From 926b3fae1f983da70ab3756d690148e4854b866c Mon Sep 17 00:00:00 2001
From: Stan Cox <coxs@gnu.org>
Date: Fri, 3 May 1996 17:18:07 +0000
Subject: [PATCH] (movesicc, movehicc) Pentium Pro conditional move insns

From-SVN: r11917
---
 gcc/config/i386/i386.md | 125 ++++++++++++++++++++++++++++++++++++++--
 1 file changed, 121 insertions(+), 4 deletions(-)

diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 4ecfc8ccfb9..d585652c638 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -103,9 +103,9 @@
 ;; after the tstM or cmp) will actually emit the tstM or cmpM.
 
 ;; Processor type -- this attribute must exactly match the processor_type
-;; enumeration in rs6000.h.
+;; enumeration in i386.h.
 
-(define_attr "cpu" "i386,i486,pentium"
+(define_attr "cpu" "i386,i486,pentium,pentiumpro"
   (const (symbol_ref "ix86_cpu")))
 
 (define_insn "tstsi_1"
@@ -418,6 +418,16 @@
   "TARGET_80387"
   "* return output_float_compare (insn, operands);")
 
+(define_insn ""
+  [(set (cc0)
+	(match_operator 2 "VOIDmode_compare_op"
+			[(float_extend:XF
+			  (match_operand:DF 1 "nonimmediate_operand" "fm"))
+			 (match_operand:XF 0 "register_operand" "f")]))
+   (clobber (match_scratch:HI 3 "=a"))]
+  "TARGET_80387"
+  "* return output_float_compare (insn, operands);")
+
 (define_insn ""
   [(set (cc0)
 	(match_operator 2 "VOIDmode_compare_op"
@@ -4299,7 +4309,7 @@
   [(set (match_operand:DI 0 "register_operand" "=&r")
 	(ashiftrt:DI (match_operand:DI 1 "register_operand" "0")
 		     (match_operand:QI 2 "const_int_operand" "J")))]
-  ""
+  "CONST_OK_FOR_LETTER_P (INTVAL (operands[2]), 'J')"
   "*
 {
   rtx xops[4], low[1], high[1];
@@ -4460,7 +4470,7 @@
   [(set (match_operand:DI 0 "register_operand" "=&r")
 	(lshiftrt:DI (match_operand:DI 1 "register_operand" "0")
 		     (match_operand:QI 2 "const_int_operand" "J")))]
-  ""
+  "CONST_OK_FOR_LETTER_P (INTVAL (operands[2]), 'J')"
   "*
 {
   rtx xops[4], low[1], high[1];
@@ -6630,6 +6640,113 @@
   return \"repnz\;scas%B2\";
 }")
 
+/* Conditional move define_insns.  */
+
+(define_expand "movsicc"
+  [(match_dup 4)
+   (set (match_operand 0 "register_operand" "")
+	(if_then_else:SI (match_operand 1 "comparison_operator" "")
+			 (match_operand:SI 2 "nonimmediate_operand" "")
+			 (match_operand:SI 3 "nonimmediate_operand" "")))]
+  "TARGET_CMOVE"
+  "
+{
+  operands[4] = i386_compare_gen (i386_compare_op0, i386_compare_op1);
+}")
+
+(define_expand "movhicc"
+  [(match_dup 4)
+   (set (match_operand 0 "register_operand" "")
+	(if_then_else:HI (match_operand 1 "comparison_operator" "")
+			 (match_operand:HI 2 "nonimmediate_operand" "")
+			 (match_operand:HI 3 "nonimmediate_operand" "")))]
+  "TARGET_CMOVE"
+  "
+{
+  operands[4] = i386_compare_gen (i386_compare_op0, i386_compare_op1);
+}")
+
+(define_insn "movsicc_1"
+  [(set (match_operand:SI 0 "register_operand" "=r,r,&r,&r")
+	(if_then_else:SI (match_operator 1 "comparison_operator" 
+				[(cc0) (const_int 0)])
+		      (match_operand:SI 2 "nonimmediate_operand" "rm,0,rm,g")
+		      (match_operand:SI 3 "nonimmediate_operand" "0,rm,rm,g")))]
+  "TARGET_CMOVE"
+  "*
+{
+  if (cc_prev_status.flags & CC_IN_80387)
+    abort ();
+
+  if (which_alternative == 0)
+    {
+      /* r <- cond ? arg : r */
+      output_asm_insn (AS2 (cmov%C1,%2,%0), operands);
+    }
+  else if (which_alternative == 1)
+    {
+      /* r <- cond ? r : arg */
+      output_asm_insn (AS2 (cmov%N1,%3,%0), operands);
+    }
+  else if (which_alternative == 2)
+    {
+      /* r <- cond ? arg1 : arg2 */
+      output_asm_insn (AS2 (cmov%C1,%2,%0), operands);
+      output_asm_insn (AS2 (cmov%N1,%3,%0), operands);
+    }
+  else 
+    {
+      /* r <- cond ? arg1 : arg2 */
+      operands[4] = gen_label_rtx ();
+      output_asm_insn (AS2 (mov%L0,%2,%0), operands);
+      output_asm_insn (\"j%C1 %l4\", operands);
+      output_asm_insn (AS2 (mov%L0,%3,%0), operands);
+      ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, \"L\", CODE_LABEL_NUMBER (operands[4]));
+    }
+  RET;
+}")
+
+(define_insn "movhicc_1"
+  [(set (match_operand:HI 0 "register_operand" "=r,r,&r,&r")
+	(if_then_else:HI (match_operator 1 "comparison_operator" 
+				[(cc0) (const_int 0)])
+		      (match_operand:HI 2 "nonimmediate_operand" "rm,0,rm,g")
+		      (match_operand:HI 3 "nonimmediate_operand" "0,rm,rm,g")))]
+  "TARGET_CMOVE"
+  "*
+{
+  if (cc_prev_status.flags & CC_IN_80387)
+    abort ();
+
+  if (which_alternative == 0)
+    {
+      /* r <- cond ? arg : r */
+      output_asm_insn (AS2 (cmov%C1,%2,%0), operands);
+    }
+  else if (which_alternative == 1)
+    {
+      /* r <- cond ? r : arg */
+      output_asm_insn (AS2 (cmov%N1,%3,%0), operands);
+    }
+  else if (which_alternative == 2)
+    {
+      /* r <- cond ? arg1 : arg2 */
+      output_asm_insn (AS2 (cmov%C1,%2,%0), operands);
+      output_asm_insn (AS2 (cmov%N1,%3,%0), operands);
+    }
+  else 
+    {
+      /* r <- cond ? arg1 : arg2 */
+      operands[4] = gen_label_rtx ();
+      output_asm_insn (AS2 (mov%L0,%2,%0), operands);
+      output_asm_insn (\"j%C1 %l4\", operands);
+      output_asm_insn (AS2 (mov%L0,%3,%0), operands);
+      ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, \"L\", CODE_LABEL_NUMBER (operands[4]));
+    }
+  RET;
+}")
+
+
 (define_insn "strlensi_unroll"
   [(set (match_operand:SI 0 "register_operand" "=&r,&r")
 	(unspec:SI [(mem:BLK (match_operand:SI 1 "address_operand" "r,r"))
-- 
2.30.2