diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2019-05-10 07:48:14 -0700 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2019-05-13 09:11:01 +0200 |
| commit | b56bd489812c685819bdec6d83f7990f21473be8 (patch) | |
| tree | e6baa632fd87a5a6ab464e64e3b53a4b13673d5c /libc/string/xtensa | |
| parent | 30b85d43a7657eeac02462e8d84946358a5aa647 (diff) | |
xtensa: don't use l32r opcode explicitly
xtensa assembler is capable of representing register loads with either
movi + addmi, l32r or const16, depending on the core configuration.
Don't use '.literal' and 'l32r' directly in the code, use 'movi' and let
the assembler relax them.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'libc/string/xtensa')
| -rw-r--r-- | libc/string/xtensa/strcmp.S | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/libc/string/xtensa/strcmp.S b/libc/string/xtensa/strcmp.S index a16da5da2..a106bee67 100644 --- a/libc/string/xtensa/strcmp.S +++ b/libc/string/xtensa/strcmp.S @@ -37,11 +37,6 @@ .text .align 4 .literal_position - .literal .Lmask0, MASK0 - .literal .Lmask1, MASK1 - .literal .Lmask2, MASK2 - .literal .Lmask3, MASK3 - .literal .Lmask4, MASK4 ENTRY (strcmp) /* a2 = s1, a3 = s2 */ @@ -130,10 +125,9 @@ ENTRY (strcmp) .align 4 #if XCHAL_HAVE_LOOPS .Laligned: - .begin no-transform movi a11, 0 - l32r a4, .Lmask0 /* mask for byte 0 */ - l32r a7, .Lmask4 + movi a4, MASK0 /* mask for byte 0 */ + movi a7, MASK4 loop a11, .Laligned_done /* Loop forever. */ /* First unrolled loop body. */ @@ -184,10 +178,10 @@ ENTRY (strcmp) If not, loop over the rest of string using normal algorithm. */ bnone a8, a4, .Leq /* if byte 0 is zero */ - l32r a5, .Lmask1 /* mask for byte 1 */ - l32r a6, .Lmask2 /* mask for byte 2 */ + movi a5, MASK1 /* mask for byte 1 */ + movi a6, MASK2 /* mask for byte 2 */ bnone a8, a5, .Leq /* if byte 1 is zero */ - l32r a7, .Lmask3 /* mask for byte 3 */ + movi a7, MASK3 /* mask for byte 3 */ bnone a8, a6, .Leq /* if byte 2 is zero */ bnone a8, a7, .Leq /* if byte 3 is zero */ addi.n a2, a2, 4 /* advance s1 pointer */ @@ -196,7 +190,6 @@ ENTRY (strcmp) /* align (1 mod 4) */ loop a11, .Leq /* loop forever */ - .end no-transform l32i a8, a2, 0 /* get word from s1 */ l32i a9, a3, 0 /* get word from s2 */ |