diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/alpha/lib/strchr.S')
-rw-r--r-- | ANDROID_3.4.5/arch/alpha/lib/strchr.S | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/ANDROID_3.4.5/arch/alpha/lib/strchr.S b/ANDROID_3.4.5/arch/alpha/lib/strchr.S deleted file mode 100644 index 011a175e..00000000 --- a/ANDROID_3.4.5/arch/alpha/lib/strchr.S +++ /dev/null @@ -1,70 +0,0 @@ -/* - * arch/alpha/lib/strchr.S - * Contributed by Richard Henderson (rth@tamu.edu) - * - * Return the address of a given character within a null-terminated - * string, or null if it is not found. - */ - -#include <asm/regdef.h> - - .set noreorder - .set noat - - .align 3 - .globl strchr - .ent strchr -strchr: - .frame sp, 0, ra - .prologue 0 - - zapnot a1, 1, a1 # e0 : zero extend the search character - ldq_u t0, 0(a0) # .. e1 : load first quadword - sll a1, 8, t5 # e0 : replicate the search character - andnot a0, 7, v0 # .. e1 : align our loop pointer - or t5, a1, a1 # e0 : - lda t4, -1 # .. e1 : build garbage mask - sll a1, 16, t5 # e0 : - cmpbge zero, t0, t2 # .. e1 : bits set iff byte == zero - mskqh t4, a0, t4 # e0 : - or t5, a1, a1 # .. e1 : - sll a1, 32, t5 # e0 : - cmpbge zero, t4, t4 # .. e1 : bits set iff byte is garbage - or t5, a1, a1 # e0 : - xor t0, a1, t1 # .. e1 : make bytes == c zero - cmpbge zero, t1, t3 # e0 : bits set iff byte == c - or t2, t3, t0 # e1 : bits set iff char match or zero match - andnot t0, t4, t0 # e0 : clear garbage bits - bne t0, $found # .. e1 (zdb) - -$loop: ldq t0, 8(v0) # e0 : - addq v0, 8, v0 # .. e1 : - nop # e0 : - xor t0, a1, t1 # .. e1 (ev5 data stall) - cmpbge zero, t0, t2 # e0 : bits set iff byte == 0 - cmpbge zero, t1, t3 # .. e1 : bits set iff byte == c - or t2, t3, t0 # e0 : - beq t0, $loop # .. e1 (zdb) - -$found: negq t0, t1 # e0 : clear all but least set bit - and t0, t1, t0 # e1 (stall) - - and t0, t3, t1 # e0 : bit set iff byte was the char - beq t1, $retnull # .. e1 (zdb) - - and t0, 0xf0, t2 # e0 : binary search for that set bit - and t0, 0xcc, t3 # .. e1 : - and t0, 0xaa, t4 # e0 : - cmovne t2, 4, t2 # .. e1 : - cmovne t3, 2, t3 # e0 : - cmovne t4, 1, t4 # .. e1 : - addq t2, t3, t2 # e0 : - addq v0, t4, v0 # .. e1 : - addq v0, t2, v0 # e0 : - ret # .. e1 : - -$retnull: - mov zero, v0 # e0 : - ret # .. e1 : - - .end strchr |