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From: "carrot at google dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/61202] gcc generates invalid sqdmulh instruction
Date: Sat, 17 May 2014 00:45:00 -0000	[thread overview]
Message-ID: <bug-61202-4-6ztvw5k5r3@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-61202-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61202

--- Comment #1 from Carrot <carrot at google dot com> ---
In arm_neon.h, we have

__extension__ static __inline int16x8_t __attribute__ ((__always_inline__))
vqdmulhq_n_s16 (int16x8_t a, int16_t b)
{
  int16x8_t result;
  __asm__ ("sqdmulh %0.8h,%1.8h,%2.h[0]"
           : "=w"(result)
           : "w"(a), "w"(b)
           : /* No clobbers */);
  return result;
}

The register constraint for the last operand of sqdmulh is "w", it means
FP_REGS, the correct constraint should be "x", means FP_LO_REGS.

The trunk has the same problem.


  reply	other threads:[~2014-05-17  0:45 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-16 17:08 [Bug target/61202] New: " carrot at google dot com
2014-05-17  0:45 ` carrot at google dot com [this message]
2014-05-19  8:31 ` [Bug target/61202] " jgreenhalgh at gcc dot gnu.org
2014-05-19 19:51 ` carrot at google dot com
2014-05-21 20:47 ` carrot at gcc dot gnu.org
2014-05-27 15:42 ` java4ada at yahoo dot com

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