From 7d70a287544dd915b66a5658a3857ebecb8b3583 Mon Sep 17 00:00:00 2001 From: Mahesh Bodapati Date: Tue, 17 Jan 2017 17:11:04 +0530 Subject: [PATCH 22/54] [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 Nagaraju Mekala * 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 7bbdbe1..3a53e24 100644 --- a/gcc/config/microblaze/microblaze.md +++ b/gcc/config/microblaze/microblaze.md @@ -449,6 +449,20 @@ (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")))] -- 2.7.4