aud_regs.h
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#ifndef _aud_regs_h_
#define _aud_regs_h_ 1
############################################################################
#
# Scalar Register Usage Conventions:
#
# Starting from $31 growing down, we allocate 'permanent' registers.
# These should only be re-used carefully, possibly saved/restored.
# (during development we might re-shuffle these so the more crucial
# or stable ones remain higher)
#
# Register $0 is always 0, as per the MIPS R4000 spec.
#
# Starting from $1 growing up, we use 'temporary' registers which
# are free to be used by procedures or small blocks of code. These
# registers are not named (or they are .name'd and .unname'd in small
# code blocks).
#
# Function parameters are passed and returned in $1, $2, $3, etc.
#
.name return, $31 # MIPS R4000 convention for JAL op
.name dlcount, $30 # curr counter of DL buffer
.name dinp, $29 # curr pointer into DL buffer
.name inp, $28 # DRAM ptr of current DL location (for stack)
.name gcount, $27 # size remaining of DL (not just in DMEM)
.name aud0, $26 # holds first word of DL command
.name aud1, $25 # holds second word of DL command
.name parbase, $24 # holds the base of the parameter area in DMEM
.name scrbase, $23 # holds the base of the scratch area in DMEM
.name zero, $0
############################################################################
#
# Vector Register Usage Conventions:
#
# Similar to scalar registers, named registers start at $v31 and grow down.
# These should only be re-used carefully, possibly saved/restored.
# (during development we might re-shuffle these so the more crucial
# or stable ones remain higher)
#
# Register $v0 is NOT always 0, like in the MIPS R4000 spec.
#
# Starting from $v1 growing up, we use 'temporary' registers which
# are free to be used by procedures or small blocks of code. These
# registers are not named (or they are .name'd and .unname'd in small
# code blocks).
#
# Function parameters are passed and returned in $v1, $v2, $v3, etc.
#
#endif /* _aud_regs_h_ */