1 files changed, 61 insertions, 0 deletions

diff --git a/meta-microblaze/recipes-devtools/gcc/gcc-10/0020-Patch-microblaze-Inline-Expansion-of-fsqrt-builtin.patch b/meta-microblaze/recipes-devtools/gcc/gcc-10/0020-Patch-microblaze-Inline-Expansion-of-fsqrt-builtin.patch
new file mode 100644
index 00000000..cc1c3d7e
--- /dev/null
+++ b/meta-microblaze/recipes-devtools/gcc/gcc-10/0020-Patch-microblaze-Inline-Expansion-of-fsqrt-builtin.patch
@@ -0,0 +1,61 @@
+From 1bbf48097cf2da98e03139b499a5a74bc68e6abc Mon Sep 17 00:00:00 2001
+From: Mahesh Bodapati <mbodapat@xilinx.com>
+Date: Tue, 17 Jan 2017 17:11:04 +0530
+Subject: [PATCH 20/58] [Patch,microblaze]: Inline Expansion of fsqrt builtin.
+
+The changes are made in the patch for the inline expansion of
+the fsqrt builtin with fqrt instruction. The sqrt math function
+takes double as argument and return double as argument. The
+pattern is selected while expanding the unary op through
+expand_unop which passes DFmode and the DFmode pattern was
+not there returning zero. Thus the sqrt math function is not
+inlined and expanded. The pattern with DFmode argument is added.
+Also the source and destination argument is not same the DF
+through two different consecutive registers with lower 32 bit
+is the argument passed to sqrt and the higher 32 bit is zero.
+If the source and destinations are different the DFmode 64 bits
+registers is not set properly giving the problem in runtime. Such
+changes are taken care in the implementation of the pattern for
+DFmode for inline expansion of the sqrt.
+
+ChangeLog:
+2015-06-16  Ajit Agarwal  <ajitkum@xilinx.com>
+            Nagaraju Mekala <nmekala@xilinx.com>
+
+        * config/microblaze/microblaze.md (sqrtdf2): New
+        pattern.
+
+Signed-off-by:Ajit Agarwal ajitkum@xilinx.com
+              Nagaraju Mekala nmekala@xilinx.com
+---
+ gcc/config/microblaze/microblaze.md | 14 ++++++++++++++
+ 1 file changed, 14 insertions(+)
+
+diff --git a/gcc/config/microblaze/microblaze.md b/gcc/config/microblaze/microblaze.md
+index 8f9baec826b..986d9c3aa25 100644
+--- a/gcc/config/microblaze/microblaze.md
++++ b/gcc/config/microblaze/microblaze.md
+@@ -451,6 +451,20 @@
+   (set_attr "mode"      "SF")
+   (set_attr "length"    "4")])
+ 
++(define_insn "sqrtdf2"
++  [(set (match_operand:DF 0 "register_operand" "=d")
++        (sqrt:DF (match_operand:DF 1 "register_operand" "dG")))]
++  "TARGET_HARD_FLOAT && TARGET_FLOAT_SQRT"
++  {
++    if (REGNO (operands[0]) == REGNO (operands[1]))
++      return "fsqrt\t%0,%1";
++    else
++      return "fsqrt\t%0,%1\n\taddk\t%D0,%D1,r0";
++  }
++  [(set_attr "type"     "fsqrt")
++   (set_attr "mode"      "SF")
++   (set_attr "length"    "4")])
++
+ (define_insn "fix_truncsfsi2"
+   [(set (match_operand:SI 0 "register_operand" "=d")
+         (fix:SI (match_operand:SF 1 "register_operand" "d")))]
+-- 
+2.17.1
+