Changes between Version 25 and Version 26 of GcnInstrsVop3

Timestamp:

06/17/17 15:00:34 (6 years ago)

Author:

trac

Comment:

--

GcnInstrsVop3

@@ -1026 +1026 @@
 UINT16 D1 = ASINT16(CVT_HALF_RTZ(ASFLOAT(SRC1)))
 VDST = D0 | (((UINT32)D1) &lt;&lt; 16)</code></p>
+<h4>V_DIV_FIXUP_F16</h4>
+<p>Opcode: 495 (0x1ef) for GCN 1.2<br />
+Syntax: V_DIV_FIXUP_F16 VDST, SRC0, SRC1, SRC2<br />
+Description: Handle all exceptions requires for half floating point division.
+SRC0 is quotient, SRC1 is denominator, SRC2 is nominator. Correct result stored to VDST.<br />
+Operation:<br />
+<code>HALF SF0 = ASHALF(SRC0)
+HALF SF1 = ASHALF(SRC1)
+HALF SF2 = ASHALF(SRC2)
+if (ISNAN(SF1) &amp;&amp; !ISNAN(SF2))
+    VDST = QUIETNAN(SF1)
+else if (ISNAN(SF2))
+    VDST = QUIETNAN(SF2)
+else if (SF1 == 0.0 &amp;&amp; SF2 == 0.0)
+    VDST = NAN_H
+else if (ABS(SF1)==INF &amp;&amp; ABS(SF2)==INF)
+    VDST = -NAN_H
+else if (SF1 == 0.0)
+    VDST = INF_H*SIGN(SF1)*SIGN(SF2)
+else if (ABS(SF1) == INF)
+    VDST = SIGN(SF1)*SIGN(SF2) &gt;=0 ? 0.0 : -0.0
+else if (ISNAN(SF0))
+    VDST = SIGN(SF1)*SIGN(SF2)*INF_H
+else
+    VDST = SF0</code></p>
 <h4>V_DIV_FIXUP_F32</h4>
 <p>Opcode: 351 (0x15f) for GCN 1.0/1.1; 478 (0x1de) for GCN 1.2<br />
@@ -1177 +1202 @@
     SDST = (SDST &amp; ~MASK)
 }</code></p>
+<h4>V_FMA_F16</h4>
+<p>Opcode: 494 (0x1ee) for GCN 1.2<br />
+Syntax: V_FMA_F16 VDST, SRC0, SRC1, SRC2<br />
+Description: Fused multiply addition on half floating point values from
+SRC0, SRC1 and SRC2. Result stored in VDST.<br />
+Operation:<br />
+<code>// SRC0*SRC1+SRC2
+VDST = FMA(ASHALF(SRC0), ASHALF(SRC1), ASHALF(SRC2))</code></p>
 <h4>V_FMA_F32</h4>
 <p>Opcode: 331 (0x14b) for GCN 1.0/1.1; 459 (0x1cb) for GCN 1.2<br />
@@ -1253 +1286 @@
 <code>if (ASFLOAT(SRC0)!=0.0 &amp;&amp; ASFLOAT(SRC1)!=0.0)
     VDST = ASFLOAT(SRC0) * ASFLOAT(SRC1) + ASFLOAT(VDST)</code></p>
+<h4>V_MAD_F16</h4>
+<p>Opcode: 490 (0x1ea) for GCN 1.2<br />
+Syntax: V_MAD_F16 VDST, SRC0, SRC1, SRC2<br />
+Description: Multiply half FP value from SRC0 by half FP value from
+SRC1 and add SRC2, and store result to VDST.
+It applies OMOD modifier to result and it flush denormals.<br />
+Operation:<br />
+<code>VDST = ASHALF(SRC0) * ASHALF(SRC1) + ASHALF(SRC2)</code></p>
 <h4>V_MAD_F32</h4>
 <p>Opcode: 321 (0x141) for GCN 1.0/1.1; 449 (0x1c1) for GCN 1.2<br />