substitute
substitute
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CC#
Created by Yasaki Kondo on 8/5/2024 in #help
How to click on link?
(they could also just reimplement the LinkText locator for p, which is basically the above^)
9 replies
CC#
Created by Yasaki Kondo on 8/5/2024 in #help
How to click on link?
or by using the FindElements on p and grabbing the one with the exact text.
9 replies
CC#
Created by Yasaki Kondo on 8/5/2024 in #help
How to click on link?
/html/body/div/div/div[1]/div[2]/div/div[2]/div[1]/div[1]/button/p
/html/body/div/div/div[1]/div[2]/div/div[2]/div[1]/div[1]/button/p
9 replies
CC#
Created by Yasaki Kondo on 8/5/2024 in #help
How to click on link?
xpath is probably best here
9 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
I may be able to avoid a copy for already big endian systems if I am able to add extension methods for COM imports (it’s a COM class)
76 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
further cleanup can still happen once I've tested it.
76 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
still need to test it but should work.
76 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
otherwise I just pipe it directly in
76 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
so I create a copy if I need to reverse the endianness and send that in as byte[] (to avoid another copy)
76 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
            public void WriteFloats(uint address, Span<float> values)
            {
                if (BitConverter.IsLittleEndian)
                {
                    var memory = new byte[values.Length * sizeof(float)];
                    BinaryPrimitives.ReverseEndianness(
                        MemoryMarshal.Cast<float, int>(values),
                        MemoryMarshal.Cast<byte, int>(memory));
                    SetMemory(address, memory, out _);
                    return;
                }
                SetMemory(address, MemoryMarshal.Cast<float, byte>(values), out _);
            }
            public void WriteFloats(uint address, Span<float> values)
            {
                if (BitConverter.IsLittleEndian)
                {
                    var memory = new byte[values.Length * sizeof(float)];
                    BinaryPrimitives.ReverseEndianness(
                        MemoryMarshal.Cast<float, int>(values),
                        MemoryMarshal.Cast<byte, int>(memory));
                    SetMemory(address, memory, out _);
                    return;
                }
                SetMemory(address, MemoryMarshal.Cast<float, byte>(values), out _);
            }
There is a method to reverse the endianness of N values from a span.
76 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
for many values I ended up adding an overload for taking a byte[] directly
76 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
probably
76 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
from Godbolt on .Net 8, interesting.
76 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
stackalloc 
Program:<<Main>$>g__WriteFloat2|0_2(uint,float) (FullOpts):
G_M4409_IG01:  ;; offset=0x0000
       sub      rsp, 24
       vzeroupper 
       xor      eax, eax
       mov      qword ptr [rsp+0x08], rax
       mov      qword ptr [rsp+0x10], 0xCBAE90
G_M4409_IG02:  ;; offset=0x0017
       lea      rax, [rsp+0x08]
       vmovd    ecx, xmm0
       bswap    ecx
       mov      dword ptr [rax], ecx
       cmp      qword ptr [rsp+0x10], 0xCBAE90
       je       SHORT G_M4409_IG03
       call     CORINFO_HELP_FAIL_FAST
G_M4409_IG03:  ;; offset=0x0034
       nop      
G_M4409_IG04:  ;; offset=0x0035
       add      rsp, 24
       ret     
Program:<<Main>$>g__WriteFloat2|0_2(uint,float) (FullOpts):
G_M4409_IG01:  ;; offset=0x0000
       sub      rsp, 24
       vzeroupper 
       xor      eax, eax
       mov      qword ptr [rsp+0x08], rax
       mov      qword ptr [rsp+0x10], 0xCBAE90
G_M4409_IG02:  ;; offset=0x0017
       lea      rax, [rsp+0x08]
       vmovd    ecx, xmm0
       bswap    ecx
       mov      dword ptr [rax], ecx
       cmp      qword ptr [rsp+0x10], 0xCBAE90
       je       SHORT G_M4409_IG03
       call     CORINFO_HELP_FAIL_FAST
G_M4409_IG03:  ;; offset=0x0034
       nop      
G_M4409_IG04:  ;; offset=0x0035
       add      rsp, 24
       ret
re-use existing heap 
Program:<<Main>$>g__WriteFloat|0_1(uint,float) (FullOpts):
G_M5640_IG01:  ;; offset=0x0000
       push     rbp
       sub      rsp, 16
       vzeroupper 
       lea      rbp, [rsp+0x10]
       vmovss   dword ptr [rbp-0x04], xmm0
G_M5640_IG02:  ;; offset=0x0012
       lea      rdi, bword ptr [rbp-0x04]
       mov      eax, 4
       vmovss   xmm0, dword ptr [rbp-0x04]
       vmovd    ecx, xmm0
       bswap    ecx
       cmp      eax, 4
       jb       SHORT G_M5640_IG05
       mov      dword ptr [rdi], ecx
G_M5640_IG03:  ;; offset=0x002D
       add      rsp, 16
       pop      rbp
       ret      
G_M5640_IG04:  ;; offset=0x0033
       call     CORINFO_HELP_OVERFLOW
G_M5640_IG05:  ;; offset=0x0038
       mov      edi, 40
       call     [System.ThrowHelper:ThrowArgumentOutOfRangeException(int)]
       int3    
Program:<<Main>$>g__WriteFloat|0_1(uint,float) (FullOpts):
G_M5640_IG01:  ;; offset=0x0000
       push     rbp
       sub      rsp, 16
       vzeroupper 
       lea      rbp, [rsp+0x10]
       vmovss   dword ptr [rbp-0x04], xmm0
G_M5640_IG02:  ;; offset=0x0012
       lea      rdi, bword ptr [rbp-0x04]
       mov      eax, 4
       vmovss   xmm0, dword ptr [rbp-0x04]
       vmovd    ecx, xmm0
       bswap    ecx
       cmp      eax, 4
       jb       SHORT G_M5640_IG05
       mov      dword ptr [rdi], ecx
G_M5640_IG03:  ;; offset=0x002D
       add      rsp, 16
       pop      rbp
       ret      
G_M5640_IG04:  ;; offset=0x0033
       call     CORINFO_HELP_OVERFLOW
G_M5640_IG05:  ;; offset=0x0038
       mov      edi, 40
       call     [System.ThrowHelper:ThrowArgumentOutOfRangeException(int)]
       int3
76 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
I use them for C++ stuff
76 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
Huh, I didn’t know gb supported C#
76 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
(One just reuses the arg while the other uses new stack)
76 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
It is additionally interesting as they’re doing the same thing (writing to some stack memory); Time to dive into the rabbit hole.
76 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
Interesting results
76 replies
CC#
Created by substitute on 7/31/2024 in #help
new Span vs stackalloc
@Kouhai Compiled both on sharplabs, the reinterpret cast is fewer instructions in the JIT assembly in debug, but the stack alloc is fewer instructions in release
76 replies