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-rw-r--r--disasm.c2
-rw-r--r--opcode.h3
-rw-r--r--programs/sub-suite/declare.s3
-rw-r--r--programs/sub-suite/subeditor.s12
-rw-r--r--sux.c24
-rw-r--r--sux.h21
-rw-r--r--test/add-sub.s6
-rw-r--r--test/getramsize.s2
-rw-r--r--test/hello-world.s3
-rw-r--r--test/load-store.s2
-rw-r--r--test/popcnt.s2
-rw-r--r--test/popcnt2.s2
-rw-r--r--test/rotate.s2
-rw-r--r--test/stack-frame.s3
-rw-r--r--test/subroutine.s2
-rw-r--r--test/test-stack.s3
16 files changed, 42 insertions, 50 deletions
diff --git a/disasm.c b/disasm.c
index da468dd..3465f38 100644
--- a/disasm.c
+++ b/disasm.c
@@ -14,7 +14,7 @@ void print_regs(struct sux *cpu, uint8_t lines, uint8_t thread) {
wprintw(scr, ", b: $%016"PRIX64, cpu->b);
wprintw(scr, ", x: $%016"PRIX64, cpu->x);
wprintw(scr, ", y: $%016"PRIX64, cpu->y);
- wprintw(scr, ", sp: $%04X", cpu->sp);
+ wprintw(scr, ", sp: $%"PRIX64, cpu->sp);
wprintw(scr, ", ps: $%02X", cpu->ps.u8[thread]);
wprintw(scr, ", inst: ");
}
diff --git a/opcode.h b/opcode.h
index cd883d4..1c11ca5 100644
--- a/opcode.h
+++ b/opcode.h
@@ -56,8 +56,7 @@ struct sux {
union reg ps; /* The processor status register. */
uint64_t a, b, y, x; /* Registers A, B, X, and Y. */
uint64_t pc; /* Program counter. */
- uint16_t sp; /* Stack pointer. */
- uint16_t stk_st; /* Starting address of each threads stack. */
+ uint64_t sp; /* Stack pointer. */
uint64_t clk; /* Number of clock cycles. */
uint8_t crt; /* Current running threads. */
};
diff --git a/programs/sub-suite/declare.s b/programs/sub-suite/declare.s
index 6a8c90f..7b419e2 100644
--- a/programs/sub-suite/declare.s
+++ b/programs/sub-suite/declare.s
@@ -102,6 +102,9 @@ LWSIZE = $1000 ; Linewrap table size, in bytes.
; Magic number used by findramend.
MAGIC = $AA
+; Size of the Stack.
+STKSIZE = $30000
+
; Heap related values.
HEAPORG = $30000 ; Starting point of the heap.
diff --git a/programs/sub-suite/subeditor.s b/programs/sub-suite/subeditor.s
index d98d068..addd64a 100644
--- a/programs/sub-suite/subeditor.s
+++ b/programs/sub-suite/subeditor.s
@@ -6,11 +6,19 @@
.org $8000
reset:
cps ; Reset the processor status register.
- ldx.w #$FFFF ; Reset the stack pointer.
+ ldx.d #$2FFFF ; Reset the stack pointer.
txs ;
ldy #0 ; Reset Y.
tyx ; Reset X.
jsr init_heap ; Initialize the heap.
+ inc step ;
+ tax ; Set the stack pointer to the end of RAM.
+ txs ;
+ sec ; Prepare for a non borrowing subtract.
+ sbc.d #STKSIZE ; Subtract the stack size, from the end of RAM.
+ sta.q heapend ; Save the end of the heap.
+ and #0 ; Reset A.
+ tax ; Reset X.
jsr init_tables ; Initialize the main tables.
; jsr test_free ;
jsr clr_scr ; Clear the screen.
@@ -27,8 +35,6 @@ init_heap:
jsr findramend ; Find the end of the heap.
plb.q ; Restore the value in B.
plx.q ; Restore the value in X.
- sta.q heapend ; Save the end of the heap.
