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X86: Add support for x86 psrldq and pslldq instructions

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These are complicated instructions and the micro-code might be suboptimal.

This has been tested with some small sample programs (attached)

The psrldq instruction is needed by various spec2k programs.
This commit is contained in:
Vince Weaver 2009-10-30 12:49:37 -04:00
parent 5873ec2238
commit a12557439b
3 changed files with 78 additions and 4 deletions
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4
src/arch/x86/isa/decoder/two_byte_opcodes.isa
View file

@ -673,9 +673,9 @@
//0x3: group14_pshimq();
0x3: decode MODRM_REG {
0x2: PSRLQ(VRo,Ib);
0x3: WarnUnimpl::psrldq_VRo_Ib();
0x3: PSRLDQ(VRo,Ib);
0x6: PSLLQ(VRo,Ib);
0x7: WarnUnimpl::pslldq_VRo_Ib();
0x7: PSLLDQ(VRo,Ib);
default: UD2();
}
0x4: PCMPEQB(Vo,Wo);

40
src/arch/x86/isa/insts/simd128/integer/shift/left_logical_shift.py
View file

@ -122,5 +122,43 @@ def macroop PSLLQ_XMM_I {
mslli xmml, xmml, imm, size=8, ext=0
mslli xmmh, xmmh, imm, size=8, ext=0
};
def macroop PSLLDQ_XMM_I {
limm t2, 8
subi t1, t2, imm, flags=(ECF,), dataSize=1
br label("pslldq_less_8"), flags=(nCECF,)
# Greater than 8
limm t2, 16
subi t1, t2, imm, flags=(ECF,), dataSize=1
br label("pslldq_less_16"), flags=(nCECF,)
# Greater than 16
lfpimm xmml, 0
lfpimm xmmh, 0
br label("pslldq_end")
pslldq_less_16:
# Between 8 and 16
mslli xmmh, xmml, "(IMMEDIATE-8)<<3", size=8, ext=0
lfpimm xmml, 0
br label("pslldq_end")
pslldq_less_8:
# Less than 8
msrli ufp1, xmml, "(8-IMMEDIATE) << 3", size=8, ext=0
mslli xmmh, xmmh, "IMMEDIATE << 3", size=8, ext=0
mslli xmml, xmml, "IMMEDIATE << 3", size=8, ext=0
mor xmmh, xmmh, ufp1
pslldq_end:
fault "NoFault"
};
'''
# PSLLDQ

38
src/arch/x86/isa/insts/simd128/integer/shift/right_logical_shift.py
View file

@ -122,5 +122,41 @@ def macroop PSRLQ_XMM_I {
msrli xmml, xmml, imm, size=8, ext=0
msrli xmmh, xmmh, imm, size=8, ext=0
};
def macroop PSRLDQ_XMM_I {
limm t2, 8
subi t1, t2, imm, flags=(ECF,), dataSize=1
br label("psrldq_less_8"), flags=(nCECF,)
# Greater than 8
limm t2, 16
subi t1, t2, imm, flags=(ECF,), dataSize=1
br label("psrldq_less_16"), flags=(nCECF,)
# Greater than 16
lfpimm xmml, 0
lfpimm xmmh, 0
br label("psrldq_end")
psrldq_less_16:
# Between 8 and 16
msrli xmml, xmmh, "(IMMEDIATE-8)<<3", size=8, ext=0
lfpimm xmmh, 0
br label("psrldq_end")
psrldq_less_8:
# Less than 8
mslli ufp1, xmmh, "(8-IMMEDIATE) << 3", size=8, ext=0
msrli xmml, xmml, "IMMEDIATE << 3", size=8, ext=0
msrli xmmh, xmmh, "IMMEDIATE << 3", size=8, ext=0
mor xmml, xmml, ufp1
psrldq_end:
fault "NoFault"
};
'''
# PSRLDQ