From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sat, 28 Mar 2020 20:41:59 +0000 (+0000)
Subject: add fixed-shift
X-Git-Tag: convert-csv-opcode-to-binary~3032
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d63c44909bbd46bbb69a02061bf35e0c90af11f0;p=libreriscv.git

add fixed-shift
---

diff --git a/openpower/isa/fixedshift.mdwn b/openpower/isa/fixedshift.mdwn
new file mode 100644
index 000000000..fd6adcd2c
--- /dev/null
+++ b/openpower/isa/fixedshift.mdwn
@@ -0,0 +1,236 @@
+# Rotate Left Word Immediate then AND with Mask M-form
+
+rlwinm RA,RS,SH,MB,ME (Rc=0)
+
+rlwinm.  RA,RS,SH,MB,ME (Rc=1)
+
+    n <- SH
+    r <- ROTL32((RS)[32:63], n)
+    m <- MASK(MB+32, ME+32)
+    RA <- r & m
+
+# Rotate Left Word then AND with Mask  
+
+rlwnm RA,RS,RB,MB,ME (Rc=0)
+
+rlwnm.  RA,RS,RB,MB,ME (Rc=1)
+
+    n <- (RB)[59:63]
+    r <- ROTL32((RS)[32:63], n)
+    m <- MASK(MB+32, ME+32)
+    RA <- r & m
+
+# Rotate Left Word Immediate then Mask Insert  
+
+rlwimi RA,RS,SH,MB,ME (Rc=0)
+
+rlwimi.  RA,RS,SH,MB,ME (Rc=1)
+
+    n <- SH
+    r <- ROTL32((RS)[32:63], n)
+    m <- MASK(MB+32, ME+32)
+    RA <- r&m | (RA) & ¬m
+
+# Rotate Left Doubleword Immediate then Clear Left  
+
+rldicl RA,RS,SH,MB (Rc=0)
+
+rldicl.  RA,RS,SH,MB (Rc=1)
+
+    n <- sh[5] || sh[0:4]
+    r <- ROTL64((RS), n)
+    b <- mb[5] || mb[0:4]
+    m <- MASK(b, 63)
+    RA <- r & m
+
+# Rotate Left Doubleword Immediate then Clear Right  
+
+rldicr RA,RS,SH,ME (Rc=0)
+
+rldicr.  RA,RS,SH,ME (Rc=1)
+
+    n <- sh[5] || sh[0:4]
+    r <- ROTL64((RS), n)
+    e <- me[5] || me[0:4]
+    m <- MASK(0, e)
+    RA <- r & m
+
+# Rotate Left Doubleword Immediate then Clear  
+
+rldic RA,RS,SH,MB (Rc=0)
+
+rldic.  RA,RS,SH,MB (Rc=1)
+
+    n <- sh[5] || sh[0:4]
+    r <- ROTL64((RS), n)
+    b <- mb[5] || mb[0:4]
+    m <- MASK(b,  ¬n)
+    RA <- r & m
+
+# Rotate Left Doubleword then Clear Left 
+
+rldcl RA,RS,RB,MB (Rc=0)
+
+rldcl.  RA,RS,RB,MB (Rc=1)
+
+    n <- (RB)[58:63]
+    r <- ROTL64((RS), n)
+    b <- mb[5] || mb[0:4]
+    m <- MASK(b, 63)
+    RA <- r & m
+
+# Rotate Left Doubleword then Clear Right 
+
+rldcr RA,RS,RB,ME (Rc=0)
+
+rldcr.  RA,RS,RB,ME (Rc=1)
+
+    n <- (RB)[58:63]
+    r <- ROTL64((RS), n)
+    e <- me[5] || me[0:4]
+    m <- MASK(0, e)
+    RA <- r & m
+
+# Rotate Left Doubleword Immediate then Mask Insert 
+
+rldimi RA,RS,SH,MB (Rc=0)
+
+rldimi.  RA,RS,SH,MB (Rc=1)
+
+    n <- sh[5] || sh[0:4]
+    r <- ROTL64((RS), n)
+    b <- mb[5] || mb[0:4]
