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authormrb0nk500 <b0nk@b0nk.xyz>2019-11-11 20:43:05 -0500
committermrb0nk500 <b0nk@b0nk.xyz>2019-11-11 20:43:05 -0500
commita5c33b00e110928e86fa08f91f8ccab86b9a9eb1 (patch)
treef5a9f2c1ab9315cd49bfc09107f4f82392e4b456 /sux.c
parente3fc06b083598f244b3949e06d4ffbd3d2b235cc (diff)
Started work on simultanious multithreading, and branching.
Diffstat (limited to 'sux.c')
-rw-r--r--sux.c48
1 files changed, 46 insertions, 2 deletions
diff --git a/sux.c b/sux.c
index 43699d3..1efbc77 100644
--- a/sux.c
+++ b/sux.c
@@ -3,11 +3,13 @@
uint64_t a; /* Accumulator. */
uint64_t y; /* Y index. */
uint64_t x; /* X index. */
+uint8_t crt; /* Current Running Threads. */
+uint64_t pc[8]; /* Program counter. */
uint64_t ps; /* Processor status. */
-uint64_t alu(uint8_t opcode, uint64_t value) {
+int alu(uint8_t opcode, uint64_t value) {
uint64_t sum;
- uint8_t carry, vf;
+ uint8_t carry = 0, vf = 0;
switch(opcode) {
/* Add with carry. */
case ADC:
@@ -102,4 +104,46 @@ uint64_t alu(uint8_t opcode, uint64_t value) {
(a >> value) | (a << (64-value));
break;
}
+ ps |= vf;
+ ps |= carry;
+ return 1;
+}
+
+int threads(uint8_t opcode, uint64_t value) {
+ uint8_t t = value & 0xFF; /* This tells the CPU, which threads to start, or end. */
+ switch(opcode) {
+ /* Start Thread. */
+ case STT:
+ crt |= t;
+ for (uint8_t i = 0; i < 8; i++)
+ if ((t >> i) & 1)
+ pc[i] = value >> 8;
+ break;
+ /* End Thread. */
+ case ENT:
+ crt &= ~t;
+ for (uint8_t i = 0; i < 8; i++)
+ if ((t >> i) & 1)
+ pc[i] = 0;
+ break;
+ }
+}
+
+int branch(uint8_t opcode, uint64_t value, uint8_t thread) {
+ switch (opcode) {
+ /* Jump. */
+ case JMP:
+ pc[thread] = value;
+ break;
+ /* Jump to subroutine. */
+ case JSR:
+ pc[thread] = value;
+ pushaddr(value);
+ break;
+ /* Return from subroutine. */
+ case RTS:
+ pulladdr();
+ break;
+ }
+ }
}