sparc/gen/ascii_strcasecmp.s

86  * used for finding null bytes in a word:
88  * #define has_null(word) ((word - 0x01010101) & (~word & 0x80808080))
119 	! a word boundary. During these steps, the bytes are translated to
130 	andcc	%i0, 3, %i3		! s1 word-aligned ?
195 	andcc	%i1, 3, %i3		! s2 word-aligned ?
199 	! enough to have a word aligned desintation
207 	andcc	%i1, 3, %i3		! s2 word aligned ?
212 	bz	.word4			! yup, s2 word-aligned
217 	andn	%i1, 3, %i1		! round s1 pointer down to next word
220 	lduw	[%i1], %i0		! new lower word from s2
222 	sll	%i0, %l6, %g1		! partial unaligned word from s2
228 	! word aligned, if it is, we use word4 & cmp4
231 	andn	%i4, %i0, %l4		! ~word & 0x80808080
232 	sub	%i0, %i5, %l5		! word - 0x01010101
233 	andcc	%l5, %l4, %g0		! (word - 0x01010101) & ~word & 0x80808080
234 	bz,a	.doload			! null byte in previous aligned s2 word
235 	lduw	[%i1 + 4], %i0		! load next aligned word from s2
237 	srl	%i0, %l7, %i3		! byte(s) from new aligned word from s2
238 	or	%g1, %i3, %g1		! merge to get unaligned word from s2
239 	lduw	[%i1 + %i2], %i3	! x1 = word from s1
254 	add	%l0, %i3, %i3		! lowercase word from s1
255 	add	%l4, %g1, %g1		! lowercase word from s2
259 	andn	%i4, %i3, %l4		! ~word & 0x80808080
260 	sub	%i3, %i5, %l5		! word - 0x01010101
261 	andcc	%l5, %l4, %g0		! (word - 0x01010101) & ~word & 0x80808080
263 	sll	%i0, %l6, %g1		! bytes from old aligned word from s2
272 	! we have a word aligned source and destination!  This means
276 	lduw	[%i1 + %i2], %i3	! x1 = word from s1
280 	lduw	[%i1], %g1		! x2 = word from s2
294 	add	%l0, %i3, %i3		! lowercase word from s1
295 	add	%l4, %g1, %g1		! lowercase word from s2
299 	andn	%i4, %i3, %l4		! ~word & 0x80808080
300 	sub	%i3, %i5, %l5		! word - 0x01010101
301 	andcc	%l5, %l4, %g0		! (word - 0x01010101) & ~word & 0x80808080
303 	lduw	[%i1 + %i2], %i3	! load word from s1
312 	srl	%g1, 24, %i2		! first byte of mismatching word in s2
313 	srl	%i3, 24, %i1		! first byte of mismatching word in s1
316 	srl	%g1, 16, %i2		! second byte of mismatching word in s2
322 	srl	%i3, 16, %i1		! second byte of mismatching word in s1
325 	srl	%g1, 8, %i2		! third byte of mismatching word in s2
331 	srl	%i3, 8, %i1		! third byte of mismatching word in s1