search for: vec4

...es to a temporary, then loads and stores back to the final location was almost 4x slower than the direct version without the temporary). I'm using the clang in the latest XCode + iOS SDK: Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn) Here's a simplified test case: struct vec4 { float data[4]; }; vec4 operator* (vec4& a, vec4& b) { vec4 result; for(int i = 0; i < 4; ++i) result.data[i] = a.data[i] * b.data[i]; return result; } void TestVec4Multiply(vec4& a, vec4& b, vec4& result) { result = a * b; } With -O3 the loop gets vectorized and...

Hi Guys, I have a taget instruction which take a vec4 and returns a vec4.( say instruction “vec4:$dst mod( vec4:$src)" ) And I want to use it to match i an ir instruction/intrinsic function( say " float:$dst llvm.irmod( vec4:$src)" which takes a vec4, output a float. I think the procedure is: when I see the intrinsic llvm.irmo...

Thanks. Yes. Your approach can identify: Glaxy ace S 5830 and S 5830 Glaxy ace But you can not identify using same program: Iphone 4S 16 G Iphone 4S 16G How should I solve both in same time. Kind regards,Tammy [[alternative HTML version deleted]]

Hello, My input language has support for 3 and 4 element vectors but my target only has support for the latter. The language defines vec3 with the same storage space as vec4 so from a backend perspective they are both the same. I'd really like if I could have LLVM treat vec3 as vec4 but I haven't found out how. Currently the target has emulated support for vec3 through LLVM. Loads are already widened by LLVM to a vec4. Stores are kind of funny. By default LLVM...

I'm trying to debug a problem with our custom backend with using a tiered register allocation setup. Just a little background. My target uses vec4 32bit registers and I want to have three levels of registers setup. Each vec4 register can have two sub-regs of size vec2 32bit, and each sub-reg, has its own two sub-regs of 32bit each. So it looks like this, xyzw -> {xy, zw} -> {x, y, z, w}. Now the problem I am having is that for some rea...

...NEON support. Can you please confirm? Thanks, Javier From: James Molloy [mailto:james.molloy at arm.com] Sent: Wednesday, February 29, 2012 2:35 AM To: Martinez, Javier E; llvmdev at cs.uiuc.edu Subject: RE: Expand vector type Hi, * Is there a way to setup LLVM to automatically convert vec3s to vec4s? Yes, if you specify v3i16 and friends as "promote" instead of "legal", llvm will promote it to a v4i16. The ARM NEON backend does this already. I'm surprised you haven't got this happening already as you mention that LLVM widens your loads to 4-element vectors... (thi...

Hi, * Is there a way to setup LLVM to automatically convert vec3s to vec4s? Yes, if you specify v3i16 and friends as "promote" instead of "legal", llvm will promote it to a v4i16. The ARM NEON backend does this already. I'm surprised you haven't got this happening already as you mention that LLVM widens your loads to 4-element vectors. (th...

On Jul 1, 2011, at 12:16 PM, Villmow, Micah wrote: > I'm trying to debug a problem with our custom backend with using a tiered register allocation setup. > > Just a little background. My target uses vec4 32bit registers and I want to have three levels of registers setup. > Each vec4 register can have two sub-regs of size vec2 32bit, and each sub-reg, has its own two sub-regs of 32bit each. > So it looks like this, xyzw -> {xy, zw} -> {x, y, z, w}. > > Now the problem I am having...

...n). All samples shares the same set of constant register values. * general purpose registers - values are not initialized before the execution and destroyed after execution. They can be read and written. * output registers - WRITE-ONLY. Sample program converted to pseudo-LLVM assembly (SSA): %Vec4 = type < 4 x float> // declare input registers and // define constant register values %v1 = dcl %Vec4 xyz %v2 = dcl %Vec4 color %c1 = def %Vec4 <1,2,3,4> // v1, v2, c1 are not allowed to be destination register // of any instruction hereafter. %r1 = add %V...

...T_SUBTYPE_ARB: GL_VERTEX_SHADER_ARB. fixme:d3d_shader:shader_glsl_dump_program_source GL_OBJECT_COMPILE_STATUS_ARB: 1. fixme:d3d_shader:shader_glsl_dump_program_source fixme:d3d_shader:shader_glsl_dump_program_source #version 120 fixme:d3d_shader:shader_glsl_dump_program_source uniform vec4 VC[253]; fixme:d3d_shader:shader_glsl_dump_program_source uniform vec4 posFixup; fixme:d3d_shader:shader_glsl_dump_program_source void order_ps_input(); fixme:d3d_shader:shader_glsl_dump_program_source ivec4 A0; fixme:d3d_shader:shader_glsl_dump_program_source vec4 R0; fixme:d3d_sha...

...1, 2011 2:56 PM To: Villmow, Micah Cc: llvmdev at cs.uiuc.edu Subject: Re: [LLVMdev] (no subject) On Jul 1, 2011, at 12:16 PM, Villmow, Micah wrote: I'm trying to debug a problem with our custom backend with using a tiered register allocation setup. Just a little background. My target uses vec4 32bit registers and I want to have three levels of registers setup. Each vec4 register can have two sub-regs of size vec2 32bit, and each sub-reg, has its own two sub-regs of 32bit each. So it looks like this, xyzw -> {xy, zw} -> {x, y, z, w}. Now the problem I am having is that for some rea...

