qemu/tcg/i386/tcg-target-con-str.h
Richard Henderson d3d1c30c63 tcg/i386: Improve TSTNE/TESTEQ vs powers of two
Use "test x,x" when the bit is one of the 4 sign bits.
Use "bt imm,x" otherwise.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03 23:53:49 +00:00

34 lines
904 B
C

/* SPDX-License-Identifier: MIT */
/*
* Define i386 target-specific operand constraints.
* Copyright (c) 2021 Linaro
*
*/
/*
* Define constraint letters for register sets:
* REGS(letter, register_mask)
*/
REGS('a', 1u << TCG_REG_EAX)
REGS('b', 1u << TCG_REG_EBX)
REGS('c', 1u << TCG_REG_ECX)
REGS('d', 1u << TCG_REG_EDX)
REGS('S', 1u << TCG_REG_ESI)
REGS('D', 1u << TCG_REG_EDI)
REGS('r', ALL_GENERAL_REGS)
REGS('x', ALL_VECTOR_REGS)
REGS('q', ALL_BYTEL_REGS) /* regs that can be used as a byte operand */
REGS('L', ALL_GENERAL_REGS & ~SOFTMMU_RESERVE_REGS) /* qemu_ld/st */
REGS('s', ALL_BYTEL_REGS & ~SOFTMMU_RESERVE_REGS) /* qemu_st8_i32 data */
/*
* Define constraint letters for constants:
* CONST(letter, TCG_CT_CONST_* bit set)
*/
CONST('e', TCG_CT_CONST_S32)
CONST('I', TCG_CT_CONST_I32)
CONST('T', TCG_CT_CONST_TST)
CONST('W', TCG_CT_CONST_WSZ)
CONST('Z', TCG_CT_CONST_U32)