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Commit 7e08e190 by Jan Hubicka Committed by Jakub Jelinek
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i386.h: Clarify CCNOmode description in comment. 

	* config/i386/i386.h: Clarify CCNOmode description in comment.
	(EXTRA_CC_MODES): Remove CCRCmode.
	* config/i386/i386.c (ix86_comparison_operator): Remove CCRCmode.
	(put_condition_code, ix86_match_ccmode): Likewise.
	(ix86_cc_mode): Likewise.  Fix comment.
	(ix86_expand_strlensi_unroll_1): *rc patterns are gone.
	* config/i386/i386.md: Add unspec 12 description.
	(adddi3 split): Use unspec 12 instead of CCRCmode.
	(addsi3_carry_rc): Remove.
	(addsi3_cc, addqi3_cc): New patterns.
	(addsi_3): Swap operands, match CCZmode.
	(addsi_4): Rewritten.
	(addsi_5): Renamed from addsi_6.
	(addsi_6): Removed.
	(addhi_3): Swap operands, match CCZmode.
	(addhi_4): Rewritten.
	(addhi_5): Renamed from addhi_6.
	(addhi_6): Removed.
	(addqi_3): Swap operands, match CCZmode.
	(addqi_4): Rewritten.
	(addqi_5): Renamed from addqi_6.  Use =q constraint for clobber.
	(subsi3_carry_rc): Removed.
	(iorqi_3): Use =q constraint for clobber.
	(xorqi_cc_2): Likewise.
	(negdi2_1 split): Don't use CCRCmode, use ltu instead of gtu.
	(x86_movsicc_0_m1_rc): Removed.
	(cmp?i peepholes): Remove neg.  Use CCGCmode instead of CCRCmode.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>

From-SVN: r37166
parent 99fa3f5e
Showing with 51 additions and 46 deletions
gcc/ChangeLog
2000-10-31 Jan Hubicka <jh@suse.cz>
Jakub Jelinek <jakub@redhat.com>
* config/i386/i386.h: Clarify CCNOmode description in comment.
(EXTRA_CC_MODES): Remove CCRCmode.
* config/i386/i386.c (ix86_comparison_operator): Remove CCRCmode.
(put_condition_code, ix86_match_ccmode): Likewise.
(ix86_cc_mode): Likewise. Fix comment.
(ix86_expand_strlensi_unroll_1): *rc patterns are gone.
* config/i386/i386.md: Add unspec 12 description.
(adddi3 split): Use unspec 12 instead of CCRCmode.
(addsi3_carry_rc): Remove.
(addsi3_cc, addqi3_cc): New patterns.
(addsi_3): Swap operands, match CCZmode.
(addsi_4): Rewritten.
(addsi_5): Renamed from addsi_6.
(addsi_6): Removed.
(addhi_3): Swap operands, match CCZmode.
(addhi_4): Rewritten.
(addhi_5): Renamed from addhi_6.
(addhi_6): Removed.
(addqi_3): Swap operands, match CCZmode.
(addqi_4): Rewritten.
(addqi_5): Renamed from addqi_6. Use =q constraint for clobber.
(subsi3_carry_rc): Removed.
(iorqi_3): Use =q constraint for clobber.
(xorqi_cc_2): Likewise.
(negdi2_1 split): Don't use CCRCmode, use ltu instead of gtu.
(x86_movsicc_0_m1_rc): Removed.
(cmp?i peepholes): Remove neg. Use CCGCmode instead of CCRCmode.
2000-10-31 Joseph S. Myers <jsm28@cam.ac.uk>
* c-typeck.c (build_unary_op): If pedantic, pedwarn for increment
......
gcc/config/i386/i386.c
......@@ -1305,22 +1305,18 @@ ix86_comparison_operator (op, mode)
return 1;
case LT: case GE:
inmode = GET_MODE (XEXP (op, 0));
if (inmode == CCmode || inmode == CCGCmode || inmode == CCRCmode
if (inmode == CCmode || inmode == CCGCmode
|| inmode == CCGOCmode || inmode == CCNOmode)
return 1;
return 0;
case LTU: case GTU:
inmode = GET_MODE (XEXP (op, 0));
return inmode == CCmode;
case LEU: case ORDERED: case UNORDERED: case GEU:
case LTU: case GTU: case LEU: case ORDERED: case UNORDERED: case GEU:
inmode = GET_MODE (XEXP (op, 0));
if (inmode == CCmode || inmode == CCRCmode)
if (inmode == CCmode)
return 1;
return 0;
case GT: case LE:
inmode = GET_MODE (XEXP (op, 0));
if (inmode == CCmode || inmode == CCGCmode || inmode == CCNOmode
|| inmode == CCRCmode)
if (inmode == CCmode || inmode == CCGCmode || inmode == CCNOmode)
return 1;
return 0;
default:
......@@ -3112,22 +3108,21 @@ put_condition_code (code, mode, reverse, fp, file)
suffix = "ne";
break;
case GT:
if (mode != CCmode && mode != CCNOmode && mode != CCGCmode
&& mode != CCRCmode)
if (mode != CCmode && mode != CCNOmode && mode != CCGCmode)
abort ();
suffix = "g";
break;
case GTU:
/* ??? Use "nbe" instead of "a" for fcmov losage on some assemblers.
