OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

[nvptx] Handle move from DF subreg to DF reg in nvptx_output_mov_insn 

When compiling test-case gcc.dg/atomic/c11-atomic-exec-1.c, we run into
these ptxas errors:
...
line 100; error: Rounding modifier required for instruction 'cvt'
line 105; error: Rounding modifier required for instruction 'cvt'
...

The problem is that this move:
...
//(insn 13 11 14 2
//      (set (reg:DF 28 [ _9 ])
//           (subreg:DF (reg:TI 22 [ _1 ]) 0)) 9 {*movdf_insn}
//       (nil))
                cvt.f64.u64     %r28, %r22$0;
...
is emitted as cvt.f64.u64, while it should be a mov.b64 instead.

Fix this by handling this case in nvptx_output_mov_insn.

Tested on nvptx.

gcc/ChangeLog:

	PR target/97158
	* config/nvptx/nvptx.c (nvptx_output_mov_insn): Handle move from
	DF subreg to DF reg.
This commit is contained in:
Tom de Vries 2020-09-22 13:16:39 +02:00
parent 28d3b78dff
commit ca52f937ff
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gcc/config/nvptx/nvptx.c
View File

@ -2349,6 +2349,7 @@ const char *
nvptx_output_mov_insn (rtx dst, rtx src)
{
machine_mode dst_mode = GET_MODE (dst);
machine_mode src_mode = GET_MODE (src);
machine_mode dst_inner = (GET_CODE (dst) == SUBREG
? GET_MODE (XEXP (dst, 0)) : dst_mode);
machine_mode src_inner = (GET_CODE (src) == SUBREG
@ -2375,7 +2376,7 @@ nvptx_output_mov_insn (rtx dst, rtx src)
if (GET_MODE_SIZE (dst_inner) == GET_MODE_SIZE (src_inner))
{
if (GET_MODE_BITSIZE (dst_mode) == 128
&& GET_MODE_BITSIZE (GET_MODE (src)) == 128)
&& GET_MODE_BITSIZE (src_mode) == 128)
{
/* mov.b128 is not supported. */
if (dst_inner == V2DImode && src_inner == TImode)
@ -2388,6 +2389,10 @@ nvptx_output_mov_insn (rtx dst, rtx src)
return "%.\tmov.b%T0\t%0, %1;";
}
if (GET_MODE_BITSIZE (src_inner) == 128
&& GET_MODE_BITSIZE (src_mode) == 64)
return "%.\tmov.b%T0\t%0, %1;";
return "%.\tcvt%t0%t1\t%0, %1;";
}