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qemu/tcg/i386/tcg-target-con-set.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

60 lines
1.3 KiB
C

/* SPDX-License-Identifier: MIT */
/*
* Define i386 target-specific constraint sets.
* Copyright (c) 2021 Linaro
*/
/*
* C_On_Im(...) defines a constraint set with <n> outputs and <m> inputs.
* Each operand should be a sequence of constraint letters as defined by
* tcg-target-con-str.h; the constraint combination is inclusive or.
*
* C_N1_Im(...) defines a constraint set with 1 output and <m> inputs,
* except that the output must use a new register.
*
* C_Nn_Om_Ik(...) defines a constraint set with <n + m> outputs and <k>
* inputs, except that the first <n> outputs must use new registers.
*/
C_O0_I1(r)
C_O0_I2(L, L)
C_O0_I2(qi, r)
C_O0_I2(re, r)
C_O0_I2(ri, r)
C_O0_I2(r, reT)
C_O0_I2(s, L)
C_O0_I2(x, r)
C_O0_I3(L, L, L)
C_O0_I3(s, L, L)
C_O0_I4(L, L, L, L)
C_O0_I4(r, r, ri, ri)
C_O1_I1(r, 0)
C_O1_I1(r, L)
C_O1_I1(r, q)
C_O1_I1(r, r)
C_O1_I1(x, r)
C_O1_I1(x, x)
C_O1_I2(q, 0, qi)
C_O1_I2(q, r, reT)
C_O1_I2(r, 0, ci)
C_O1_I2(r, 0, r)
C_O1_I2(r, 0, re)
C_O1_I2(r, 0, reZ)
C_O1_I2(r, 0, ri)
C_O1_I2(r, 0, rI)
C_O1_I2(r, L, L)
C_O1_I2(r, r, re)
C_O1_I2(r, r, ri)
C_O1_I2(r, r, rI)
C_O1_I2(x, x, x)
C_N1_I2(r, r, r)
C_N1_I2(r, r, rW)
C_O1_I3(x, 0, x, x)
C_O1_I3(x, x, x, x)
C_O1_I4(r, r, reT, r, 0)
C_O1_I4(r, r, r, ri, ri)
C_O2_I1(r, r, L)
C_O2_I2(a, d, a, r)
C_O2_I2(r, r, L, L)
C_O2_I3(a, d, 0, 1, r)
C_N1_O1_I4(r, r, 0, 1, re, re)