commit 59ea5c0a1ac9a942416ee163e227b3ab57049809
parent a05fc3ae5dce17f4702bff5ca81a0e98d5177ec5
Author: neauoire <aliceffekt@gmail.com>
Date: Wed, 4 Aug 2021 20:06:46 -0700
Added static to uxn opcodes
Diffstat:
4 files changed, 100 insertions(+), 103 deletions(-)
diff --git a/etc/mkuxn-fast.lua b/etc/mkuxn-fast.lua
@@ -322,7 +322,6 @@ uxn_eval(Uxn *u, Uint16 vec)
if(u->dev[0].dat[0xf])
return 0;
u->ram.ptr = vec;
- if(u->wst.ptr > 0xf8) u->wst.ptr = 0xf8;
while(u->ram.ptr) {
instr = u->ram.dat[u->ram.ptr++];
switch(instr) {
diff --git a/etc/mkuxn-fast.moon b/etc/mkuxn-fast.moon
@@ -231,7 +231,6 @@ uxn_eval(Uxn *u, Uint16 vec)
if(u->dev[0].dat[0xf])
return 0;
u->ram.ptr = vec;
- if(u->wst.ptr > 0xf8) u->wst.ptr = 0xf8;
while(u->ram.ptr) {
instr = u->ram.dat[u->ram.ptr++];
switch(instr) {
diff --git a/src/uxn-fast.c b/src/uxn-fast.c
@@ -45,7 +45,6 @@ uxn_eval(Uxn *u, Uint16 vec)
if(u->dev[0].dat[0xf])
return 0;
u->ram.ptr = vec;
- if(u->wst.ptr > 0xf8) u->wst.ptr = 0xf8;
while(u->ram.ptr) {
instr = u->ram.dat[u->ram.ptr++];
switch(instr) {
diff --git a/src/uxn.c b/src/uxn.c
@@ -12,95 +12,98 @@ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE.
*/
+#define MODE_RETURN 0x40
+#define MODE_KEEP 0x80
+
#pragma mark - Operations
/* clang-format off */
-void push8(Stack *s, Uint8 a) { if(s->ptr == 0xff) { s->error = 2; return; } s->dat[s->ptr++] = a; }
-Uint8 pop8_keep(Stack *s) { if(s->kptr == 0) { s->error = 1; return 0; } return s->dat[--s->kptr]; }
-Uint8 pop8_nokeep(Stack *s) { if(s->ptr == 0) { s->error = 1; return 0; } return s->dat[--s->ptr]; }
+static void push8(Stack *s, Uint8 a) { if(s->ptr == 0xff) { s->error = 2; return; } s->dat[s->ptr++] = a; }
+static Uint8 pop8_keep(Stack *s) { if(s->kptr == 0) { s->error = 1; return 0; } return s->dat[--s->kptr]; }
+static Uint8 pop8_nokeep(Stack *s) { if(s->ptr == 0) { s->error = 1; return 0; } return s->dat[--s->ptr]; }
static Uint8 (*pop8)(Stack *s);
-void mempoke8(Uint8 *m, Uint16 a, Uint8 b) { m[a] = b; }
-Uint8 mempeek8(Uint8 *m, Uint16 a) { return m[a]; }
-void devpoke8(Device *d, Uint8 a, Uint8 b) { d->dat[a & 0xf] = b; d->talk(d, a & 0x0f, 1); }
-Uint8 devpeek8(Device *d, Uint8 a) { d->talk(d, a & 0x0f, 0); return d->dat[a & 0xf]; }
-void push16(Stack *s, Uint16 a) { push8(s, a >> 8); push8(s, a); }
-Uint16 pop16(Stack *s) { Uint8 a = pop8(s), b = pop8(s); return a + (b << 8); }
+static void mempoke8(Uint8 *m, Uint16 a, Uint8 b) { m[a] = b; }
+static Uint8 mempeek8(Uint8 *m, Uint16 a) { return m[a]; }
+static void devpoke8(Device *d, Uint8 a, Uint8 b) { d->dat[a & 0xf] = b; d->talk(d, a & 0x0f, 1); }
+static Uint8 devpeek8(Device *d, Uint8 a) { d->talk(d, a & 0x0f, 0); return d->dat[a & 0xf]; }
+static void push16(Stack *s, Uint16 a) { push8(s, a >> 8); push8(s, a); }
+static Uint16 pop16(Stack *s) { Uint8 a = pop8(s), b = pop8(s); return a + (b << 8); }
void mempoke16(Uint8 *m, Uint16 a, Uint16 b) { mempoke8(m, a, b >> 8); mempoke8(m, a + 1, b); }
Uint16 mempeek16(Uint8 *m, Uint16 a) { return (mempeek8(m, a) << 8) + mempeek8(m, a + 1); }
-void devpoke16(Device *d, Uint8 a, Uint16 b) { devpoke8(d, a, b >> 8); devpoke8(d, a + 1, b); }
-Uint16 devpeek16(Device *d, Uint16 a) { return (devpeek8(d, a) << 8) + devpeek8(d, a + 1); }
+static void devpoke16(Device *d, Uint8 a, Uint16 b) { devpoke8(d, a, b >> 8); devpoke8(d, a + 1, b); }