+    m <- MASK(b,  ¬n)
+    RA <- r&m | (RA)& ¬m
+
+
+# Shift Left Word 
+
+slw RA,RS,RB (Rc=0)
+
+slw.  RA,RS,RB (Rc=1)
+
+    n <- (RB)[59:63]
+    r <- ROTL32((RS)[32:63], n)
+    if (RB)58 = 0 then
+         m <- MASK(32, 63-n)
+    else m <- [0]*64
+    RA <- r & m
+
+
+# Shift Right Word  
+
+srw RA,RS,RB (Rc=0)
+
+srw.  RA,RS,RB (Rc=1)
+
+    n <- (RB)[59:63]
+    r <- ROTL32((RS)[32:63], 64-n)
+    if (RB)58 = 0 then
+        m <-  MASK(n+32, 63)
+    else m <- [0]*64
+    RA <- r & m
+
+# Shift Right Algebraic Word Immediate 
+ 
+srawi RA,RS,SH (Rc=0)
+
+srawi.  RA,RS,SH (Rc=1) 
+
+    n <- SH
+    r <- ROTL32((RS)[32:63], 64-n)
+    m <- MASK(n+32, 63)
+    s <- (RS)[32]
+    RA <- r&m | ([s]*64)& ¬m
+    carry <- s & ((r&¬m)[32:63] != 0)
+    CA    <- carry
+    CA32  <- carry
+
+# Shift Right Algebraic Word  
+
+sraw RA,RS,RB (Rc=0)
+
+sraw.  RA,RS,RB (Rc=1) 
+
+    n <- (RB)[59:63]
+    r <- ROTL32((RS)[32:63], 64-n)
+    if (RB)[58] = 0 then
+        m <-  MASK(n+32, 63)
+    else m <- [0]*64
+    s <- (RS)[32]
+    RA <- r&m | ([s]*64)& m¬
+    carry <-  s & ((r&¬m)[32:63] !=0)
+    CA    <-  carry
+    CA32  <-  carry
+
+# Shift Left Doubleword 
+
+sld RA,RS,RB (Rc=0)
+
+sld.  RA,RS,RB (Rc=1)
+
+    n <- (RB)[58:63]
+    r <- ROTL64((RS), n)
+    if (RB)[57] = 0 then
+         m <- MASK(0, 63-n)
+    else m <- [0]*64
+    RA <- r & m
+
+
+# Shift Right Doubleword 
+
+srd RA,RS,RB (Rc=0)
+
+srd.  RA,RS,RB (Rc=1)
+
+    n <- (RB)[58:63]
+    r <- ROTL64((RS), 64-n)
+    if (RB)[57] = 0 then
+        m <-  MASK(n, 63)
+    else m <- [0]*64
+    RA <- r & m
+
+# Shift Right Algebraic Doubleword Immediate
+
+sradi RA,RS,SH (Rc=0)
+
+sradi.  RA,RS,SH (Rc=1)
+
+    n <- sh[5] || sh[0:4]
+    r <- ROTL64((RS), 64-n)
+    m <- MASK(n, 63)
+    s <- (RS)[0]
+    RA <- r&m | ([s]*64)& ¬m
+    carry <- s & ((r& ¬m) != 0)
+    CA    <- carry
+    CA32  <- carry
+
+
+# Shift Right Algebraic Doubleword  
+
+srad RA,RS,RB (Rc=0)
+
+srad.  RA,RS,RB (Rc=1)
+
+    n <- (RB)[58:63]
+    r <- ROTL64((RS), 64-n)
+    if (RB)57 = 0 then
+        m <-  MASK(n, 63)
+    else m <- [0]*64
+    s <- (RS)0
+    RA <- r&m | ([s]*64)& ¬m
+    carry <-  s & ((r&¬m)!= 0)
+    CA    <-  carry
+    CA32  <-  carry
+
+# Extend-Sign Word and Shift Left Immediate 
+
+extswsli RA,RS,SH (Rc=0)
+
+extswsli.  RA,RS,SH (Rc=1) 
+
+    n  <- sh[5] || sh[0:4]
+    r  <- ROTL64(EXTS64(RS[32:63]), n)
+    m  <- MASK(0, 63-n)
+    RA <- r & m
+