Changes between Version 6 and Version 7 of GcnInstrsVop3

Timestamp:

12/06/15 22:00:18 (8 years ago)

Author:

trac

Comment:

--

GcnInstrsVop3

@@ -910 +910 @@
     OUT = -SF1
 VDST = OUT</code></p>
+<h4>V_CVT_PK_U8_F32</h4>
+<p>Opcode: 350 (0x15e) for GCN 1.0/1.1; 477 (0x1dd) for GCN 1.2<br />
+Syntax: V_CVT_PK_U8_F32 VDST, SRC0, SRC1, SRC2<br />
+Description: Convert floating point value from SRC0 to unsigned byte value with
+rounding mode from MODE register, and store this byte to (SRC1&amp;3)'th byte with
+other bytes of SRC2 of VDST.<br />
+Operation:<br />
+<code>UINT8 shift = ((SRC1&amp;3) * 8)
+UINT32 mask = 0xff &lt;&lt; shift
+FLOAT f = RNDINT(ASFLOAT(SRC0))
+UINT8 VAL8 = 0
+if (ISNAN(f))
+    VAL8 = (UINT8)MAX(MIN(f, 255.0), 0.0)
+VDST = (SRC2&amp;~mask) | (((UINT32)VAL8) &lt;&lt; shift)</code></p>
 <h4>V_FMA_F32</h4>
 <p>Opcode: 331 (0x14b) for GCN 1.0/1.1; 459 (0x1cb) for GCN 1.2<br />
@@ -1122 +1136 @@
 <p>Opcode: 348 (0x15c) for GCN 1.0/1.1; 475 (0x1db) for GCN 1.2<br />
 Syntax: V_SAD_U16 VDST, SRC0, SRC1, SRC2<br />
-Description: Calculate sum of absolute differences for two 16-bit words in SRC0 and SRC1, add
-SRC2 to result, and store result to VDST.<br />
+Description: Calculate sum of absolute differences for two 16-bit words in SRC0 and SRC1,
+add SRC2 to result, and store result to VDST.<br />
 Operation:<br />
 <code>VDST = SRC2