+static Uint16 devpeek16(Device *d, Uint16 a) { return (devpeek8(d, a) << 8) + devpeek8(d, a + 1); }
/* Stack */
-void op_brk(Uxn *u) { u->ram.ptr = 0; }
-void op_nop(Uxn *u) { (void)u; }
-void op_lit(Uxn *u) { push8(u->src, mempeek8(u->ram.dat, u->ram.ptr++)); }
-void op_pop(Uxn *u) { pop8(u->src); }
-void op_dup(Uxn *u) { Uint8 a = pop8(u->src); push8(u->src, a); push8(u->src, a); }
-void op_swp(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, a); push8(u->src, b); }
-void op_ovr(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b); push8(u->src, a); push8(u->src, b); }
-void op_rot(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src), c = pop8(u->src); push8(u->src, b); push8(u->src, a); push8(u->src, c); }
+static void op_brk(Uxn *u) { u->ram.ptr = 0; }
+static void op_nop(Uxn *u) { (void)u; }
+static void op_lit(Uxn *u) { push8(u->src, mempeek8(u->ram.dat, u->ram.ptr++)); }
+static void op_pop(Uxn *u) { pop8(u->src); }
+static void op_dup(Uxn *u) { Uint8 a = pop8(u->src); push8(u->src, a); push8(u->src, a); }
+static void op_swp(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, a); push8(u->src, b); }
+static void op_ovr(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b); push8(u->src, a); push8(u->src, b); }
+static void op_rot(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src), c = pop8(u->src); push8(u->src, b); push8(u->src, a); push8(u->src, c); }
/* Logic */
-void op_equ(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b == a); }
-void op_neq(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b != a); }
-void op_gth(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b > a); }
-void op_lth(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b < a); }
-void op_jmp(Uxn *u) { Uint8 a = pop8(u->src); u->ram.ptr += (Sint8)a; }
-void op_jnz(Uxn *u) { Uint8 a = pop8(u->src); if(pop8(u->src)) u->ram.ptr += (Sint8)a; }
-void op_jsr(Uxn *u) { Uint8 a = pop8(u->src); push16(u->dst, u->ram.ptr); u->ram.ptr += (Sint8)a; }
-void op_sth(Uxn *u) { Uint8 a = pop8(u->src); push8(u->dst, a); }
+static void op_equ(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b == a); }
+static void op_neq(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b != a); }
+static void op_gth(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b > a); }
+static void op_lth(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b < a); }
+static void op_jmp(Uxn *u) { Uint8 a = pop8(u->src); u->ram.ptr += (Sint8)a; }
+static void op_jnz(Uxn *u) { Uint8 a = pop8(u->src); if(pop8(u->src)) u->ram.ptr += (Sint8)a; }
+static void op_jsr(Uxn *u) { Uint8 a = pop8(u->src); push16(u->dst, u->ram.ptr); u->ram.ptr += (Sint8)a; }
+static void op_sth(Uxn *u) { Uint8 a = pop8(u->src); push8(u->dst, a); }
/* Memory */
-void op_pek(Uxn *u) { Uint8 a = pop8(u->src); push8(u->src, mempeek8(u->ram.dat, a)); }
-void op_pok(Uxn *u) { Uint8 a = pop8(u->src); Uint8 b = pop8(u->src); mempoke8(u->ram.dat, a, b); }
-void op_ldr(Uxn *u) { Uint8 a = pop8(u->src); push8(u->src, mempeek8(u->ram.dat, u->ram.ptr + (Sint8)a)); }
-void op_str(Uxn *u) { Uint8 a = pop8(u->src); Uint8 b = pop8(u->src); mempoke8(u->ram.dat, u->ram.ptr + (Sint8)a, b); }
-void op_lda(Uxn *u) { Uint16 a = pop16(u->src); push8(u->src, mempeek8(u->ram.dat, a)); }
-void op_sta(Uxn *u) { Uint16 a = pop16(u->src); Uint8 b = pop8(u->src); mempoke8(u->ram.dat, a, b); }
