From 67db74e02c1608ceb6845db4a6a80f7804f26a6c Mon Sep 17 00:00:00 2001
From: Daniel Sanders <daniel.sanders@imgtec.com>
Date: Mon, 24 Mar 2014 14:05:39 +0000
Subject: [mips] Implement shorthand add / sub forms for MIPS.

Summary:
- If only two registers are passed to a three-register operation, then the
  first argument is both source and destination register.

- If a non-register is passed as the last argument, generate the immediate
  version of the instruction.

Also mark DADD commutative and add scheduling information (to the generic
scheduler), and implement DSUB.

Patch by David Chisnall
His work was sponsored by: DARPA, AFRL

CC: theraven

Differential Revision: http://llvm-reviews.chandlerc.com/D3148

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204605 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/MC/Mips/mips-alu-instructions.s   | 21 +++++++++++++++++++++
 test/MC/Mips/mips64-alu-instructions.s | 23 +++++++++++++++++++++++
 2 files changed, 44 insertions(+)

(limited to 'test')

diff --git a/test/MC/Mips/mips-alu-instructions.s b/test/MC/Mips/mips-alu-instructions.s
index 68a8da07c2..1ee994f09a 100644
--- a/test/MC/Mips/mips-alu-instructions.s
+++ b/test/MC/Mips/mips-alu-instructions.s
@@ -118,3 +118,24 @@
     negu   $6,$7
     move   $7,$8
     rdhwr   $5, $29
+
+#------------------------------------------------------------------------------
+# Shortcuts for arithmetic instructions
+#------------------------------------------------------------------------------
+
+# CHECK:	add	$9, $9, $3	# encoding: [0x20,0x48,0x23,0x01]
+# CHECK:	addu	$9, $9, $3	# encoding: [0x21,0x48,0x23,0x01]
+# CHECK:	addi	$9, $9, 10	# encoding: [0x0a,0x00,0x29,0x21]
+# CHECK:	addiu	$9, $9, 10	# encoding: [0x0a,0x00,0x29,0x25]
+# CHECK:	sub	$9, $9, $3	# encoding: [0x22,0x48,0x23,0x01]
+# CHECK:	subu	$9, $9, $3	# encoding: [0x23,0x48,0x23,0x01]
+# CHECK:	addi	$9, $9, -10	# encoding: [0xf6,0xff,0x29,0x21]
+# CHECK:	addiu	$9, $9, -10	# encoding: [0xf6,0xff,0x29,0x25]
+	add	$9, $3
+	addu	$9, $3
+	add	$9, 10
+	addu	$9, 10
+	sub	$9, $3
+	subu	$9, $3
+	sub	$9, 10
+	subu	$9, 10
diff --git a/test/MC/Mips/mips64-alu-instructions.s b/test/MC/Mips/mips64-alu-instructions.s
index 8262a46ee4..12c49a4621 100644
--- a/test/MC/Mips/mips64-alu-instructions.s
+++ b/test/MC/Mips/mips64-alu-instructions.s
@@ -81,6 +81,7 @@
 # CHECK:  msubu  $6, $7          # encoding: [0x05,0x00,0xc7,0x70]
 # CHECK:  mult   $3, $5          # encoding: [0x18,0x00,0x65,0x00]
 # CHECK:  multu  $3, $5          # encoding: [0x19,0x00,0x65,0x00]
+# CHECK:  dsub    $9, $6, $7     # encoding: [0x2e,0x48,0xc7,0x00]
 # CHECK:  dsubu   $4, $3, $5     # encoding: [0x2f,0x20,0x65,0x00]
 # CHECK:  move    $7, $8         # encoding: [0x2d,0x38,0x00,0x01]
 # CHECK:  .set    push
@@ -104,6 +105,28 @@
     msubu  $6,$7
     mult   $3,$5
     multu  $3,$5
+    dsub    $9,$6,$7
     dsubu   $4,$3,$5
     move   $7,$8
     rdhwr   $5, $29
+
+#------------------------------------------------------------------------------
+# Shortcuts for arithmetic instructions
+#------------------------------------------------------------------------------
+
+# CHECK:	dadd	$9, $9, $3	# encoding: [0x2c,0x48,0x23,0x01]
+# CHECK:	daddu	$9, $9, $3	# encoding: [0x2d,0x48,0x23,0x01]
+# CHECK:	daddi	$9, $9, 10	# encoding: [0x0a,0x00,0x29,0x61]
+# CHECK:	daddiu	$9, $9, 10	# encoding: [0x0a,0x00,0x29,0x65]
+# CHECK:	dsub	$9, $9, $3	# encoding: [0x2e,0x48,0x23,0x01]
+# CHECK:	dsubu	$9, $9, $3	# encoding: [0x2f,0x48,0x23,0x01]
+# CHECK:	daddi	$9, $9, -10	# encoding: [0xf6,0xff,0x29,0x61]
+# CHECK:	daddiu	$9, $9, -10	# encoding: [0xf6,0xff,0x29,0x65]
+	dadd	$9, $3
+	daddu	$9, $3
+	dadd	$9, 10
+	daddu	$9, 10
+	dsub	$9, $3
+	dsubu	$9, $3
+	dsub	$9, 10
+	dsubu	$9, 10
-- 
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