- and #0 ; Reset A.
rts ; End of init_heap.
diff --git a/sux.c b/sux.c
index acd834e..adca16f 100644
--- a/sux.c
+++ b/sux.c
@@ -228,7 +228,6 @@ void *run(void *args) {
uint8_t rs = (prefix >> 4) & 3;
uint8_t size = (/***/1 << rs) - 1;
uint8_t check_io = (am != IMM);
- uint64_t sp = (cpu->sp & 0xFFFF) | (cpu->stk_st << 16);
#if debug && !bench
#if keypoll
pthread_mutex_lock(&mutex);
@@ -265,16 +264,16 @@ void *run(void *args) {
case PHB_IMP: push(cpu, cpu->b , size, thread); break; /* PusH B register to stack. */
case PHY_IMP: push(cpu, cpu->y , size, thread); break; /* PusH Y register to stack. */
case PHX_IMP: push(cpu, cpu->x , size, thread); break; /* PusH X register to stack. */
- case TAY_IMP: cpu->y = transfer(cpu, cpu->a, value.u64, opcode, prefix, thread); break; /* Transfer Accumulator to Y. */
- case TAX_IMP: cpu->x = transfer(cpu, cpu->a, value.u64, opcode, prefix, thread); break; /* Transfer Accumulator to Y. */
- case TYX_IMP: cpu->x = transfer(cpu, cpu->y, value.u64, opcode, prefix, thread); break; /* Transfer Y to X. */
- case TYA_IMP: cpu->a = transfer(cpu, cpu->y, value.u64, opcode, prefix, thread); break; /* Transfer Y to Accumulator. */
- case TXA_IMP: cpu->a = transfer(cpu, cpu->x, value.u64, opcode, prefix, thread); break; /* Transfer X to Accumulator. */
- case TXY_IMP: cpu->y = transfer(cpu, cpu->x, value.u64, opcode, prefix, thread); break; /* Transfer X to Y. */
- case TAB_IMP: cpu->b = transfer(cpu, cpu->a, value.u64, opcode, prefix, thread); break; /* Transfer Accumulator to B. */
- case TSX_IMP: cpu->x = transfer(cpu, sp, value.u64, opcode, prefix, thread); break; /* Transfer Stack pointer to X. */
- case TBA_IMP: cpu->a = transfer(cpu, cpu->b, value.u64, opcode, prefix, thread); break; /* Transfer B to Accumulator. */
- case TXS_IMM: cpu->sp = transfer(cpu, cpu->x, value.u64, opcode, prefix, thread); break; /* Transfer X to Stack pointer. */
+ case TAY_IMP: cpu->y = transfer(cpu, cpu->a , value.u64, thread); break; /* Transfer Accumulator to Y. */
+ case TAX_IMP: cpu->x = transfer(cpu, cpu->a , value.u64, thread); break; /* Transfer Accumulator to Y. */
+ case TYX_IMP: cpu->x = transfer(cpu, cpu->y , value.u64, thread); break; /* Transfer Y to X. */
+ case TYA_IMP: cpu->a = transfer(cpu, cpu->y , value.u64, thread); break; /* Transfer Y to Accumulator. */
+ case TXA_IMP: cpu->a = transfer(cpu, cpu->x , value.u64, thread); break; /* Transfer X to Accumulator. */
+ case TXY_IMP: cpu->y = transfer(cpu, cpu->x , value.u64, thread); break; /* Transfer X to Y. */
+ case TAB_IMP: cpu->b = transfer(cpu, cpu->a , value.u64, thread); break; /* Transfer Accumulator to B. */
+ case TSX_IMP: cpu->x = transfer(cpu, cpu->sp, value.u64, thread); break; /* Transfer Stack pointer to X. */
+ case TBA_IMP: cpu->a = transfer(cpu, cpu->b , value.u64, thread); break; /* Transfer B to Accumulator. */
