Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 33 insertions, 0 deletions

diff --git a/tcg/i386/tcg-target-con-str.h b/tcg/i386/tcg-target-con-str.h
new file mode 100644
index 000000000..24e6bcb80
--- /dev/null
+++ b/tcg/i386/tcg-target-con-str.h
@@ -0,0 +1,33 @@
+/* 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('Q', ALL_BYTEH_REGS)     /* regs with a second byte (e.g. %ah) */
+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('W', TCG_CT_CONST_WSZ)
+CONST('Z', TCG_CT_CONST_U32)