1, 4, 4
+ /* Sizes: char, short, int, long, ptr, fptr, gptr, bit, float, max */
+ 1, 2, 2, 4, 2, 2, 2, 1, 4, 4
},
{
"XSEG",
_reset_regparm,
_reg_parm,
_process_pragma,
- NULL,
+ _mangleSupportFunctionName,
TRUE,
0, /* leave lt */
0, /* leave gt */
projects / fw / sdcc / commitdiff