added sbst programs

sbst_programs/alu.c

@@ -0,0 +1,80 @@
+#include <stdint.h>
+
+#define MISR_START() (*(volatile uint32_t *)0x40000000 = 1)
+#define MISR_STOP()  (*(volatile uint32_t *)0x40000000 = 0)
+#define SIM_FINISH() (*(volatile uint32_t *)0x20000000 = 1)
+volatile uint32_t sink;
+
+void trigger_untestable_counters() {
+    uint32_t cycle_low, cycle_high;
+
+    __asm__ volatile ("rdcycle %0" : "=r"(cycle_low));
+    __asm__ volatile ("rdcycleh %0" : "=r"(cycle_high));
+
+    sink = cycle_low ^ cycle_high;
+    sink = cycle_low + cycle_high;
+}
+
+void bomb_alu_full_coverage() {
+    volatile uint32_t p1 = 0xAAAAAAAA; // 10101010...
+    volatile uint32_t p2 = 0x55555555; // 01010101...
+    volatile uint32_t p3 = 0xFFFFFFFF; // 全 1
+    volatile uint32_t p4 = 0x80000000; // 仅最高位为 1 (符号位测试)
+    volatile uint32_t p5 = 0x00000001; // 仅最低位为 1
+
+    for (int i = 0; i < 12; i++) {
+        sink = p1 + p2;        // 加法
+        sink = p3 + p5;
+        sink = p3 + p4;
+        sink = p1 - p2;        // 减法
+        sink = p5 - p3;
+
+       volatile uint32_t sink1 = p3 - p5;
+        volatile uint32_t sink2;
+        for(int lop = 0; lop < 5 ; lop++){
+            sink2 = sink1 - p5;
+            sink1 = sink2 ^ 0xFFFFFFFF;
+        }
+        sink = sink1;
+
+        sink = p1 ^ p2;        // XOR
+        sink = p1 ^ p3;
+        sink = p2 ^ p3;
+        sink = p1 & p2;        // AND
+        sink = p3 & p2;
+        sink = p1 & p3;
+        sink = p1 | p2;        // OR
+        sink = p3 | p2;
+        sink = p1 | p3;
+
+        sink = p1 << i;                     // 逻辑左移 (SLL)
+        sink = p2 >> i;                     // 逻辑右移 (SRL)
+        sink = (int32_t)p4 >> i;            // 算术右移 (SRA)
+
+        sink = (int32_t)p1 < (int32_t)p2;   // 有符号比较 (Signed)
+        sink = p1 < p2;                     // 无符号比较 (Unsigned)
+
+        p1 = ~p1;
+        p2 = ~p2;
+        p4 = (p4 >> 1) | 0x80000000;
+        p5 = p5 << 1;
+    }
+}
+
+int main() {
+    sink = 0;
+
+    MISR_START();
+
+    for(int loop = 0; loop < 2; loop++) {
+        trigger_untestable_counters();
+        bomb_alu_full_coverage();
+    }
+
+    MISR_STOP();
+    SIM_FINISH();
+    while(1) {
+        __asm__ volatile ("nop");
+    }
+    return 0;
+}

sbst_programs/start.S

@@ -0,0 +1,14 @@
+/* start.S */
+.section .text
+.global _start
+
+_start:
+    /* 1. 初始化栈指针 (Stack Pointer) */
+    /* tb.v里内存大小是 4096 words (16KB) */
+    li sp, 0x4000 
+
+    call main
+
+    /* 3. 如果 main 返回了（理论上不该返回），死循环兜底 */
+loop:
+    j loop

sbst_programs/template.c

@@ -0,0 +1,22 @@
+#include <stdint.h>
+
+#define MISR_START() (*(volatile uint32_t *)0x40000000 = 1)
+#define MISR_STOP()  (*(volatile uint32_t *)0x40000000 = 0)
+#define SIM_FINISH() (*(volatile uint32_t *)0x20000000 = 1)
+volatile uint32_t sink;
+
+int main() {
+    sink = 0;
+
+    MISR_START();
+
+    // Your Code here.
+    sink = 1;
+
+    MISR_STOP();
+    SIM_FINISH();
+    while(1) {
+        __asm__ volatile ("nop");
+    }
+    return 0;
+}