xemu/target
Paolo Bonzini d1bb978ba1 target/i386: fix cmpxchg with 32-bit register destination
Unlike the memory case, where "the destination operand receives a write
cycle without regard to the result of the comparison", rm must not be
touched altogether if the write fails, including not zero-extending
it on 64-bit processors.  This is not how the movcond currently works,
because it is always followed by a gen_op_mov_reg_v to rm.

To fix it, introduce a new function that is similar to gen_op_mov_reg_v
but writes to a TCG temporary.

Considering that gen_extu(ot, oldv) is not needed in the memory case
either, the two cases for register and memory destinations are different
enough that one might as well fuse the two "if (mod == 3)" into one.
So do that too.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/508
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[rth: Add a test case ]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-11-15 09:34:42 +10:00
..
alpha accel/tcg: Remove will_exit argument from cpu_restore_state 2022-11-01 08:31:41 +11:00
arm target/arm: Two fixes for secure ptw 2022-11-04 10:58:58 +00:00
avr target/avr: Convert to tcg_ops restore_state_to_opc 2022-10-26 11:11:28 +10:00
cris accel/tcg: Remove will_exit argument from cpu_restore_state 2022-11-01 08:31:41 +11:00
hexagon target/hexagon: Convert to tcg_ops restore_state_to_opc 2022-10-26 11:11:28 +10:00
hppa target/hppa: Convert to tcg_ops restore_state_to_opc 2022-10-26 11:11:28 +10:00
i386 target/i386: fix cmpxchg with 32-bit register destination 2022-11-15 09:34:42 +10:00
loongarch target/loongarch: Fix return value of CHECK_FPE 2022-11-07 10:54:11 +08:00
m68k target/m68k: Rename qregs.def -> qregs.h.inc 2022-11-05 20:35:45 +01:00
microblaze accel/tcg: Remove will_exit argument from cpu_restore_state 2022-11-01 08:31:41 +11:00
mips target/mips: Don't check COP1X for 64 bit FP mode 2022-11-08 01:04:25 +01:00
nios2 accel/tcg: Remove will_exit argument from cpu_restore_state 2022-11-01 08:31:41 +11:00
openrisc accel/tcg: Remove will_exit argument from cpu_restore_state 2022-11-01 08:31:41 +11:00
ppc accel/tcg: Remove will_exit argument from cpu_restore_state 2022-11-01 08:31:41 +11:00
riscv Revert incorrect cflags initialization. 2022-10-26 10:53:41 -04:00
rx Revert incorrect cflags initialization. 2022-10-26 10:53:41 -04:00
s390x target/s390x: Rename insn-data/format.def -> insn-data/format.h.inc 2022-11-05 20:35:45 +01:00
sh4 target/sh4: Convert to tcg_ops restore_state_to_opc 2022-10-26 11:11:28 +10:00
sparc target/sparc: Convert to tcg_ops restore_state_to_opc 2022-10-26 11:11:28 +10:00
tricore target/tricore: Rename csfr.def -> csfr.h.inc 2022-11-05 20:35:45 +01:00
xtensa accel/tcg: Remove will_exit argument from cpu_restore_state 2022-11-01 08:31:41 +11:00
Kconfig hw/loongarch: Add support loongson3 virt machine type. 2022-06-06 18:09:03 +00:00
meson.build target/loongarch: Add target build suport 2022-06-06 18:09:03 +00:00