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7 DETAILS OF INSTRUCTIONS
ld.cw %rd, imm7
Function
Transfer data to the coprocessor
Standard)
Extension 1) co_dout0 ← rd, co_dout1 ← imm20
Extension 2) co_dout0 ← rd, co_dout1 ← imm24
15 14 13 12 11 10
Code
0
1
1
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|
IL
IE
C
Flag
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–
–
–
Mode
Src: Immediate data (unsigned)
Dst: Register direct %rd = %r0 to %r7
CLK
One cycle
Description
(1) Standard
ld.cw
Transfers data set in the rd register and 7-bit immediate imm7 to the coprocessor. The rd register
and the C, V, Z, and N flags in the PSR are not altered.
(2) Extension 1
ext
ld.cw
The ext instruction extends the immediate to a 20-bit quantity. As a result, data set in the rd
register and 20-bit immediate imm20 are transferred to the coprocessor. The rd register and the C,
V, Z, and N flags in the PSR are not altered.
(3) Extension 2
ext
ext
ld.cw
The two ext instructions extend the displacement to a 24-bit quantity. As a result, data set in
the rd register and 24-bit immediate imm24 are transferred to the coprocessor. The rd register
and the C, V, Z, and N flags in the PSR are not altered.
(4) Delayed slot instruction
This instruction may be executed as a delayed slot instruction by writing it directly after
a branch instruction with the "d" bit. In this case, extension of the immediate by the ext
instruction cannot be performed.
7-102
co_dout0 ← rd, co_dout1 ← imm7
9
8
7
6
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1
1
0
r d
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V
Z
N
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–
–
–
%rd,imm7
; co_dout0 data = rd, co_dout1 data = imm7
imm13
; = imm20(19:7)
%rd,imm7
; co_dout0 data = rd
; co_dout1 data = imm20, imm7 = imm20(6:0)
imm4
; imm4(3:0) = imm24(23:20)
imm13
; = imm24(19:7)
%rd,imm7
; co_dout0 data = rd
; co_dout1 data = imm24, imm7 ← imm24(6:0)
Seiko Epson Corporation
5
4
3
2
1
0
imm7
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S1C17 CORE MANUAL
(REV. 1.2)
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