| /* |
| * Tiny Code Generator for QEMU |
| * |
| * Copyright (c) 2009 Ulrich Hecht <uli@suse.de> |
| * Copyright (c) 2009 Alexander Graf <agraf@suse.de> |
| * Copyright (c) 2010 Richard Henderson <rth@twiddle.net> |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| /* We only support generating code for 64-bit mode. */ |
| #if TCG_TARGET_REG_BITS != 64 |
| #error "unsupported code generation mode" |
| #endif |
| |
| #include "tcg-pool.inc.c" |
| #include "elf.h" |
| |
| /* ??? The translation blocks produced by TCG are generally small enough to |
| be entirely reachable with a 16-bit displacement. Leaving the option for |
| a 32-bit displacement here Just In Case. */ |
| #define USE_LONG_BRANCHES 0 |
| |
| #define TCG_CT_CONST_S16 0x100 |
| #define TCG_CT_CONST_S32 0x200 |
| #define TCG_CT_CONST_S33 0x400 |
| #define TCG_CT_CONST_ZERO 0x800 |
| |
| /* Several places within the instruction set 0 means "no register" |
| rather than TCG_REG_R0. */ |
| #define TCG_REG_NONE 0 |
| |
| /* A scratch register that may be be used throughout the backend. */ |
| #define TCG_TMP0 TCG_REG_R1 |
| |
| /* A scratch register that holds a pointer to the beginning of the TB. |
| We don't need this when we have pc-relative loads with the general |
| instructions extension facility. */ |
| #define TCG_REG_TB TCG_REG_R12 |
| #define USE_REG_TB (!(s390_facilities & FACILITY_GEN_INST_EXT)) |
| |
| #ifndef CONFIG_SOFTMMU |
| #define TCG_GUEST_BASE_REG TCG_REG_R13 |
| #endif |
| |
| /* All of the following instructions are prefixed with their instruction |
| format, and are defined as 8- or 16-bit quantities, even when the two |
| halves of the 16-bit quantity may appear 32 bits apart in the insn. |
| This makes it easy to copy the values from the tables in Appendix B. */ |
| typedef enum S390Opcode { |
| RIL_AFI = 0xc209, |
| RIL_AGFI = 0xc208, |
| RIL_ALFI = 0xc20b, |
| RIL_ALGFI = 0xc20a, |
| RIL_BRASL = 0xc005, |
| RIL_BRCL = 0xc004, |
| RIL_CFI = 0xc20d, |
| RIL_CGFI = 0xc20c, |
| RIL_CLFI = 0xc20f, |
| RIL_CLGFI = 0xc20e, |
| RIL_CLRL = 0xc60f, |
| RIL_CLGRL = 0xc60a, |
| RIL_CRL = 0xc60d, |
| RIL_CGRL = 0xc608, |
| RIL_IIHF = 0xc008, |
| RIL_IILF = 0xc009, |
| RIL_LARL = 0xc000, |
| RIL_LGFI = 0xc001, |
| RIL_LGRL = 0xc408, |
| RIL_LLIHF = 0xc00e, |
| RIL_LLILF = 0xc00f, |
| RIL_LRL = 0xc40d, |
| RIL_MSFI = 0xc201, |
| RIL_MSGFI = 0xc200, |
| RIL_NIHF = 0xc00a, |
| RIL_NILF = 0xc00b, |
| RIL_OIHF = 0xc00c, |
| RIL_OILF = 0xc00d, |
| RIL_SLFI = 0xc205, |
| RIL_SLGFI = 0xc204, |
| RIL_XIHF = 0xc006, |
| RIL_XILF = 0xc007, |
| |
| RI_AGHI = 0xa70b, |
| RI_AHI = 0xa70a, |
| RI_BRC = 0xa704, |
| RI_CHI = 0xa70e, |
| RI_CGHI = 0xa70f, |
| RI_IIHH = 0xa500, |
| RI_IIHL = 0xa501, |
| RI_IILH = 0xa502, |
| RI_IILL = 0xa503, |
| RI_LGHI = 0xa709, |
| RI_LLIHH = 0xa50c, |
| RI_LLIHL = 0xa50d, |
| RI_LLILH = 0xa50e, |
| RI_LLILL = 0xa50f, |
| RI_MGHI = 0xa70d, |
| RI_MHI = 0xa70c, |
| RI_NIHH = 0xa504, |
| RI_NIHL = 0xa505, |
| RI_NILH = 0xa506, |
| RI_NILL = 0xa507, |
| RI_OIHH = 0xa508, |
| RI_OIHL = 0xa509, |
| RI_OILH = 0xa50a, |
| RI_OILL = 0xa50b, |
| |
| RIE_CGIJ = 0xec7c, |
| RIE_CGRJ = 0xec64, |
| RIE_CIJ = 0xec7e, |
| RIE_CLGRJ = 0xec65, |
| RIE_CLIJ = 0xec7f, |
| RIE_CLGIJ = 0xec7d, |
| RIE_CLRJ = 0xec77, |
| RIE_CRJ = 0xec76, |
| RIE_LOCGHI = 0xec46, |
| RIE_RISBG = 0xec55, |
| |
| RRE_AGR = 0xb908, |
| RRE_ALGR = 0xb90a, |
| RRE_ALCR = 0xb998, |
| RRE_ALCGR = 0xb988, |
| RRE_CGR = 0xb920, |
| RRE_CLGR = 0xb921, |
| RRE_DLGR = 0xb987, |
| RRE_DLR = 0xb997, |
| RRE_DSGFR = 0xb91d, |
| RRE_DSGR = 0xb90d, |
| RRE_FLOGR = 0xb983, |
| RRE_LGBR = 0xb906, |
| RRE_LCGR = 0xb903, |
| RRE_LGFR = 0xb914, |
| RRE_LGHR = 0xb907, |
| RRE_LGR = 0xb904, |
| RRE_LLGCR = 0xb984, |
| RRE_LLGFR = 0xb916, |
| RRE_LLGHR = 0xb985, |
| RRE_LRVR = 0xb91f, |
| RRE_LRVGR = 0xb90f, |
| RRE_LTGR = 0xb902, |
| RRE_MLGR = 0xb986, |
| RRE_MSGR = 0xb90c, |
| RRE_MSR = 0xb252, |
| RRE_NGR = 0xb980, |
| RRE_OGR = 0xb981, |
| RRE_SGR = 0xb909, |
| RRE_SLGR = 0xb90b, |
| RRE_SLBR = 0xb999, |
| RRE_SLBGR = 0xb989, |
| RRE_XGR = 0xb982, |
| |
| RRF_LOCR = 0xb9f2, |
| RRF_LOCGR = 0xb9e2, |
| RRF_NRK = 0xb9f4, |
| RRF_NGRK = 0xb9e4, |
| RRF_ORK = 0xb9f6, |
| RRF_OGRK = 0xb9e6, |
| RRF_SRK = 0xb9f9, |
| RRF_SGRK = 0xb9e9, |
| RRF_SLRK = 0xb9fb, |
| RRF_SLGRK = 0xb9eb, |
| RRF_XRK = 0xb9f7, |
| RRF_XGRK = 0xb9e7, |
| |
| RR_AR = 0x1a, |
| RR_ALR = 0x1e, |
| RR_BASR = 0x0d, |
| RR_BCR = 0x07, |
| RR_CLR = 0x15, |
| RR_CR = 0x19, |
| RR_DR = 0x1d, |
| RR_LCR = 0x13, |
| RR_LR = 0x18, |
| RR_LTR = 0x12, |
| RR_NR = 0x14, |
| RR_OR = 0x16, |
| RR_SR = 0x1b, |
| RR_SLR = 0x1f, |
| RR_XR = 0x17, |
| |
| RSY_RLL = 0xeb1d, |
| RSY_RLLG = 0xeb1c, |
| RSY_SLLG = 0xeb0d, |
| RSY_SLLK = 0xebdf, |
| RSY_SRAG = 0xeb0a, |
| RSY_SRAK = 0xebdc, |
| RSY_SRLG = 0xeb0c, |
| RSY_SRLK = 0xebde, |
| |
| RS_SLL = 0x89, |
| RS_SRA = 0x8a, |
| RS_SRL = 0x88, |
| |
| RXY_AG = 0xe308, |
| RXY_AY = 0xe35a, |
| RXY_CG = 0xe320, |
| RXY_CLG = 0xe321, |
| RXY_CLY = 0xe355, |
| RXY_CY = 0xe359, |
| RXY_LAY = 0xe371, |
| RXY_LB = 0xe376, |
| RXY_LG = 0xe304, |
| RXY_LGB = 0xe377, |
| RXY_LGF = 0xe314, |
| RXY_LGH = 0xe315, |
| RXY_LHY = 0xe378, |
| RXY_LLGC = 0xe390, |
| RXY_LLGF = 0xe316, |
| RXY_LLGH = 0xe391, |
| RXY_LMG = 0xeb04, |
| RXY_LRV = 0xe31e, |
| RXY_LRVG = 0xe30f, |
| RXY_LRVH = 0xe31f, |
| RXY_LY = 0xe358, |
| RXY_NG = 0xe380, |
| RXY_OG = 0xe381, |
| RXY_STCY = 0xe372, |
| RXY_STG = 0xe324, |
| RXY_STHY = 0xe370, |
| RXY_STMG = 0xeb24, |
| RXY_STRV = 0xe33e, |
| RXY_STRVG = 0xe32f, |
| RXY_STRVH = 0xe33f, |
| RXY_STY = 0xe350, |
| RXY_XG = 0xe382, |
| |
| RX_A = 0x5a, |
| RX_C = 0x59, |
| RX_L = 0x58, |
| RX_LA = 0x41, |
| RX_LH = 0x48, |
| RX_ST = 0x50, |
| RX_STC = 0x42, |
| RX_STH = 0x40, |
| |
| NOP = 0x0707, |
| } S390Opcode; |
| |
| #ifdef CONFIG_DEBUG_TCG |
| static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = { |
| "%r0", "%r1", "%r2", "%r3", "%r4", "%r5", "%r6", "%r7", |
| "%r8", "%r9", "%r10" "%r11" "%r12" "%r13" "%r14" "%r15" |
| }; |
| #endif |
| |
| /* Since R6 is a potential argument register, choose it last of the |
| call-saved registers. Likewise prefer the call-clobbered registers |
| in reverse order to maximize the chance of avoiding the arguments. */ |
| static const int tcg_target_reg_alloc_order[] = { |
| /* Call saved registers. */ |
| TCG_REG_R13, |
| TCG_REG_R12, |
| TCG_REG_R11, |
| TCG_REG_R10, |
| TCG_REG_R9, |
| TCG_REG_R8, |
| TCG_REG_R7, |
| TCG_REG_R6, |
| /* Call clobbered registers. */ |
| TCG_REG_R14, |
| TCG_REG_R0, |
| TCG_REG_R1, |
| /* Argument registers, in reverse order of allocation. */ |
| TCG_REG_R5, |
| TCG_REG_R4, |
| TCG_REG_R3, |
| TCG_REG_R2, |
| }; |
| |
| static const int tcg_target_call_iarg_regs[] = { |
| TCG_REG_R2, |
| TCG_REG_R3, |
| TCG_REG_R4, |
| TCG_REG_R5, |
| TCG_REG_R6, |
| }; |
| |
| static const int tcg_target_call_oarg_regs[] = { |
| TCG_REG_R2, |
| }; |
| |
| #define S390_CC_EQ 8 |
| #define S390_CC_LT 4 |
| #define S390_CC_GT 2 |
| #define S390_CC_OV 1 |
| #define S390_CC_NE (S390_CC_LT | S390_CC_GT) |
| #define S390_CC_LE (S390_CC_LT | S390_CC_EQ) |
| #define S390_CC_GE (S390_CC_GT | S390_CC_EQ) |
| #define S390_CC_NEVER 0 |
| #define S390_CC_ALWAYS 15 |
| |
| /* Condition codes that result from a COMPARE and COMPARE LOGICAL. */ |
| static const uint8_t tcg_cond_to_s390_cond[] = { |
| [TCG_COND_EQ] = S390_CC_EQ, |
| [TCG_COND_NE] = S390_CC_NE, |
| [TCG_COND_LT] = S390_CC_LT, |
| [TCG_COND_LE] = S390_CC_LE, |
| [TCG_COND_GT] = S390_CC_GT, |
| [TCG_COND_GE] = S390_CC_GE, |
| [TCG_COND_LTU] = S390_CC_LT, |
| [TCG_COND_LEU] = S390_CC_LE, |
| [TCG_COND_GTU] = S390_CC_GT, |
| [TCG_COND_GEU] = S390_CC_GE, |
| }; |
| |
| /* Condition codes that result from a LOAD AND TEST. Here, we have no |
| unsigned instruction variation, however since the test is vs zero we |
| can re-map the outcomes appropriately. */ |
| static const uint8_t tcg_cond_to_ltr_cond[] = { |
| [TCG_COND_EQ] = S390_CC_EQ, |
| [TCG_COND_NE] = S390_CC_NE, |
| [TCG_COND_LT] = S390_CC_LT, |
| [TCG_COND_LE] = S390_CC_LE, |
| [TCG_COND_GT] = S390_CC_GT, |
| [TCG_COND_GE] = S390_CC_GE, |
| [TCG_COND_LTU] = S390_CC_NEVER, |
| [TCG_COND_LEU] = S390_CC_EQ, |
| [TCG_COND_GTU] = S390_CC_NE, |
| [TCG_COND_GEU] = S390_CC_ALWAYS, |
| }; |
| |
| #ifdef CONFIG_SOFTMMU |
| static void * const qemu_ld_helpers[16] = { |
| [MO_UB] = helper_ret_ldub_mmu, |
| [MO_SB] = helper_ret_ldsb_mmu, |
| [MO_LEUW] = helper_le_lduw_mmu, |
| [MO_LESW] = helper_le_ldsw_mmu, |
| [MO_LEUL] = helper_le_ldul_mmu, |
| [MO_LESL] = helper_le_ldsl_mmu, |
| [MO_LEQ] = helper_le_ldq_mmu, |
| [MO_BEUW] = helper_be_lduw_mmu, |
| [MO_BESW] = helper_be_ldsw_mmu, |
| [MO_BEUL] = helper_be_ldul_mmu, |
| [MO_BESL] = helper_be_ldsl_mmu, |
| [MO_BEQ] = helper_be_ldq_mmu, |
| }; |
| |
| static void * const qemu_st_helpers[16] = { |
| [MO_UB] = helper_ret_stb_mmu, |
| [MO_LEUW] = helper_le_stw_mmu, |
| [MO_LEUL] = helper_le_stl_mmu, |
| [MO_LEQ] = helper_le_stq_mmu, |
| [MO_BEUW] = helper_be_stw_mmu, |
| [MO_BEUL] = helper_be_stl_mmu, |
| [MO_BEQ] = helper_be_stq_mmu, |
| }; |
| #endif |
| |
| static tcg_insn_unit *tb_ret_addr; |
| uint64_t s390_facilities; |
| |
| static bool patch_reloc(tcg_insn_unit *code_ptr, int type, |
| intptr_t value, intptr_t addend) |
| { |
| intptr_t pcrel2; |
| uint32_t old; |
| |
| value += addend; |
| pcrel2 = (tcg_insn_unit *)value - code_ptr; |
| |
| switch (type) { |
| case R_390_PC16DBL: |
| if (pcrel2 == (int16_t)pcrel2) { |
| tcg_patch16(code_ptr, pcrel2); |