-void op_dei(Uxn *u) { Uint8 a = pop8(u->src); push8(u->src, devpeek8(&u->dev[a >> 4], a)); }
-void op_deo(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); devpoke8(&u->dev[a >> 4], a, b); }
+static void op_pek(Uxn *u) { Uint8 a = pop8(u->src); push8(u->src, mempeek8(u->ram.dat, a)); }
+static void op_pok(Uxn *u) { Uint8 a = pop8(u->src); Uint8 b = pop8(u->src); mempoke8(u->ram.dat, a, b); }
+static void op_ldr(Uxn *u) { Uint8 a = pop8(u->src); push8(u->src, mempeek8(u->ram.dat, u->ram.ptr + (Sint8)a)); }
+static void op_str(Uxn *u) { Uint8 a = pop8(u->src); Uint8 b = pop8(u->src); mempoke8(u->ram.dat, u->ram.ptr + (Sint8)a, b); }
+static void op_lda(Uxn *u) { Uint16 a = pop16(u->src); push8(u->src, mempeek8(u->ram.dat, a)); }
+static void op_sta(Uxn *u) { Uint16 a = pop16(u->src); Uint8 b = pop8(u->src); mempoke8(u->ram.dat, a, b); }
+static void op_dei(Uxn *u) { Uint8 a = pop8(u->src); push8(u->src, devpeek8(&u->dev[a >> 4], a)); }
+static void op_deo(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); devpoke8(&u->dev[a >> 4], a, b); }
/* Arithmetic */
-void op_add(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b + a); }
-void op_sub(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b - a); }
-void op_mul(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b * a); }
-void op_div(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); if(a == 0) { u->src->error = 3; a = 1; } push8(u->src, b / a); }
-void op_and(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b & a); }
-void op_ora(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b | a); }
-void op_eor(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b ^ a); }
-void op_sft(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b >> (a & 0x07) << ((a & 0x70) >> 4)); }
+static void op_add(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b + a); }
+static void op_sub(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b - a); }
+static void op_mul(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b * a); }
+static void op_div(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); if(a == 0) { u->src->error = 3; a = 1; } push8(u->src, b / a); }
+static void op_and(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b & a); }
+static void op_ora(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b | a); }
+static void op_eor(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b ^ a); }
+static void op_sft(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b >> (a & 0x07) << ((a & 0x70) >> 4)); }
/* Stack */
-void op_lit16(Uxn *u) { push16(u->src, mempeek16(u->ram.dat, u->ram.ptr++)); u->ram.ptr++; }
-void op_pop16(Uxn *u) { pop16(u->src); }
-void op_dup16(Uxn *u) { Uint16 a = pop16(u->src); push16(u->src, a); push16(u->src, a); }
-void op_swp16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, a); push16(u->src, b); }
-void op_ovr16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, b); push16(u->src, a); push16(u->src, b); }
-void op_rot16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src), c = pop16(u->src); push16(u->src, b); push16(u->src, a); push16(u->src, c); }
+static void op_lit16(Uxn *u) { push16(u->src, mempeek16(u->ram.dat, u->ram.ptr++)); u->ram.ptr++; }
+static void op_pop16(Uxn *u) { pop16(u->src); }
+static void op_dup16(Uxn *u) { Uint16 a = pop16(u->src); push16(u->src, a); push16(u->src, a); }
