diff options
Diffstat (limited to 'libc/string/xtensa/strcpy.S')
| -rw-r--r-- | libc/string/xtensa/strcpy.S | 72 |
1 files changed, 36 insertions, 36 deletions
diff --git a/libc/string/xtensa/strcpy.S b/libc/string/xtensa/strcpy.S index 108070384..dc0a15175 100644 --- a/libc/string/xtensa/strcpy.S +++ b/libc/string/xtensa/strcpy.S @@ -36,7 +36,7 @@ ENTRY (strcpy) /* a2 = dst, a3 = src */ - mov a10, a2 // leave dst in return value register + mov a10, a2 /* leave dst in return value register */ movi a4, MASK0 movi a5, MASK1 movi a6, MASK2 @@ -51,23 +51,23 @@ ENTRY (strcpy) j .Ldstunaligned -.Lsrc1mod2: // src address is odd - l8ui a8, a3, 0 // get byte 0 - addi a3, a3, 1 // advance src pointer - s8i a8, a10, 0 // store byte 0 - beqz a8, 1f // if byte 0 is zero - addi a10, a10, 1 // advance dst pointer - bbci.l a3, 1, .Lsrcaligned // if src is now word-aligned +.Lsrc1mod2: /* src address is odd */ + l8ui a8, a3, 0 /* get byte 0 */ + addi a3, a3, 1 /* advance src pointer */ + s8i a8, a10, 0 /* store byte 0 */ + beqz a8, 1f /* if byte 0 is zero */ + addi a10, a10, 1 /* advance dst pointer */ + bbci.l a3, 1, .Lsrcaligned /* if src is now word-aligned */ -.Lsrc2mod4: // src address is 2 mod 4 - l8ui a8, a3, 0 // get byte 0 +.Lsrc2mod4: /* src address is 2 mod 4 */ + l8ui a8, a3, 0 /* get byte 0 */ /* 1-cycle interlock */ - s8i a8, a10, 0 // store byte 0 - beqz a8, 1f // if byte 0 is zero - l8ui a8, a3, 1 // get byte 0 - addi a3, a3, 2 // advance src pointer - s8i a8, a10, 1 // store byte 0 - addi a10, a10, 2 // advance dst pointer + s8i a8, a10, 0 /* store byte 0 */ + beqz a8, 1f /* if byte 0 is zero */ + l8ui a8, a3, 1 /* get byte 0 */ + addi a3, a3, 2 /* advance src pointer */ + s8i a8, a10, 1 /* store byte 0 */ + addi a10, a10, 2 /* advance dst pointer */ bnez a8, .Lsrcaligned 1: retw @@ -78,28 +78,28 @@ ENTRY (strcpy) #if XCHAL_HAVE_LOOPS /* (2 mod 4) alignment for loop instruction */ .Laligned: - _movi.n a8, 0 // set up for the maximum loop count - loop a8, .Lz3 // loop forever (almost anyway) - l32i a8, a3, 0 // get word from src - addi a3, a3, 4 // advance src pointer - bnone a8, a4, .Lz0 // if byte 0 is zero - bnone a8, a5, .Lz1 // if byte 1 is zero - bnone a8, a6, .Lz2 // if byte 2 is zero - s32i a8, a10, 0 // store word to dst - bnone a8, a7, .Lz3 // if byte 3 is zero - addi a10, a10, 4 // advance dst pointer + _movi.n a8, 0 /* set up for the maximum loop count */ + loop a8, .Lz3 /* loop forever (almost anyway) */ + l32i a8, a3, 0 /* get word from src */ + addi a3, a3, 4 /* advance src pointer */ + bnone a8, a4, .Lz0 /* if byte 0 is zero */ + bnone a8, a5, .Lz1 /* if byte 1 is zero */ + bnone a8, a6, .Lz2 /* if byte 2 is zero */ + s32i a8, a10, 0 /* store word to dst */ + bnone a8, a7, .Lz3 /* if byte 3 is zero */ + addi a10, a10, 4 /* advance dst pointer */ #else /* !XCHAL_HAVE_LOOPS */ -1: addi a10, a10, 4 // advance dst pointer +1: addi a10, a10, 4 /* advance dst pointer */ .Laligned: - l32i a8, a3, 0 // get word from src - addi a3, a3, 4 // advance src pointer - bnone a8, a4, .Lz0 // if byte 0 is zero - bnone a8, a5, .Lz1 // if byte 1 is zero - bnone a8, a6, .Lz2 // if byte 2 is zero - s32i a8, a10, 0 // store word to dst - bany a8, a7, 1b // if byte 3 is zero + l32i a8, a3, 0 /* get word from src */ + addi a3, a3, 4 /* advance src pointer */ + bnone a8, a4, .Lz0 /* if byte 0 is zero */ + bnone a8, a5, .Lz1 /* if byte 1 is zero */ + bnone a8, a6, .Lz2 /* if byte 2 is zero */ + s32i a8, a10, 0 /* store word to dst */ + bany a8, a7, 1b /* if byte 3 is zero */ #endif /* !XCHAL_HAVE_LOOPS */ .Lz3: /* Byte 3 is zero. */ @@ -133,8 +133,8 @@ ENTRY (strcpy) .Ldstunaligned: #if XCHAL_HAVE_LOOPS - _movi.n a8, 0 // set up for the maximum loop count - loop a8, 2f // loop forever (almost anyway) + _movi.n a8, 0 /* set up for the maximum loop count */ + loop a8, 2f /* loop forever (almost anyway) */ #endif 1: l8ui a8, a3, 0 addi a3, a3, 1 |