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lcnt -> aL

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fincs 2017-12-27 18:43:54 +01:00
parent 625b28e36a
commit 97814558db
2 changed files with 3 additions and 3 deletions
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4
Manual.md
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@ -51,9 +51,9 @@ Registers may also be assigned additional names in order to make the code more l
For convenience, registers may be addressed using an offset from a known register. This is called indexing. For example, `c8[4]` is equivalent to `c12`; and `r4[-2]` is equivalent to `r2`. Indexing is useful for addressing arrays of registers (such as matrices). For convenience, registers may be addressed using an offset from a known register. This is called indexing. For example, `c8[4]` is equivalent to `c12`; and `r4[-2]` is equivalent to `r2`. Indexing is useful for addressing arrays of registers (such as matrices).
Some source operands of instructions (called SRC1) support relative addressing. This means that it is possible to use one of the three built-in indexing registers (`a0.x`, `a0.y` and `lcnt`) to address a register, e.g. `someArray[lcnt]`. Adding an offset is also supported, e.g. `someArray[lcnt+2]`. This is useful in FOR loops. Index registers can only be used with floating-point vector uniform registers, though. Note: Older versions of `picasso` called these registers `a0`, `a1` and `a2`; these names are still accepted for backwards compatibility. Some source operands of instructions (called SRC1) support relative addressing. This means that it is possible to use one of the three built-in indexing registers (`a0.x`, `a0.y` and `aL`) to address a register, e.g. `someArray[aL]`. Adding an offset is also supported, e.g. `someArray[aL+2]`. This is useful in FOR loops. Index registers can only be used with floating-point vector uniform registers, though. Note: Older versions of `picasso` called the indexing registers `a0`, `a1` and `a2` respectively (also `lcnt` for `a2`); these names are still accepted for backwards compatibility.
Normal floating-point vector registers may also be negated by prepending a minus sign before it, e.g. `-r2` or `-someArray[lcnt+2]`. Normal floating-point vector registers may also be negated by prepending a minus sign before it, e.g. `-r2` or `-someArray[aL+2]`.
In geometry shaders, `b15` is automatically set to true *after* each execution of the geometry shader. This can be useful to detect whether program state should be initialized - GPU management code usually resets all unused boolean uniforms to false when setting up the PICA200's shader processing units. In geometry shaders, `b15` is automatically set to true *after* each execution of the geometry shader. This can be useful to detect whether program state should be initialized - GPU management code usually resets all unused boolean uniforms to false when setting up the PICA200's shader processing units.

2
source/picasso_assembler.cpp
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@ -661,7 +661,7 @@ static inline int convertIdxRegName(const char* reg)
{ {
if (stricmp(reg, "a0")==0 || stricmp(reg, "a0.x")==0) return 1; if (stricmp(reg, "a0")==0 || stricmp(reg, "a0.x")==0) return 1;
if (stricmp(reg, "a1")==0 || stricmp(reg, "a0.y")==0) return 2; if (stricmp(reg, "a1")==0 || stricmp(reg, "a0.y")==0) return 2;
if (stricmp(reg, "a2")==0 || stricmp(reg, "lcnt")==0) return 3; if (stricmp(reg, "a2")==0 || stricmp(reg, "lcnt")==0 || stricmp(reg, "aL")==0) return 3;
return 0; return 0;
} }