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計算機結構與作業系統(B)
選擇國立臺灣大學 2022 · 考試 · 第 6 題
考科計算機組織與結構
(5 pts) Below is the RISC-V assembly program generated for the body of function f: int f(int a, int b, int c). The program follows RISC-V's convention and uses registers x10-x18 to pass parameters and return values in function calls.
addi x2, x2, -16
sd x1, 0(x2)
slli x5, x12, 5
sd x5, 8(x2)
jal x1, m
ld x11, 8(x2)
lui x12, 0x11232
addi x12, 0x334
ld x1, 0(x2)
addi x2, x2, 16
jal x0, g
Which of the following is the respective C code? Note that the addi instruction in RISC-V is sign-extended for immediate values.
- (A)return g(m(a, b*5), 0x11232334)
- (B)return g(m(a, b), c*32, 0x33411232)
- (C)return g(m(a, b), 0x11232334, c*32)
- (D)return g(m(a, c), b*32, 0x11232334)
- (E)return g(m(a, b), c*32, 0x11232334)