1Overview 2======== 3 4Computerator is a tool to launch compute shaders, written in assembly. 5The main purpose is to have an easy way to experiment with instructions 6without dealing with the entire compiler stack (which makes controlling 7the order of instructions, the registers chosen, etc, difficult). The 8choice of compute shaders is simply because there is far less state 9setup required. 10 11Headers 12------- 13 14The shader assembly can be prefixed with headers to control state setup: 15 16* ``@localsize X, Y, Z`` - configures local workgroup size 17* ``@buf SZ`` - configures an SSBO of the specified size (in dwords). 18 The order of the ``@buf`` headers determines the index, ie the first 19 ``@buf`` header is ``g[0]``, the second ``g[1]``, and so on 20* ``@const(cN.c)`` configures a const vec4 starting at specified 21 const register, ie ``@const(c1.x) 1.0, 2.0, 3.0, 4.0`` will populate 22 ``c1.xyzw`` with ``vec4(1.0, 2.0, 3.0, 4.0)`` 23* ``@invocationid(rN.c)`` will populate a vec3 starting at the specified 24 register with the local invocation-id 25* ``@wgid(rN.c)`` will populate a vec3 starting at the specified register 26 with the workgroup-id (must be a high-reg, ie. ``r48.x`` and above) 27* ``@numwg(cN.c)`` will populate a vec3 starting at the specified const 28 register 29 30Example 31------- 32 33``` 34@localsize 32, 1, 1 35@buf 32 ; g[0] 36@const(c0.x) 0.0, 0.0, 0.0, 0.0 37@const(c1.x) 1.0, 2.0, 3.0, 4.0 38@wgid(r48.x) ; r48.xyz 39@invocationid(r0.x) ; r0.xyz 40@numwg(c2.x) ; c2.xyz 41mov.u32u32 r0.y, r0.x 42(rpt5)nop 43stib.untyped.1d.u32.1 g[0] + r0.y, r0.x 44end 45nop 46``` 47 48Usage 49----- 50 51``` 52cat myshader.asm | ./computerator --disasm --groups=4,4,4 53``` 54 55