...ng code I have: struct float4 { float x, y, z, w; }; struct float4x4 { float4 x, y, z, w; }; float4 fetch_vs( float4x4* mat ){ return mat->y; } Caller: // ... float4x4 mat; // Initialized float4 ret = fetch(mat); // fetch is JITed by LLVM float4 ret_vs = fetch_vs(mat) // ... Callee(LLVM): %vec4 = type { float, float, float, float } %mat44 = type { %vec4, %vec4, %vec4, %vec4 } define %vec4 @fetch( %mat44* %m ) { %matval = load %mat44* %m %v2 = extractvalue %mat44 %matval, 2 ret %vec4 %v2 } But if it is implemented by LLVM and called the JIT-ed function in MSVC,...

...mes.molloy at arm.com]<mailto:[mailto:james.molloy at arm.com]> Sent: Wednesday, February 29, 2012 2:35 AM To: Martinez, Javier E; llvmdev at cs.uiuc.edu<mailto:llvmdev at cs.uiuc.edu> Subject: RE: Expand vector type Hi, * Is there a way to setup LLVM to automatically convert vec3s to vec4s? Yes, if you specify v3i16 and friends as "promote" instead of "legal", llvm will promote it to a v4i16. The ARM NEON backend does this already. I'm surprised you haven't got this happening already as you mention that LLVM widens your loads to 4-element vectors... (thi...

...james.molloy at arm.com]> > *Sent:* Wednesday, February 29, 2012 2:35 AM > *To:* Martinez, Javier E; llvmdev at cs.uiuc.edu <mailto:llvmdev at cs.uiuc.edu> > *Subject:* RE: Expand vector type > > Hi, > > * *Is there a way to setup LLVM to automatically convert vec3s to vec4s? * > > ** > > Yes, if you specify v3i16 and friends as “promote” instead of “legal”, llvm will > promote it to a v4i16. The ARM NEON backend does this already. I’m surprised you > haven’t got this happening already as you mention that LLVM widens your loads to > 4-element vect...

OpenGL shading language (GLSL) is like a C subset language, but it contains some special features, ex: native vector type & swizzle. In GLSL, you can declare vector types: void main() { vec4 a; vec3 b; vec2 c; } You can access the element of vector by using .xyzw, it means the 1st, 2nd, 3rd, 4th element of the vector are x, y, z, w. Ex: void main() { float f; vec4 a = vec4(1.0, 2.0, 3.0, 4.0); vec4 b = vec4(3.0, 4.0, 5.0, 6.0); v4.xyw = vec2(2.5, 3.3. 7.7); f = v4.y;...

...ized shufflevector would remove the need for > insertelement and extractelement to exist completely. You should look into how this works with clang. Clang allows you to do things like this, for example: typedef __attribute__(( ext_vector_type(4) )) float float4; float2 vec2, vec2_2; float4 vec4, vec4_2; float f; void test2() { vec2 = vec4.xy; // shorten f = vec2.x; // extract elt vec4 = vec4.yyyy; // splat vec4.zw = vec2; // insert } etc. It also offers operators to extract all the even or odd elements of a vector, do arbitrary two-input-vector shuffles...

...<4 x float>> > where each predicate bit masks out a whole short vector. We're using this extension to vectorize graphics code where where variables in the pre-vectorization code are short vectors. > So, vectorizing code like: > for(int i = 0; i < 1000; i++) > { > vec4 color = colors[i]; > vec3 normal = normals[i]; > color.rgb *= fmax(0.0, dot(normal, light_dir)); > colors[i] = color; > } > > I'm planning on passing already vectorized code into LLVM and using LLVM as a backend for optimization and JIT code generation. > > D...

On Sat, 23 Jul 2005, Tzu-Chien Chiu wrote: > 2005/7/23, Chris Lattner <sabre at nondot.org>: >> What does a 'read only' register mean? Is it a constant (e.g. returns >> 1.0)? Otherwise, how can it be a useful value? > > Yes, it's a constant register. > > Because the instruction cannot contain an immediate value, a constant > value may be stored in

2005/7/23, Chris Lattner <sabre at nondot.org>: > > What does a 'read only' register mean? Is it a constant (e.g. returns > 1.0)? Otherwise, how can it be a useful value? Yes, it's a constant register. Because the instruction cannot contain an immediate value, a constant value may be stored in a constant register, and it's defined _before_ the program starts by

...like to make sure that the code generator is actually capable of generating instructions with exactly those semantics. Right now vector operations utilizing swizzling and write masks in LLVM IR have to expressed with series of load/extractelement/instertelement/store constructs. As in vec2 = vec4.xy would end up being: %tmp = load <4 x float>* @vec4 %tmp1 = extractelement <4 x float> %tmp, i32 0 %tmp2 = insertelement <2 x float> undef, float %tmp1, i32 0 %tmp3 = extractelement <4 x float> %tmp, i32 1 %tmp4 = insertelement <2 x float> %tmp2, float %tmp3, i32 1...