* [PATCH 1/5] xtensa: Document new -mextra-l32r-costs= Xtensa-specific option
@ 2022-06-14 3:34 Takayuki 'January June' Suwa
2022-06-16 0:03 ` Max Filippov
0 siblings, 1 reply; 2+ messages in thread
From: Takayuki 'January June' Suwa @ 2022-06-14 3:34 UTC (permalink / raw)
To: GCC Patches
gcc/ChangeLog:
* doc/invoke.texi: Document -mextra-l32r-costs= option.
---
gcc/doc/invoke.texi | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index b6c0305f198..2a3c638de40 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -1473,7 +1473,8 @@ See RS/6000 and PowerPC Options.
-mauto-litpools -mno-auto-litpools @gol
-mtarget-align -mno-target-align @gol
-mlongcalls -mno-longcalls @gol
--mabi=@var{abi-type}}
+-mabi=@var{abi-type} @gol
+-mextra-l32r-costs=@var{cycles}}
@emph{zSeries Options}
See S/390 and zSeries Options.
@@ -33526,6 +33527,14 @@ by 8 registers on entry so that its arguments are found in registers
pointer. Register window is rotated 8 registers back upon return.
When this version of the ABI is enabled the C preprocessor symbol
@code{__XTENSA_WINDOWED_ABI__} is defined.
+
+@item -mextra-l32r-costs=@var{n}
+@opindex mextra-l32r-costs
+Specify an extra cost of instruction RAM/ROM access for @code{L32R}
+instructions, in clock cycles. This affects, when optimizing for speed,
+whether loading a constant from literal pool using @code{L32R} or
+synthesizing the constant from a small one with a couple of arithmetic
+instructions. The default value is 0.
@end table
@node zSeries Options
--
2.20.1
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH 1/5] xtensa: Document new -mextra-l32r-costs= Xtensa-specific option
2022-06-14 3:34 [PATCH 1/5] xtensa: Document new -mextra-l32r-costs= Xtensa-specific option Takayuki 'January June' Suwa
@ 2022-06-16 0:03 ` Max Filippov
0 siblings, 0 replies; 2+ messages in thread
From: Max Filippov @ 2022-06-16 0:03 UTC (permalink / raw)
To: Takayuki 'January June' Suwa; +Cc: GCC Patches
On Mon, Jun 13, 2022 at 8:54 PM Takayuki 'January June' Suwa
<jjsuwa_sys3175@yahoo.co.jp> wrote:
>
>
> gcc/ChangeLog:
> * doc/invoke.texi: Document -mextra-l32r-costs= option.
> ---
> gcc/doc/invoke.texi | 11 ++++++++++-
> 1 file changed, 10 insertions(+), 1 deletion(-)
Committed to master.
--
Thanks.
-- Max
^ permalink raw reply [flat|nested] 2+ messages in thread
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