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X86: Make string instructions work when rcx=0.

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This commit is contained in:
Gabe Black 2008-06-12 00:48:15 -04:00
parent 8688ef3fe5
commit de6eeaaa27
6 changed files with 44 additions and 9 deletions
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6
src/arch/x86/isa/insts/general_purpose/input_output/string_io.py
View file

@ -70,6 +70,8 @@ def macroop INS_M_R {
};
def macroop INS_E_M_R {
and t0, rcx, rcx, flags=(EZF,), dataSize=asz
bri t0, label("end"), flags=(CEZF,)
# Find the constant we need to either add or subtract from rdi
ruflag t0, 10
movi t3, t3, dsz, flags=(CEZF,), dataSize=asz
@ -85,6 +87,7 @@ topOfLoop:
subi rcx, rcx, 1, flags=(EZF,), dataSize=asz
add rdi, rdi, t3, dataSize=asz
bri t0, label("topOfLoop"), flags=(nCEZF,)
end:
fault "NoFault"
};
@ -104,6 +107,8 @@ def macroop OUTS_R_M {
};
def macroop OUTS_E_R_M {
and t0, rcx, rcx, flags=(EZF,), dataSize=asz
bri t0, label("end"), flags=(CEZF,)
# Find the constant we need to either add or subtract from rdi
ruflag t0, 10
movi t3, t3, dsz, flags=(CEZF,), dataSize=asz
@ -119,6 +124,7 @@ topOfLoop:
subi rcx, rcx, 1, flags=(EZF,), dataSize=asz
add rsi, rsi, t3, dataSize=asz
bri t0, label("topOfLoop"), flags=(nCEZF,)
end:
fault "NoFault"
};
'''

16
src/arch/x86/isa/insts/general_purpose/string/compare_strings.py
View file

@ -1,4 +1,4 @@
# Copyright (c) 2007 The Hewlett-Packard Development Company
# Copyright (c) 2007-2008 The Hewlett-Packard Development Company
# All rights reserved.
#
# Redistribution and use of this software in source and binary forms,
@ -75,12 +75,16 @@ def macroop CMPS_M_M {
#
def macroop CMPS_E_M_M {
and t0, rcx, rcx, flags=(EZF,), dataSize=asz
bri t0, label("end"), flags=(CEZF,)
# Find the constant we need to either add or subtract from rdi
ruflag t0, 10
movi t3, t3, dsz, flags=(CEZF,), dataSize=asz
subi t4, t0, dsz, dataSize=asz
mov t3, t3, t4, flags=(nCEZF,), dataSize=asz
topOfLoop:
ld t1, seg, [1, t0, rsi]
ld t2, es, [1, t0, rdi]
sub t0, t1, t2, flags=(OF, SF, ZF, AF, PF, CF)
@ -88,17 +92,22 @@ def macroop CMPS_E_M_M {
subi rcx, rcx, 1, flags=(EZF,), dataSize=asz
add rdi, rdi, t3, dataSize=asz
add rsi, rsi, t3, dataSize=asz
bri t0, 4, flags=(CSTRZnEZF,)
bri t0, label("topOfLoop"), flags=(CSTRZnEZF,)
end:
fault "NoFault"
};
def macroop CMPS_N_M_M {
and t0, rcx, rcx, flags=(EZF,), dataSize=asz
bri t0, label("end"), flags=(CEZF,)
# Find the constant we need to either add or subtract from rdi
ruflag t0, 10
movi t3, t3, dsz, flags=(CEZF,), dataSize=asz
subi t4, t0, dsz, dataSize=asz
mov t3, t3, t4, flags=(nCEZF,), dataSize=asz
topOfLoop:
ld t1, seg, [1, t0, rsi]
ld t2, es, [1, t0, rdi]
sub t0, t1, t2, flags=(OF, SF, ZF, AF, PF, CF)
@ -106,7 +115,8 @@ def macroop CMPS_N_M_M {
subi rcx, rcx, 1, flags=(EZF,), dataSize=asz
add rdi, rdi, t3, dataSize=asz
add rsi, rsi, t3, dataSize=asz
bri t0, 4, flags=(CSTRnZnEZF,)
bri t0, label("topOfLoop"), flags=(CSTRnZnEZF,)
end:
fault "NoFault"
};
'''

