| 50695fb8 | 10-Sep-2024 |
Richard Henderson <richard.henderson@linaro.org> |
tcg/s390x: Optimize cmpsel with constant 0/-1 arguments
These can be simplified to and/or/andc/orc,
avoiding the load of the constantinto a register.
Signed-off-by: Richard Henderson <richard.hende
tcg/s390x: Optimize cmpsel with constant 0/-1 arguments
These can be simplified to and/or/andc/orc,
avoiding the load of the constantinto a register.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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| d95b51d3 | 28-Oct-2023 |
Richard Henderson <richard.henderson@linaro.org> |
tcg/s390x: Add TCG_CT_CONST_CMP
Better constraint for tcg_out_cmp, based on the comparison.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henders
tcg/s390x: Add TCG_CT_CONST_CMP
Better constraint for tcg_out_cmp, based on the comparison.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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| 238f4380 | 24-Mar-2023 |
Richard Henderson <richard.henderson@linaro.org> |
tcg: Widen CPUTLBEntry comparators to 64-bits
This makes CPUTLBEntry agnostic to the address size of the guest.
When 32-bit addresses are in effect, we can simply read the low
32 bits of the 64-bit
tcg: Widen CPUTLBEntry comparators to 64-bits
This makes CPUTLBEntry agnostic to the address size of the guest.
When 32-bit addresses are in effect, we can simply read the low
32 bits of the 64-bit field. Similarly when we need to update
the field for setting TLB_NOTDIRTY.
For TCG backends that could in theory be big-endian, but in
practice are not (arm, loongarch, riscv), use QEMU_BUILD_BUG_ON
to document and ensure this is not accidentally missed.
For s390x, which is always big-endian, use HOST_BIG_ENDIAN anyway,
to document the reason for the adjustment.
For sparc64 and ppc64, always perform a 64-bit load, and rely on
the following 32-bit comparison to ignore the high bits.
Rearrange mips and ppc if ladders for clarity.
Reviewed-by: Anton Johansson <anjo@rev.ng>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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