Boxis R700 User Manual Page 201

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ATI R700 Technology
ALU Instructions 9-103
Copyright © 2009 Advanced Micro Devices, Inc. All rights reserved.
Scalar Multiply Emulating LIT, Multiply By 4
Instructions
MUL_LIT_M4
Description A MUL_LIT operation, followed by multiply by 4.
The pseudocode for the MUL_LIT instruction is:
If ((src1 == -MAX_FLOAT) ||
(src1 == -INFINITY) ||
(src1 is NaN) ||
(src2 <= 0.0f) ||
(src2 is NaN)) {
dst = -MAX_FLOAT * 4;
}
Else {
dst = (src0 * src1) * 4;
}
Microcode
Format ALU_DWORD0 (page 10-16) and ALU_DWORD1_OP3 (page 10-23).
Instruction Field ALU_INST == OP3_INST_MUL_LIT_M4, opcode 14 (0xE).
C DE
D
R
DST_GPR BS
ALU_INST
(11000)
S
2
N
S2E
S
2
R
SRC2_SEL +4
L PS IM
S
1
N
S1E
S
1
R
SRC1_SEL
S
0
N
S0E
S
0
R
SRC0_SEL +0
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