1 <!-- This defines instructions described in PowerISA Version 3.0 B Book 1 -->
3 <!-- This defines instructions that load from RAM to a register -->
5 <!-- Note that these pages also define equivalent store instructions, -->
6 <!-- these are described in fixedstore.mdwn -->
8 <!-- Section 3.3.2 This defines the Fixed-Point Load Instructions pages 47 - 53 -->
9 <!-- Section 3.3.3 Fixed-Point Store Instructions pages 54 - 56 -->
10 <!-- Section 3.3.3.1 64-bit Fixed-Point Store Instructions pages 57 -->
11 <!-- Section 3.3.4 Fixed Point Load and Store Quadword Instructions pages 58 - 59 -->
12 <!-- Section 3.3.5 Fixed-Point Load and Store with Byte Reversal Instructions page 60 -->
13 <!-- Section 3.3.5.1 64-Bit Load and Store with Byte Reversal Instructions page 61 -->
14 <!-- Section 3.3.6 Fixed-Point Load and Store Multiple Instructions page 62 -->
18 <!-- Section 3.3.2 This defines the Fixed-Point Load Instructions pages 47 - 53 -->
20 <!-- The byte, halfword, word, or doubleword in storage addressed by EA is loaded -->
21 <!-- into register RT. -->
23 <!-- Many of the Load instructions have an “update” form, in which register RA is -->
24 <!-- updated with the effective address. For these forms, if RA!=0 and RA!=RT, the -->
25 <!-- effective address is placed into register RA and the storage element (byte, -->
26 <!-- halfword, word, or doubleword) addressed by EA is loaded into RT. -->
29 # Load Byte and Zero Shifted Indexed
38 EA <- b + (RB) << (SH+1)
39 RT <- ([0] * (XLEN-8)) || MEM(EA, 1)
43 Let the effective address (EA) be the sum of the contents of
44 register RB shifted by (SH+1), and (RA|0).
46 The byte in storage addressed by EA is loaded into
47 RT[56:63]. RT[0:55] are set to 0.
50 Special Registers Altered:
54 # Load Byte and Zero Shifted with Update Indexed
62 EA <- (RA) + (RB) << (SH+1)
63 RT <- ([0] * (XLEN-8)) || MEM(EA, 1)
68 Let the effective address (EA) be the sum of the contents of
69 register RB shifted by (SH+1), and (RA).
71 The byte in storage addressed by EA is
72 loaded into RT[56:63] . RT[0:55] are set to 0.
74 EA is placed into register RA.
76 If RA=0, the instruction form is invalid.
78 Special Registers Altered:
82 # Load Halfword and Zero Shifted Indexed
91 EA <- b + (RB) << (SH+1)
92 RT <- ([0] * (XLEN-16)) || MEM(EA, 2)
96 Let the effective address (EA) be the sum of the contents of
97 register RB shifted by (SH+1), and (RA|0).
99 The halfword in storage addressed by EA is loaded into
100 RT[48:63]. RT[0:47] are set to 0.
104 Special Registers Altered:
108 # Load Halfword and Zero Shifted with Update Indexed
116 EA <- (RA) + (RB) << (SH+1)
117 RT <- ([0] * (XLEN-16)) || MEM(EA, 2)
120 Special Registers Altered:
124 # Load Halfword Algebraic Shifted Indexed
133 EA <- b + (RB) << (SH+1)
134 RT <- EXTS(MEM(EA, 2))
136 Special Registers Altered:
140 # Load Halfword Algebraic Shifted with Update Indexed
148 EA <- (RA) + (RB) << (SH+1)
149 RT <- EXTS(MEM(EA, 2))
152 Special Registers Altered:
156 # Load Word and Zero Shifted Indexed
165 EA <- b + (RB) << (SH+1)
166 RT <- [0] * 32 || MEM(EA, 4)
168 Special Registers Altered:
172 # Load Word and Zero Shifted with Update Indexed
180 EA <- (RA) + (RB) << (SH+1)
181 RT <- [0] * 32 || MEM(EA, 4)
184 Special Registers Altered:
188 # Load Word Algebraic Shifted Indexed
197 EA <- b + (RB) << (SH+1)
198 RT <- EXTS(MEM(EA, 4))
200 Special Registers Altered:
204 # Load Word Algebraic Shifted with Update Indexed
212 EA <- (RA) + (RB) << (SH+1)
213 RT <- EXTS(MEM(EA, 4))
216 Special Registers Altered:
220 # Load Doubleword Shifted Indexed
229 EA <- b + (RB) << (SH+1)
232 Special Registers Altered:
236 # Load Doubleword Shifted with Update Indexed
244 EA <- (RA) + (RB) << (SH+1)
248 Special Registers Altered:
252 <!-- byte-reverse shifted -->
254 # Load Halfword Byte-Reverse Shifted Indexed
263 EA <- b + (RB) << (SH+1)
264 load_data <- MEM(EA, 2)
265 RT <- [0]*48 || load_data[8:15] || load_data[0:7]
267 Special Registers Altered:
271 # Load Word Byte-Reverse Shifted Indexed
280 EA <- b + (RB) << (SH+1)
281 load_data <- MEM(EA, 4)
282 RT <- ([0] * 32 || load_data[24:31] || load_data[16:23]
283 || load_data[8:15] || load_data[0:7])
285 Special Registers Altered:
290 <!-- Section 3.3.5.1 64-Bit Load and Store with Byte Reversal Instructions page 61 -->
292 # Load Doubleword Byte-Reverse Shifted Indexed
301 EA <- b + (RB) << (SH+1)
302 load_data <- MEM(EA, 8)
303 RT <- (load_data[56:63] || load_data[48:55]
304 || load_data[40:47] || load_data[32:39]
305 || load_data[24:31] || load_data[16:23]
306 || load_data[8:15] || load_data[0:7])
308 Special Registers Altered: