[PULL 45/48] tcg/tcg-op: Document wswap_i64() byte pattern

Richard Henderson posted 48 patches 1 year, 3 months ago
Maintainers: Cameron Esfahani <dirty@apple.com>, Roman Bolshakov <rbolshakov@ddn.com>, Paolo Bonzini <pbonzini@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Alexander Graf <agraf@csgraf.de>, Peter Maydell <peter.maydell@linaro.org>, "Edgar E. Iglesias" <edgar.iglesias@gmail.com>, Marcelo Tosatti <mtosatti@redhat.com>, Laurent Vivier <laurent@vivier.eu>, Stafford Horne <shorne@gmail.com>, Daniel Henrique Barboza <danielhb413@gmail.com>, "Cédric Le Goater" <clg@kaod.org>, David Gibson <david@gibson.dropbear.id.au>, Greg Kurz <groug@kaod.org>, Nicholas Piggin <npiggin@gmail.com>, Palmer Dabbelt <palmer@dabbelt.com>, Alistair Francis <alistair.francis@wdc.com>, Bin Meng <bin.meng@windriver.com>, Weiwei Li <liweiwei@iscas.ac.cn>, Liu Zhiwei <zhiwei_liu@linux.alibaba.com>, Yoshinori Sato <ysato@users.sourceforge.jp>, Halil Pasic <pasic@linux.ibm.com>, Christian Borntraeger <borntraeger@linux.ibm.com>, Thomas Huth <thuth@redhat.com>, David Hildenbrand <david@redhat.com>, Ilya Leoshkevich <iii@linux.ibm.com>, Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>, Artyom Tarasenko <atar4qemu@gmail.com>, Bastian Koppelmann <kbastian@mail.uni-paderborn.de>, WANG Xuerui <git@xen0n.name>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Aurelien Jarno <aurelien@aurel32.net>, Huacai Chen <chenhuacai@kernel.org>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>, Stefan Weil <sw@weilnetz.de>
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[PULL 45/48] tcg/tcg-op: Document wswap_i64() byte pattern
Posted by Richard Henderson 1 year, 3 months ago
From: Philippe Mathieu-Daudé <philmd@linaro.org>

Document wswap_i64(), added in commit 46be8425ff
("tcg: Implement tcg_gen_{h,w}swap_{i32,i64}").

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230823145542.79633-8-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/tcg-op.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c
index 58572526b7..02a8cadcc0 100644
--- a/tcg/tcg-op.c
+++ b/tcg/tcg-op.c
@@ -1950,6 +1950,11 @@ void tcg_gen_hswap_i64(TCGv_i64 ret, TCGv_i64 arg)
     tcg_temp_free_i64(t1);
 }
 
+/*
+ * wswap_i64: Swap 32-bit words within a 64-bit value.
+ *
+ * Byte pattern: abcdefgh -> efghabcd
+ */
 void tcg_gen_wswap_i64(TCGv_i64 ret, TCGv_i64 arg)
 {
     /* Swapping 2 32-bit elements is a rotate. */
-- 
2.34.1