| return true; |
| } |
| break; |
| case R_390_PC32DBL: |
| if (pcrel2 == (int32_t)pcrel2) { |
| tcg_patch32(code_ptr, pcrel2); |
| return true; |
| } |
| break; |
| case R_390_20: |
| if (value == sextract64(value, 0, 20)) { |
| old = *(uint32_t *)code_ptr & 0xf00000ff; |
| old |= ((value & 0xfff) << 16) | ((value & 0xff000) >> 4); |
| tcg_patch32(code_ptr, old); |
| return true; |
| } |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| return false; |
| } |
| |
| /* parse target specific constraints */ |
| static const char *target_parse_constraint(TCGArgConstraint *ct, |
| const char *ct_str, TCGType type) |
| { |
| switch (*ct_str++) { |
| case 'r': /* all registers */ |
| ct->ct |= TCG_CT_REG; |
| ct->u.regs = 0xffff; |
| break; |
| case 'L': /* qemu_ld/st constraint */ |
| ct->ct |= TCG_CT_REG; |
| ct->u.regs = 0xffff; |
| tcg_regset_reset_reg(ct->u.regs, TCG_REG_R2); |
| tcg_regset_reset_reg(ct->u.regs, TCG_REG_R3); |
| tcg_regset_reset_reg(ct->u.regs, TCG_REG_R4); |
| break; |
| case 'a': /* force R2 for division */ |
| ct->ct |= TCG_CT_REG; |
| ct->u.regs = 0; |
| tcg_regset_set_reg(ct->u.regs, TCG_REG_R2); |
| break; |
| case 'b': /* force R3 for division */ |
| ct->ct |= TCG_CT_REG; |
| ct->u.regs = 0; |
| tcg_regset_set_reg(ct->u.regs, TCG_REG_R3); |
| break; |
| case 'A': |
| ct->ct |= TCG_CT_CONST_S33; |
| break; |
| case 'I': |
| ct->ct |= TCG_CT_CONST_S16; |
| break; |
| case 'J': |
| ct->ct |= TCG_CT_CONST_S32; |
| break; |
| case 'Z': |
| ct->ct |= TCG_CT_CONST_ZERO; |
| break; |
| default: |
| return NULL; |
| } |
| return ct_str; |
| } |
| |
| /* Test if a constant matches the constraint. */ |
| static int tcg_target_const_match(tcg_target_long val, TCGType type, |
| const TCGArgConstraint *arg_ct) |
| { |
| int ct = arg_ct->ct; |
| |
| if (ct & TCG_CT_CONST) { |
| return 1; |
| } |
| |
| if (type == TCG_TYPE_I32) { |
| val = (int32_t)val; |
| } |
| |
| /* The following are mutually exclusive. */ |
| if (ct & TCG_CT_CONST_S16) { |
| return val == (int16_t)val; |
| } else if (ct & TCG_CT_CONST_S32) { |
| return val == (int32_t)val; |
| } else if (ct & TCG_CT_CONST_S33) { |
| return val >= -0xffffffffll && val <= 0xffffffffll; |
| } else if (ct & TCG_CT_CONST_ZERO) { |
| return val == 0; |
| } |
| |
| return 0; |
| } |
| |
| /* Emit instructions according to the given instruction format. */ |
| |
| static void tcg_out_insn_RR(TCGContext *s, S390Opcode op, TCGReg r1, TCGReg r2) |
| { |
| tcg_out16(s, (op << 8) | (r1 << 4) | r2); |
| } |
| |
| static void tcg_out_insn_RRE(TCGContext *s, S390Opcode op, |
| TCGReg r1, TCGReg r2) |
| { |
| tcg_out32(s, (op << 16) | (r1 << 4) | r2); |
| } |
| |
| static void tcg_out_insn_RRF(TCGContext *s, S390Opcode op, |
| TCGReg r1, TCGReg r2, int m3) |
| { |
| tcg_out32(s, (op << 16) | (m3 << 12) | (r1 << 4) | r2); |
| } |
| |
| static void tcg_out_insn_RI(TCGContext *s, S390Opcode op, TCGReg r1, int i2) |
| { |
| tcg_out32(s, (op << 16) | (r1 << 20) | (i2 & 0xffff)); |
| } |
| |
| static void tcg_out_insn_RIE(TCGContext *s, S390Opcode op, TCGReg r1, |
| int i2, int m3) |
| { |
| tcg_out16(s, (op & 0xff00) | (r1 << 4) | m3); |
| tcg_out32(s, (i2 << 16) | (op & 0xff)); |
| } |
| |
| static void tcg_out_insn_RIL(TCGContext *s, S390Opcode op, TCGReg r1, int i2) |
| { |
| tcg_out16(s, op | (r1 << 4)); |
| tcg_out32(s, i2); |
| } |
| |
| static void tcg_out_insn_RS(TCGContext *s, S390Opcode op, TCGReg r1, |
| TCGReg b2, TCGReg r3, int disp) |
| { |
| tcg_out32(s, (op << 24) | (r1 << 20) | (r3 << 16) | (b2 << 12) |
| | (disp & 0xfff)); |
| } |
| |
| static void tcg_out_insn_RSY(TCGContext *s, S390Opcode op, TCGReg r1, |
| TCGReg b2, TCGReg r3, int disp) |
| { |
| tcg_out16(s, (op & 0xff00) | (r1 << 4) | r3); |
| tcg_out32(s, (op & 0xff) | (b2 << 28) |
| | ((disp & 0xfff) << 16) | ((disp & 0xff000) >> 4)); |
| } |
| |
| #define tcg_out_insn_RX tcg_out_insn_RS |
| #define tcg_out_insn_RXY tcg_out_insn_RSY |
| |
| /* Emit an opcode with "type-checking" of the format. */ |
| #define tcg_out_insn(S, FMT, OP, ...) \ |
| glue(tcg_out_insn_,FMT)(S, glue(glue(FMT,_),OP), ## __VA_ARGS__) |
| |
| |
| /* emit 64-bit shifts */ |
| static void tcg_out_sh64(TCGContext* s, S390Opcode op, TCGReg dest, |
| TCGReg src, TCGReg sh_reg, int sh_imm) |
| { |
| tcg_out_insn_RSY(s, op, dest, sh_reg, src, sh_imm); |
| } |
| |
| /* emit 32-bit shifts */ |
| static void tcg_out_sh32(TCGContext* s, S390Opcode op, TCGReg dest, |
| TCGReg sh_reg, int sh_imm) |
| { |
| tcg_out_insn_RS(s, op, dest, sh_reg, 0, sh_imm); |
| } |
| |
| static void tcg_out_mov(TCGContext *s, TCGType type, TCGReg dst, TCGReg src) |
| { |
| if (src != dst) { |
| if (type == TCG_TYPE_I32) { |
| tcg_out_insn(s, RR, LR, dst, src); |
| } else { |
| tcg_out_insn(s, RRE, LGR, dst, src); |
| } |
| } |
| } |
| |
| static const S390Opcode lli_insns[4] = { |
| RI_LLILL, RI_LLILH, RI_LLIHL, RI_LLIHH |
| }; |
| |
| static bool maybe_out_small_movi(TCGContext *s, TCGType type, |
| TCGReg ret, tcg_target_long sval) |
| { |
| tcg_target_ulong uval = sval; |
| int i; |
| |
| if (type == TCG_TYPE_I32) { |
| uval = (uint32_t)sval; |
| sval = (int32_t)sval; |
| } |
| |
| /* Try all 32-bit insns that can load it in one go. */ |
| if (sval >= -0x8000 && sval < 0x8000) { |
| tcg_out_insn(s, RI, LGHI, ret, sval); |
| return true; |
| } |
| |
| for (i = 0; i < 4; i++) { |
| tcg_target_long mask = 0xffffull << i*16; |
| if ((uval & mask) == uval) { |
| tcg_out_insn_RI(s, lli_insns[i], ret, uval >> i*16); |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| /* load a register with an immediate value */ |
| static void tcg_out_movi_int(TCGContext *s, TCGType type, TCGReg ret, |
| tcg_target_long sval, bool in_prologue) |
| { |
| tcg_target_ulong uval; |
| |
| /* Try all 32-bit insns that can load it in one go. */ |
| if (maybe_out_small_movi(s, type, ret, sval)) { |
| return; |
| } |
| |
| uval = sval; |
| if (type == TCG_TYPE_I32) { |
| uval = (uint32_t)sval; |
| sval = (int32_t)sval; |
| } |
| |
| /* Try all 48-bit insns that can load it in one go. */ |
| if (s390_facilities & FACILITY_EXT_IMM) { |
| if (sval == (int32_t)sval) { |
| tcg_out_insn(s, RIL, LGFI, ret, sval); |
| return; |
| } |
| if (uval <= 0xffffffff) { |
| tcg_out_insn(s, RIL, LLILF, ret, uval); |
| return; |
| } |
| if ((uval & 0xffffffff) == 0) { |
| tcg_out_insn(s, RIL, LLIHF, ret, uval >> 32); |
| return; |
| } |
| } |
| |
| /* Try for PC-relative address load. For odd addresses, |
| attempt to use an offset from the start of the TB. */ |
| if ((sval & 1) == 0) { |
| ptrdiff_t off = tcg_pcrel_diff(s, (void *)sval) >> 1; |
| if (off == (int32_t)off) { |
| tcg_out_insn(s, RIL, LARL, ret, off); |
| return; |
| } |
| } else if (USE_REG_TB && !in_prologue) { |
| ptrdiff_t off = sval - (uintptr_t)s->code_gen_ptr; |
| if (off == sextract64(off, 0, 20)) { |
| /* This is certain to be an address within TB, and therefore |
| OFF will be negative; don't try RX_LA. */ |
| tcg_out_insn(s, RXY, LAY, ret, TCG_REG_TB, TCG_REG_NONE, off); |
| return; |
| } |
| } |
| |
| /* A 32-bit unsigned value can be loaded in 2 insns. And given |
| that LLILL, LLIHL, LLILF above did not succeed, we know that |
| both insns are required. */ |
| if (uval <= 0xffffffff) { |
| tcg_out_insn(s, RI, LLILL, ret, uval); |
| tcg_out_insn(s, RI, IILH, ret, uval >> 16); |
| return; |
| } |
| |
| /* Otherwise, stuff it in the constant pool. */ |
| if (s390_facilities & FACILITY_GEN_INST_EXT) { |
| tcg_out_insn(s, RIL, LGRL, ret, 0); |
| new_pool_label(s, sval, R_390_PC32DBL, s->code_ptr - 2, 2); |
| } else if (USE_REG_TB && !in_prologue) { |
| tcg_out_insn(s, RXY, LG, ret, TCG_REG_TB, TCG_REG_NONE, 0); |
| new_pool_label(s, sval, R_390_20, s->code_ptr - 2, |
| -(intptr_t)s->code_gen_ptr); |
| } else { |
| TCGReg base = ret ? ret : TCG_TMP0; |
| tcg_out_insn(s, RIL, LARL, base, 0); |
| new_pool_label(s, sval, R_390_PC32DBL, s->code_ptr - 2, 2); |
| tcg_out_insn(s, RXY, LG, ret, base, TCG_REG_NONE, 0); |
| } |
| } |
| |
| static void tcg_out_movi(TCGContext *s, TCGType type, |
| TCGReg ret, tcg_target_long sval) |
| { |
| tcg_out_movi_int(s, type, ret, sval, false); |
| } |
| |
| /* Emit a load/store type instruction. Inputs are: |
| DATA: The register to be loaded or stored. |
| BASE+OFS: The effective address. |
| OPC_RX: If the operation has an RX format opcode (e.g. STC), otherwise 0. |
| OPC_RXY: The RXY format opcode for the operation (e.g. STCY). */ |
| |
| static void tcg_out_mem(TCGContext *s, S390Opcode opc_rx, S390Opcode opc_rxy, |
| TCGReg data, TCGReg base, TCGReg index, |
| tcg_target_long ofs) |
| { |
| if (ofs < -0x80000 || ofs >= 0x80000) { |
| /* Combine the low 20 bits of the offset with the actual load insn; |
| the high 44 bits must come from an immediate load. */ |
| tcg_target_long low = ((ofs & 0xfffff) ^ 0x80000) - 0x80000; |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, ofs - low); |
| ofs = low; |
| |
| /* If we were already given an index register, add it in. */ |
| if (index != TCG_REG_NONE) { |
| tcg_out_insn(s, RRE, AGR, TCG_TMP0, index); |
| } |
| index = TCG_TMP0; |
| } |
| |
| if (opc_rx && ofs >= 0 && ofs < 0x1000) { |
| tcg_out_insn_RX(s, opc_rx, data, base, index, ofs); |
| } else { |
| tcg_out_insn_RXY(s, opc_rxy, data, base, index, ofs); |
| } |
| } |
| |
| |
| /* load data without address translation or endianness conversion */ |
| static inline void tcg_out_ld(TCGContext *s, TCGType type, TCGReg data, |
| TCGReg base, intptr_t ofs) |
| { |
| if (type == TCG_TYPE_I32) { |
