public inbox for gcc-cvs@sourceware.org
help / color / mirror / Atom feed
* [gcc r14-1467] xtensa: Add 'adddi3' and 'subdi3' insn patterns
@ 2023-06-01 14:14 Max Filippov
0 siblings, 0 replies; only message in thread
From: Max Filippov @ 2023-06-01 14:14 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:fe3ce0861081dd17e581c32b299b9c743d000470
commit r14-1467-gfe3ce0861081dd17e581c32b299b9c743d000470
Author: Takayuki 'January June' Suwa <jjsuwa_sys3175@yahoo.co.jp>
Date: Thu Jun 1 15:01:07 2023 +0900
xtensa: Add 'adddi3' and 'subdi3' insn patterns
More optimized than the default RTL generation.
gcc/ChangeLog:
* config/xtensa/xtensa.md (adddi3, subdi3):
New RTL generation patterns implemented according to the instruc-
tion idioms described in the Xtensa ISA reference manual (p. 600).
Diff:
---
gcc/config/xtensa/xtensa.md | 52 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 52 insertions(+)
diff --git a/gcc/config/xtensa/xtensa.md b/gcc/config/xtensa/xtensa.md
index eda1353894b..21afa747e89 100644
--- a/gcc/config/xtensa/xtensa.md
+++ b/gcc/config/xtensa/xtensa.md
@@ -190,6 +190,35 @@
(set_attr "mode" "SI")
(set_attr "length" "3")])
+(define_expand "adddi3"
+ [(set (match_operand:DI 0 "register_operand")
+ (plus:DI (match_operand:DI 1 "register_operand")
+ (match_operand:DI 2 "register_operand")))]
+ ""
+{
+ rtx lo_dest, hi_dest, lo_op0, hi_op0, lo_op1, hi_op1;
+ rtx_code_label *label;
+ if (rtx_equal_p (operands[0], operands[1])
+ || rtx_equal_p (operands[0], operands[2])
+ || ! REG_P (operands[1]) || ! REG_P (operands[2]))
+ FAIL;
+ lo_dest = gen_lowpart (SImode, operands[0]);
+ hi_dest = gen_highpart (SImode, operands[0]);
+ lo_op0 = gen_lowpart (SImode, operands[1]);
+ hi_op0 = gen_highpart (SImode, operands[1]);
+ lo_op1 = gen_lowpart (SImode, operands[2]);
+ hi_op1 = gen_highpart (SImode, operands[2]);
+ emit_insn (gen_addsi3 (hi_dest, hi_op0, hi_op1));
+ emit_insn (gen_addsi3 (lo_dest, lo_op0, lo_op1));
+ emit_cmp_and_jump_insns (lo_dest,
+ (REGNO (operands[1]) < REGNO (operands[2])
+ ? lo_op1 : lo_op0), GEU, const0_rtx,
+ SImode, true, label = gen_label_rtx ());
+ emit_insn (gen_addsi3 (hi_dest, hi_dest, const1_rtx));
+ emit_label (label);
+ DONE;
+})
+
(define_insn "addsf3"
[(set (match_operand:SF 0 "register_operand" "=f")
(plus:SF (match_operand:SF 1 "register_operand" "%f")
@@ -237,6 +266,29 @@
(const_int 5)
(const_int 6)))])
+(define_expand "subdi3"
+ [(set (match_operand:DI 0 "register_operand")
+ (minus:DI (match_operand:DI 1 "register_operand")
+ (match_operand:DI 2 "register_operand")))]
+ ""
+{
+ rtx lo_dest, hi_dest, lo_op0, hi_op0, lo_op1, hi_op1;
+ rtx_code_label *label;
+ lo_dest = gen_lowpart (SImode, operands[0]);
+ hi_dest = gen_highpart (SImode, operands[0]);
+ lo_op0 = gen_lowpart (SImode, operands[1]);
+ hi_op0 = gen_highpart (SImode, operands[1]);
+ lo_op1 = gen_lowpart (SImode, operands[2]);
+ hi_op1 = gen_highpart (SImode, operands[2]);
+ emit_insn (gen_subsi3 (hi_dest, hi_op0, hi_op1));
+ emit_cmp_and_jump_insns (lo_op0, lo_op1, GEU, const0_rtx,
+ SImode, true, label = gen_label_rtx ());
+ emit_insn (gen_addsi3 (hi_dest, hi_dest, constm1_rtx));
+ emit_label (label);
+ emit_insn (gen_subsi3 (lo_dest, lo_op0, lo_op1));
+ DONE;
+})
+
(define_insn "subsf3"
[(set (match_operand:SF 0 "register_operand" "=f")
(minus:SF (match_operand:SF 1 "register_operand" "f")
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2023-06-01 14:14 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-06-01 14:14 [gcc r14-1467] xtensa: Add 'adddi3' and 'subdi3' insn patterns Max Filippov
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).