[PATCH] rs6000: emit insn with proper rounding mode for nearbyint [PR113353]

[Michael Meissner]

On Thu, Jan 22, 2026 at 05:18:58AM -0500, Vijay Shankar wrote:
> This patch emits instruction with proper rounding mode for nearbyint previously
> we emit xvrdpi which uses nearest away rounding mode but nearbyint requires
> rounding mode to be current rounding mode
> 
> Bootstrapped and regtested on powerpc64le-linux-gnu with no regressions.

Looks good.  Hopefully it can go into the tree.

> 2026-01-22  Vijay Shankar  <vijay@linux.ibm.com>
> 
> gcc/ChangeLog:
> 	PR target/113353
> 	* config/rs6000/rs6000.cc (rs6000_builtin_vectorized_function): Emit
> 	xvrdpic
> 
> gcc/testsuite/ChangeLog:
> 	PR target/113353
> 	* gcc.target/powerpc/vsx-vector-1.c: Fix testcase
> 	* gcc.target/powerpc/vsx-vector-2.c: Fix testcase
> 	* gcc.target/powerpc/vsx-vector-6-func-1op.c: Fix testcase
> ---
>  gcc/config/rs6000/rs6000.cc                              | 4 ++--
>  gcc/testsuite/gcc.target/powerpc/vsx-vector-1.c          | 2 +-
>  gcc/testsuite/gcc.target/powerpc/vsx-vector-2.c          | 2 +-
>  gcc/testsuite/gcc.target/powerpc/vsx-vector-6-func-1op.c | 4 ++--
>  4 files changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
> index 10b2cf983..fa0838109 100644
> --- a/gcc/config/rs6000/rs6000.cc
> +++ b/gcc/config/rs6000/rs6000.cc
> @@ -5696,12 +5696,12 @@ rs6000_builtin_vectorized_function (unsigned int fn, tree type_out,
>  	  && flag_unsafe_math_optimizations
>  	  && out_mode == DFmode && out_n == 2
>  	  && in_mode == DFmode && in_n == 2)
> -	return rs6000_builtin_decls[RS6000_BIF_XVRDPI];
> +	return rs6000_builtin_decls[RS6000_BIF_XVRDPIC];
>        if (VECTOR_UNIT_VSX_P (V4SFmode)
>  	  && flag_unsafe_math_optimizations
>  	  && out_mode == SFmode && out_n == 4
>  	  && in_mode == SFmode && in_n == 4)
> -	return rs6000_builtin_decls[RS6000_BIF_XVRSPI];
> +	return rs6000_builtin_decls[RS6000_BIF_XVRSPIC];
>        break;
>      CASE_CFN_RINT:
>        if (VECTOR_UNIT_VSX_P (V2DFmode)
> diff --git a/gcc/testsuite/gcc.target/powerpc/vsx-vector-1.c b/gcc/testsuite/gcc.target/powerpc/vsx-vector-1.c
> index 4d705e46d..8b4e1bbc6 100644
> --- a/gcc/testsuite/gcc.target/powerpc/vsx-vector-1.c
> +++ b/gcc/testsuite/gcc.target/powerpc/vsx-vector-1.c
> @@ -14,7 +14,7 @@
>  /* { dg-final { scan-assembler "xvrdpip" } } */
>  /* { dg-final { scan-assembler "xvrdpiz" } } */
>  /* { dg-final { scan-assembler "xvrdpic" } } */
> -/* { dg-final { scan-assembler "xvrdpi " } } */
> +/* { dg-final { scan-assembler "xvrdpic " } } */
>  
>  #ifndef SIZE
>  #define SIZE 1024
> diff --git a/gcc/testsuite/gcc.target/powerpc/vsx-vector-2.c b/gcc/testsuite/gcc.target/powerpc/vsx-vector-2.c
> index a0fe088bb..3f3d77f71 100644
> --- a/gcc/testsuite/gcc.target/powerpc/vsx-vector-2.c
> +++ b/gcc/testsuite/gcc.target/powerpc/vsx-vector-2.c
> @@ -14,7 +14,7 @@
>  /* { dg-final { scan-assembler "xvrspip" } } */
>  /* { dg-final { scan-assembler "xvrspiz" } } */
>  /* { dg-final { scan-assembler "xvrspic" } } */
> -/* { dg-final { scan-assembler "xvrspi " } } */
> +/* { dg-final { scan-assembler "xvrspic " } } */
>  
>  #ifndef SIZE
>  #define SIZE 1024
> diff --git a/gcc/testsuite/gcc.target/powerpc/vsx-vector-6-func-1op.c b/gcc/testsuite/gcc.target/powerpc/vsx-vector-6-func-1op.c
> index 6d2c64b24..7a0d42809 100644
> --- a/gcc/testsuite/gcc.target/powerpc/vsx-vector-6-func-1op.c
> +++ b/gcc/testsuite/gcc.target/powerpc/vsx-vector-6-func-1op.c
> @@ -10,13 +10,13 @@
>  /* { dg-final { scan-assembler-times {\mxvabssp\M} 1 } } */
>  /* { dg-final { scan-assembler-times {\mxvrspip\M} 1 } } */
>  /* { dg-final { scan-assembler-times {\mxvrspim\M} 1 } } */
> -/* { dg-final { scan-assembler-times {\mxvrspi\M} 1 } } */ 
> +/* { dg-final { scan-assembler-times {\mxvrspic\M} 1 } } */ 
>  /* { dg-final { scan-assembler-times {\mxvrspic\M} 1 } } */
>  /* { dg-final { scan-assembler-times {\mxvrspiz\M} 1 } } */
>  /* { dg-final { scan-assembler-times {\mxvabsdp\M} 1 } } */
>  /* { dg-final { scan-assembler-times {\mxvrdpip\M} 1 } } */
>  /* { dg-final { scan-assembler-times {\mxvrdpim\M} 1 } } */
> -/* { dg-final { scan-assembler-times {\mxvrdpi\M} 1 } } */
> +/* { dg-final { scan-assembler-times {\mxvrdpic\M} 1 } } */
>  /* { dg-final { scan-assembler-times {\mxvrdpic\M} 1 } } */
>  /* { dg-final { scan-assembler-times {\mxvrdpiz\M} 1 } } */
>  /* { dg-final { scan-assembler-times {\mxvsqrtdp\M} 1 } } */
> -- 
> 2.47.3
> 

-- 
Michael Meissner, IBM
PO Box 98, Ayer, Massachusetts, USA, 01432
email: meissner@linux.ibm.com