add (and document) the ability for alias results to have

[oota-llvm.git] / lib / Target / X86 / X86InstrInfo.td

diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td
index 88079615cb5bebc4c4019d3a297f453da18c5670..fdb29837fd79502652de35b695e0055ce3d6ff3a 100644 (file)
--- a/lib/Target/X86/X86InstrInfo.td
+++ b/lib/Target/X86/X86InstrInfo.td
@@ -1367,12 +1367,34 @@ defm : IntegerCondCodeMnemonicAlias<"cmov", "q">;
 // Assembler Instruction Aliases
 //===----------------------------------------------------------------------===//
 
+// aad/aam default to base 10 if no operand is specified.
+def : InstAlias<"aad", (AAD8i8 10)>;
+def : InstAlias<"aam", (AAM8i8 10)>;
+
 // clr aliases.
 def : InstAlias<"clrb $reg", (XOR8rr  GR8 :$reg, GR8 :$reg)>;
 def : InstAlias<"clrw $reg", (XOR16rr GR16:$reg, GR16:$reg)>;
 def : InstAlias<"clrl $reg", (XOR32rr GR32:$reg, GR32:$reg)>;
 def : InstAlias<"clrq $reg", (XOR64rr GR64:$reg, GR64:$reg)>;
 
+// Default arguments for various fp stack instructions.
+def : InstAlias<"fucom",        (UCOM_Fr   ST1)>;
+def : InstAlias<"fucomp",       (UCOM_FPr  ST1)>;
+def : InstAlias<"fcomi",        (COM_FIr   ST1)>;
+def : InstAlias<"fcomi   $reg", (COM_FIr   RST:$reg)>;
+def : InstAlias<"fcomip",       (COM_FIPr  ST1)>;
+def : InstAlias<"fcomip  $reg", (COM_FIPr  RST:$reg)>;
+def : InstAlias<"fucomi",       (UCOM_FIr  ST1)>;
+def : InstAlias<"fucomi  $reg", (UCOM_FIr  RST:$reg)>;
+def : InstAlias<"fucomip",      (UCOM_FIPr ST1)>;
+def : InstAlias<"fucomip $reg", (UCOM_FIPr RST:$reg)>;
+
+
+// We accepts "fnstsw %eax" even though it only writes %ax.
+def : InstAlias<"fnstsw %eax", (FNSTSW8r)>;
+def : InstAlias<"fnstsw %al" , (FNSTSW8r)>;
+def : InstAlias<"fnstsw"     , (FNSTSW8r)>;
+
 // lcall and ljmp aliases.  This seems to be an odd mapping in 64-bit mode, but
 // this is compatible with what GAS does.
 def : InstAlias<"lcall $seg, $off", (FARCALL32i i32imm:$off, i16imm:$seg)>;
@@ -1388,6 +1410,14 @@ def : InstAlias<"imull $imm, $r", (IMUL32rri8 GR32:$r, GR32:$r, i32i8imm:$imm)>;
 def : InstAlias<"imulq $imm, $r",(IMUL64rri32 GR64:$r, GR64:$r,i64i32imm:$imm)>;
 def : InstAlias<"imulq $imm, $r", (IMUL64rri8 GR64:$r, GR64:$r, i64i8imm:$imm)>;
 
+// inb %dx -> inb %al, %dx
+def : InstAlias<"inb %dx", (IN8rr)>;
+def : InstAlias<"inw %dx", (IN16rr)>;
+def : InstAlias<"inl %dx", (IN32rr)>;
+def : InstAlias<"inb $port", (IN8ri i8imm:$port)>;
+def : InstAlias<"inw $port", (IN16ri i8imm:$port)>;
+def : InstAlias<"inl $port", (IN32ri i8imm:$port)>;
+
 
 // jmp and call aliases for lcall and ljmp.  jmp $42,$5 -> ljmp
 def : InstAlias<"call $seg, $off",  (FARCALL32i i32imm:$off, i16imm:$seg)>;
@@ -1423,6 +1453,14 @@ def : InstAlias<"movzx $src, $dst", (MOVZX64rr8_Q GR64:$dst, GR8:$src)>;
 def : InstAlias<"movzx $src, $dst", (MOVZX64rr16_Q GR64:$dst, GR16:$src)>;
 // Note: No GR32->GR64 movzx form.
 
+// outb %dx -> outb %al, %dx
+def : InstAlias<"outb %dx", (OUT8rr)>;
+def : InstAlias<"outw %dx", (OUT16rr)>;
+def : InstAlias<"outl %dx", (OUT32rr)>;
+def : InstAlias<"outb $port", (OUT8ir i8imm:$port)>;
+def : InstAlias<"outw $port", (OUT16ir i8imm:$port)>;
+def : InstAlias<"outl $port", (OUT32ir i8imm:$port)>;
+
 // 'sldt <mem>' can be encoded with either sldtw or sldtq with the same
 // effect (both store to a 16-bit mem).  Force to sldtw to avoid ambiguity
 // errors, since its encoding is the most compact.