+ case TXS_IMM: cpu->sp = transfer(cpu, cpu->x , value.u64, thread); break; /* Transfer X to Stack pointer. */
case BRA_REL: /* BRA Relative. */
case JMP_AB: /* JMP Absolute. */
case JMP_Z: /* JMP Zero Matrix. */
@@ -656,8 +655,7 @@ int main(int argc, char **argv) {
uint16_t vec = 0xFFC0;
uint8_t offset;
for (int i = 0; i < THREADS; i++) {
- thr[i].sx.sp = 0xFFFF;
- thr[i].sx.stk_st = i+1;
+ thr[i].sx.sp = (i << 16) | 0xFFFF;
offset = (i) ? ((i-1) << 3) : 0;
vec = (i) ? 0xFF50 : 0xFFC0;
thr[i].sx.a = 0;
diff --git a/sux.h b/sux.h
index 744a2cc..5bfdb44 100644
--- a/sux.h
+++ b/sux.h
@@ -141,8 +141,8 @@ static inline void write_value(struct sux *cpu, uint64_t value, uint64_t address
static inline uint64_t offset_addr(struct sux *cpu, uint64_t offset, uint8_t size, uint8_t inc_clk, uint8_t prefix) {
uint64_t of;
switch (prefix >> 6) {
- case 1: of = ((cpu->stk_st << 16) | cpu->sp); break;
- case 2: of = cpu->pc ; break;
+ case 1: of = cpu->sp; break;
+ case 2: of = cpu->pc; break;
}
#if getclk
cpu->clk += inc_clk;
@@ -278,30 +278,19 @@ static inline uint64_t adc(struct sux *cpu, uint64_t reg, uint64_t value, uint8_
return sum;
}
-static inline uint64_t transfer(struct sux *cpu, uint64_t src, uint64_t value, uint8_t opcode, uint8_t prefix, uint8_t thread) {
- switch (opcode) {
- case TXS_IMM:
- if (prefix == 0x13 && (value == thread+1 || value > 8)) {
- cpu->stk_st = value & 0xFF;
- cpu->stk_st += value << 16;
- cpu->pc+=2;
- }
- default: break;
- }
+static inline uint64_t transfer(struct sux *cpu, uint64_t src, uint64_t value, uint8_t thread) {
setflag(src == 0, Z);
setflag(src >> 63, N);
return src;
}
static inline void push(struct sux *cpu, uint64_t value, uint8_t size, uint8_t thread) {
- uint64_t sbr = (cpu->stk_st << 16);
- write_value(cpu, value, (sbr+cpu->sp)-size, size, 1, 0);
+ write_value(cpu, value, cpu->sp-size, size, 1, 0);
cpu->sp -= size+1;
}
static inline uint64_t pull(struct sux *cpu, uint8_t size, uint8_t thread) {
- uint64_t sbr = (cpu->stk_st << 16);
- uint64_t value = read_value(cpu, 0, sbr+cpu->sp+1, size, 1, 0);
+ uint64_t value = read_value(cpu, 0, cpu->sp+1, size, 1, 0);
cpu->sp += size+1;
return value;
}
diff --git a/test/add-sub.s b/test/add-sub.s
index 3dfdca4..d923cdc 100644
--- a/test/add-sub.s
+++ b/test/add-sub.s
@@ -6,7 +6,7 @@
.org 0
reset:
cps ; Clear the processor status register.
- ldx.w #$FFFF ; Reset the stack pointer.
+ ldx.d #$2FFFF ; Reset the stack pointer.
txs ;
and #0 ; Reset A.
tab ; Reset B.
@@ -15,11 +15,11 @@ up:
inc ; Increment the counter.
cmp #$FF ; Did the accumulator overflow?
bcs down ; Yes, so start decrementing.
- jmp up ; No, so keep incrementing.
+ bra up ; No, so keep incrementing.
down:
dec ; Did the accumulator underflow?
beq up ; Yes, so start incrementing.
- jmp down ; No, so keep decrementing.
+ bra down ; No, so keep decrementing.
