# HVX Revision history

HVX revision history

| **Revision** | **Date** | **Description** |
| --- | --- | --- |
| AA | December 2024 | <ul class="simple"><br><li><p>Added <a href="https://docs.qualcomm.com/doc/80-N3040-23/topic/src_hvx-instruction-set.html#v81-hvx-shift-resource-convert-to-hvx-floating-point"><span class="std std-ref">HVX floating-point convert instructions</span></a></p><br><ul><br><li><p>Vd.qf32=Vu.sf</p></li><br><li><p>Vd.qf32=Vu.qf32</p></li><br><li><p>Vd.qf16=Vu.hf</p></li><br><li><p>Vd.qf16=Vu.qf16</p></li><br></ul><br></li><br><li><p>Added <a href="https://docs.qualcomm.com/doc/80-N3040-23/topic/src_hvx-instruction-set.html#v81-hvx-shift-resource-convert-hvx-floating-point-to-ieee-floating-point"><span class="std std-ref">IEEE convert instructions</span></a></p><br><ul><br><li><p>Vd.f8=Vu.qf16</p></li><br></ul><br></li><br><li><p>Added <a href="https://docs.qualcomm.com/doc/80-N3040-23/topic/src_hvx-instruction-set.html#v81-hvx-shift-resource-convert-to-double-hvx-floating-point"><span class="std std-ref">HVX floating-point double convert instruction</span></a></p><br><ul><br><li><p>Vdd.qf16=Vu.f8</p></li><br></ul><br></li><br><li><p>Added <a href="https://docs.qualcomm.com/doc/80-N3040-23/topic/src_hvx-instruction-set.html#v81-hvx-shift-resource-extract-exponent"><span class="std std-ref">HVX floating-point extract exponent instructions</span></a></p><br><ul><br><li><p>Vd.w=vilog2(Vu.hf)</p></li><br><li><p>Vd.w=vilog2(Vu.qf16)</p></li><br><li><p>Vd.w=vilog2(Vu.qf32)</p></li><br><li><p>Vd.w=vilog2(Vu.sf)</p></li><br></ul><br></li><br><li><p>Added <a href="https://docs.qualcomm.com/doc/80-N3040-23/topic/src_hvx-instruction-set.html#v81-hvx-shift-resource-hvx-floating-point-absolute-value"><span class="std std-ref">HVX floating-point abs instructions</span></a></p><br><ul><br><li><p>Vd.qf16=vabs(Vu.hf)</p></li><br><li><p>Vd.qf16=vabs(Vu.qf16)</p></li><br><li><p>Vd.qf32=vabs(Vu.qf32)</p></li><br><li><p>Vd.qf32=vabs(Vu.sf)</p></li><br></ul><br></li><br><li><p>Added <a href="https://docs.qualcomm.com/doc/80-N3040-23/topic/src_hvx-instruction-set.html#v81-hvx-shift-resource-hvx-floating-point-negate"><span class="std std-ref">HVX floating-point neg instructions</span></a></p><br><ul><br><li><p>Vd.qf16=vneg(Vu.hf)</p></li><br><li><p>Vd.qf16=vneg(Vu.qf16)</p></li><br><li><p>Vd.qf32=vneg(Vu.qf32)</p></li><br><li><p>Vd.qf32=vneg(Vu.sf)</p></li><br></ul><br></li><br></ul> |
| AA (cont.) | <ul class="simple"><br><li></li><br></ul> | <ul class="simple"><br><li><p>Added HVX floating-point mixed subtract with flipped IEEE and HVX floating-point order</p><br><ul><br><li><p><a href="https://docs.qualcomm.com/doc/80-N3040-23/topic/src_hvx-instruction-set.html#v81-hvx-shift-resource-hvx-floating-point-add-and-subtract-half-precision"><span class="std std-ref">Vd.qf16=vsub(Vu.hf,Vv.qf16)</span></a></p></li><br><li><p><a href="https://docs.qualcomm.com/doc/80-N3040-23/topic/src_hvx-instruction-set.html#v81-hvx-shift-resource-hvx-floating-point-add-and-subtract-single-precision"><span class="std std-ref">Vd.qf32=vsub(Vu.sf,Vv.qf32)</span></a></p></li><br></ul><br></li><br><li><p>Updated <a href="https://docs.qualcomm.com/doc/80-N3040-23/topic/src_hvx-floating-point.html#v81-hvx-normalization"><span class="std std-ref">HVX floating-point normalization sequences</span></a></p></li><br><li><p>Added <a href="https://docs.qualcomm.com/doc/80-N3040-23/topic/src_hvx-instruction-set.html#v81-hvx-alu-resource-compare-vectors"><span class="std std-ref">IEEE cmp.eq instructions</span></a></p><br><ul><br><li><p>Qd4=vcmp.eq(Vu.hf,Vv.hf)</p></li><br><li><p>Qd4=vcmp.eq(Vu.sf,Vv.sf)</p></li><br><li><p>Qx4&amp;=vcmp.eq(Vu.hf,Vv.hf)</p></li><br><li><p>Qx4&amp;=vcmp.eq(Vu.sf,Vv.sf)</p></li><br><li><p>Qx4^=vcmp.eq(Vu.hf,Vv.hf)</p></li><br><li><p>Qx4^=vcmp.eq(Vu.sf,Vv.sf)</p></li><br><li><p>Qx4|=vcmp.eq(Vu.hf,Vv.hf)</p></li><br><li><p>Qx4|=vcmp.eq(Vu.sf,Vv.sf)</p></li><br></ul><br></li><br><li><p>IEEE cmp instructions now detect NaNs</p></li><br><li><p>IEEE min/max will propagate NaNs if at least one input is a NaN</p></li><br><li><p>New <a href="https://docs.qualcomm.com/doc/80-N3040-23/topic/src_hvx-instruction-set.html#v81-hvx-permute-resource-byte-alignment"><span class="std std-ref">valign4 byte alignment instruction</span></a></p><br><ul><br><li><p>Vd=valign4(Vu,Vv,Rt)</p></li><br></ul><br></li><br></ul> |

Last Published: Oct 06, 2026

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