| tcg_out_mem(s, RX_L, RXY_LY, data, base, TCG_REG_NONE, ofs); |
| } else { |
| tcg_out_mem(s, 0, RXY_LG, data, base, TCG_REG_NONE, ofs); |
| } |
| } |
| |
| static inline void tcg_out_st(TCGContext *s, TCGType type, TCGReg data, |
| TCGReg base, intptr_t ofs) |
| { |
| if (type == TCG_TYPE_I32) { |
| tcg_out_mem(s, RX_ST, RXY_STY, data, base, TCG_REG_NONE, ofs); |
| } else { |
| tcg_out_mem(s, 0, RXY_STG, data, base, TCG_REG_NONE, ofs); |
| } |
| } |
| |
| static inline bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val, |
| TCGReg base, intptr_t ofs) |
| { |
| return false; |
| } |
| |
| /* load data from an absolute host address */ |
| static void tcg_out_ld_abs(TCGContext *s, TCGType type, TCGReg dest, void *abs) |
| { |
| intptr_t addr = (intptr_t)abs; |
| |
| if ((s390_facilities & FACILITY_GEN_INST_EXT) && !(addr & 1)) { |
| ptrdiff_t disp = tcg_pcrel_diff(s, abs) >> 1; |
| if (disp == (int32_t)disp) { |
| if (type == TCG_TYPE_I32) { |
| tcg_out_insn(s, RIL, LRL, dest, disp); |
| } else { |
| tcg_out_insn(s, RIL, LGRL, dest, disp); |
| } |
| return; |
| } |
| } |
| if (USE_REG_TB) { |
| ptrdiff_t disp = abs - (void *)s->code_gen_ptr; |
| if (disp == sextract64(disp, 0, 20)) { |
| tcg_out_ld(s, type, dest, TCG_REG_TB, disp); |
| return; |
| } |
| } |
| |
| tcg_out_movi(s, TCG_TYPE_PTR, dest, addr & ~0xffff); |
| tcg_out_ld(s, type, dest, dest, addr & 0xffff); |
| } |
| |
| static inline void tcg_out_risbg(TCGContext *s, TCGReg dest, TCGReg src, |
| int msb, int lsb, int ofs, int z) |
| { |
| /* Format RIE-f */ |
| tcg_out16(s, (RIE_RISBG & 0xff00) | (dest << 4) | src); |
| tcg_out16(s, (msb << 8) | (z << 7) | lsb); |
| tcg_out16(s, (ofs << 8) | (RIE_RISBG & 0xff)); |
| } |
| |
| static void tgen_ext8s(TCGContext *s, TCGType type, TCGReg dest, TCGReg src) |
| { |
| if (s390_facilities & FACILITY_EXT_IMM) { |
| tcg_out_insn(s, RRE, LGBR, dest, src); |
| return; |
| } |
| |
| if (type == TCG_TYPE_I32) { |
| if (dest == src) { |
| tcg_out_sh32(s, RS_SLL, dest, TCG_REG_NONE, 24); |
| } else { |
| tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 24); |
| } |
| tcg_out_sh32(s, RS_SRA, dest, TCG_REG_NONE, 24); |
| } else { |
| tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 56); |
| tcg_out_sh64(s, RSY_SRAG, dest, dest, TCG_REG_NONE, 56); |
| } |
| } |
| |
| static void tgen_ext8u(TCGContext *s, TCGType type, TCGReg dest, TCGReg src) |
| { |
| if (s390_facilities & FACILITY_EXT_IMM) { |
| tcg_out_insn(s, RRE, LLGCR, dest, src); |
| return; |
| } |
| |
| if (dest == src) { |
| tcg_out_movi(s, type, TCG_TMP0, 0xff); |
| src = TCG_TMP0; |
| } else { |
| tcg_out_movi(s, type, dest, 0xff); |
| } |
| if (type == TCG_TYPE_I32) { |
| tcg_out_insn(s, RR, NR, dest, src); |
| } else { |
| tcg_out_insn(s, RRE, NGR, dest, src); |
| } |
| } |
| |
| static void tgen_ext16s(TCGContext *s, TCGType type, TCGReg dest, TCGReg src) |
| { |
| if (s390_facilities & FACILITY_EXT_IMM) { |
| tcg_out_insn(s, RRE, LGHR, dest, src); |
| return; |
| } |
| |
| if (type == TCG_TYPE_I32) { |
| if (dest == src) { |
| tcg_out_sh32(s, RS_SLL, dest, TCG_REG_NONE, 16); |
| } else { |
| tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 16); |
| } |
| tcg_out_sh32(s, RS_SRA, dest, TCG_REG_NONE, 16); |
| } else { |
| tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 48); |
| tcg_out_sh64(s, RSY_SRAG, dest, dest, TCG_REG_NONE, 48); |
| } |
| } |
| |
| static void tgen_ext16u(TCGContext *s, TCGType type, TCGReg dest, TCGReg src) |
| { |
| if (s390_facilities & FACILITY_EXT_IMM) { |
| tcg_out_insn(s, RRE, LLGHR, dest, src); |
| return; |
| } |
| |
| if (dest == src) { |
| tcg_out_movi(s, type, TCG_TMP0, 0xffff); |
| src = TCG_TMP0; |
| } else { |
| tcg_out_movi(s, type, dest, 0xffff); |
| } |
| if (type == TCG_TYPE_I32) { |
| tcg_out_insn(s, RR, NR, dest, src); |
| } else { |
| tcg_out_insn(s, RRE, NGR, dest, src); |
| } |
| } |
| |
| static inline void tgen_ext32s(TCGContext *s, TCGReg dest, TCGReg src) |
| { |
| tcg_out_insn(s, RRE, LGFR, dest, src); |
| } |
| |
| static inline void tgen_ext32u(TCGContext *s, TCGReg dest, TCGReg src) |
| { |
| tcg_out_insn(s, RRE, LLGFR, dest, src); |
| } |
| |
| /* Accept bit patterns like these: |
| 0....01....1 |
| 1....10....0 |
| 1..10..01..1 |
| 0..01..10..0 |
| Copied from gcc sources. */ |
| static inline bool risbg_mask(uint64_t c) |
| { |
| uint64_t lsb; |
| /* We don't change the number of transitions by inverting, |
| so make sure we start with the LSB zero. */ |
| if (c & 1) { |
| c = ~c; |
| } |
| /* Reject all zeros or all ones. */ |
| if (c == 0) { |
| return false; |
| } |
| /* Find the first transition. */ |
| lsb = c & -c; |
| /* Invert to look for a second transition. */ |
| c = ~c; |
| /* Erase the first transition. */ |
| c &= -lsb; |
| /* Find the second transition, if any. */ |
| lsb = c & -c; |
| /* Match if all the bits are 1's, or if c is zero. */ |
| return c == -lsb; |
| } |
| |
| static void tgen_andi_risbg(TCGContext *s, TCGReg out, TCGReg in, uint64_t val) |
| { |
| int msb, lsb; |
| if ((val & 0x8000000000000001ull) == 0x8000000000000001ull) { |
| /* Achieve wraparound by swapping msb and lsb. */ |
| msb = 64 - ctz64(~val); |
| lsb = clz64(~val) - 1; |
| } else { |
| msb = clz64(val); |
| lsb = 63 - ctz64(val); |
| } |
| tcg_out_risbg(s, out, in, msb, lsb, 0, 1); |
| } |
| |
| static void tgen_andi(TCGContext *s, TCGType type, TCGReg dest, uint64_t val) |
| { |
| static const S390Opcode ni_insns[4] = { |
| RI_NILL, RI_NILH, RI_NIHL, RI_NIHH |
| }; |
| static const S390Opcode nif_insns[2] = { |
| RIL_NILF, RIL_NIHF |
| }; |
| uint64_t valid = (type == TCG_TYPE_I32 ? 0xffffffffull : -1ull); |
| int i; |
| |
| /* Look for the zero-extensions. */ |
| if ((val & valid) == 0xffffffff) { |
| tgen_ext32u(s, dest, dest); |
| return; |
| } |
| if (s390_facilities & FACILITY_EXT_IMM) { |
| if ((val & valid) == 0xff) { |
| tgen_ext8u(s, TCG_TYPE_I64, dest, dest); |
| return; |
| } |
| if ((val & valid) == 0xffff) { |
| tgen_ext16u(s, TCG_TYPE_I64, dest, dest); |
| return; |
| } |
| } |
| |
| /* Try all 32-bit insns that can perform it in one go. */ |
| for (i = 0; i < 4; i++) { |
| tcg_target_ulong mask = ~(0xffffull << i*16); |
| if (((val | ~valid) & mask) == mask) { |
| tcg_out_insn_RI(s, ni_insns[i], dest, val >> i*16); |
| return; |
| } |
| } |
| |
| /* Try all 48-bit insns that can perform it in one go. */ |
| if (s390_facilities & FACILITY_EXT_IMM) { |
| for (i = 0; i < 2; i++) { |
| tcg_target_ulong mask = ~(0xffffffffull << i*32); |
| if (((val | ~valid) & mask) == mask) { |
| tcg_out_insn_RIL(s, nif_insns[i], dest, val >> i*32); |
| return; |
| } |
| } |
| } |
| if ((s390_facilities & FACILITY_GEN_INST_EXT) && risbg_mask(val)) { |
| tgen_andi_risbg(s, dest, dest, val); |
| return; |
| } |
| |
| /* Use the constant pool if USE_REG_TB, but not for small constants. */ |
| if (USE_REG_TB) { |
| if (!maybe_out_small_movi(s, type, TCG_TMP0, val)) { |
| tcg_out_insn(s, RXY, NG, dest, TCG_REG_TB, TCG_REG_NONE, 0); |
| new_pool_label(s, val & valid, R_390_20, s->code_ptr - 2, |
| -(intptr_t)s->code_gen_ptr); |
| return; |
| } |
| } else { |
| tcg_out_movi(s, type, TCG_TMP0, val); |
| } |
| if (type == TCG_TYPE_I32) { |
| tcg_out_insn(s, RR, NR, dest, TCG_TMP0); |
| } else { |
| tcg_out_insn(s, RRE, NGR, dest, TCG_TMP0); |
| } |
| } |
| |
| static void tgen_ori(TCGContext *s, TCGType type, TCGReg dest, uint64_t val) |
| { |
| static const S390Opcode oi_insns[4] = { |
| RI_OILL, RI_OILH, RI_OIHL, RI_OIHH |
| }; |
| static const S390Opcode oif_insns[2] = { |
| RIL_OILF, RIL_OIHF |
| }; |
| |
| int i; |
| |
| /* Look for no-op. */ |
| if (unlikely(val == 0)) { |
| return; |
| } |
| |
| /* Try all 32-bit insns that can perform it in one go. */ |
| for (i = 0; i < 4; i++) { |
| tcg_target_ulong mask = (0xffffull << i*16); |
| if ((val & mask) != 0 && (val & ~mask) == 0) { |
| tcg_out_insn_RI(s, oi_insns[i], dest, val >> i*16); |
| return; |
| } |
| } |
| |
| /* Try all 48-bit insns that can perform it in one go. */ |
| if (s390_facilities & FACILITY_EXT_IMM) { |
| for (i = 0; i < 2; i++) { |
| tcg_target_ulong mask = (0xffffffffull << i*32); |
| if ((val & mask) != 0 && (val & ~mask) == 0) { |
| tcg_out_insn_RIL(s, oif_insns[i], dest, val >> i*32); |
| return; |
| } |
| } |
| } |
| |
| /* Use the constant pool if USE_REG_TB, but not for small constants. */ |
| if (maybe_out_small_movi(s, type, TCG_TMP0, val)) { |
| if (type == TCG_TYPE_I32) { |
| tcg_out_insn(s, RR, OR, dest, TCG_TMP0); |
| } else { |
| tcg_out_insn(s, RRE, OGR, dest, TCG_TMP0); |
| } |
| } else if (USE_REG_TB) { |
| tcg_out_insn(s, RXY, OG, dest, TCG_REG_TB, TCG_REG_NONE, 0); |
| new_pool_label(s, val, R_390_20, s->code_ptr - 2, |
| -(intptr_t)s->code_gen_ptr); |
| } else { |
| /* Perform the OR via sequential modifications to the high and |
| low parts. Do this via recursion to handle 16-bit vs 32-bit |
| masks in each half. */ |
| tcg_debug_assert(s390_facilities & FACILITY_EXT_IMM); |
| tgen_ori(s, type, dest, val & 0x00000000ffffffffull); |
| tgen_ori(s, type, dest, val & 0xffffffff00000000ull); |
| } |
| } |
| |
| static void tgen_xori(TCGContext *s, TCGType type, TCGReg dest, uint64_t val) |
| { |
| /* Try all 48-bit insns that can perform it in one go. */ |
| if (s390_facilities & FACILITY_EXT_IMM) { |
| if ((val & 0xffffffff00000000ull) == 0) { |
| tcg_out_insn(s, RIL, XILF, dest, val); |
| return; |
| } |
| if ((val & 0x00000000ffffffffull) == 0) { |
