1# Bifrost compiler
2
3## Register file
4
5Defined partially in software, partially in hardware.
6
7## Blend shaders
8
9R0 - R3: input (color #0)
10R4 - R7: input (color #1)
11R8 - R15: general purpose
12R48: return address
13
14## Fragment
15
16Anything live during BLEND must respect blend shader registers.
17
18R0 - R3: preloaded (message #0)
19R4 - R7: preloaded (message #1)
20R57 - R63: preloaded (various)
21
22R0 - R15: general purpose (full threads)
23R48 - R63: general purpose (full threads)
24
25R32 - R47: general purpose (half threads, or v6)
26