diff options
| author | Francis Laniel <francis.laniel@amarulasolutions.com> | 2023-04-01 22:54:39 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2023-04-06 19:10:08 -0400 |
| commit | 5ffcf7c59065477865a542159a9bcddf0929c36e (patch) | |
| tree | 2cfef1318dc81a888d2d3e2d28e64738ffb4c983 /arch/arm/lib/lib1funcs.S | |
| parent | 16abdd42b390d9a49825e70b52eb7ae42013dae5 (diff) | |
arm: lib: add __gnu_thumb1_case_si
The assembly for __gnu_thumb1_case_si was taken from upstream gcc and adapted
as width suffix was removed for the add instruction [1].
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Tested-by: Tony Dinh <mibodhi@gmail.com>
[1] https://github.com/gcc-mirror/gcc/blob/4f181f9c7ee3efc509d185fdfda33be9018f1611/libgcc/config/arm/lib1funcs.S#L2156
Acked-by: Pali Rohár <pali@kernel.org>
Acked-by: Tony Dinh <mibodhi@gmail.com>
Diffstat (limited to 'arch/arm/lib/lib1funcs.S')
| -rw-r--r-- | arch/arm/lib/lib1funcs.S | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/lib/lib1funcs.S b/arch/arm/lib/lib1funcs.S index de15d09e36..a1f44d9454 100644 --- a/arch/arm/lib/lib1funcs.S +++ b/arch/arm/lib/lib1funcs.S @@ -419,4 +419,21 @@ ENTRY(__gnu_thumb1_case_uhi) ret lr ENDPROC(__gnu_thumb1_case_uhi) .popsection + +/* Taken and adapted from: https://github.com/gcc-mirror/gcc/blob/4f181f9c7ee3efc509d185fdfda33be9018f1611/libgcc/config/arm/lib1funcs.S#L2156 */ +.pushsection .text.__gnu_thumb1_case_si, "ax" +ENTRY(__gnu_thumb1_case_si) + push {r0, r1} + mov r1, lr + adds r1, r1, #2 /* Align to word. */ + lsrs r1, r1, #2 + lsls r0, r0, #2 + lsls r1, r1, #2 + ldr r0, [r1, r0] + adds r0, r0, r1 + mov lr, r0 + pop {r0, r1} + mov pc, lr /* We know we were called from thumb code. */ +ENDPROC(__gnu_thumb1_case_si) +.popsection #endif |