| tcg_out_insn(s, RIL, XIHF, dest, val >> 32); |
| return; |
| } |
| } |
| |
| /* Use the constant pool if USE_REG_TB, but not for small constants. */ |
| if (maybe_out_small_movi(s, type, TCG_TMP0, val)) { |
| if (type == TCG_TYPE_I32) { |
| tcg_out_insn(s, RR, XR, dest, TCG_TMP0); |
| } else { |
| tcg_out_insn(s, RRE, XGR, dest, TCG_TMP0); |
| } |
| } else if (USE_REG_TB) { |
| tcg_out_insn(s, RXY, XG, dest, TCG_REG_TB, TCG_REG_NONE, 0); |
| new_pool_label(s, val, R_390_20, s->code_ptr - 2, |
| -(intptr_t)s->code_gen_ptr); |
| } else { |
| /* Perform the xor by parts. */ |
| tcg_debug_assert(s390_facilities & FACILITY_EXT_IMM); |
| if (val & 0xffffffff) { |
| tcg_out_insn(s, RIL, XILF, dest, val); |
| } |
| if (val > 0xffffffff) { |
| tcg_out_insn(s, RIL, XIHF, dest, val >> 32); |
| } |
| } |
| } |
| |
| static int tgen_cmp(TCGContext *s, TCGType type, TCGCond c, TCGReg r1, |
| TCGArg c2, bool c2const, bool need_carry) |
| { |
| bool is_unsigned = is_unsigned_cond(c); |
| S390Opcode op; |
| |
| if (c2const) { |
| if (c2 == 0) { |
| if (!(is_unsigned && need_carry)) { |
| if (type == TCG_TYPE_I32) { |
| tcg_out_insn(s, RR, LTR, r1, r1); |
| } else { |
| tcg_out_insn(s, RRE, LTGR, r1, r1); |
| } |
| return tcg_cond_to_ltr_cond[c]; |
| } |
| } |
| |
| if (!is_unsigned && c2 == (int16_t)c2) { |
| op = (type == TCG_TYPE_I32 ? RI_CHI : RI_CGHI); |
| tcg_out_insn_RI(s, op, r1, c2); |
| goto exit; |
| } |
| |
| if (s390_facilities & FACILITY_EXT_IMM) { |
| if (type == TCG_TYPE_I32) { |
| op = (is_unsigned ? RIL_CLFI : RIL_CFI); |
| tcg_out_insn_RIL(s, op, r1, c2); |
| goto exit; |
| } else if (c2 == (is_unsigned ? (uint32_t)c2 : (int32_t)c2)) { |
| op = (is_unsigned ? RIL_CLGFI : RIL_CGFI); |
| tcg_out_insn_RIL(s, op, r1, c2); |
| goto exit; |
| } |
| } |
| |
| /* Use the constant pool, but not for small constants. */ |
| if (maybe_out_small_movi(s, type, TCG_TMP0, c2)) { |
| c2 = TCG_TMP0; |
| /* fall through to reg-reg */ |
| } else if (USE_REG_TB) { |
| if (type == TCG_TYPE_I32) { |
| op = (is_unsigned ? RXY_CLY : RXY_CY); |
| tcg_out_insn_RXY(s, op, r1, TCG_REG_TB, TCG_REG_NONE, 0); |
| new_pool_label(s, (uint32_t)c2, R_390_20, s->code_ptr - 2, |
| 4 - (intptr_t)s->code_gen_ptr); |
| } else { |
| op = (is_unsigned ? RXY_CLG : RXY_CG); |
| tcg_out_insn_RXY(s, op, r1, TCG_REG_TB, TCG_REG_NONE, 0); |
| new_pool_label(s, c2, R_390_20, s->code_ptr - 2, |
| -(intptr_t)s->code_gen_ptr); |
| } |
| goto exit; |
| } else { |
| if (type == TCG_TYPE_I32) { |
| op = (is_unsigned ? RIL_CLRL : RIL_CRL); |
| tcg_out_insn_RIL(s, op, r1, 0); |
| new_pool_label(s, (uint32_t)c2, R_390_PC32DBL, |
| s->code_ptr - 2, 2 + 4); |
| } else { |
| op = (is_unsigned ? RIL_CLGRL : RIL_CGRL); |
| tcg_out_insn_RIL(s, op, r1, 0); |
| new_pool_label(s, c2, R_390_PC32DBL, s->code_ptr - 2, 2); |
| } |
| goto exit; |
| } |
| } |
| |
| if (type == TCG_TYPE_I32) { |
| op = (is_unsigned ? RR_CLR : RR_CR); |
| tcg_out_insn_RR(s, op, r1, c2); |
| } else { |
| op = (is_unsigned ? RRE_CLGR : RRE_CGR); |
| tcg_out_insn_RRE(s, op, r1, c2); |
| } |
| |
| exit: |
| return tcg_cond_to_s390_cond[c]; |
| } |
| |
| static void tgen_setcond(TCGContext *s, TCGType type, TCGCond cond, |
| TCGReg dest, TCGReg c1, TCGArg c2, int c2const) |
| { |
| int cc; |
| bool have_loc; |
| |
| /* With LOC2, we can always emit the minimum 3 insns. */ |
| if (s390_facilities & FACILITY_LOAD_ON_COND2) { |
| /* Emit: d = 0, d = (cc ? 1 : d). */ |
| cc = tgen_cmp(s, type, cond, c1, c2, c2const, false); |
| tcg_out_movi(s, TCG_TYPE_I64, dest, 0); |
| tcg_out_insn(s, RIE, LOCGHI, dest, 1, cc); |
| return; |
| } |
| |
| have_loc = (s390_facilities & FACILITY_LOAD_ON_COND) != 0; |
| |
| /* For HAVE_LOC, only the paths through GTU/GT/LEU/LE are smaller. */ |
| restart: |
| switch (cond) { |
| case TCG_COND_NE: |
| /* X != 0 is X > 0. */ |
| if (c2const && c2 == 0) { |
| cond = TCG_COND_GTU; |
| } else { |
| break; |
| } |
| /* fallthru */ |
| |
| case TCG_COND_GTU: |
| case TCG_COND_GT: |
| /* The result of a compare has CC=2 for GT and CC=3 unused. |
| ADD LOGICAL WITH CARRY considers (CC & 2) the carry bit. */ |
| tgen_cmp(s, type, cond, c1, c2, c2const, true); |
| tcg_out_movi(s, type, dest, 0); |
| tcg_out_insn(s, RRE, ALCGR, dest, dest); |
| return; |
| |
| case TCG_COND_EQ: |
| /* X == 0 is X <= 0. */ |
| if (c2const && c2 == 0) { |
| cond = TCG_COND_LEU; |
| } else { |
| break; |
| } |
| /* fallthru */ |
| |
| case TCG_COND_LEU: |
| case TCG_COND_LE: |
| /* As above, but we're looking for borrow, or !carry. |
| The second insn computes d - d - borrow, or -1 for true |
| and 0 for false. So we must mask to 1 bit afterward. */ |
| tgen_cmp(s, type, cond, c1, c2, c2const, true); |
| tcg_out_insn(s, RRE, SLBGR, dest, dest); |
| tgen_andi(s, type, dest, 1); |
| return; |
| |
| case TCG_COND_GEU: |
| case TCG_COND_LTU: |
| case TCG_COND_LT: |
| case TCG_COND_GE: |
| /* Swap operands so that we can use LEU/GTU/GT/LE. */ |
| if (c2const) { |
| if (have_loc) { |
| break; |
| } |
| tcg_out_movi(s, type, TCG_TMP0, c2); |
| c2 = c1; |
| c2const = 0; |
| c1 = TCG_TMP0; |
| } else { |
| TCGReg t = c1; |
| c1 = c2; |
| c2 = t; |
| } |
| cond = tcg_swap_cond(cond); |
| goto restart; |
| |
| default: |
| g_assert_not_reached(); |
| } |
| |
| cc = tgen_cmp(s, type, cond, c1, c2, c2const, false); |
| if (have_loc) { |
| /* Emit: d = 0, t = 1, d = (cc ? t : d). */ |
| tcg_out_movi(s, TCG_TYPE_I64, dest, 0); |
| tcg_out_movi(s, TCG_TYPE_I64, TCG_TMP0, 1); |
| tcg_out_insn(s, RRF, LOCGR, dest, TCG_TMP0, cc); |
| } else { |
| /* Emit: d = 1; if (cc) goto over; d = 0; over: */ |
| tcg_out_movi(s, type, dest, 1); |
| tcg_out_insn(s, RI, BRC, cc, (4 + 4) >> 1); |
| tcg_out_movi(s, type, dest, 0); |
| } |
| } |
| |
| static void tgen_movcond(TCGContext *s, TCGType type, TCGCond c, TCGReg dest, |
| TCGReg c1, TCGArg c2, int c2const, |
| TCGArg v3, int v3const) |
| { |
| int cc; |
| if (s390_facilities & FACILITY_LOAD_ON_COND) { |
| cc = tgen_cmp(s, type, c, c1, c2, c2const, false); |
| if (v3const) { |
| tcg_out_insn(s, RIE, LOCGHI, dest, v3, cc); |
| } else { |
| tcg_out_insn(s, RRF, LOCGR, dest, v3, cc); |
| } |
| } else { |
| c = tcg_invert_cond(c); |
| cc = tgen_cmp(s, type, c, c1, c2, c2const, false); |
| |
| /* Emit: if (cc) goto over; dest = r3; over: */ |
| tcg_out_insn(s, RI, BRC, cc, (4 + 4) >> 1); |
| tcg_out_insn(s, RRE, LGR, dest, v3); |
| } |
| } |
| |
| static void tgen_clz(TCGContext *s, TCGReg dest, TCGReg a1, |
| TCGArg a2, int a2const) |
| { |
| /* Since this sets both R and R+1, we have no choice but to store the |
| result into R0, allowing R1 == TCG_TMP0 to be clobbered as well. */ |
| QEMU_BUILD_BUG_ON(TCG_TMP0 != TCG_REG_R1); |
| tcg_out_insn(s, RRE, FLOGR, TCG_REG_R0, a1); |
| |
| if (a2const && a2 == 64) { |
| tcg_out_mov(s, TCG_TYPE_I64, dest, TCG_REG_R0); |
| } else { |
| if (a2const) { |
| tcg_out_movi(s, TCG_TYPE_I64, dest, a2); |
| } else { |
| tcg_out_mov(s, TCG_TYPE_I64, dest, a2); |
| } |
| if (s390_facilities & FACILITY_LOAD_ON_COND) { |
| /* Emit: if (one bit found) dest = r0. */ |
| tcg_out_insn(s, RRF, LOCGR, dest, TCG_REG_R0, 2); |
| } else { |
| /* Emit: if (no one bit found) goto over; dest = r0; over: */ |
| tcg_out_insn(s, RI, BRC, 8, (4 + 4) >> 1); |
| tcg_out_insn(s, RRE, LGR, dest, TCG_REG_R0); |
| } |
| } |
| } |
| |
| static void tgen_deposit(TCGContext *s, TCGReg dest, TCGReg src, |
| int ofs, int len, int z) |
| { |
| int lsb = (63 - ofs); |
| int msb = lsb - (len - 1); |
| tcg_out_risbg(s, dest, src, msb, lsb, ofs, z); |
| } |
| |
| static void tgen_extract(TCGContext *s, TCGReg dest, TCGReg src, |
| int ofs, int len) |
| { |
| tcg_out_risbg(s, dest, src, 64 - len, 63, 64 - ofs, 1); |
| } |
| |
| static void tgen_gotoi(TCGContext *s, int cc, tcg_insn_unit *dest) |
| { |
| ptrdiff_t off = dest - s->code_ptr; |
| if (off == (int16_t)off) { |
| tcg_out_insn(s, RI, BRC, cc, off); |
| } else if (off == (int32_t)off) { |
| tcg_out_insn(s, RIL, BRCL, cc, off); |
| } else { |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, (uintptr_t)dest); |
| tcg_out_insn(s, RR, BCR, cc, TCG_TMP0); |
| } |
| } |
| |
| static void tgen_branch(TCGContext *s, int cc, TCGLabel *l) |
| { |
| if (l->has_value) { |
| tgen_gotoi(s, cc, l->u.value_ptr); |
| } else if (USE_LONG_BRANCHES) { |
| tcg_out16(s, RIL_BRCL | (cc << 4)); |
| tcg_out_reloc(s, s->code_ptr, R_390_PC32DBL, l, 2); |
| s->code_ptr += 2; |
| } else { |
| tcg_out16(s, RI_BRC | (cc << 4)); |
| tcg_out_reloc(s, s->code_ptr, R_390_PC16DBL, l, 2); |
| s->code_ptr += 1; |
| } |
| } |
| |
| static void tgen_compare_branch(TCGContext *s, S390Opcode opc, int cc, |
| TCGReg r1, TCGReg r2, TCGLabel *l) |
| { |
| intptr_t off = 0; |
| |
| if (l->has_value) { |
| off = l->u.value_ptr - s->code_ptr; |
| tcg_debug_assert(off == (int16_t)off); |
| } else { |
| tcg_out_reloc(s, s->code_ptr + 1, R_390_PC16DBL, l, 2); |
| } |
| |
| tcg_out16(s, (opc & 0xff00) | (r1 << 4) | r2); |
| tcg_out16(s, off); |
| tcg_out16(s, cc << 12 | (opc & 0xff)); |
| } |
| |
| static void tgen_compare_imm_branch(TCGContext *s, S390Opcode opc, int cc, |
| TCGReg r1, int i2, TCGLabel *l) |
| { |
| tcg_target_long off = 0; |
| |
| if (l->has_value) { |
| off = l->u.value_ptr - s->code_ptr; |
| tcg_debug_assert(off == (int16_t)off); |
| } else { |
| tcg_out_reloc(s, s->code_ptr + 1, R_390_PC16DBL, l, 2); |
| } |
| |
| tcg_out16(s, (opc & 0xff00) | (r1 << 4) | cc); |
| tcg_out16(s, off); |
| tcg_out16(s, (i2 << 8) | (opc & 0xff)); |
| } |
| |
