tst_regs.h
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#ifndef _tst_regs_h_
#define _tst_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 return_save, $30
.name rsp_state, $29 # pointer to RSP state in DMEM
.name tri_x, $28
.name tri_y, $27
.name numtri, $26
.name shadecol, $25
.name shadecov, $24
.name outp, $23
.name tloc_x, $22
.name tloc_y, $21
.name mem_addr, $20
.name dram_addr, $19
.name dma_len, $18
.name iswrite, $17
.name numtst, $16
.name zero, $0
.name taskhdr, $1
.name parm1, $2
.name parm2, $3
.name parm3, $4
.name parm4, $5
.name parm5, $6
.name parm6, $7
.name parm7, $8
.name tmp, $9
.unname mem_addr
.unname dram_addr
.unname dma_len
.unname iswrite
.unname tmp
/* $10 ... $19 reserved for test use */
############################################################################
#
# 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.
#
.name vconst, $v31
.name vconst1, $v30
#endif /* _tst_regs_h_ */