Re: [Qemu-devel] [4438] temporary hack to handle register shortage with dyngen for qemu_st64 ()

[Rick Vernam]

First, thanks to all for your time & energy...
I saw all the changes, and decided to take it for a spin.
(and yes, I know gcc4 is not 'supported' ...)
It fails to compile in target-i386/translate.c ...
I poked around a bit, but to no avail.
Perhaps you knew about this, in which case sorry for the noise.

./configure --prefix=/usr/bin --enable-ac97 --enable-alsa --disable-vnc-tls 
--disable-gcc-check --target-list=x86_64-softmmu

gcc -I. -I.. -I/home/rick/docs/qemu/trunk/target-i386 
-I/home/rick/docs/qemu/trunk -MMD -MP -DNEED_CPU_H -D_GNU_SOURCE 
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -I/home/rick/docs/qemu/trunk/tcg 
-I/home/rick/docs/qemu/trunk/tcg/x86_64 -I/home/rick/docs/qemu/trunk/fpu 
-DHAS_AUDIO -DHAS_AUDIO_CHOICE -I/home/rick/docs/qemu/trunk/slirp -Wall -O2 -g 
-fno-strict-aliasing  -m64 -c -o 
helper2.o /home/rick/docs/qemu/trunk/target-i386/helper2.c
gcc -I. -I.. -I/home/rick/docs/qemu/trunk/target-i386 
-I/home/rick/docs/qemu/trunk -MMD -MP -DNEED_CPU_H -D_GNU_SOURCE 
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -I/home/rick/docs/qemu/trunk/tcg 
-I/home/rick/docs/qemu/trunk/tcg/x86_64 -I/home/rick/docs/qemu/trunk/fpu 
-DHAS_AUDIO -DHAS_AUDIO_CHOICE -I/home/rick/docs/qemu/trunk/slirp -Wall -O2 -g 
-fno-strict-aliasing  -m64 -c -o 
disas.o /home/rick/docs/qemu/trunk/disas.c
rm -f libqemu.a
ar rcs libqemu.a exec.o kqemu.o translate-all.o cpu-exec.o translate.o 
host-utils.o op.o tcg/tcg.o tcg/tcg-dyngen.o tcg/tcg-runtime.o 
fpu/softfloat-native.o helper.o helper2.o disas.o i386-dis.o
gcc -g  -m64 -o qemu-system-x86_64 vl.o osdep.o monitor.o pci.o loader.o 
isa_mmio.o machine.o block-raw-posix.o lsi53c895a.o esp.o usb-ohci.o 
eeprom93xx.o eepro100.o ne2000.o pcnet.o rtl8139.o e1000.o ide.o pckbd.o 
ps2.o vga.o sb16.o es1370.o ac97.o dma.o fdc.o mc146818rtc.o serial.o i8259.o 
i8254.o pcspk.o pc.o cirrus_vga.o apic.o parallel.o acpi.o piix_pci.o 
usb-uhci.o vmmouse.o vmport.o vmware_vga.o gdbstub.o ../libqemu_common.a 
libqemu.a  -lm -lz -lasound -lrt -lpthread -lutil -lSDL -lpthread  -lcurses
libqemu.a(translate.o): In function `optimize_flags_init':
/home/rick/docs/qemu/trunk/target-i386/translate.c:6694: undefined reference 
to `tcg_global_reg2_new_hack'
collect2: ld returned 1 exit status


On Monday 12 May 2008 08:49:16 am Fabrice Bellard wrote:
> Revision: 4438
>           http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=4438
> Author:   bellard
> Date:     2008-05-12 13:49:14 +0000 (Mon, 12 May 2008)
>
> Log Message:
> -----------
> temporary hack to handle register shortage with dyngen for qemu_st64()
>
> Modified Paths:
> --------------
>     trunk/tcg/tcg.c
>     trunk/tcg/tcg.h
>
> Modified: trunk/tcg/tcg.c
> ===================================================================
> --- trunk/tcg/tcg.c   2008-05-12 12:23:31 UTC (rev 4437)
> +++ trunk/tcg/tcg.c   2008-05-12 13:49:14 UTC (rev 4438)
> @@ -308,6 +308,45 @@
>      return MAKE_TCGV(idx);
>  }
>
> +#if TCG_TARGET_REG_BITS == 32
> +/* temporary hack to avoid register shortage for tcg_qemu_st64() */
> +TCGv tcg_global_reg2_new_hack(TCGType type, int reg1, int reg2,
> +                              const char *name)
> +{
> +    TCGContext *s = &tcg_ctx;
> +    TCGTemp *ts;
> +    int idx;
> +    char buf[64];
> +
> +    if (type != TCG_TYPE_I64)
> +        tcg_abort();
> +    idx = s->nb_globals;
> +    tcg_temp_alloc(s, s->nb_globals + 2);
> +    ts = &s->temps[s->nb_globals];
> +    ts->base_type = type;
> +    ts->type = TCG_TYPE_I32;
> +    ts->fixed_reg = 1;
> +    ts->reg = reg1;
> +    ts->val_type = TEMP_VAL_REG;
> +    pstrcpy(buf, sizeof(buf), name);
> +    pstrcat(buf, sizeof(buf), "_0");
> +    ts->name = strdup(buf);
> +
> +    ts++;
> +    ts->base_type = type;
> +    ts->type = TCG_TYPE_I32;
> +    ts->fixed_reg = 1;
> +    ts->reg = reg2;
> +    ts->val_type = TEMP_VAL_REG;
> +    pstrcpy(buf, sizeof(buf), name);
> +    pstrcat(buf, sizeof(buf), "_1");
> +    ts->name = strdup(buf);
> +
> +    s->nb_globals += 2;
> +    return MAKE_TCGV(idx);
> +}
> +#endif
> +
>  TCGv tcg_global_mem_new(TCGType type, int reg, tcg_target_long offset,
>                          const char *name)
>  {
>
> Modified: trunk/tcg/tcg.h
> ===================================================================
> --- trunk/tcg/tcg.h   2008-05-12 12:23:31 UTC (rev 4437)
> +++ trunk/tcg/tcg.h   2008-05-12 13:49:14 UTC (rev 4438)
> @@ -267,6 +267,8 @@
>                     tcg_target_long start, tcg_target_long size);
>  void tcg_set_macro_func(TCGContext *s, TCGMacroFunc *func);
>  TCGv tcg_global_reg_new(TCGType type, int reg, const char *name);
> +TCGv tcg_global_reg2_new_hack(TCGType type, int reg1, int reg2,
> +                              const char *name);
>  TCGv tcg_global_mem_new(TCGType type, int reg, tcg_target_long offset,
>                          const char *name);
>  TCGv tcg_temp_new(TCGType type);