[newlib-cygwin/main] RISC-V: Size optimized versions: Replace add with addi

[Jeff Johnston]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=dde1d9a6f04cf7f6495034f62740a09e64588ebc

commit dde1d9a6f04cf7f6495034f62740a09e64588ebc
Author: m fally <marlene.fally@gmail.com>
Date:   Thu Apr 10 13:23:08 2025 +0200

    RISC-V: Size optimized versions: Replace add with addi
    
    Replace add instructions with addi where applicable in
    the size optimized versions of memmove(), memset(), memcpy(),
    and strcmp(). This change does not affect the functions themselves
    and is only done to improve syntactic accuracy.
    
    Reviewed-by: Christian Herber <christian.herber@oss.nxp.com>
    Signed-off-by: m fally <marlene.fally@gmail.com>

Diff:
---
 newlib/libc/machine/riscv/memcpy-asm.S | 6 +++---
 newlib/libc/machine/riscv/memmove.S    | 2 +-
 newlib/libc/machine/riscv/memset.S     | 4 ++--
 newlib/libc/machine/riscv/strcmp.S     | 4 ++--
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/newlib/libc/machine/riscv/memcpy-asm.S b/newlib/libc/machine/riscv/memcpy-asm.S
index e9fe381d9..2771285f9 100644
--- a/newlib/libc/machine/riscv/memcpy-asm.S
+++ b/newlib/libc/machine/riscv/memcpy-asm.S
@@ -20,9 +20,9 @@ memcpy:
 1:
   lbu a4, 0(a1)
   sb a4, 0(a3)
-  add   a2, a2, -1
-  add   a3, a3, 1
-  add   a1, a1, 1
+  addi   a2, a2, -1
+  addi   a3, a3, 1
+  addi   a1, a1, 1
   bnez a2, 1b
 
 2:
diff --git a/newlib/libc/machine/riscv/memmove.S b/newlib/libc/machine/riscv/memmove.S
index 6ecad9ad6..061472ca2 100644
--- a/newlib/libc/machine/riscv/memmove.S
+++ b/newlib/libc/machine/riscv/memmove.S
@@ -29,7 +29,7 @@ memmove:
   add   a1, a1, a3
 .Lcopy:
   lbu a5, 0(a1)
-  add   a2, a2, -1		/* copy bytes as long as a2 (= the number of bytes to be copied) > 0. the increment is done here to relax the RAW dependency between load and store */
+  addi   a2, a2, -1		/* copy bytes as long as a2 (= the number of bytes to be copied) > 0. the increment is done here to relax the RAW dependency between load and store */
   sb a5, 0(a4)
   bnez a2, .Lincrement
 
diff --git a/newlib/libc/machine/riscv/memset.S b/newlib/libc/machine/riscv/memset.S
index 943835dc5..3d207e7eb 100644
--- a/newlib/libc/machine/riscv/memset.S
+++ b/newlib/libc/machine/riscv/memset.S
@@ -19,8 +19,8 @@ memset:
 
 .Lset:
   sb a1, 0(a3)
-  add   a2, a2, -1
-  add   a3, a3, 1
+  addi   a2, a2, -1
+  addi   a3, a3, 1
   bnez a2, .Lset
 
 .Ldone:
diff --git a/newlib/libc/machine/riscv/strcmp.S b/newlib/libc/machine/riscv/strcmp.S
index cc29b7b8b..5d3370f6b 100644
--- a/newlib/libc/machine/riscv/strcmp.S
+++ b/newlib/libc/machine/riscv/strcmp.S
@@ -19,8 +19,8 @@ strcmp:
 1:
   lbu   a2, 0(a0)
   lbu   a3, 0(a1)
-  add   a0, a0, 1
-  add   a1, a1, 1
+  addi   a0, a0, 1
+  addi   a1, a1, 1
   bne   a2, a3, 2f
   bnez  a2, 1b