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28 lines
669 B
28 lines
669 B
2 months ago
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#include <stdio.h>
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#include <string.h>
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#include <riscv_vector.h>
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int main()
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{
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const size_t N = 1001;
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volatile int a[N];
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int* b = (int*)a;
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for (size_t i = 0; i < N; i++)
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a[i] = i;
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vint32m8_t vsum = __riscv_vmv_v_x_i32m8(0, -1);
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for (size_t i = 0; i < N; ) {
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size_t vl = __riscv_vsetvl_e32m8(N - i);
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vint32m8_t v = __riscv_vle32_v_i32m8(b + i, vl);
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vsum = __riscv_vadd_vv_i32m8(vsum, v, vl);
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i += vl;
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}
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vint32m1_t vzero = __riscv_vmv_v_x_i32m1(0, 1);
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int sum = __riscv_vmv_x_s_i32m1_i32(__riscv_vredsum_vs_i32m8_i32m1(vsum, vzero, -1));
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printf("The sum of the first %zu positive integers is %d.\n", N - 1, sum);
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return 0;
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}
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