[PATCH] MIPS/opcodes: Fix floor/round exclusions for R5900

[Maciej W. Rozycki]

On Sat, 17 Jan 2026, David Guillen Fandos wrote:

> Signed-off-by: David Guillen Fandos <david@davidgf.net>

 This is missing a change description giving justification for the patch.  
E.g. if the instructions are unimplemented, but were mistakenly included 
with R5900 support, then please state so.  Also is there any backing 
documentation available?

> diff --git a/opcodes/mips-opc.c b/opcodes/mips-opc.c
> index 234e8bb3409..4a1e842b09c 100644
> --- a/opcodes/mips-opc.c
> +++ b/opcodes/mips-opc.c
> @@ -1206,7 +1206,7 @@ const struct mips_opcode mips_builtin_opcodes[] =
>  {"floor.l.d",		"D,S",		0x4620000b, 0xffff003f, WR_1|RD_2|FP_D,		0,		I3_33,		0,	0 },
>  {"floor.l.s",		"D,S",		0x4600000b, 0xffff003f, WR_1|RD_2|FP_S|FP_D,	0,		I3_33,		0,	0 },
>  {"floor.w.d",		"D,S",		0x4620000f, 0xffff003f, WR_1|RD_2|FP_S|FP_D,	0,		I2,		0,	SF },
> -{"floor.w.s",		"D,S",		0x4600000f, 0xffff003f, WR_1|RD_2|FP_S,		0,		I2,		0,	0 },
> +{"floor.w.s",		"D,S",		0x4600000f, 0xffff003f, WR_1|RD_2|FP_S,		0,		I2,		0,	EE },
                                                                       ^
 While changing this line please correct `pinfo' flags to be preceded by a 
tab rather than space, just as intended with this array and still with the 
majority of elements.

> @@ -1823,7 +1823,7 @@ const struct mips_opcode mips_builtin_opcodes[] =
>  {"round.l.d",		"D,S",		0x46200008, 0xffff003f, WR_1|RD_2|FP_D,		0,		I3_33,		0,	0 },
>  {"round.l.s",		"D,S",		0x46000008, 0xffff003f, WR_1|RD_2|FP_S|FP_D,	0,		I3_33,		0,	0 },
>  {"round.w.d",		"D,S",		0x4620000c, 0xffff003f, WR_1|RD_2|FP_S|FP_D,	0,		I2,		0,	SF },
> -{"round.w.s",		"D,S",		0x4600000c, 0xffff003f, WR_1|RD_2|FP_S,		0,		I2,		0,	0 },
> +{"round.w.s",		"D,S",		0x4600000c, 0xffff003f, WR_1|RD_2|FP_S,		0,		I2,		0,	EE },
                                                                       ^
 Likewise here.

 There've been no regressions in my testing with this change in place so 
it's otherwise OK.

  Maciej