| static void tgen_brcond(TCGContext *s, TCGType type, TCGCond c, |
| TCGReg r1, TCGArg c2, int c2const, TCGLabel *l) |
| { |
| int cc; |
| |
| if (s390_facilities & FACILITY_GEN_INST_EXT) { |
| bool is_unsigned = is_unsigned_cond(c); |
| bool in_range; |
| S390Opcode opc; |
| |
| cc = tcg_cond_to_s390_cond[c]; |
| |
| if (!c2const) { |
| opc = (type == TCG_TYPE_I32 |
| ? (is_unsigned ? RIE_CLRJ : RIE_CRJ) |
| : (is_unsigned ? RIE_CLGRJ : RIE_CGRJ)); |
| tgen_compare_branch(s, opc, cc, r1, c2, l); |
| return; |
| } |
| |
| /* COMPARE IMMEDIATE AND BRANCH RELATIVE has an 8-bit immediate field. |
| If the immediate we've been given does not fit that range, we'll |
| fall back to separate compare and branch instructions using the |
| larger comparison range afforded by COMPARE IMMEDIATE. */ |
| if (type == TCG_TYPE_I32) { |
| if (is_unsigned) { |
| opc = RIE_CLIJ; |
| in_range = (uint32_t)c2 == (uint8_t)c2; |
| } else { |
| opc = RIE_CIJ; |
| in_range = (int32_t)c2 == (int8_t)c2; |
| } |
| } else { |
| if (is_unsigned) { |
| opc = RIE_CLGIJ; |
| in_range = (uint64_t)c2 == (uint8_t)c2; |
| } else { |
| opc = RIE_CGIJ; |
| in_range = (int64_t)c2 == (int8_t)c2; |
| } |
| } |
| if (in_range) { |
| tgen_compare_imm_branch(s, opc, cc, r1, c2, l); |
| return; |
| } |
| } |
| |
| cc = tgen_cmp(s, type, c, r1, c2, c2const, false); |
| tgen_branch(s, cc, l); |
| } |
| |
| static void tcg_out_call(TCGContext *s, tcg_insn_unit *dest) |
| { |
| ptrdiff_t off = dest - s->code_ptr; |
| if (off == (int32_t)off) { |
| tcg_out_insn(s, RIL, BRASL, TCG_REG_R14, off); |
| } else { |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, (uintptr_t)dest); |
| tcg_out_insn(s, RR, BASR, TCG_REG_R14, TCG_TMP0); |
| } |
| } |
| |
| static void tcg_out_qemu_ld_direct(TCGContext *s, TCGMemOp opc, TCGReg data, |
| TCGReg base, TCGReg index, int disp) |
| { |
| switch (opc & (MO_SSIZE | MO_BSWAP)) { |
| case MO_UB: |
| tcg_out_insn(s, RXY, LLGC, data, base, index, disp); |
| break; |
| case MO_SB: |
| tcg_out_insn(s, RXY, LGB, data, base, index, disp); |
| break; |
| |
| case MO_UW | MO_BSWAP: |
| /* swapped unsigned halfword load with upper bits zeroed */ |
| tcg_out_insn(s, RXY, LRVH, data, base, index, disp); |
| tgen_ext16u(s, TCG_TYPE_I64, data, data); |
| break; |
| case MO_UW: |
| tcg_out_insn(s, RXY, LLGH, data, base, index, disp); |
| break; |
| |
| case MO_SW | MO_BSWAP: |
| /* swapped sign-extended halfword load */ |
| tcg_out_insn(s, RXY, LRVH, data, base, index, disp); |
| tgen_ext16s(s, TCG_TYPE_I64, data, data); |
| break; |
| case MO_SW: |
| tcg_out_insn(s, RXY, LGH, data, base, index, disp); |
| break; |
| |
| case MO_UL | MO_BSWAP: |
| /* swapped unsigned int load with upper bits zeroed */ |
| tcg_out_insn(s, RXY, LRV, data, base, index, disp); |
| tgen_ext32u(s, data, data); |
| break; |
| case MO_UL: |
| tcg_out_insn(s, RXY, LLGF, data, base, index, disp); |
| break; |
| |
| case MO_SL | MO_BSWAP: |
| /* swapped sign-extended int load */ |
| tcg_out_insn(s, RXY, LRV, data, base, index, disp); |
| tgen_ext32s(s, data, data); |
| break; |
| case MO_SL: |
| tcg_out_insn(s, RXY, LGF, data, base, index, disp); |
| break; |
| |
| case MO_Q | MO_BSWAP: |
| tcg_out_insn(s, RXY, LRVG, data, base, index, disp); |
| break; |
| case MO_Q: |
| tcg_out_insn(s, RXY, LG, data, base, index, disp); |
| break; |
| |
| default: |
| tcg_abort(); |
| } |
| } |
| |
| static void tcg_out_qemu_st_direct(TCGContext *s, TCGMemOp opc, TCGReg data, |
| TCGReg base, TCGReg index, int disp) |
| { |
| switch (opc & (MO_SIZE | MO_BSWAP)) { |
| case MO_UB: |
| if (disp >= 0 && disp < 0x1000) { |
| tcg_out_insn(s, RX, STC, data, base, index, disp); |
| } else { |
| tcg_out_insn(s, RXY, STCY, data, base, index, disp); |
| } |
| break; |
| |
| case MO_UW | MO_BSWAP: |
| tcg_out_insn(s, RXY, STRVH, data, base, index, disp); |
| break; |
| case MO_UW: |
| if (disp >= 0 && disp < 0x1000) { |
| tcg_out_insn(s, RX, STH, data, base, index, disp); |
| } else { |
| tcg_out_insn(s, RXY, STHY, data, base, index, disp); |
| } |
| break; |
| |
| case MO_UL | MO_BSWAP: |
| tcg_out_insn(s, RXY, STRV, data, base, index, disp); |
| break; |
| case MO_UL: |
| if (disp >= 0 && disp < 0x1000) { |
| tcg_out_insn(s, RX, ST, data, base, index, disp); |
| } else { |
| tcg_out_insn(s, RXY, STY, data, base, index, disp); |
| } |
| break; |
| |
| case MO_Q | MO_BSWAP: |
| tcg_out_insn(s, RXY, STRVG, data, base, index, disp); |
| break; |
| case MO_Q: |
| tcg_out_insn(s, RXY, STG, data, base, index, disp); |
| break; |
| |
| default: |
| tcg_abort(); |
| } |
| } |
| |
| #if defined(CONFIG_SOFTMMU) |
| #include "tcg-ldst.inc.c" |
| |
| /* We're expecting to use a 20-bit signed offset on the tlb memory ops. */ |
| QEMU_BUILD_BUG_ON(offsetof(CPUArchState, tlb_mask[NB_MMU_MODES - 1]) |
| > 0x7ffff); |
| QEMU_BUILD_BUG_ON(offsetof(CPUArchState, tlb_table[NB_MMU_MODES - 1]) |
| > 0x7ffff); |
| |
| /* Load and compare a TLB entry, leaving the flags set. Loads the TLB |
| addend into R2. Returns a register with the santitized guest address. */ |
| static TCGReg tcg_out_tlb_read(TCGContext* s, TCGReg addr_reg, TCGMemOp opc, |
| int mem_index, bool is_ld) |
| { |
| unsigned s_bits = opc & MO_SIZE; |
| unsigned a_bits = get_alignment_bits(opc); |
| unsigned s_mask = (1 << s_bits) - 1; |
| unsigned a_mask = (1 << a_bits) - 1; |
| int mask_off = offsetof(CPUArchState, tlb_mask[mem_index]); |
| int table_off = offsetof(CPUArchState, tlb_table[mem_index]); |
| int ofs, a_off; |
| uint64_t tlb_mask; |
| |
| tcg_out_sh64(s, RSY_SRLG, TCG_REG_R2, addr_reg, TCG_REG_NONE, |
| TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS); |
| tcg_out_insn(s, RXY, NG, TCG_REG_R2, TCG_AREG0, TCG_REG_NONE, mask_off); |
| tcg_out_insn(s, RXY, AG, TCG_REG_R2, TCG_AREG0, TCG_REG_NONE, table_off); |
| |
| /* For aligned accesses, we check the first byte and include the alignment |
| bits within the address. For unaligned access, we check that we don't |
| cross pages using the address of the last byte of the access. */ |
| a_off = (a_bits >= s_bits ? 0 : s_mask - a_mask); |
| tlb_mask = (uint64_t)TARGET_PAGE_MASK | a_mask; |
| if ((s390_facilities & FACILITY_GEN_INST_EXT) && a_off == 0) { |
| tgen_andi_risbg(s, TCG_REG_R3, addr_reg, tlb_mask); |
| } else { |
| tcg_out_insn(s, RX, LA, TCG_REG_R3, addr_reg, TCG_REG_NONE, a_off); |
| tgen_andi(s, TCG_TYPE_TL, TCG_REG_R3, tlb_mask); |
| } |
| |
| if (is_ld) { |
| ofs = offsetof(CPUTLBEntry, addr_read); |
| } else { |
| ofs = offsetof(CPUTLBEntry, addr_write); |
| } |
| if (TARGET_LONG_BITS == 32) { |
| tcg_out_insn(s, RX, C, TCG_REG_R3, TCG_REG_R2, TCG_REG_NONE, ofs); |
| } else { |
| tcg_out_insn(s, RXY, CG, TCG_REG_R3, TCG_REG_R2, TCG_REG_NONE, ofs); |
| } |
| |
| tcg_out_insn(s, RXY, LG, TCG_REG_R2, TCG_REG_R2, TCG_REG_NONE, |
| offsetof(CPUTLBEntry, addend)); |
| |
| if (TARGET_LONG_BITS == 32) { |
| tgen_ext32u(s, TCG_REG_R3, addr_reg); |
| return TCG_REG_R3; |
| } |
| return addr_reg; |
| } |
| |
| static void add_qemu_ldst_label(TCGContext *s, bool is_ld, TCGMemOpIdx oi, |
| TCGReg data, TCGReg addr, |
| tcg_insn_unit *raddr, tcg_insn_unit *label_ptr) |
| { |
| TCGLabelQemuLdst *label = new_ldst_label(s); |
| |
| label->is_ld = is_ld; |
| label->oi = oi; |
| label->datalo_reg = data; |
| label->addrlo_reg = addr; |
| label->raddr = raddr; |
| label->label_ptr[0] = label_ptr; |
| } |
| |
| static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *lb) |
| { |
| TCGReg addr_reg = lb->addrlo_reg; |
| TCGReg data_reg = lb->datalo_reg; |
| TCGMemOpIdx oi = lb->oi; |
| TCGMemOp opc = get_memop(oi); |
| |
| if (!patch_reloc(lb->label_ptr[0], R_390_PC16DBL, |
| (intptr_t)s->code_ptr, 2)) { |
| return false; |
| } |
| |
| tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_R2, TCG_AREG0); |
| if (TARGET_LONG_BITS == 64) { |
| tcg_out_mov(s, TCG_TYPE_I64, TCG_REG_R3, addr_reg); |
| } |
| tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_R4, oi); |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R5, (uintptr_t)lb->raddr); |
| tcg_out_call(s, qemu_ld_helpers[opc & (MO_BSWAP | MO_SSIZE)]); |
| tcg_out_mov(s, TCG_TYPE_I64, data_reg, TCG_REG_R2); |
| |
| tgen_gotoi(s, S390_CC_ALWAYS, lb->raddr); |
| return true; |
| } |
| |
| static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *lb) |
| { |
| TCGReg addr_reg = lb->addrlo_reg; |
| TCGReg data_reg = lb->datalo_reg; |
| TCGMemOpIdx oi = lb->oi; |
| TCGMemOp opc = get_memop(oi); |
| |
| if (!patch_reloc(lb->label_ptr[0], R_390_PC16DBL, |
| (intptr_t)s->code_ptr, 2)) { |
| return false; |
| } |
| |
| tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_R2, TCG_AREG0); |
| if (TARGET_LONG_BITS == 64) { |
| tcg_out_mov(s, TCG_TYPE_I64, TCG_REG_R3, addr_reg); |
| } |
| switch (opc & MO_SIZE) { |
| case MO_UB: |
| tgen_ext8u(s, TCG_TYPE_I64, TCG_REG_R4, data_reg); |
| break; |
| case MO_UW: |
| tgen_ext16u(s, TCG_TYPE_I64, TCG_REG_R4, data_reg); |
| break; |
| case MO_UL: |
| tgen_ext32u(s, TCG_REG_R4, data_reg); |
| break; |
| case MO_Q: |
| tcg_out_mov(s, TCG_TYPE_I64, TCG_REG_R4, data_reg); |
| break; |
| default: |
| tcg_abort(); |
| } |
| tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_R5, oi); |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R6, (uintptr_t)lb->raddr); |
| tcg_out_call(s, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)]); |
| |
| tgen_gotoi(s, S390_CC_ALWAYS, lb->raddr); |
| return true; |
| } |
| #else |
| static void tcg_prepare_user_ldst(TCGContext *s, TCGReg *addr_reg, |
| TCGReg *index_reg, tcg_target_long *disp) |