Those same assemblers have the same but opposite losage on cmov. */
if (mode != CCmode && mode != CCRCmode)
if (mode != CCmode)
abort ();
suffix = fp ? "nbe" : "a";
break;
case LT:
if (mode == CCNOmode || mode == CCGOCmode)
suffix = "s";
else if (mode == CCmode || mode == CCGCmode || mode == CCRCmode)
else if (mode == CCmode || mode == CCGCmode)
suffix = "l";
else
abort ();
......@@ -3140,33 +3135,26 @@ put_condition_code (code, mode, reverse, fp, file)
case GE:
if (mode == CCNOmode || mode == CCGOCmode)
suffix = "ns";
else if (mode == CCmode || mode == CCGCmode || mode == CCRCmode)
else if (mode == CCmode || mode == CCGCmode)
suffix = "ge";
else
abort ();
break;
case GEU:
/* ??? As above. */
if (mode != CCmode && mode != CCRCmode)
if (mode != CCmode)
abort ();
if (mode == CCRCmode)
suffix = "be";
else
suffix = fp ? "nb" : "ae";
suffix = fp ? "nb" : "ae";
break;
case LE:
if (mode != CCmode && mode != CCGCmode && mode != CCNOmode
&& mode != CCRCmode)
if (mode != CCmode && mode != CCGCmode && mode != CCNOmode)
abort ();
suffix = "le";
break;
case LEU:
if (mode != CCmode)
abort ();
if (mode == CCRCmode)
suffix = fp ? "nb" : "ae";
else
suffix = "be";
suffix = "be";
break;
case UNORDERED:
suffix = "p";
......@@ -4594,13 +4582,6 @@ ix86_match_ccmode (insn, req_mode)
return 0;
break;
case CCmode:
if (req_mode == CCRCmode)
return 0;
goto no_carry;
case CCRCmode:
if (req_mode == CCmode)
return 0;
no_carry:
if (req_mode == CCGCmode)
return 0;
/* FALLTHRU */
......@@ -4732,18 +4713,15 @@ ix86_cc_mode (code, op0, op1)
case NE: /* ZF!=0 */
return CCZmode;
/* Codes needing carry flag. */
case LTU: /* CF=1 */
case LEU: /* CF=1 | ZF=1 */
return CCmode;
case GEU: /* CF=0 */
case GTU: /* CF=0 & ZF=0 */
if (GET_CODE (op1) == NEG)
return CCRCmode;
case LTU: /* CF=1 */
case LEU: /* CF=1 | ZF=1 */
return CCmode;
/* Codes possibly doable only with sign flag when
comparing against zero. */
case GE: /* SF=OF or SF=0 */
case LT: /* SF<>OF or SF=0 */
case LT: /* SF<>OF or SF=1 */
if (op1 == const0_rtx)
return CCGOCmode;
else
......@@ -6197,8 +6175,8 @@ ix86_expand_strlensi_unroll_1 (out, align_rtx, scratch)
/* Avoid branch in fixing the byte. */
tmpreg = gen_lowpart (QImode, tmpreg);
emit_insn (gen_addqi3_ccrc (tmpreg, tmpreg, tmpreg));
emit_insn (gen_subsi3_carry_rc (out, out, GEN_INT (3)));
emit_insn (gen_addqi3_cc (tmpreg, tmpreg, tmpreg));
emit_insn (gen_subsi3_carry (out, out, GEN_INT (3)));
emit_label (end_0_label);
}
......
gcc/config/i386/i386.h
......@@ -2478,8 +2478,8 @@ while (0)
equality comparisons are being done.
Add CCNO to indicate comparisons against zero that requires
No Overflow. Sign bit test is used instead and thus
can be used to form "a&b>0" type of tests.
Overflow flag to be unset. Sign bit test is used instead and
thus can be used to form "a&b>0" type of tests.
Add CCGC to indicate comparisons agains zero that allows
unspecified garbage in the Carry flag. This mode is used
......@@ -2490,14 +2490,10 @@ while (0)
mode is used to simulate comparisons of (a-b) and (a+b)
against zero using sub/cmp/add operations.
Add CCZ to indicate that only the Zero flag is valid.
Add CCRC to indicate that carry flag is valid, but reversed.
*/
Add CCZ to indicate that only the Zero flag is valid. */
#define EXTRA_CC_MODES \
CC(CCGCmode, "CCGC") \
CC(CCRCmode, "CCRC") \
CC(CCGOCmode, "CCGOC") \
CC(CCNOmode, "CCNO") \
CC(CCZmode, "CCZ") \
......
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