Mercurial > hg > truffle

changeset 15277:87ce885d0b83

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add rotate instructions and make the shift encodings more uniform
author Tom Rodriguez <tom.rodriguez@oracle.com>
date Tue, 22 Apr 2014 17:25:27 -0700
parents c2f715edadec
children 3ef4196cf8e5
files graal/com.oracle.graal.asm.amd64/src/com/oracle/graal/asm/amd64/AMD64Assembler.java
diffstat 1 files changed, 92 insertions(+), 6 deletions(-) [+]
line wrap: on
line diff
--- a/graal/com.oracle.graal.asm.amd64/src/com/oracle/graal/asm/amd64/AMD64Assembler.java	Tue Apr 22 17:25:24 2014 -0700
+++ b/graal/com.oracle.graal.asm.amd64/src/com/oracle/graal/asm/amd64/AMD64Assembler.java	Tue Apr 22 17:25:27 2014 -0700
@@ -1647,9 +1647,14 @@
     public final void shrl(Register dst, int imm8) {
         assert isShiftCount(imm8) : "illegal shift count";
         int encode = prefixAndEncode(dst.encoding);
-        emitByte(0xC1);
-        emitByte(0xE8 | encode);
-        emitByte(imm8);
+        if (imm8 == 1) {
+            emitByte(0xD1);
+            emitByte(0xE8 | encode);
+        } else {
+            emitByte(0xC1);
+            emitByte(0xE8 | encode);
+            emitByte(imm8);
+        }
     }
 
     public final void shrl(Register dst) {
@@ -1658,6 +1663,82 @@
         emitByte(0xE8 | encode);
     }
 
+    public final void roll(Register dst, int imm8) {
+        assert isShiftCount(imm8) : "illegal shift count";
+        int encode = prefixAndEncode(dst.encoding);
+        if (imm8 == 1) {
+            emitByte(0xD1);
+            emitByte(0xC0 | encode);
+        } else {
+            emitByte(0xC1);
+            emitByte(0xC0 | encode);
+            emitByte(imm8);
+        }
+    }
+
+    public final void roll(Register dst) {
+        int encode = prefixAndEncode(dst.encoding);
+        emitByte(0xD3);
+        emitByte(0xC0 | encode);
+    }
+
+    public final void rorl(Register dst, int imm8) {
+        assert isShiftCount(imm8) : "illegal shift count";
+        int encode = prefixAndEncode(dst.encoding);
+        if (imm8 == 1) {
+            emitByte(0xD1);
+            emitByte(0xC8 | encode);
+        } else {
+            emitByte(0xC1);
+            emitByte(0xC8 | encode);
+            emitByte(imm8);
+        }
+    }
+
+    public final void rorl(Register dst) {
+        int encode = prefixAndEncode(dst.encoding);
+        emitByte(0xD3);
+        emitByte(0xC8 | encode);
+    }
+
+    public final void rolq(Register dst, int imm8) {
+        assert isShiftCount(imm8) : "illegal shift count";
+        int encode = prefixqAndEncode(dst.encoding);
+        if (imm8 == 1) {
+            emitByte(0xD1);
+            emitByte(0xC0 | encode);
+        } else {
+            emitByte(0xC1);
+            emitByte(0xC0 | encode);
+            emitByte(imm8);
+        }
+    }
+
+    public final void rolq(Register dst) {
+        int encode = prefixqAndEncode(dst.encoding);
+        emitByte(0xD3);
+        emitByte(0xC0 | encode);
+    }
+
+    public final void rorq(Register dst, int imm8) {
+        assert isShiftCount(imm8) : "illegal shift count";
+        int encode = prefixqAndEncode(dst.encoding);
+        if (imm8 == 1) {
+            emitByte(0xD1);
+            emitByte(0xC8 | encode);
+        } else {
+            emitByte(0xC1);
+            emitByte(0xC8 | encode);
+            emitByte(imm8);
+        }
+    }
+
+    public final void rorq(Register dst) {
+        int encode = prefixqAndEncode(dst.encoding);
+        emitByte(0xD3);
+        emitByte(0xC8 | encode);
+    }
+
     public final void sqrtsd(Register dst, AMD64Address src) {
         assert dst.getRegisterCategory() == AMD64.XMM;
         emitByte(0xF2);
@@ -2442,9 +2523,14 @@
     public final void shrq(Register dst, int imm8) {
         assert isShiftCount(imm8 >> 1) : "illegal shift count";
         int encode = prefixqAndEncode(dst.encoding);
-        emitByte(0xC1);
-        emitByte(0xE8 | encode);
-        emitByte(imm8);
+        if (imm8 == 1) {
+            emitByte(0xD1);
+            emitByte(0xE8 | encode);
+        } else {
+            emitByte(0xC1);
+            emitByte(0xE8 | encode);
+            emitByte(imm8);
+        }
     }
 
     public final void shrq(Register dst) {