+static void op_swp16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, a); push16(u->src, b); }
+static void op_ovr16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, b); push16(u->src, a); push16(u->src, b); }
+static void op_rot16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src), c = pop16(u->src); push16(u->src, b); push16(u->src, a); push16(u->src, c); }
/* Logic(16-bits) */
-void op_equ16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push8(u->src, b == a); }
-void op_neq16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push8(u->src, b != a); }
-void op_gth16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push8(u->src, b > a); }
-void op_lth16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push8(u->src, b < a); }
-void op_jmp16(Uxn *u) { u->ram.ptr = pop16(u->src); }
-void op_jnz16(Uxn *u) { Uint16 a = pop16(u->src); if(pop8(u->src)) u->ram.ptr = a; }
-void op_jsr16(Uxn *u) { push16(u->dst, u->ram.ptr); u->ram.ptr = pop16(u->src); }
-void op_sth16(Uxn *u) { Uint16 a = pop16(u->src); push16(u->dst, a); }
+static void op_equ16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push8(u->src, b == a); }
+static void op_neq16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push8(u->src, b != a); }
+static void op_gth16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push8(u->src, b > a); }
+static void op_lth16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push8(u->src, b < a); }
+static void op_jmp16(Uxn *u) { u->ram.ptr = pop16(u->src); }
+static void op_jnz16(Uxn *u) { Uint16 a = pop16(u->src); if(pop8(u->src)) u->ram.ptr = a; }
+static void op_jsr16(Uxn *u) { push16(u->dst, u->ram.ptr); u->ram.ptr = pop16(u->src); }
+static void op_sth16(Uxn *u) { Uint16 a = pop16(u->src); push16(u->dst, a); }
/* Memory(16-bits) */
-void op_pek16(Uxn *u) { Uint8 a = pop8(u->src); push16(u->src, mempeek16(u->ram.dat, a)); }
-void op_pok16(Uxn *u) { Uint8 a = pop8(u->src); Uint16 b = pop16(u->src); mempoke16(u->ram.dat, a, b); }
-void op_ldr16(Uxn *u) { Uint8 a = pop8(u->src); push16(u->src, mempeek16(u->ram.dat, u->ram.ptr + (Sint8)a)); }
-void op_str16(Uxn *u) { Uint8 a = pop8(u->src); Uint16 b = pop16(u->src); mempoke16(u->ram.dat, u->ram.ptr + (Sint8)a, b); }
-void op_lda16(Uxn *u) { Uint16 a = pop16(u->src); push16(u->src, mempeek16(u->ram.dat, a)); }
-void op_sta16(Uxn *u) { Uint16 a = pop16(u->src); Uint16 b = pop16(u->src); mempoke16(u->ram.dat, a, b); }
-void op_dei16(Uxn *u) { Uint8 a = pop8(u->src); push16(u->src, devpeek16(&u->dev[a >> 4], a)); }
-void op_deo16(Uxn *u) { Uint8 a = pop8(u->src); Uint16 b = pop16(u->src); devpoke16(&u->dev[a >> 4], a, b); }
+static void op_pek16(Uxn *u) { Uint8 a = pop8(u->src); push16(u->src, mempeek16(u->ram.dat, a)); }
+static void op_pok16(Uxn *u) { Uint8 a = pop8(u->src); Uint16 b = pop16(u->src); mempoke16(u->ram.dat, a, b); }
+static void op_ldr16(Uxn *u) { Uint8 a = pop8(u->src); push16(u->src, mempeek16(u->ram.dat, u->ram.ptr + (Sint8)a)); }
+static void op_str16(Uxn *u) { Uint8 a = pop8(u->src); Uint16 b = pop16(u->src); mempoke16(u->ram.dat, u->ram.ptr + (Sint8)a, b); }
+static void op_lda16(Uxn *u) { Uint16 a = pop16(u->src); push16(u->src, mempeek16(u->ram.dat, a)); }
+static void op_sta16(Uxn *u) { Uint16 a = pop16(u->src); Uint16 b = pop16(u->src); mempoke16(u->ram.dat, a, b); }
