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X86: Fix the implementation of BSF.

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This commit is contained in:
Gabe Black
2008-06-12 00:46:04 -04:00
parent 16e189fad2
commit 8e2991b529
1 changed files with 54 additions and 36 deletions
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90
src/arch/x86/isa/insts/general_purpose/compare_and_test/bit_scan.py
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@@ -250,33 +250,39 @@ def macroop BSF_R_R {
# Bit 6
srli t3, t1, 32, dataSize=8
andi t3, t3, 32
or reg, reg, t3
andi t4, t3, 32, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
# Bit 5
srli t3, t1, 16, dataSize=8
andi t3, t3, 16
or reg, reg, t3
andi t4, t3, 16, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
# Bit 4
srli t3, t1, 8, dataSize=8
andi t3, t3, 8
or reg, reg, t3
andi t4, t3, 8, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
# Bit 3
srli t3, t1, 4, dataSize=8
andi t3, t3, 4
or reg, reg, t3
andi t4, t3, 4, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
# Bit 2
srli t3, t1, 2, dataSize=8
andi t3, t3, 2
or reg, reg, t3
andi t4, t3, 2, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
# Bit 1
srli t3, t1, 1, dataSize=8
andi t3, t3, 1
or reg, reg, t3
andi t4, t3, 1, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
end:
fault "NoFault"
@@ -299,33 +305,39 @@ def macroop BSF_R_M {
# Bit 6
srli t3, t1, 32, dataSize=8
andi t3, t3, 32
or reg, reg, t3
andi t4, t3, 32, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
# Bit 5
srli t3, t1, 16, dataSize=8
andi t3, t3, 16
or reg, reg, t3
andi t4, t3, 16, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
# Bit 4
srli t3, t1, 8, dataSize=8
andi t3, t3, 8
or reg, reg, t3
andi t4, t3, 8, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
# Bit 3
srli t3, t1, 4, dataSize=8
andi t3, t3, 4
or reg, reg, t3
andi t4, t3, 4, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
# Bit 2
srli t3, t1, 2, dataSize=8
andi t3, t3, 2
or reg, reg, t3
andi t4, t3, 2, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
# Bit 1
srli t3, t1, 1, dataSize=8
andi t3, t3, 1
or reg, reg, t3
andi t4, t3, 1, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
end:
fault "NoFault"
@@ -349,33 +361,39 @@ def macroop BSF_R_P {
# Bit 6
srli t3, t1, 32, dataSize=8
andi t3, t3, 32
or reg, reg, t3
andi t4, t3, 32, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
# Bit 5
srli t3, t1, 16, dataSize=8
andi t3, t3, 16
or reg, reg, t3
andi t4, t3, 16, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
# Bit 4
srli t3, t1, 8, dataSize=8
andi t3, t3, 8
or reg, reg, t3
andi t4, t3, 8, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
# Bit 3
srli t3, t1, 4, dataSize=8
andi t3, t3, 4
or reg, reg, t3
andi t4, t3, 4, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
# Bit 2
srli t3, t1, 2, dataSize=8
andi t3, t3, 2
or reg, reg, t3
andi t4, t3, 2, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
# Bit 1
srli t3, t1, 1, dataSize=8
andi t3, t3, 1
or reg, reg, t3
andi t4, t3, 1, flags=(EZF,)
or reg, reg, t4
mov t1, t1, t3, flags=(nCEZF,)
end:
fault "NoFault"