From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sat, 28 Mar 2020 18:00:05 +0000 (+0000)
Subject: add stringldst
X-Git-Tag: convert-csv-opcode-to-binary~3038
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9c7c2916e250ff59bae23608f6cbcb6ac60bd843;p=libreriscv.git

add stringldst
---

diff --git a/openpower/isa/stringldst.mdwn b/openpower/isa/stringldst.mdwn
new file mode 100644
index 000000000..734476670
--- /dev/null
+++ b/openpower/isa/stringldst.mdwn
@@ -0,0 +1,78 @@
+# Load String Word Immediate 
+
+lswi RT,RA,NB 
+
+    if RA = 0 then EA <- 0
+    else           EA <- (RA)
+    if NB = 0 then n <-  32
+    else           n <-  NB
+    r <- RT - 1
+    i <- 32
+    do while n > 0
+        if i = 32 then
+            r <- r + 1 (mod 32)
+            GPR(r) <- 0
+        GPR(r)[i:i+7] <- MEM(EA, 1)
+        i <- i + 8
+        if i = 64 then i <- 32
+        EA <- EA + 1
+        n <- n - 1
+
+# Load String Word Indexed 
+
+lswx RT,RA,RB 
+
+    if RA = 0 then b <- 0
+    else           b <- (RA)
+    EA <- b + (RB)
+    n <- XER 57:63
+    r <- RT - 1
+    i <- 32
+    RT <- undefined
+    do while n > 0
+
+        if i = 32 then
+            r <-  r + 1 (mod 32)
+            GPR(r) <- 0
+        GPR(r)[i:i+7] <- MEM(EA, 1)
+        i <-  i + 8
+        if i = 64 then i <- 32
+        EA <-  EA + 1
+        n <- n - 1
+
+# Store String Word Immediate
+
+stswi RS,RA,NB 
+
+    if RA = 0 then EA <- 0
+    else           EA <- (RA)
+    if NB = 0 then n <-  32
+    else           n <-  NB
+    r <- RS - 1
+    i <- 32
+    do while n > 0
+      if i = 32 then r <-  (r + 1) % 32
+      MEM(EA, 1) <-  GPR(r)[i:i+7]
+       i <-  i + 8
+      if i = 64 then i <-  32
+      EA <-  EA + 1
+      n <- n - 1
+
+# Store String Word Indexed 
+
+stswx RS,RA,RB
+
+    if RA = 0 then b <- 0
+    else           b <- (RA)
+    EA <- b + (RB)
+    n <- XER57:63
+    r <- RS - 1
+    i <- 32
+    do while n > 0
+      if i = 32 then r <- (r + 1) % 32
+      MEM(EA, 1) <- GPR(r)[i:i+7]
+        i <-  i + 8
+      if i = 64 then i <- 32
+      EA <-  EA + 1
+      n <- n - 1
+