| { |
| if (TARGET_LONG_BITS == 32) { |
| tgen_ext32u(s, TCG_TMP0, *addr_reg); |
| *addr_reg = TCG_TMP0; |
| } |
| if (guest_base < 0x80000) { |
| *index_reg = TCG_REG_NONE; |
| *disp = guest_base; |
| } else { |
| *index_reg = TCG_GUEST_BASE_REG; |
| *disp = 0; |
| } |
| } |
| #endif /* CONFIG_SOFTMMU */ |
| |
| static void tcg_out_qemu_ld(TCGContext* s, TCGReg data_reg, TCGReg addr_reg, |
| TCGMemOpIdx oi) |
| { |
| TCGMemOp opc = get_memop(oi); |
| #ifdef CONFIG_SOFTMMU |
| unsigned mem_index = get_mmuidx(oi); |
| tcg_insn_unit *label_ptr; |
| TCGReg base_reg; |
| |
| base_reg = tcg_out_tlb_read(s, addr_reg, opc, mem_index, 1); |
| |
| tcg_out16(s, RI_BRC | (S390_CC_NE << 4)); |
| label_ptr = s->code_ptr; |
| s->code_ptr += 1; |
| |
| tcg_out_qemu_ld_direct(s, opc, data_reg, base_reg, TCG_REG_R2, 0); |
| |
| add_qemu_ldst_label(s, 1, oi, data_reg, addr_reg, s->code_ptr, label_ptr); |
| #else |
| TCGReg index_reg; |
| tcg_target_long disp; |
| |
| tcg_prepare_user_ldst(s, &addr_reg, &index_reg, &disp); |
| tcg_out_qemu_ld_direct(s, opc, data_reg, addr_reg, index_reg, disp); |
| #endif |
| } |
| |
| static void tcg_out_qemu_st(TCGContext* s, TCGReg data_reg, TCGReg addr_reg, |
| TCGMemOpIdx oi) |
| { |
| TCGMemOp opc = get_memop(oi); |
| #ifdef CONFIG_SOFTMMU |
| unsigned mem_index = get_mmuidx(oi); |
| tcg_insn_unit *label_ptr; |
| TCGReg base_reg; |
| |
| base_reg = tcg_out_tlb_read(s, addr_reg, opc, mem_index, 0); |
| |
| tcg_out16(s, RI_BRC | (S390_CC_NE << 4)); |
| label_ptr = s->code_ptr; |
| s->code_ptr += 1; |
| |
| tcg_out_qemu_st_direct(s, opc, data_reg, base_reg, TCG_REG_R2, 0); |
| |
| add_qemu_ldst_label(s, 0, oi, data_reg, addr_reg, s->code_ptr, label_ptr); |
| #else |
| TCGReg index_reg; |
| tcg_target_long disp; |
| |
| tcg_prepare_user_ldst(s, &addr_reg, &index_reg, &disp); |
| tcg_out_qemu_st_direct(s, opc, data_reg, addr_reg, index_reg, disp); |
| #endif |
| } |
| |
| # define OP_32_64(x) \ |
| case glue(glue(INDEX_op_,x),_i32): \ |
| case glue(glue(INDEX_op_,x),_i64) |
| |
| static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, |
| const TCGArg *args, const int *const_args) |
| { |
| S390Opcode op, op2; |
| TCGArg a0, a1, a2; |
| |
| switch (opc) { |
| case INDEX_op_exit_tb: |
| /* Reuse the zeroing that exists for goto_ptr. */ |
| a0 = args[0]; |
| if (a0 == 0) { |
| tgen_gotoi(s, S390_CC_ALWAYS, s->code_gen_epilogue); |
| } else { |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R2, a0); |
| tgen_gotoi(s, S390_CC_ALWAYS, tb_ret_addr); |
| } |
| break; |
| |
| case INDEX_op_goto_tb: |
| a0 = args[0]; |
| if (s->tb_jmp_insn_offset) { |
| /* branch displacement must be aligned for atomic patching; |
| * see if we need to add extra nop before branch |
| */ |
| if (!QEMU_PTR_IS_ALIGNED(s->code_ptr + 1, 4)) { |
| tcg_out16(s, NOP); |
| } |
| tcg_debug_assert(!USE_REG_TB); |
| tcg_out16(s, RIL_BRCL | (S390_CC_ALWAYS << 4)); |
| s->tb_jmp_insn_offset[a0] = tcg_current_code_size(s); |
| s->code_ptr += 2; |
| } else { |
| /* load address stored at s->tb_jmp_target_addr + a0 */ |
| tcg_out_ld_abs(s, TCG_TYPE_PTR, TCG_REG_TB, |
| s->tb_jmp_target_addr + a0); |
| /* and go there */ |
| tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, TCG_REG_TB); |
| } |
| set_jmp_reset_offset(s, a0); |
| |
| /* For the unlinked path of goto_tb, we need to reset |
| TCG_REG_TB to the beginning of this TB. */ |
| if (USE_REG_TB) { |
| int ofs = -tcg_current_code_size(s); |
| assert(ofs == (int16_t)ofs); |
| tcg_out_insn(s, RI, AGHI, TCG_REG_TB, ofs); |
| } |
| break; |
| |
| case INDEX_op_goto_ptr: |
| a0 = args[0]; |
| if (USE_REG_TB) { |
| tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_TB, a0); |
| } |
| tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, a0); |
| break; |
| |
| OP_32_64(ld8u): |
| /* ??? LLC (RXY format) is only present with the extended-immediate |
| facility, whereas LLGC is always present. */ |
| tcg_out_mem(s, 0, RXY_LLGC, args[0], args[1], TCG_REG_NONE, args[2]); |
| break; |
| |
| OP_32_64(ld8s): |
| /* ??? LB is no smaller than LGB, so no point to using it. */ |
| tcg_out_mem(s, 0, RXY_LGB, args[0], args[1], TCG_REG_NONE, args[2]); |
| break; |
| |
| OP_32_64(ld16u): |
| /* ??? LLH (RXY format) is only present with the extended-immediate |
| facility, whereas LLGH is always present. */ |
| tcg_out_mem(s, 0, RXY_LLGH, args[0], args[1], TCG_REG_NONE, args[2]); |
| break; |
| |
| case INDEX_op_ld16s_i32: |
| tcg_out_mem(s, RX_LH, RXY_LHY, args[0], args[1], TCG_REG_NONE, args[2]); |
| break; |
| |
| case INDEX_op_ld_i32: |
| tcg_out_ld(s, TCG_TYPE_I32, args[0], args[1], args[2]); |
| break; |
| |
| OP_32_64(st8): |
| tcg_out_mem(s, RX_STC, RXY_STCY, args[0], args[1], |
| TCG_REG_NONE, args[2]); |
| break; |
| |
| OP_32_64(st16): |
| tcg_out_mem(s, RX_STH, RXY_STHY, args[0], args[1], |
| TCG_REG_NONE, args[2]); |
| break; |
| |
| case INDEX_op_st_i32: |
| tcg_out_st(s, TCG_TYPE_I32, args[0], args[1], args[2]); |
| break; |
| |
| case INDEX_op_add_i32: |
| a0 = args[0], a1 = args[1], a2 = (int32_t)args[2]; |
| if (const_args[2]) { |
| do_addi_32: |
| if (a0 == a1) { |
| if (a2 == (int16_t)a2) { |
| tcg_out_insn(s, RI, AHI, a0, a2); |
| break; |
| } |
| if (s390_facilities & FACILITY_EXT_IMM) { |
| tcg_out_insn(s, RIL, AFI, a0, a2); |
| break; |
| } |
| } |
| tcg_out_mem(s, RX_LA, RXY_LAY, a0, a1, TCG_REG_NONE, a2); |
| } else if (a0 == a1) { |
| tcg_out_insn(s, RR, AR, a0, a2); |
| } else { |
| tcg_out_insn(s, RX, LA, a0, a1, a2, 0); |
| } |
| break; |
| case INDEX_op_sub_i32: |
| a0 = args[0], a1 = args[1], a2 = (int32_t)args[2]; |
| if (const_args[2]) { |
| a2 = -a2; |
| goto do_addi_32; |
| } else if (a0 == a1) { |
| tcg_out_insn(s, RR, SR, a0, a2); |
| } else { |
| tcg_out_insn(s, RRF, SRK, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_and_i32: |
| a0 = args[0], a1 = args[1], a2 = (uint32_t)args[2]; |
| if (const_args[2]) { |
| tcg_out_mov(s, TCG_TYPE_I32, a0, a1); |
| tgen_andi(s, TCG_TYPE_I32, a0, a2); |
| } else if (a0 == a1) { |
| tcg_out_insn(s, RR, NR, a0, a2); |
| } else { |
| tcg_out_insn(s, RRF, NRK, a0, a1, a2); |
| } |
| break; |
| case INDEX_op_or_i32: |
| a0 = args[0], a1 = args[1], a2 = (uint32_t)args[2]; |
| if (const_args[2]) { |
| tcg_out_mov(s, TCG_TYPE_I32, a0, a1); |
| tgen_ori(s, TCG_TYPE_I32, a0, a2); |
| } else if (a0 == a1) { |
| tcg_out_insn(s, RR, OR, a0, a2); |
| } else { |
| tcg_out_insn(s, RRF, ORK, a0, a1, a2); |
| } |
| break; |
| case INDEX_op_xor_i32: |
| a0 = args[0], a1 = args[1], a2 = (uint32_t)args[2]; |
| if (const_args[2]) { |
| tcg_out_mov(s, TCG_TYPE_I32, a0, a1); |
| tgen_xori(s, TCG_TYPE_I32, a0, a2); |
| } else if (a0 == a1) { |
| tcg_out_insn(s, RR, XR, args[0], args[2]); |
| } else { |
| tcg_out_insn(s, RRF, XRK, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_neg_i32: |
| tcg_out_insn(s, RR, LCR, args[0], args[1]); |
| break; |
| |
| case INDEX_op_mul_i32: |
| if (const_args[2]) { |
| if ((int32_t)args[2] == (int16_t)args[2]) { |
| tcg_out_insn(s, RI, MHI, args[0], args[2]); |
| } else { |
| tcg_out_insn(s, RIL, MSFI, args[0], args[2]); |
| } |
| } else { |
| tcg_out_insn(s, RRE, MSR, args[0], args[2]); |
| } |
| break; |
| |
| case INDEX_op_div2_i32: |
| tcg_out_insn(s, RR, DR, TCG_REG_R2, args[4]); |
| break; |
| case INDEX_op_divu2_i32: |
| tcg_out_insn(s, RRE, DLR, TCG_REG_R2, args[4]); |
| break; |
| |
| case INDEX_op_shl_i32: |
| op = RS_SLL; |
| op2 = RSY_SLLK; |
| do_shift32: |
| a0 = args[0], a1 = args[1], a2 = (int32_t)args[2]; |
| if (a0 == a1) { |
| if (const_args[2]) { |
| tcg_out_sh32(s, op, a0, TCG_REG_NONE, a2); |
| } else { |
| tcg_out_sh32(s, op, a0, a2, 0); |
| } |
| } else { |
| /* Using tcg_out_sh64 here for the format; it is a 32-bit shift. */ |
| if (const_args[2]) { |
| tcg_out_sh64(s, op2, a0, a1, TCG_REG_NONE, a2); |
| } else { |
| tcg_out_sh64(s, op2, a0, a1, a2, 0); |
| } |
| } |
| break; |
| case INDEX_op_shr_i32: |
| op = RS_SRL; |
| op2 = RSY_SRLK; |
| goto do_shift32; |
| case INDEX_op_sar_i32: |
| op = RS_SRA; |
| op2 = RSY_SRAK; |
| goto do_shift32; |
| |
| case INDEX_op_rotl_i32: |
| /* ??? Using tcg_out_sh64 here for the format; it is a 32-bit rol. */ |
| if (const_args[2]) { |
| tcg_out_sh64(s, RSY_RLL, args[0], args[1], TCG_REG_NONE, args[2]); |
| } else { |
| tcg_out_sh64(s, RSY_RLL, args[0], args[1], args[2], 0); |
| } |
| break; |
| case INDEX_op_rotr_i32: |
| if (const_args[2]) { |
| tcg_out_sh64(s, RSY_RLL, args[0], args[1], |
| TCG_REG_NONE, (32 - args[2]) & 31); |
| } else { |
| tcg_out_insn(s, RR, LCR, TCG_TMP0, args[2]); |
| tcg_out_sh64(s, RSY_RLL, args[0], args[1], TCG_TMP0, 0); |
| } |
| break; |
| |
| case INDEX_op_ext8s_i32: |
| tgen_ext8s(s, TCG_TYPE_I32, args[0], args[1]); |
| break; |
| case INDEX_op_ext16s_i32: |
| tgen_ext16s(s, TCG_TYPE_I32, args[0], args[1]); |
| break; |
| case INDEX_op_ext8u_i32: |
| tgen_ext8u(s, TCG_TYPE_I32, args[0], args[1]); |
| break; |
| case INDEX_op_ext16u_i32: |
| tgen_ext16u(s, TCG_TYPE_I32, args[0], args[1]); |
| break; |
| |
| OP_32_64(bswap16): |
| /* The TCG bswap definition requires bits 0-47 already be zero. |
| Thus we don't need the G-type insns to implement bswap16_i64. */ |
| tcg_out_insn(s, RRE, LRVR, args[0], args[1]); |
| tcg_out_sh32(s, RS_SRL, args[0], TCG_REG_NONE, 16); |
| break; |
| OP_32_64(bswap32): |
| tcg_out_insn(s, RRE, LRVR, args[0], args[1]); |
| break; |
| |
| case INDEX_op_add2_i32: |
| if (const_args[4]) { |
| tcg_out_insn(s, RIL, ALFI, args[0], args[4]); |