5
src/arch/x86/isa/insts/general_purpose/string/load_string.py
View file

@ -1,4 +1,4 @@
# Copyright (c) 2007 The Hewlett-Packard Development Company
# Copyright (c) 2007-2008 The Hewlett-Packard Development Company
# All rights reserved.
#
# Redistribution and use of this software in source and binary forms,
@ -67,6 +67,8 @@ def macroop LODS_M {
};
def macroop LODS_E_M {
and t0, rcx, rcx, flags=(EZF,), dataSize=asz
bri t0, label("end"), flags=(CEZF,)
# Find the constant we need to either add or subtract from rdi
ruflag t0, 10
movi t3, t3, dsz, flags=(CEZF,), dataSize=asz
@ -79,6 +81,7 @@ topOfLoop:
subi rcx, rcx, 1, flags=(EZF,), dataSize=asz
add rdi, rdi, t3, dataSize=asz
bri t0, label("topOfLoop"), flags=(nCEZF,)
end:
fault "NoFault"
};
'''

5
src/arch/x86/isa/insts/general_purpose/string/move_string.py
View file

@ -1,4 +1,4 @@
# Copyright (c) 2007 The Hewlett-Packard Development Company
# Copyright (c) 2007-2008 The Hewlett-Packard Development Company
# All rights reserved.
#
# Redistribution and use of this software in source and binary forms,
@ -69,6 +69,8 @@ def macroop MOVS_M_M {
};
def macroop MOVS_E_M_M {
and t0, rcx, rcx, flags=(EZF,), dataSize=asz
bri t0, label("end"), flags=(CEZF,)
# Find the constant we need to either add or subtract from rdi
ruflag t0, 10
movi t3, t3, dsz, flags=(CEZF,), dataSize=asz
@ -83,6 +85,7 @@ topOfLoop:
add rdi, rdi, t3, dataSize=asz
add rsi, rsi, t3, dataSize=asz
bri t0, label("topOfLoop"), flags=(nCEZF,)
end:
fault "NoFault"
};
'''

16
src/arch/x86/isa/insts/general_purpose/string/scan_string.py
View file

@ -1,4 +1,4 @@
# Copyright (c) 2007 The Hewlett-Packard Development Company
# Copyright (c) 2007-2008 The Hewlett-Packard Development Company
# All rights reserved.
#
# Redistribution and use of this software in source and binary forms,
@ -73,34 +73,44 @@ def macroop SCAS_M {
#
def macroop SCAS_E_M {
and t0, rcx, rcx, flags=(EZF,), dataSize=asz
bri t0, label("end"), flags=(CEZF,)
# Find the constant we need to either add or subtract from rdi
ruflag t0, 10
movi t2, t2, dsz, flags=(CEZF,), dataSize=asz
subi t3, t0, dsz, dataSize=asz
mov t2, t2, t3, flags=(nCEZF,), dataSize=asz
topOfLoop:
ld t1, es, [1, t0, rdi]
sub t0, t1, rax, flags=(OF, SF, ZF, AF, PF, CF)
subi rcx, rcx, 1, flags=(EZF,), dataSize=asz
add rdi, rdi, t2, dataSize=asz
bri t0, 4, flags=(CSTRZnEZF,)
bri t0, label("topOfLoop"), flags=(CSTRZnEZF,)
end:
fault "NoFault"
};
def macroop SCAS_N_M {
and t0, rcx, rcx, flags=(EZF,), dataSize=asz
bri t0, label("end"), flags=(CEZF,)
# Find the constant we need to either add or subtract from rdi
ruflag t0, 10
movi t2, t2, dsz, flags=(CEZF,), dataSize=asz
subi t3, t0, dsz, dataSize=asz
mov t2, t2, t3, flags=(nCEZF,), dataSize=asz
topOfLoop:
ld t1, es, [1, t0, rdi]
sub t0, t1, rax, flags=(OF, SF, ZF, AF, PF, CF)
subi rcx, rcx, 1, flags=(EZF,), dataSize=asz
add rdi, rdi, t2, dataSize=asz
bri t0, 4, flags=(CSTRnZnEZF,)
bri t0, label("topOfLoop"), flags=(CSTRnZnEZF,)
end:
fault "NoFault"
};

5
src/arch/x86/isa/insts/general_purpose/string/store_string.py
View file

@ -1,4 +1,4 @@
# Copyright (c) 2007 The Hewlett-Packard Development Company
# Copyright (c) 2007-2008 The Hewlett-Packard Development Company
# All rights reserved.
#
# Redistribution and use of this software in source and binary forms,
@ -67,6 +67,8 @@ def macroop STOS_M {
};
def macroop STOS_E_M {
and t0, rcx, rcx, flags=(EZF,), dataSize=asz
bri t0, label("end"), flags=(CEZF,)
# Find the constant we need to either add or subtract from rdi
ruflag t0, 10
movi t3, t3, dsz, flags=(CEZF,), dataSize=asz
@ -79,6 +81,7 @@ topOfLoop:
subi rcx, rcx, 1, flags=(EZF,), dataSize=asz
add rdi, rdi, t3, dataSize=asz
bri t0, label("topOfLoop"), flags=(nCEZF,)
end:
fault "NoFault"
};
'''