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- .\" $Header$
- .TH VC4_AS 1
- .ad
- .SH NAME
- vc4_as \- assembler for Broadcom VideoCore IV
- .SH SYNOPSIS
- /usr/em/lib/vc4_as [options] argument ...
- .SH DESCRIPTION
- This assembler is made with the general framework
- described in \fIuni_ass\fP(6).
- .SH SYNTAX
- The assembler uses a modified version of the syntax described in
- https://github.com/hermanhermitage/videocoreiv/wiki/VideoCore-IV-Programmers-Manual:
- condition codes must be prefixed with a full stop. Vector instructions are not
- yet supported.
- .SH "SEE ALSO"
- uni_ass(6),
- ack(1),
- .br
- https://github.com/hermanhermitage/videocoreiv
- .SH EXAMPLE
- .nf
- .ta 8n 16n 24n 32n 40n 48n
- An example of VideoCore IV assembly language:
- ldb r0, __uart_status
- b.eq r0, #0, 1b
- ! receive 1 byte (returned in r0)
- mov r1, #AUX_MU_LSR_REG
- mov r2, #AUX_MU_IO_REG
- ! loop until char available
- recvwait:
- ld r3, (r1)
- and r3, #0x1
- b.ne r3, #0x1, recvwait
- ldb r0, (r2)
- 1:
- b lr
- .fi
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