diff options
Diffstat (limited to 'src')
| -rwxr-xr-x | src/ppe/tools/PowerPCtoPPE/ppc-ppe-pcp.py | 39 |
1 files changed, 27 insertions, 12 deletions
diff --git a/src/ppe/tools/PowerPCtoPPE/ppc-ppe-pcp.py b/src/ppe/tools/PowerPCtoPPE/ppc-ppe-pcp.py index 1d6635f..e3bd089 100755 --- a/src/ppe/tools/PowerPCtoPPE/ppc-ppe-pcp.py +++ b/src/ppe/tools/PowerPCtoPPE/ppc-ppe-pcp.py @@ -419,9 +419,15 @@ def p2p_replace(line, ppc_op): print newline # construct and write "mr R3, RA" to copy the operand RA to R3 - newline = inst.group(1) + 'mr' + inst.group(3) + '3' +\ - inst.group(5) + inst.group(6) - print newline + # if RA == R3 then R3 was clobbered, restore R3 from stack + if inst.group(6) == '3': + newline = inst.group(1) + 'lwz' + inst.group(3) + '3' +\ + inst.group(5) + '8(1)' + print newline + else: + newline = inst.group(1) + 'mr' + inst.group(3) + '3' +\ + inst.group(5) + inst.group(6) + print newline # if 'mulli' is detected, using 'li' instead of 'mr' for second operand if ppc_op == 'mulli': @@ -429,11 +435,13 @@ def p2p_replace(line, ppc_op): else: temp_op = 'mr' - # construct and write "mr R4, RB" to copy the operand RB to R4 - # or in 'mulli' case, "li R4, IM" to copy the operand IM to R4 - newline = inst.group(1) + temp_op + inst.group(3) + '4' +\ - inst.group(5) + inst.group(8) - print newline + # Set R4 if R4 is not already RB + if temp_op == 'li' or inst.group(8) != '4': + # construct and write "mr R4, RB" to copy the operand RB to R4 + # or in 'mulli' case, "li R4, IM" to copy the operand IM to R4 + newline = inst.group(1) + temp_op + inst.group(3) + '4' +\ + inst.group(5) + inst.group(8) + print newline # using branch and link(bl) to branch to subroutine # later subroutine can branch back using branch link register(blr) @@ -442,10 +450,17 @@ def p2p_replace(line, ppc_op): newline = inst.group(1) + 'bl' + inst.group(3) + ppe_op print newline - # construct and write "mr RT, R3" to copy the result in R3 to RT - newline = inst.group(1) + 'mr' + inst.group(3) + inst.group(4) +\ - inst.group(5) + '3' - print newline + # if RT is not already R3 then copy R3 to RT + if inst.group(4) != '3': + # construct and write "mr RT, R3" to copy the result in R3 to RT + newline = inst.group(1) + 'mr' + inst.group(3) + inst.group(4) +\ + inst.group(5) + '3' + print newline + else: + # save return on stack + newline = inst.group(1) + 'stw' + inst.group(3) + '3' +\ + inst.group(5) + '8(1)' + print newline # construct and write "lwz R3, 16(R1)" to fetch the LR value from stack newline = inst.group(1) + 'lwz' + inst.group(3) + '3' +\ |
