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26 lines
543 B
26 lines
543 B
// vsmul.vx vd, vs2, rs1
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require(p->extension_enabled('V') || P.VU.vsew < e64);
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VI_VX_LOOP
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({
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VRM xrm = P.VU.get_vround_mode();
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int64_t int_max = INT64_MAX >> (64 - P.VU.vsew);
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int64_t int_min = INT64_MIN >> (64 - P.VU.vsew);
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bool overflow = rs1 == vs2 && rs1 == int_min;
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int128_t result = (int128_t)rs1 * (int128_t)vs2;
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// rounding
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INT_ROUNDING(result, xrm, sew - 1);
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// remove guard bits
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result = result >> (sew - 1);
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// max saturation
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if (overflow) {
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result = int_max;
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P_SET_OV(1);
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}
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vd = result;
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})
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