i386.c (x86_promote_QImode): Set for Athlon

	* i386.c (x86_promote_QImode): Set for Athlon
	(x86_fast_prefix): New global variable.
	(x86_arch_always_fancy_math_387): Fix formating.
	* i386.h (x86_fast_prefix): Declare
	(TARGET_FAST_PREFIX): define.
	* i386.md (and to strict_low_part, HI to SI
	promoting splitter): Use new macro.

	* i386.h (RTX_COSTS): float_extend is not for free for SSE.

From-SVN: r54521

gcc/ChangeLog

+Tue Jun 11 21:53:37 CEST 2002  Jan Hubicka  <jh@suse.cz>
+
+	* i386.c (x86_promote_QImode): Set for Athlon
+	(x86_fast_prefix): New global variable.
+	(x86_arch_always_fancy_math_387): Fix formating.
+	* i386.h (x86_fast_prefix): Declare
+	(TARGET_FAST_PREFIX): define.
+	* i386.md (and to strict_low_part, HI to SI
+	promoting splitter): Use new macro.
+
+	* i386.h (RTX_COSTS): float_extend is not for free for SSE.
+
 2002-06-11  Zack Weinberg  <zack@codesourcery.com>
 
 	* Makefile.in (distclean): Delete junk left in testsuite

gcc/config/i386/i386.c

@@ -376,7 +376,8 @@ const int x86_use_cltd = ~(m_PENT | m_K6);
 const int x86_read_modify_write = ~m_PENT;
 const int x86_read_modify = ~(m_PENT | m_PPRO);
 const int x86_split_long_moves = m_PPRO;
-const int x86_promote_QImode = m_K6 | m_PENT | m_386 | m_486;
+const int x86_promote_QImode = m_K6 | m_PENT | m_386 | m_486 | m_ATHLON;
+const int x86_fast_prefix = ~(m_PENT | m_486 | m_386);
 const int x86_single_stringop = m_386 | m_PENT4;
 const int x86_qimode_math = ~(0);
 const int x86_promote_qi_regs = 0;
@@ -393,7 +394,7 @@ const int x86_accumulate_outgoing_args = m_ATHLON | m_PENT4 | m_PPRO;
 const int x86_prologue_using_move = m_ATHLON | m_PENT4 | m_PPRO;
 const int x86_epilogue_using_move = m_ATHLON | m_PENT4 | m_PPRO;
 const int x86_decompose_lea = m_PENT4;
-const int x86_arch_always_fancy_math_387 = m_PENT|m_PPRO|m_ATHLON|m_PENT4;
+const int x86_arch_always_fancy_math_387 = m_PENT | m_PPRO | m_ATHLON | m_PENT4;
 
 /* In case the avreage insn count for single function invocation is
    lower than this constant, emit fast (but longer) prologue and

gcc/config/i386/i386.h

@@ -201,7 +201,7 @@ extern const int x86_double_with_add, x86_partial_reg_stall, x86_movx;
 extern const int x86_use_loop, x86_use_fiop, x86_use_mov0;
 extern const int x86_use_cltd, x86_read_modify_write;
 extern const int x86_read_modify, x86_split_long_moves;
-extern const int x86_promote_QImode, x86_single_stringop;
+extern const int x86_promote_QImode, x86_single_stringop, x86_fast_prefix;
 extern const int x86_himode_math, x86_qimode_math, x86_promote_qi_regs;
 extern const int x86_promote_hi_regs, x86_integer_DFmode_moves;
 extern const int x86_add_esp_4, x86_add_esp_8, x86_sub_esp_4, x86_sub_esp_8;
@@ -233,6 +233,7 @@ extern int x86_prefetch_sse;
 #define TARGET_READ_MODIFY_WRITE (x86_read_modify_write & CPUMASK)
 #define TARGET_READ_MODIFY (x86_read_modify & CPUMASK)
 #define TARGET_PROMOTE_QImode (x86_promote_QImode & CPUMASK)
+#define TARGET_FAST_PREFIX (x86_fast_prefix & CPUMASK)
 #define TARGET_SINGLE_STRINGOP (x86_single_stringop & CPUMASK)
 #define TARGET_QIMODE_MATH (x86_qimode_math & CPUMASK)
 #define TARGET_HIMODE_MATH (x86_himode_math & CPUMASK)
@@ -2698,7 +2699,10 @@ do {							\
     TOPLEVEL_COSTS_N_INSNS (ix86_cost->add);				\
 									\
   case FLOAT_EXTEND:							\
+    if (!TARGET_SSE_MATH						\
+	|| !VALID_SSE_REG_MODE (GET_MODE (X)))				\
       TOPLEVEL_COSTS_N_INSNS (0);					\
+    break;								\
 									\
   egress_rtx_costs:							\
     break;

gcc/config/i386/i386.md

@@ -7881,7 +7881,7 @@
 	(and (match_dup 0)
 	     (const_int -65536)))
    (clobber (reg:CC 17))]
-  "optimize_size"
+  "optimize_size || (TARGET_FAST_PREFIX && !TARGET_PARTIAL_REG_STALL)"
   [(set (strict_low_part (match_dup 1)) (const_int 0))]
   "operands[1] = gen_lowpart (HImode, operands[0]);")
 
@@ -16334,7 +16334,8 @@
    (clobber (reg:CC 17))]
   "! TARGET_PARTIAL_REG_STALL && reload_completed
    && ((GET_MODE (operands[0]) == HImode 
-	&& (!optimize_size || GET_CODE (operands[2]) != CONST_INT
+	&& ((!optimize_size && !TARGET_FAST_PREFIX)
+	    || GET_CODE (operands[2]) != CONST_INT
 	    || CONST_OK_FOR_LETTER_P (INTVAL (operands[2]), 'K')))
        || (GET_MODE (operands[0]) == QImode 
 	   && (TARGET_PROMOTE_QImode || optimize_size)))"

gcc/gcse.c

@@ -5153,6 +5153,11 @@ gcse_emit_move_after (src, dest, insn)
 
   new = emit_insn_after (gen_rtx_SET (VOIDmode, dest, src), insn);
 
+  /* want_to_gcse_p verifies that this move will be valid.  Still this call
+     is mandatory as it may create clobbers required by the pattern.  */
+  if (insn_invalid_p (insn))
+    abort ();
+
   /* Note the equivalence for local CSE pass.  */
   if ((note = find_reg_equal_equiv_note (insn)))
     eqv = XEXP (note, 0);