+static void op_dei16(Uxn *u) { Uint8 a = pop8(u->src); push16(u->src, devpeek16(&u->dev[a >> 4], a)); }
+static void op_deo16(Uxn *u) { Uint8 a = pop8(u->src); Uint16 b = pop16(u->src); devpoke16(&u->dev[a >> 4], a, b); }
/* Arithmetic(16-bits) */
-void op_add16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, b + a); }
-void op_sub16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, b - a); }
-void op_mul16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, b * a); }
-void op_div16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); if(a == 0) { u->src->error = 3; a = 1; } push16(u->src, b / a); }
-void op_and16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, b & a); }
-void op_ora16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, b | a); }
-void op_eor16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, b ^ a); }
-void op_sft16(Uxn *u) { Uint8 a = pop8(u->src); Uint16 b = pop16(u->src); push16(u->src, b >> (a & 0x0f) << ((a & 0xf0) >> 4)); }
+static void op_add16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, b + a); }
+static void op_sub16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, b - a); }
+static void op_mul16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, b * a); }
+static void op_div16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); if(a == 0) { u->src->error = 3; a = 1; } push16(u->src, b / a); }
+static void op_and16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, b & a); }
+static void op_ora16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, b | a); }
+static void op_eor16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->src, b ^ a); }
+static void op_sft16(Uxn *u) { Uint8 a = pop8(u->src); Uint16 b = pop16(u->src); push16(u->src, b >> (a & 0x0f) << ((a & 0xf0) >> 4)); }
-void (*ops[])(Uxn *u) = {
+static void (*ops[])(Uxn *u) = {
op_brk, op_lit, op_nop, op_pop, op_dup, op_swp, op_ovr, op_rot,
op_equ, op_neq, op_gth, op_lth, op_jmp, op_jnz, op_jsr, op_sth,
op_pek, op_pok, op_ldr, op_str, op_lda, op_sta, op_dei, op_deo,
@@ -117,37 +120,34 @@ void (*ops[])(Uxn *u) = {
#pragma mark - Core
int
-uxn_step(Uxn *u, Uint8 instr)
-{
- Uint8 op = instr & 0x3f, freturn = instr & 0x40, fkeep = instr & 0x80;
- u->src = freturn ? &u->rst : &u->wst;
- u->dst = freturn ? &u->wst : &u->rst;
- if(fkeep) {
- pop8 = pop8_keep;
- u->src->kptr = u->src->ptr;
- } else
- pop8 = pop8_nokeep;
- /* run */
- (*ops[op])(u);
- if(u->wst.error)
- return uxn_halt(u, u->wst.error, "Working-stack", instr);
- if(u->rst.error)
- return uxn_halt(u, u->rst.error, "Return-stack", instr);
- return 1;
-}
-
-int
uxn_eval(Uxn *u, Uint16 vec)
{
if(u->dev[0].dat[0xf])
return 0;
u->ram.ptr = vec;
- u->wst.error = 0;
- u->rst.error = 0;
- if(u->wst.ptr > 0xf8) u->wst.ptr = 0xf8;
- while(u->ram.ptr)
- if(!uxn_step(u, u->ram.dat[u->ram.ptr++]))
- return 0;
+ while(u->ram.ptr) {
+ Uint8 instr = u->ram.dat[u->ram.ptr++];
+ /* Return Mode */
+ if(instr & MODE_RETURN) {
+ u->src = &u->rst;
+ u->dst = &u->wst;
+ } else {
+ u->src = &u->wst;
+ u->dst = &u->rst;
+ }
+ /* Keep Mode */
+ if(instr & MODE_KEEP) {
+ pop8 = pop8_keep;
+ u->src->kptr = u->src->ptr;
+ } else {
+ pop8 = pop8_nokeep;
+ }
+ (*ops[instr & 0x3f])(u);
+ if(u->wst.error)
+ return uxn_halt(u, u->wst.error, "Working-stack", instr);
+ if(u->rst.error)
+ return uxn_halt(u, u->rst.error, "Return-stack", instr);
+ }
return 1;
}