.org $FFC0
.qword reset
diff --git a/test/getramsize.s b/test/getramsize.s
index cd2c69b..3cf9e38 100644
--- a/test/getramsize.s
+++ b/test/getramsize.s
@@ -12,7 +12,7 @@ ptr1:
.org $8000
reset:
cps ; Boilerplate reset code.
- ldx.w #$FFFF ;
+ ldx.d #$2FFFF ;
txs ;
and #0 ; Reset A.
tax ;
diff --git a/test/hello-world.s b/test/hello-world.s
index f3b540a..cf2d2a8 100644
--- a/test/hello-world.s
+++ b/test/hello-world.s
@@ -19,7 +19,7 @@ buffer:
.org $8000
reset:
cps ; Reset the processor status.
- ldx.w #$FFFF ; Set up the stack pointer.
+ ldx.d #$2FFFF ; Set up the stack pointer.
txs ; Reset the stack pointer.
; Start of main program.
@@ -65,4 +65,3 @@ spin:
.qword spin
a
d
-
diff --git a/test/load-store.s b/test/load-store.s
index 60a5a8f..abb7e74 100644
--- a/test/load-store.s
+++ b/test/load-store.s
@@ -2,7 +2,7 @@
reset:
cps
- ldx.w #$FFFF
+ ldx.d #$2FFFF
txs
@clear:
and #0
diff --git a/test/popcnt.s b/test/popcnt.s
index 7682653..cdb71c5 100644
--- a/test/popcnt.s
+++ b/test/popcnt.s
@@ -22,7 +22,7 @@ popcnt:
reset:
cps ; Boilerplate reset code.
- ldx.w #$FFFF ;
+ ldx.d #$2FFFF ;
txs ;
and #0 ; Reset A.
tab ; Reset B.
diff --git a/test/popcnt2.s b/test/popcnt2.s
index 503b074..5739fb7 100644
--- a/test/popcnt2.s
+++ b/test/popcnt2.s
@@ -19,7 +19,7 @@ popcnt:
reset:
cps ; Boilerplate reset code.
- ldx.w #$FFFF ;
+ ldx.d #$2FFFF ;
txs ;
and #0 ; Reset A.
tab ; Reset B.
diff --git a/test/rotate.s b/test/rotate.s
index 6115e94..90f16ba 100644
--- a/test/rotate.s
+++ b/test/rotate.s
@@ -9,7 +9,7 @@ tmp:
.org $8000
reset:
cps ;
- ldx.w #$FFFF ;
+ ldx.d #$2FFFF ;
txs ;
and #0 ;
tax ;
diff --git a/test/stack-frame.s b/test/stack-frame.s
index 0f631b9..fefb3d0 100644
--- a/test/stack-frame.s
+++ b/test/stack-frame.s
@@ -8,7 +8,7 @@ var:
.org $8000
reset:
cps ;
- ldx.w #$FFFF ;
+ ldx.d #$2FFFF ;
txs ;
lda #0 ;
tay ;
@@ -35,4 +35,3 @@ a
;v
;q
d
-
diff --git a/test/subroutine.s b/test/subroutine.s
index b7d8d17..e06ac48 100644
--- a/test/subroutine.s
+++ b/test/subroutine.s
@@ -13,7 +13,7 @@ buf:
.org $8000
reset:
cps ; Reset the processor status register.
- ldx.w #$FFFF ; Reset the stack pointer.
+ ldx.d #$2FFFF ; Reset the stack pointer.
txs ;
@bench:
tay ; Reset Y.
diff --git a/test/test-stack.s b/test/test-stack.s
index a63f54a..c3160d3 100644
--- a/test/test-stack.s
+++ b/test/test-stack.s
@@ -1,6 +1,6 @@
init:
cps
- ldx.w #$FFFF
+ ldx.d #$2FFFF
txs
tax
loop:
@@ -22,4 +22,3 @@ loop:
a
done
-
generated by cgit v1.2.3-13-gbd6f (git 2.30.0) at 2024-12-26 05:50:01 +0000