Re: [Qemu-devel] PATCH, RFC: Convert x86 SSE ops to TCG

[C.W. Betts]

On Wednesday 19 March 2008 01:23:27 pm Blue Swirl wrote:
> These patches converts x86 SSE ops to TCG, which could possibly help
> compiling Qemu using some GCC versions on i386 host. The resulting
> version does not crash immediately. Please test.

I get the following errors when I compile the helper.c file using gcc 3.4.6:
gcc-3.4  -fomit-frame-pointer -I. -I.. 
-I/home/test/makestuff/qemu-sse/target-i386 -I/home/test/makestuff/qemu-sse 
-MMD -MP -DNEED_CPU_H -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE 
-I/home/test/makestuff/qemu-sse/tcg -I/home/test/makestuff/qemu-sse/tcg/i386 
-I/home/test/makestuff/qemu-sse/fpu  -DHAS_AUDIO -DHAS_AUDIO_CHOICE 
-I/home/test/makestuff/qemu-sse/slirp -mfpmath=sse -march=pentium3 -msse -Wall 
-O2 -g -fno-strict-aliasing -mfpmath=sse -march=pentium3 -msse -m32 -c -o 
helper.o /home/test/makestuff/qemu-sse/target-i386/helper.c
/home/test/makestuff/qemu-sse/target-i386/helper.c: In function 
`svm_check_intercept_param':
/home/test/makestuff/qemu-sse/target-i386/helper.c:4315: error: unable to find 
a register to spill in class `GENERAL_REGS'
/home/test/makestuff/qemu-sse/target-i386/helper.c:4315: error: this is the 
insn:
(insn:HI 353 352 354 39 /home/test/makestuff/qemu-sse/target-i386/helper.c:4308 
(parallel [
            (set (reg:DI 167 [ <variable>.intercept ])
                (lshiftrt:DI (reg:DI 167 [ <variable>.intercept ])
                    (subreg:QI (reg:SI 166) 0)))
            (clobber (scratch:SI))
            (clobber (reg:CC 17 flags))
        ]) 309 {lshrdi3_1} (insn_list 351 (insn_list 352 (nil)))
    (expr_list:REG_DEAD (reg:SI 166)
        (expr_list:REG_UNUSED (reg:CC 17 flags)
            (expr_list:REG_UNUSED (scratch:SI)
                (nil)))))
/home/test/makestuff/qemu-sse/target-i386/helper.c:4315: confused by earlier 
errors, bailing out
make: *** [helper.o] Error 1

and the following when using gcc 4.2:
gcc  -fomit-frame-pointer -I. -I.. -I/home/test/makestuff/qemu-sse/target-i386 
-I/home/test/makestuff/qemu-sse -MMD -MP -DNEED_CPU_H -D_GNU_SOURCE 
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -I/home/test/makestuff/qemu-sse/tcg 
-I/home/test/makestuff/qemu-sse/tcg/i386 -I/home/test/makestuff/qemu-sse/fpu  
-DHAS_AUDIO -DHAS_AUDIO_CHOICE -I/home/test/makestuff/qemu-sse/slirp 
-mfpmath=sse -march=pentium3 -msse -Wall -O2 -g -fno-strict-aliasing 
-mfpmath=sse -march=pentium3 -msse -m32 -c -o helper.o 
/home/test/makestuff/qemu-sse/target-i386/helper.c
/home/test/makestuff/qemu-sse/target-i386/ops_sse.h: In function 
‘helper_pshufw_mmx’:
/home/test/makestuff/qemu-sse/target-i386/ops_sse.h:583: error: unable to find 
a register to spill in class ‘GENERAL_REGS’
/home/test/makestuff/qemu-sse/target-i386/ops_sse.h:583: error: this is the 
insn:
(insn:HI 48 60 49 2 /home/test/makestuff/qemu-sse/target-i386/ops_sse.h:582 
(set (mem/s:DI (plus:SI (reg:SI 60 [ env.850 ])
                (reg/v:SI 62 [ dst_offset ])) [0 S8 A32])
        (reg/v:DI 61 [ r ])) 56 {*movdi_2} (insn_list:REG_DEP_TRUE 3 
(insn_list:REG_DEP_TRUE 46 (nil)))
    (expr_list:REG_DEAD (reg/v:DI 61 [ r ])
        (expr_list:REG_DEAD (reg:SI 60 [ env.850 ])
            (expr_list:REG_DEAD (reg/v:SI 62 [ dst_offset ])
                (nil)))))
/home/test/makestuff/qemu-sse/target-i386/ops_sse.h:583: confused by earlier 
errors, bailing out
make: *** [helper.o] Error 1

Also, the x86_64 target compiled, but didn't link, saying that funtions 
'gen_op_movq_T0_mm_mmx' and 'gen_op_movq_mm_T0_mmx' had undefined references.

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