[raspi-internals] Re: QPU Tutorials/Samples
- From: Shachar Raindel <shacharr@xxxxxxxxx>
- To: raspi-internals <raspi-internals@xxxxxxxxxxxxx>
- Date: Sun, 16 Feb 2014 07:15:04 +0200
On Sun, Feb 16, 2014 at 7:10 AM, Herman Hermitage <
hermanhermitage@xxxxxxxxxxx> wrote:
> Ok,
>
> I've added support for constant 2-bit vectors and rotator on the mul
> sources:
>
> /* Assembled Program */
> /* 0x00000000: */ 0x00000000, 0xe6020827, /* ldi r0,
> [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0] */
> /* 0x00000008: */ 0x00001111, 0xe6020827, /* ldi r0,
> [1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0] */
> /* 0x00000010: */ 0x0000ffff, 0xe6020827, /* ldi r0,
> [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1] */
> /* 0x00000018: */ 0xffff0000, 0xe6020827, /* ldi r0,
> [2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2] */
> /* 0x00000020: */ 0xedb65b6d, 0xe6020827, /* ldi r0,
> [1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,2] */
> /* 0x00000028: */ 0x00030000, 0xe2020827, /* ldi r0, [-2, -2, 0, 0,
> 0,0,0,0,0,0,0,0,0,0,0,0] */
> /* 0x00000030: */ 0x809f4009, 0xd00049e0, /* nop; mov r0, r1>> 4 */
> /* 0x00000038: */ 0x809f0009, 0xd00049e0, /* nop; mov r0, r1>> r5 */
>
Coolness. Do we now get 0 diff when reassembling the shader_256.s code?
>
> I also added some support for /* */ and // comments.
>
> If a line starts with:
> /* addr: word0 word1 */
> then the assembler also verifies that the assembled version has the same
> word values.
>
> Syntax wise I think I should support:
> ldi r0/r1, 0x12345678
> bra r0/r1, target
>
> As i think both ldi and bra/r can write to two registers at once. I think
> / works better than , or ; as they lead to issues with the slots or args -
> who knows I'll see what drops out.
>
Regarding separators - my emacs really don't like ";" inside an assembly
opcode. Maybe using "|" or "$" to separate the subcommands will be better?
In classical MASM, ";" is the mark for a comment.
Thanks,
--Shachar
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