Spike, a RISC-V ISA Simulator
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uint32_t nxpr = (XS1 & 0x3f) + (insn.i_imm() & 0x3f);
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uint32_t nfpr = ((XS1 >> 6) & 0x3f) + ((insn.i_imm() >> 6) & 0x3f);
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if (nxpr > 32)
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h->take_exception(HWACHA_CAUSE_ILLEGAL_CFG, 0);
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if (nfpr > 32)
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h->take_exception(HWACHA_CAUSE_ILLEGAL_CFG, 1);
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WRITE_NXPR(nxpr);
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WRITE_NFPR(nfpr);
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uint32_t maxvl;
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if (nxpr + nfpr < 2)
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maxvl = 8 * 256;
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else
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maxvl = 8 * (256 / (nxpr-1 + nfpr));
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WRITE_MAXVL(maxvl);
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WRITE_VL(0);
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