diff options
| author | Bond_009 <bond.009@outlook.com> | 2020-12-22 00:27:40 +0100 |
|---|---|---|
| committer | Bond_009 <bond.009@outlook.com> | 2020-12-22 00:27:40 +0100 |
| commit | 1e0092d454d4243da23d421b35a02a5d80ec9d30 (patch) | |
| tree | a475350f65d4ffb12e5f892d3ac3a4a3578bc5c4 | |
| parent | 48c6bd9e5263b7b3953e48afe6c5928514787a0f (diff) | |
Improve assembly day 5
| -rw-r--r-- | 5/part2_fast.c | 4 | ||||
| -rw-r--r-- | 5/seat_id.asm | 20 | ||||
| -rw-r--r-- | 5/seat_id_sse3.asm | 11 |
3 files changed, 19 insertions, 16 deletions
diff --git a/5/part2_fast.c b/5/part2_fast.c index 2334390..483dd8f 100644 --- a/5/part2_fast.c +++ b/5/part2_fast.c @@ -27,6 +27,9 @@ int column(const char *seat) return end_res; } +#ifdef USE_ASM +int seat_id(const char *seat); +#else int seat_id(const char *seat) { int end_res = 0; @@ -45,6 +48,7 @@ int seat_id(const char *seat) return end_res; } +#endif int missing_seat_id(const char *filename) { diff --git a/5/seat_id.asm b/5/seat_id.asm index 562dec4..c9ca8b8 100644 --- a/5/seat_id.asm +++ b/5/seat_id.asm @@ -6,43 +6,43 @@ section .text seat_id: xor eax, eax ; set up return value - cmp BYTE [rdi], 66 ; B + cmp BYTE [rdi], 'B' sete al shl eax, 1 xor ecx, ecx - cmp BYTE [rdi + 1], 66 + cmp BYTE [rdi + 1], 'B' sete cl or eax, ecx shl eax, 1 - cmp BYTE [rdi + 2], 66 + cmp BYTE [rdi + 2], 'B' sete cl or eax, ecx shl eax, 1 - cmp BYTE [rdi + 3], 66 + cmp BYTE [rdi + 3], 'B' sete cl or eax, ecx shl eax, 1 - cmp BYTE [rdi + 4], 66 + cmp BYTE [rdi + 4], 'B' sete cl or eax, ecx shl eax, 1 - cmp BYTE [rdi + 5], 66 + cmp BYTE [rdi + 5], 'B' sete cl or eax, ecx shl eax, 1 - cmp BYTE [rdi + 6], 66 + cmp BYTE [rdi + 6], 'B' sete cl or eax, ecx shl eax, 1 - cmp BYTE [rdi + 7], 82 ; R + cmp BYTE [rdi + 7], 'R' sete cl or eax, ecx shl eax, 1 - cmp BYTE [rdi + 8], 82 + cmp BYTE [rdi + 8], 'R' sete cl or eax, ecx shl eax, 1 - cmp BYTE [rdi + 9], 82 + cmp BYTE [rdi + 9], 'R' sete cl or eax, ecx ret diff --git a/5/seat_id_sse3.asm b/5/seat_id_sse3.asm index 40127bf..9ea9720 100644 --- a/5/seat_id_sse3.asm +++ b/5/seat_id_sse3.asm @@ -1,25 +1,24 @@ -global seat_id_sse3 +global seat_id section .data align 16 - xmm_cmp: db 1, 'RBBBBBBB', 1, 1, 1, 1, 1, 1, 1 xmm_shuf: db 8, 7, 6, 5, 4, 3, 2, 1, 0, 9, 10, 11, 12, 13, 14, 15 - + xmm_cmp: db 1, 'RBBBBBBB', 1, 1, 1, 1, 1, 1, 1 section .text -seat_id_sse3: +seat_id: xor eax, eax ; set up return value movq xmm0, qword [rdi] ; load first 8 bytes pshufb xmm0, [rel xmm_shuf] ; reverse byte order and already shift left once pcmpeqb xmm0, [rel xmm_cmp] pmovmskb eax, xmm0 ; store mask in return value xor ecx, ecx - cmp BYTE [rdi + 8], 'R' + cmp byte [rdi + 8], 'R' sete cl or eax, ecx shl eax, 1 - cmp BYTE [rdi + 9], 'R' + cmp byte [rdi + 9], 'R' sete cl or eax, ecx ret |