Changes between Version 4 and Version 5 of GcnInstrsVop1

Timestamp:

11/28/15 00:00:20 (8 years ago)

Author:

trac

Comment:

--

GcnInstrsVop1

@@ -1101 +1101 @@
 Description: Convert unsigned 32-bit integer to single FP value, and store it to VDST.<br />
 Operation:<br />
-```
-VDST = (FLOAT)SRC0</p>
+<code>VDST = (FLOAT)SRC0</code></p>
 <h4>V_CVT_F64_I32</h4>
 <p>Opcode VOP2: 4 (0x4)<br />
@@ -1110 +1109 @@
 Operation:<br />
 <code>VDST = (DOUBLE)(INT32)SRC0</code></p>
+<h4>V_CVT_FLR_I32_F32</h4>
+<p>Opcode VOP2: 13 (0xd)<br />
+Opcode VOP3A: 397 (0x18d) for GCN 1.0/1.1; 333 (0x14d) for GCN 1.2<br />
+Syntax: V_CVT_FLR_I32_F32 VDST, SRC0<br />
+Description: Convert 32-bit floating point value from SRC0 to signed 32-bit integer, and
+store result to VDST. Conversion uses rounding to negative infinity (floor).
+If value is higher/lower than maximal/minimal integer then store MAX_INT32/MIN_INT32 to VDST.
+If input value is NaN/-NaN then store MAX_INT32/MIN_INT32 to VDST.<br />
+Operation:<br />
+<code>if (ABS(SRC0)!=NAN)
+    VDST = (INT32)MAX(MIN(FLOOR(ASFLOAT(SRC0)), 2147483647.0), -2147483648.0)
+else
+    VDST = (INT32)SRC0&gt;=0 ? 2147483647 : -2147483648</code></p>
 <h4>V_CVT_I32_F32</h4>
 <p>Opcode VOP2: 8 (0x8)<br />
@@ -1134 +1146 @@
 if (SRC0!=NAN)
     VDST = (INT32)MAX(MIN(RNDTZINT(ASDOUBLE(SRC0)), 2147483647.0), -2147483648.0)</code></p>
+<h4>V_CVT_RPI_I32_F32</h4>
+<p>Opcode VOP2: 12 (0xc)<br />
+Opcode VOP3A: 396 (0x18c) for GCN 1.0/1.1; 332 (0x14c) for GCN 1.2<br />
+Syntax: V_CVT_RPI_I32_F32 VDST, SRC0<br />
+Description: Convert 32-bit floating point value from SRC0 to signed 32-bit integer, and
+store result to VDST. Conversion adds 0.5 to value and rounds negative infinity (floor).
+If value is higher/lower than maximal/minimal integer then store MAX_INT32/MIN_INT32 to VDST.
+If input value is NaN/-NaN then store MAX_INT32/MIN_INT32 to VDST.<br />
+Description:<br />
+<code>if (ABS(SRC0)!=NAN)
+    VDST = (INT32)MAX(MIN(FLOOR(ASFLOAT(SRC0) + 0.5), 2147483647.0), -2147483648.0)
+else
+    VDST = (INT32)SRC0&gt;=0 ? 2147483647 : -2147483648</code></p>
 <h4>V_CVT_U32_F32</h4>
 <p>Opcode VOP2: 7 (0x7)<br />
@@ -1168 +1193 @@
 Opcode VOP3A: 386 (0x182) for GCN 1.0/1.1; 322 (0x142) for GCN 1.2<br />
 Syntax: V_READFIRSTLANE_B32 SDST, VSRC0<br />
-Description: Copy one VSRC0 lane value to one SDST. Lane (thread id) is first active lane id or
-first lane id all lanes are inactive. SSRC1 can be SGPR or M0. Ignores EXEC mask.<br />
-Operation:<br />
+Description: Copy one VSRC0 lane value to one SDST. Lane (thread id) is first active lane id
+or first lane id all lanes are inactive. SSRC1 can be SGPR or M0. Ignores EXEC mask.<br />
 Operation:<br />
 <code>UINT8 firstlane = 0