| } else { |
| tcg_out_insn(s, RR, ALR, args[0], args[4]); |
| } |
| tcg_out_insn(s, RRE, ALCR, args[1], args[5]); |
| break; |
| case INDEX_op_sub2_i32: |
| if (const_args[4]) { |
| tcg_out_insn(s, RIL, SLFI, args[0], args[4]); |
| } else { |
| tcg_out_insn(s, RR, SLR, args[0], args[4]); |
| } |
| tcg_out_insn(s, RRE, SLBR, args[1], args[5]); |
| break; |
| |
| case INDEX_op_br: |
| tgen_branch(s, S390_CC_ALWAYS, arg_label(args[0])); |
| break; |
| |
| case INDEX_op_brcond_i32: |
| tgen_brcond(s, TCG_TYPE_I32, args[2], args[0], |
| args[1], const_args[1], arg_label(args[3])); |
| break; |
| case INDEX_op_setcond_i32: |
| tgen_setcond(s, TCG_TYPE_I32, args[3], args[0], args[1], |
| args[2], const_args[2]); |
| break; |
| case INDEX_op_movcond_i32: |
| tgen_movcond(s, TCG_TYPE_I32, args[5], args[0], args[1], |
| args[2], const_args[2], args[3], const_args[3]); |
| break; |
| |
| case INDEX_op_qemu_ld_i32: |
| /* ??? Technically we can use a non-extending instruction. */ |
| case INDEX_op_qemu_ld_i64: |
| tcg_out_qemu_ld(s, args[0], args[1], args[2]); |
| break; |
| case INDEX_op_qemu_st_i32: |
| case INDEX_op_qemu_st_i64: |
| tcg_out_qemu_st(s, args[0], args[1], args[2]); |
| break; |
| |
| case INDEX_op_ld16s_i64: |
| tcg_out_mem(s, 0, RXY_LGH, args[0], args[1], TCG_REG_NONE, args[2]); |
| break; |
| case INDEX_op_ld32u_i64: |
| tcg_out_mem(s, 0, RXY_LLGF, args[0], args[1], TCG_REG_NONE, args[2]); |
| break; |
| case INDEX_op_ld32s_i64: |
| tcg_out_mem(s, 0, RXY_LGF, args[0], args[1], TCG_REG_NONE, args[2]); |
| break; |
| case INDEX_op_ld_i64: |
| tcg_out_ld(s, TCG_TYPE_I64, args[0], args[1], args[2]); |
| break; |
| |
| case INDEX_op_st32_i64: |
| tcg_out_st(s, TCG_TYPE_I32, args[0], args[1], args[2]); |
| break; |
| case INDEX_op_st_i64: |
| tcg_out_st(s, TCG_TYPE_I64, args[0], args[1], args[2]); |
| break; |
| |
| case INDEX_op_add_i64: |
| a0 = args[0], a1 = args[1], a2 = args[2]; |
| if (const_args[2]) { |
| do_addi_64: |
| if (a0 == a1) { |
| if (a2 == (int16_t)a2) { |
| tcg_out_insn(s, RI, AGHI, a0, a2); |
| break; |
| } |
| if (s390_facilities & FACILITY_EXT_IMM) { |
| if (a2 == (int32_t)a2) { |
| tcg_out_insn(s, RIL, AGFI, a0, a2); |
| break; |
| } else if (a2 == (uint32_t)a2) { |
| tcg_out_insn(s, RIL, ALGFI, a0, a2); |
| break; |
| } else if (-a2 == (uint32_t)-a2) { |
| tcg_out_insn(s, RIL, SLGFI, a0, -a2); |
| break; |
| } |
| } |
| } |
| tcg_out_mem(s, RX_LA, RXY_LAY, a0, a1, TCG_REG_NONE, a2); |
| } else if (a0 == a1) { |
| tcg_out_insn(s, RRE, AGR, a0, a2); |
| } else { |
| tcg_out_insn(s, RX, LA, a0, a1, a2, 0); |
| } |
| break; |
| case INDEX_op_sub_i64: |
| a0 = args[0], a1 = args[1], a2 = args[2]; |
| if (const_args[2]) { |
| a2 = -a2; |
| goto do_addi_64; |
| } else if (a0 == a1) { |
| tcg_out_insn(s, RRE, SGR, a0, a2); |
| } else { |
| tcg_out_insn(s, RRF, SGRK, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_and_i64: |
| a0 = args[0], a1 = args[1], a2 = args[2]; |
| if (const_args[2]) { |
| tcg_out_mov(s, TCG_TYPE_I64, a0, a1); |
| tgen_andi(s, TCG_TYPE_I64, args[0], args[2]); |
| } else if (a0 == a1) { |
| tcg_out_insn(s, RRE, NGR, args[0], args[2]); |
| } else { |
| tcg_out_insn(s, RRF, NGRK, a0, a1, a2); |
| } |
| break; |
| case INDEX_op_or_i64: |
| a0 = args[0], a1 = args[1], a2 = args[2]; |
| if (const_args[2]) { |
| tcg_out_mov(s, TCG_TYPE_I64, a0, a1); |
| tgen_ori(s, TCG_TYPE_I64, a0, a2); |
| } else if (a0 == a1) { |
| tcg_out_insn(s, RRE, OGR, a0, a2); |
| } else { |
| tcg_out_insn(s, RRF, OGRK, a0, a1, a2); |
| } |
| break; |
| case INDEX_op_xor_i64: |
| a0 = args[0], a1 = args[1], a2 = args[2]; |
| if (const_args[2]) { |
| tcg_out_mov(s, TCG_TYPE_I64, a0, a1); |
| tgen_xori(s, TCG_TYPE_I64, a0, a2); |
| } else if (a0 == a1) { |
| tcg_out_insn(s, RRE, XGR, a0, a2); |
| } else { |
| tcg_out_insn(s, RRF, XGRK, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_neg_i64: |
| tcg_out_insn(s, RRE, LCGR, args[0], args[1]); |
| break; |
| case INDEX_op_bswap64_i64: |
| tcg_out_insn(s, RRE, LRVGR, args[0], args[1]); |
| break; |
| |
| case INDEX_op_mul_i64: |
| if (const_args[2]) { |
| if (args[2] == (int16_t)args[2]) { |
| tcg_out_insn(s, RI, MGHI, args[0], args[2]); |
| } else { |
| tcg_out_insn(s, RIL, MSGFI, args[0], args[2]); |
| } |
| } else { |
| tcg_out_insn(s, RRE, MSGR, args[0], args[2]); |
| } |
| break; |
| |
| case INDEX_op_div2_i64: |
| /* ??? We get an unnecessary sign-extension of the dividend |
| into R3 with this definition, but as we do in fact always |
| produce both quotient and remainder using INDEX_op_div_i64 |
| instead requires jumping through even more hoops. */ |
| tcg_out_insn(s, RRE, DSGR, TCG_REG_R2, args[4]); |
| break; |
| case INDEX_op_divu2_i64: |
| tcg_out_insn(s, RRE, DLGR, TCG_REG_R2, args[4]); |
| break; |
| case INDEX_op_mulu2_i64: |
| tcg_out_insn(s, RRE, MLGR, TCG_REG_R2, args[3]); |
| break; |
| |
| case INDEX_op_shl_i64: |
| op = RSY_SLLG; |
| do_shift64: |
| if (const_args[2]) { |
| tcg_out_sh64(s, op, args[0], args[1], TCG_REG_NONE, args[2]); |
| } else { |
| tcg_out_sh64(s, op, args[0], args[1], args[2], 0); |
| } |
| break; |
| case INDEX_op_shr_i64: |
| op = RSY_SRLG; |
| goto do_shift64; |
| case INDEX_op_sar_i64: |
| op = RSY_SRAG; |
| goto do_shift64; |
| |
| case INDEX_op_rotl_i64: |
| if (const_args[2]) { |
| tcg_out_sh64(s, RSY_RLLG, args[0], args[1], |
| TCG_REG_NONE, args[2]); |
| } else { |
| tcg_out_sh64(s, RSY_RLLG, args[0], args[1], args[2], 0); |
| } |
| break; |
| case INDEX_op_rotr_i64: |
| if (const_args[2]) { |
| tcg_out_sh64(s, RSY_RLLG, args[0], args[1], |
| TCG_REG_NONE, (64 - args[2]) & 63); |
| } else { |
| /* We can use the smaller 32-bit negate because only the |
| low 6 bits are examined for the rotate. */ |
| tcg_out_insn(s, RR, LCR, TCG_TMP0, args[2]); |
| tcg_out_sh64(s, RSY_RLLG, args[0], args[1], TCG_TMP0, 0); |
| } |
| break; |
| |
| case INDEX_op_ext8s_i64: |
| tgen_ext8s(s, TCG_TYPE_I64, args[0], args[1]); |
| break; |
| case INDEX_op_ext16s_i64: |
| tgen_ext16s(s, TCG_TYPE_I64, args[0], args[1]); |
| break; |
| case INDEX_op_ext_i32_i64: |
| case INDEX_op_ext32s_i64: |
| tgen_ext32s(s, args[0], args[1]); |
| break; |
| case INDEX_op_ext8u_i64: |
| tgen_ext8u(s, TCG_TYPE_I64, args[0], args[1]); |
| break; |
| case INDEX_op_ext16u_i64: |
| tgen_ext16u(s, TCG_TYPE_I64, args[0], args[1]); |
| break; |
| case INDEX_op_extu_i32_i64: |
| case INDEX_op_ext32u_i64: |
| tgen_ext32u(s, args[0], args[1]); |
| break; |
| |
| case INDEX_op_add2_i64: |
| if (const_args[4]) { |
| if ((int64_t)args[4] >= 0) { |
| tcg_out_insn(s, RIL, ALGFI, args[0], args[4]); |
| } else { |
| tcg_out_insn(s, RIL, SLGFI, args[0], -args[4]); |
| } |
| } else { |
| tcg_out_insn(s, RRE, ALGR, args[0], args[4]); |
| } |
| tcg_out_insn(s, RRE, ALCGR, args[1], args[5]); |
| break; |
| case INDEX_op_sub2_i64: |
| if (const_args[4]) { |
| if ((int64_t)args[4] >= 0) { |
| tcg_out_insn(s, RIL, SLGFI, args[0], args[4]); |
| } else { |
| tcg_out_insn(s, RIL, ALGFI, args[0], -args[4]); |
| } |
| } else { |
| tcg_out_insn(s, RRE, SLGR, args[0], args[4]); |
| } |
| tcg_out_insn(s, RRE, SLBGR, args[1], args[5]); |
| break; |
| |
| case INDEX_op_brcond_i64: |
| tgen_brcond(s, TCG_TYPE_I64, args[2], args[0], |
| args[1], const_args[1], arg_label(args[3])); |
| break; |
| case INDEX_op_setcond_i64: |
| tgen_setcond(s, TCG_TYPE_I64, args[3], args[0], args[1], |
| args[2], const_args[2]); |
| break; |
| case INDEX_op_movcond_i64: |
| tgen_movcond(s, TCG_TYPE_I64, args[5], args[0], args[1], |
| args[2], const_args[2], args[3], const_args[3]); |
| break; |
| |
| OP_32_64(deposit): |
| a0 = args[0], a1 = args[1], a2 = args[2]; |
| if (const_args[1]) { |
| tgen_deposit(s, a0, a2, args[3], args[4], 1); |
| } else { |
| /* Since we can't support "0Z" as a constraint, we allow a1 in |
| any register. Fix things up as if a matching constraint. */ |
| if (a0 != a1) { |
| TCGType type = (opc == INDEX_op_deposit_i64); |
| if (a0 == a2) { |
| tcg_out_mov(s, type, TCG_TMP0, a2); |
| a2 = TCG_TMP0; |
| } |
| tcg_out_mov(s, type, a0, a1); |
| } |
| tgen_deposit(s, a0, a2, args[3], args[4], 0); |
| } |
| break; |
| |
| OP_32_64(extract): |
| tgen_extract(s, args[0], args[1], args[2], args[3]); |
| break; |
| |
| case INDEX_op_clz_i64: |
| tgen_clz(s, args[0], args[1], args[2], const_args[2]); |
| break; |
| |
| case INDEX_op_mb: |
| /* The host memory model is quite strong, we simply need to |
| serialize the instruction stream. */ |
| if (args[0] & TCG_MO_ST_LD) { |
| tcg_out_insn(s, RR, BCR, |
| s390_facilities & FACILITY_FAST_BCR_SER ? 14 : 15, 0); |
| } |
| break; |
| |
| case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */ |
| case INDEX_op_mov_i64: |
| case INDEX_op_movi_i32: /* Always emitted via tcg_out_movi. */ |
| case INDEX_op_movi_i64: |
| case INDEX_op_call: /* Always emitted via tcg_out_call. */ |
| default: |
| tcg_abort(); |
| } |
| } |
| |
| static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op) |
| { |
| static const TCGTargetOpDef r = { .args_ct_str = { "r" } }; |
| static const TCGTargetOpDef r_r = { .args_ct_str = { "r", "r" } }; |
| static const TCGTargetOpDef r_L = { .args_ct_str = { "r", "L" } }; |
| static const TCGTargetOpDef L_L = { .args_ct_str = { "L", "L" } }; |
| static const TCGTargetOpDef r_ri = { .args_ct_str = { "r", "ri" } }; |
| static const TCGTargetOpDef r_r_ri = { .args_ct_str = { "r", "r", "ri" } }; |
| static const TCGTargetOpDef r_0_ri = { .args_ct_str = { "r", "0", "ri" } }; |
