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Embed the names right into the array. For PIE this also reduces the number of base relocations in the final image. To avoid old gcc, when generating 32-bit code, bogusly warning about bounds being exceeded in the code processing Cs/Cw, Ct/Cx, and CD, an adjustment to EXTRACT_BITS() is needed: This macro shouldn't supply a 64-bit value, and it also doesn't need to - all operand fields to date are far more narrow than 32 bits. This in turn allows dropping a number of casts elsewhere. --- Of course this way the array items aren't a power of 2 in size anymore. While adding padding would still keep overall size below the original for 64-bit code, in 32-bit code the space savings would likely be lost. The alternative of setting NRC to 4 and hence omitting the nul character in some of the slots may not be liked, for requiring all use sites to then be aware of that aspect and using %.4s instead of plain %s. --- a/gas/config/tc-riscv.c +++ b/gas/config/tc-riscv.c @@ -951,7 +951,7 @@ hash_reg_name (enum reg_class class, con } static void -hash_reg_names (enum reg_class class, const char * const names[], unsigned n) +hash_reg_names (enum reg_class class, const char names[][NRC], unsigned n) { unsigned i; --- a/include/opcode/riscv.h +++ b/include/opcode/riscv.h @@ -355,7 +355,7 @@ static inline unsigned int riscv_insn_le /* Extract the operand given by FIELD from integer INSN. */ #define EXTRACT_OPERAND(FIELD, INSN) \ - EXTRACT_BITS ((INSN), OP_MASK_##FIELD, OP_SH_##FIELD) + ((unsigned int) EXTRACT_BITS ((INSN), OP_MASK_##FIELD, OP_SH_##FIELD)) /* Extract an unsigned immediate operand on position s with n bits. */ #define EXTRACT_U_IMM(n, s, l) \ @@ -575,14 +575,16 @@ enum riscv_seg_mstate MAP_INSN, /* Instructions. */ }; -extern const char * const riscv_gpr_names_numeric[NGPR]; -extern const char * const riscv_gpr_names_abi[NGPR]; -extern const char * const riscv_fpr_names_numeric[NFPR]; -extern const char * const riscv_fpr_names_abi[NFPR]; +#define NRC 5 /* Max characters in register names, incl nul. */ + +extern const char riscv_gpr_names_numeric[NGPR][NRC]; +extern const char riscv_gpr_names_abi[NGPR][NRC]; +extern const char riscv_fpr_names_numeric[NFPR][NRC]; +extern const char riscv_fpr_names_abi[NFPR][NRC]; extern const char * const riscv_rm[8]; extern const char * const riscv_pred_succ[16]; -extern const char * const riscv_vecr_names_numeric[NVECR]; -extern const char * const riscv_vecm_names_numeric[NVECM]; +extern const char riscv_vecr_names_numeric[NVECR][NRC]; +extern const char riscv_vecm_names_numeric[NVECM][NRC]; extern const char * const riscv_vsew[8]; extern const char * const riscv_vlmul[8]; extern const char * const riscv_vta[2]; --- a/opcodes/riscv-dis.c +++ b/opcodes/riscv-dis.c @@ -69,8 +69,8 @@ static enum riscv_seg_mstate last_map_st static asection *last_map_section = NULL; /* Register names as used by the disassembler. */ -static const char * const *riscv_gpr_names; -static const char * const *riscv_fpr_names; +static const char (*riscv_gpr_names)[NRC]; +static const char (*riscv_fpr_names)[NRC]; /* If set, disassemble as most general instruction. */ static bool no_aliases = false; @@ -502,7 +502,7 @@ print_insn_args (const char *oparg, insn case 'y': print (info->stream, dis_style_immediate, "0x%x", - (unsigned)EXTRACT_OPERAND (BS, l)); + EXTRACT_OPERAND (BS, l)); break; case 'z': @@ -511,12 +511,12 @@ print_insn_args (const char *oparg, insn case '>': print (info->stream, dis_style_immediate, "0x%x", - (unsigned)EXTRACT_OPERAND (SHAMT, l)); + EXTRACT_OPERAND (SHAMT, l)); break; case '<': print (info->stream, dis_style_immediate, "0x%x", - (unsigned)EXTRACT_OPERAND (SHAMTW, l)); + EXTRACT_OPERAND (SHAMTW, l)); break; case 'S': @@ -577,7 +577,7 @@ print_insn_args (const char *oparg, insn case 'Y': print (info->stream, dis_style_immediate, "0x%x", - (unsigned) EXTRACT_OPERAND (RNUM, l)); + EXTRACT_OPERAND (RNUM, l)); break; case 'Z': --- a/opcodes/riscv-opc.c +++ b/opcodes/riscv-opc.c @@ -26,7 +26,7 @@ /* Register names used by gas and objdump. */ -const char * const riscv_gpr_names_numeric[NGPR] = +const char riscv_gpr_names_numeric[NGPR][NRC] = { "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7", "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15", @@ -34,7 +34,7 @@ const char * const riscv_gpr_names_numer "x24", "x25", "x26", "x27", "x28", "x29", "x30", "x31" }; -const char * const riscv_gpr_names_abi[NGPR] = +const char riscv_gpr_names_abi[NGPR][NRC] = { "zero", "ra", "sp", "gp", "tp", "t0", "t1", "t2", "s0", "s1", "a0", "a1", "a2", "a3", "a4", "a5", @@ -42,7 +42,7 @@ const char * const riscv_gpr_names_abi[N "s8", "s9", "s10", "s11", "t3", "t4", "t5", "t6" }; -const char * const riscv_fpr_names_numeric[NFPR] = +const char riscv_fpr_names_numeric[NFPR][NRC] = { "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", @@ -50,7 +50,7 @@ const char * const riscv_fpr_names_numer "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31" }; -const char * const riscv_fpr_names_abi[NFPR] = +const char riscv_fpr_names_abi[NFPR][NRC] = { "ft0", "ft1", "ft2", "ft3", "ft4", "ft5", "ft6", "ft7", "fs0", "fs1", "fa0", "fa1", "fa2", "fa3", "fa4", "fa5", @@ -72,7 +72,7 @@ const char * const riscv_pred_succ[16] = }; /* RVV registers. */ -const char * const riscv_vecr_names_numeric[NVECR] = +const char riscv_vecr_names_numeric[NVECR][NRC] = { "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", @@ -81,7 +81,7 @@ const char * const riscv_vecr_names_nume }; /* RVV mask registers. */ -const char * const riscv_vecm_names_numeric[NVECM] = +const char riscv_vecm_names_numeric[NVECM][NRC] = { "v0.t" };