rl78.md: New define_expand "smaxdi3".

2018-01-22  Sebastian Perta  <sebastian.perta@renesas.com>

	* config/rl78/rl78.md: New define_expand "smaxdi3".

2018-01-22  Sebastian Perta  <sebastian.perta@renesas.com>
 
	* config/rl78/smaxdi3.S: New assembly file.
	* config/rl78/t-rl78: Added smaxdi3.S to LIB2ADD.

From-SVN: r256953

3 files changed, 83 insertions, 1 deletions

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index a71ab4f..1efdf9d 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,5 +1,10 @@
 2018-01-22  Sebastian Perta  <sebastian.perta@renesas.com>
  
+	* config/rl78/smaxdi3.S: New assembly file.
+	* config/rl78/t-rl78: Added smaxdi3.S to LIB2ADD.
+
+2018-01-22  Sebastian Perta  <sebastian.perta@renesas.com>
+ 
 	* config/rl78/umaxdi3.S: New assembly file.
 	* config/rl78/t-rl78: Added umaxdi3.S to LIB2ADD.
 	
diff --git a/libgcc/config/rl78/smaxdi3.S b/libgcc/config/rl78/smaxdi3.S
new file mode 100644
index 0000000..fe52e21
--- /dev/null
+++ b/libgcc/config/rl78/smaxdi3.S
@@ -0,0 +1,76 @@
+;   Copyright (C) 2017 Free Software Foundation, Inc.
+;   Contributed by Sebastian Perta.
+; 
+; This file is free software; you can redistribute it and/or modify it
+; under the terms of the GNU General Public License as published by the
+; Free Software Foundation; either version 3, or (at your option) any
+; later version.
+; 
+; This file is distributed in the hope that it will be useful, but
+; WITHOUT ANY WARRANTY; without even the implied warranty of
+; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+; General Public License for more details.
+; 
+; Under Section 7 of GPL version 3, you are granted additional
+; permissions described in the GCC Runtime Library Exception, version
+; 3.1, as published by the Free Software Foundation.
+;
+; You should have received a copy of the GNU General Public License and
+; a copy of the GCC Runtime Library Exception along with this program;
+; see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+; <http://www.gnu.org/licenses/>.
+
+
+#include "vregs.h"
+
+    .text
+
+START_FUNC ___smaxdi3
+
+    ; copy first argument/operand to the output registers
+    movw   ax, [sp+4]
+    movw   r8, ax
+    movw   ax, [sp+6]
+    movw   r10, ax
+    movw   ax, [sp+8]
+    movw   r12, ax
+    movw   ax, [sp+10]
+    movw   r14, ax
+
+    ; use 16-bit compares from the most significant words downto the least significant ones
+    movw   ax, [sp+18]
+    cmpw   ax, r14
+    xor1   CY, a.7   ; first compare accounts for the
+    xor1   CY, r15.7 ; sign bits of the two operands
+    bh     $.L1
+    bnz    $.L2
+
+    movw   ax, [sp+16]
+    cmpw   ax, r12
+    bh     $.L1
+    bnz    $.L2
+
+    movw   ax, [sp+14]
+    cmpw   ax, r10
+    bh     $.L1
+    bnz    $.L2
+
+    movw   ax, [sp+12]
+    cmpw   ax, r8
+    bh     $.L1
+    ret
+
+.L1:
+    ; copy second argument/operand to the output registers
+    movw   ax, [sp+12]
+    movw   r8, ax
+    movw   ax, [sp+14]
+    movw   r10, ax
+    movw   ax, [sp+16]
+    movw   r12, ax
+    movw   ax, [sp+18]
+    movw   r14, ax
+.L2:
+    ret
+
+END_FUNC ___smaxdi3
diff --git a/libgcc/config/rl78/t-rl78 b/libgcc/config/rl78/t-rl78
index 2c8194c..310155d 100644
--- a/libgcc/config/rl78/t-rl78
+++ b/libgcc/config/rl78/t-rl78
@@ -33,7 +33,8 @@ LIB2ADD = \
 	$(srcdir)/config/rl78/cmpsi2.S \
 	$(srcdir)/config/rl78/adddi3.S \
 	$(srcdir)/config/rl78/subdi3.S \
-	$(srcdir)/config/rl78/umaxdi3.S
+	$(srcdir)/config/rl78/umaxdi3.S \
+	$(srcdir)/config/rl78/smaxdi3.S
 
 LIB2FUNCS_EXCLUDE = _clzhi2 _clzsi2 _ctzhi2 _ctzsi2 \
   _popcounthi2 _popcountsi2 \