| static const TCGTargetOpDef r_0_rI = { .args_ct_str = { "r", "0", "rI" } }; |
| static const TCGTargetOpDef r_0_rJ = { .args_ct_str = { "r", "0", "rJ" } }; |
| static const TCGTargetOpDef a2_r |
| = { .args_ct_str = { "r", "r", "0", "1", "r", "r" } }; |
| static const TCGTargetOpDef a2_ri |
| = { .args_ct_str = { "r", "r", "0", "1", "ri", "r" } }; |
| static const TCGTargetOpDef a2_rA |
| = { .args_ct_str = { "r", "r", "0", "1", "rA", "r" } }; |
| |
| switch (op) { |
| case INDEX_op_goto_ptr: |
| return &r; |
| |
| case INDEX_op_ld8u_i32: |
| case INDEX_op_ld8u_i64: |
| case INDEX_op_ld8s_i32: |
| case INDEX_op_ld8s_i64: |
| case INDEX_op_ld16u_i32: |
| case INDEX_op_ld16u_i64: |
| case INDEX_op_ld16s_i32: |
| case INDEX_op_ld16s_i64: |
| case INDEX_op_ld_i32: |
| case INDEX_op_ld32u_i64: |
| case INDEX_op_ld32s_i64: |
| case INDEX_op_ld_i64: |
| case INDEX_op_st8_i32: |
| case INDEX_op_st8_i64: |
| case INDEX_op_st16_i32: |
| case INDEX_op_st16_i64: |
| case INDEX_op_st_i32: |
| case INDEX_op_st32_i64: |
| case INDEX_op_st_i64: |
| return &r_r; |
| |
| case INDEX_op_add_i32: |
| case INDEX_op_add_i64: |
| return &r_r_ri; |
| case INDEX_op_sub_i32: |
| case INDEX_op_sub_i64: |
| case INDEX_op_and_i32: |
| case INDEX_op_and_i64: |
| case INDEX_op_or_i32: |
| case INDEX_op_or_i64: |
| case INDEX_op_xor_i32: |
| case INDEX_op_xor_i64: |
| return (s390_facilities & FACILITY_DISTINCT_OPS ? &r_r_ri : &r_0_ri); |
| |
| case INDEX_op_mul_i32: |
| /* If we have the general-instruction-extensions, then we have |
| MULTIPLY SINGLE IMMEDIATE with a signed 32-bit, otherwise we |
| have only MULTIPLY HALFWORD IMMEDIATE, with a signed 16-bit. */ |
| return (s390_facilities & FACILITY_GEN_INST_EXT ? &r_0_ri : &r_0_rI); |
| case INDEX_op_mul_i64: |
| return (s390_facilities & FACILITY_GEN_INST_EXT ? &r_0_rJ : &r_0_rI); |
| |
| case INDEX_op_shl_i32: |
| case INDEX_op_shr_i32: |
| case INDEX_op_sar_i32: |
| return (s390_facilities & FACILITY_DISTINCT_OPS ? &r_r_ri : &r_0_ri); |
| |
| case INDEX_op_shl_i64: |
| case INDEX_op_shr_i64: |
| case INDEX_op_sar_i64: |
| return &r_r_ri; |
| |
| case INDEX_op_rotl_i32: |
| case INDEX_op_rotl_i64: |
| case INDEX_op_rotr_i32: |
| case INDEX_op_rotr_i64: |
| return &r_r_ri; |
| |
| case INDEX_op_brcond_i32: |
| case INDEX_op_brcond_i64: |
| return &r_ri; |
| |
| case INDEX_op_bswap16_i32: |
| case INDEX_op_bswap16_i64: |
| case INDEX_op_bswap32_i32: |
| case INDEX_op_bswap32_i64: |
| case INDEX_op_bswap64_i64: |
| case INDEX_op_neg_i32: |
| case INDEX_op_neg_i64: |
| case INDEX_op_ext8s_i32: |
| case INDEX_op_ext8s_i64: |
| case INDEX_op_ext8u_i32: |
| case INDEX_op_ext8u_i64: |
| case INDEX_op_ext16s_i32: |
| case INDEX_op_ext16s_i64: |
| case INDEX_op_ext16u_i32: |
| case INDEX_op_ext16u_i64: |
| case INDEX_op_ext32s_i64: |
| case INDEX_op_ext32u_i64: |
| case INDEX_op_ext_i32_i64: |
| case INDEX_op_extu_i32_i64: |
| case INDEX_op_extract_i32: |
| case INDEX_op_extract_i64: |
| return &r_r; |
| |
| case INDEX_op_clz_i64: |
| case INDEX_op_setcond_i32: |
| case INDEX_op_setcond_i64: |
| return &r_r_ri; |
| |
| case INDEX_op_qemu_ld_i32: |
| case INDEX_op_qemu_ld_i64: |
| return &r_L; |
| case INDEX_op_qemu_st_i64: |
| case INDEX_op_qemu_st_i32: |
| return &L_L; |
| |
| case INDEX_op_deposit_i32: |
| case INDEX_op_deposit_i64: |
| { |
| static const TCGTargetOpDef dep |
| = { .args_ct_str = { "r", "rZ", "r" } }; |
| return &dep; |
| } |
| case INDEX_op_movcond_i32: |
| case INDEX_op_movcond_i64: |
| { |
| static const TCGTargetOpDef movc |
| = { .args_ct_str = { "r", "r", "ri", "r", "0" } }; |
| static const TCGTargetOpDef movc_l |
| = { .args_ct_str = { "r", "r", "ri", "rI", "0" } }; |
| return (s390_facilities & FACILITY_LOAD_ON_COND2 ? &movc_l : &movc); |
| } |
| case INDEX_op_div2_i32: |
| case INDEX_op_div2_i64: |
| case INDEX_op_divu2_i32: |
| case INDEX_op_divu2_i64: |
| { |
| static const TCGTargetOpDef div2 |
| = { .args_ct_str = { "b", "a", "0", "1", "r" } }; |
| return &div2; |
| } |
| case INDEX_op_mulu2_i64: |
| { |
| static const TCGTargetOpDef mul2 |
| = { .args_ct_str = { "b", "a", "0", "r" } }; |
| return &mul2; |
| } |
| |
| case INDEX_op_add2_i32: |
| case INDEX_op_sub2_i32: |
| return (s390_facilities & FACILITY_EXT_IMM ? &a2_ri : &a2_r); |
| case INDEX_op_add2_i64: |
| case INDEX_op_sub2_i64: |
| return (s390_facilities & FACILITY_EXT_IMM ? &a2_rA : &a2_r); |
| |
| default: |
| break; |
| } |
| return NULL; |
| } |
| |
| static void query_s390_facilities(void) |
| { |
| unsigned long hwcap = qemu_getauxval(AT_HWCAP); |
| |
| /* Is STORE FACILITY LIST EXTENDED available? Honestly, I believe this |
| is present on all 64-bit systems, but let's check for it anyway. */ |
| if (hwcap & HWCAP_S390_STFLE) { |
| register int r0 __asm__("0"); |
| register void *r1 __asm__("1"); |
| |
| /* stfle 0(%r1) */ |
| r1 = &s390_facilities; |
| asm volatile(".word 0xb2b0,0x1000" |
| : "=r"(r0) : "0"(0), "r"(r1) : "memory", "cc"); |
| } |
| } |
| |
| static void tcg_target_init(TCGContext *s) |
| { |
| query_s390_facilities(); |
| |
| tcg_target_available_regs[TCG_TYPE_I32] = 0xffff; |
| tcg_target_available_regs[TCG_TYPE_I64] = 0xffff; |
| |
| tcg_target_call_clobber_regs = 0; |
| tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R0); |
| tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R1); |
| tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R2); |
| tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R3); |
| tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R4); |
| tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R5); |
| /* The r6 register is technically call-saved, but it's also a parameter |
| register, so it can get killed by setup for the qemu_st helper. */ |
| tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R6); |
| /* The return register can be considered call-clobbered. */ |
| tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R14); |
| |
| s->reserved_regs = 0; |
| tcg_regset_set_reg(s->reserved_regs, TCG_TMP0); |
| /* XXX many insns can't be used with R0, so we better avoid it for now */ |
| tcg_regset_set_reg(s->reserved_regs, TCG_REG_R0); |
| tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK); |
| if (USE_REG_TB) { |
| tcg_regset_set_reg(s->reserved_regs, TCG_REG_TB); |
| } |
| } |
| |
| #define FRAME_SIZE ((int)(TCG_TARGET_CALL_STACK_OFFSET \ |
| + TCG_STATIC_CALL_ARGS_SIZE \ |
| + CPU_TEMP_BUF_NLONGS * sizeof(long))) |
| |
| static void tcg_target_qemu_prologue(TCGContext *s) |
| { |
| /* stmg %r6,%r15,48(%r15) (save registers) */ |
| tcg_out_insn(s, RXY, STMG, TCG_REG_R6, TCG_REG_R15, TCG_REG_R15, 48); |
| |
| /* aghi %r15,-frame_size */ |
| tcg_out_insn(s, RI, AGHI, TCG_REG_R15, -FRAME_SIZE); |
| |
| tcg_set_frame(s, TCG_REG_CALL_STACK, |
| TCG_STATIC_CALL_ARGS_SIZE + TCG_TARGET_CALL_STACK_OFFSET, |
| CPU_TEMP_BUF_NLONGS * sizeof(long)); |
| |
| #ifndef CONFIG_SOFTMMU |
| if (guest_base >= 0x80000) { |
| tcg_out_movi_int(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, guest_base, true); |
| tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG); |
| } |
| #endif |
| |
| tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]); |
| if (USE_REG_TB) { |
| tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_TB, |
| tcg_target_call_iarg_regs[1]); |
| } |
| |
| /* br %r3 (go to TB) */ |
| tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, tcg_target_call_iarg_regs[1]); |
| |
| /* |
| * Return path for goto_ptr. Set return value to 0, a-la exit_tb, |
| * and fall through to the rest of the epilogue. |
| */ |
| s->code_gen_epilogue = s->code_ptr; |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R2, 0); |
| |
| /* TB epilogue */ |
| tb_ret_addr = s->code_ptr; |
| |
| /* lmg %r6,%r15,fs+48(%r15) (restore registers) */ |
| tcg_out_insn(s, RXY, LMG, TCG_REG_R6, TCG_REG_R15, TCG_REG_R15, |
| FRAME_SIZE + 48); |
| |
| /* br %r14 (return) */ |
| tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, TCG_REG_R14); |
| } |
| |
| static void tcg_out_nop_fill(tcg_insn_unit *p, int count) |
| { |
| memset(p, 0x07, count * sizeof(tcg_insn_unit)); |
| } |
| |
| typedef struct { |
| DebugFrameHeader h; |
| uint8_t fde_def_cfa[4]; |
| uint8_t fde_reg_ofs[18]; |
| } DebugFrame; |
| |
| /* We're expecting a 2 byte uleb128 encoded value. */ |
| QEMU_BUILD_BUG_ON(FRAME_SIZE >= (1 << 14)); |
| |
| #define ELF_HOST_MACHINE EM_S390 |
| |
| static const DebugFrame debug_frame = { |
| .h.cie.len = sizeof(DebugFrameCIE)-4, /* length after .len member */ |
| .h.cie.id = -1, |
| .h.cie.version = 1, |
| .h.cie.code_align = 1, |
| .h.cie.data_align = 8, /* sleb128 8 */ |
| .h.cie.return_column = TCG_REG_R14, |
| |
| /* Total FDE size does not include the "len" member. */ |
| .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset), |
| |
| .fde_def_cfa = { |
| 12, TCG_REG_CALL_STACK, /* DW_CFA_def_cfa %r15, ... */ |
| (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */ |
| (FRAME_SIZE >> 7) |
| }, |
| .fde_reg_ofs = { |
| 0x86, 6, /* DW_CFA_offset, %r6, 48 */ |
| 0x87, 7, /* DW_CFA_offset, %r7, 56 */ |
| 0x88, 8, /* DW_CFA_offset, %r8, 64 */ |
| 0x89, 9, /* DW_CFA_offset, %r92, 72 */ |
| 0x8a, 10, /* DW_CFA_offset, %r10, 80 */ |
| 0x8b, 11, /* DW_CFA_offset, %r11, 88 */ |
| 0x8c, 12, /* DW_CFA_offset, %r12, 96 */ |
| 0x8d, 13, /* DW_CFA_offset, %r13, 104 */ |
| 0x8e, 14, /* DW_CFA_offset, %r14, 112 */ |
| } |
| }; |
| |
| void tcg_register_jit(void *buf, size_t buf_size) |
| { |
| tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame)); |
| } |
