GSoC/kolibrios-nvme-driver
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Code Issues 2 Actions Activity

slight perf improvement in alloc_dptr

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This commit is contained in:
Abdur-Rahman Mansoor
2024-08-26 17:24:46 -04:00
parent 3d95901b65
commit 388eca270e
1 changed files with 4 additions and 4 deletions
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8
drivers/nvme/nvme.asm
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@@ -411,16 +411,16 @@ proc alloc_dptr stdcall, ns:dword, prps_ptr:dword, numsectors:dword, prp_list_pt
.build_prp_list:
mov ebx, ecx
mov ecx, eax
and ebx, not (PAGE_SIZE - 1)
add ebx, PAGE_SIZE
mov eax, [numsectors]
mov eax, edx
xor edx, edx
div ecx
test [buf], PAGE_SIZE - 1
test ebx, PAGE_SIZE - 1
jz @f
inc eax
@@:
and ebx, not (PAGE_SIZE - 1)
add ebx, PAGE_SIZE
stdcall build_prp_list, eax, ebx, [prp_list_ptr]
test eax, eax
jz .err