diff options
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/sparc64/fpu/fpu.c | 48 | ||||
| -rw-r--r-- | lib/libc/sparc64/fpu/fpu_emu.h | 2 |
2 files changed, 21 insertions, 29 deletions
diff --git a/lib/libc/sparc64/fpu/fpu.c b/lib/libc/sparc64/fpu/fpu.c index 74f07ec..7c8a3a9 100644 --- a/lib/libc/sparc64/fpu/fpu.c +++ b/lib/libc/sparc64/fpu/fpu.c @@ -97,7 +97,7 @@ __FBSDID("$FreeBSD$"); #define X8(x) X4(x),X4(x) #define X16(x) X8(x),X8(x) -static char cx_to_trapx[] = { +static const char cx_to_trapx[] = { X1(FSR_NX), X2(FSR_DZ), X4(FSR_UF), @@ -113,7 +113,8 @@ int __fpe_debug = 0; #endif #endif /* FPU_DEBUG */ -static int __fpu_execute(struct utrapframe *, struct fpemu *, u_int32_t, u_long); +static int __fpu_execute(struct utrapframe *, struct fpemu *, u_int32_t, + u_long); /* * Need to use an fpstate on the stack; we could switch, so we cannot safely @@ -169,7 +170,7 @@ __fpu_exception(struct utrapframe *uf) void __fpu_dumpfpn(struct fpn *fp) { - static char *class[] = { + static const char *const class[] = { "SNAN", "QNAN", "ZERO", "NUM", "INF" }; @@ -181,15 +182,11 @@ __fpu_dumpfpn(struct fpn *fp) } #endif -static int opmask[] = {0, 0, 1, 3}; +static const int opmask[] = {0, 0, 1, 3, 1}; /* Decode 5 bit register field depending on the type. */ #define RN_DECODE(tp, rn) \ - ((tp == FTYPE_DBL || tp == FTYPE_EXT ? INSFPdq_RN((rn)) : (rn)) & \ - ~opmask[tp]) - -/* Operand size in 32-bit registers. */ -#define OPSZ(tp) ((tp) == FTYPE_LNG ? 2 : (1 << (tp))) + ((tp) >= FTYPE_DBL ? INSFPdq_RN(rn) & ~opmask[tp] : (rn)) /* * Helper for forming the below case statements. Build only the op3 and opf @@ -209,8 +206,6 @@ static void __fpu_mov(struct fpemu *fe, int type, int rd, int rs2, u_int32_t nand, u_int32_t xor) { - u_int64_t tmp64; - int i; if (type == FTYPE_INT || type == FTYPE_SNG) __fpu_setreg(rd, (__fpu_getreg(rs2) & ~nand) ^ xor); @@ -219,13 +214,10 @@ __fpu_mov(struct fpemu *fe, int type, int rd, int rs2, u_int32_t nand, * Need to use the double versions to be able to access * the upper 32 fp registers. */ - for (i = 0; i < OPSZ(type); i += 2, rd += 2, rs2 += 2) { - tmp64 = __fpu_getreg64(rs2); - if (i == 0) - tmp64 = (tmp64 & ~((u_int64_t)nand << 32)) ^ - ((u_int64_t)xor << 32); - __fpu_setreg64(rd, tmp64); - } + __fpu_setreg64(rd, (__fpu_getreg64(rs2) & + ~((u_int64_t)nand << 32)) ^ ((u_int64_t)xor << 32)); + if (type == FTYPE_EXT) + __fpu_setreg64(rd + 2, __fpu_getreg64(rs2 + 2)); } } @@ -271,17 +263,17 @@ __fpu_cmpck(struct fpemu *fe) * multiply two integers this way. */ static int -__fpu_execute(struct utrapframe *uf, struct fpemu *fe, u_int32_t insn, u_long tstate) +__fpu_execute(struct utrapframe *uf, struct fpemu *fe, u_int32_t insn, + u_long tstate) { struct fpn *fp; int opf, rs1, rs2, rd, type, mask, cx, cond; u_long reg, fsr; u_int space[4]; - int i; /* * `Decode' and execute instruction. Start with no exceptions. - * The type of any opf opcode is in the bottom two bits, so we + * The type of almost any OPF opcode is in the bottom two bits, so we * squish them out here. */ opf = insn & (IF_MASK(IF_F3_OP3_SHIFT, IF_F3_OP3_BITS) | @@ -359,7 +351,7 @@ __fpu_execute(struct utrapframe *uf, struct fpemu *fe, u_int32_t insn, u_long ts __fpu_explode(fe, &fe->fe_f2, type, rs2); __fpu_compare(fe, 1, IF_F3_CC(insn)); return (__fpu_cmpck(fe)); - case FOP(INS2_FPop1, INSFP1_FMOV): /* these should all be pretty obvious */ + case FOP(INS2_FPop1, INSFP1_FMOV): __fpu_mov(fe, type, rd, rs2, 0, 0); return (0); case FOP(INS2_FPop1, INSFP1_FNEG): @@ -410,6 +402,7 @@ __fpu_execute(struct utrapframe *uf, struct fpemu *fe, u_int32_t insn, u_long ts case FOP(INS2_FPop1, INSFP1_FxTOd): case FOP(INS2_FPop1, INSFP1_FxTOq): type = FTYPE_LNG; + rs2 = RN_DECODE(type, IF_F3_RS2(insn)); __fpu_explode(fe, fp = &fe->fe_f1, type, rs2); /* sneaky; depends on instruction encoding */ type = (IF_F3_OPF(insn) >> 2) & 3; @@ -418,8 +411,7 @@ __fpu_execute(struct utrapframe *uf, struct fpemu *fe, u_int32_t insn, u_long ts case FOP(INS2_FPop1, INSFP1_FTOx): __fpu_explode(fe, fp = &fe->fe_f1, type, rs2); type = FTYPE_LNG; - mask = 1; /* needs 2 registers */ - rd = IF_F3_RD(insn) & ~mask; + rd = RN_DECODE(type, IF_F3_RD(insn)); break; case FOP(INS2_FPop1, INSFP1_FTOs): case FOP(INS2_FPop1, INSFP1_FTOd): @@ -457,10 +449,10 @@ __fpu_execute(struct utrapframe *uf, struct fpemu *fe, u_int32_t insn, u_long ts if (type == FTYPE_INT || type == FTYPE_SNG) __fpu_setreg(rd, space[0]); else { - for (i = 0; i < OPSZ(type); i += 2) { - __fpu_setreg64(rd + i, ((u_int64_t)space[i] << 32) | - space[i + 1]); - } + __fpu_setreg64(rd, ((u_int64_t)space[0] << 32) | space[1]); + if (type == FTYPE_EXT) + __fpu_setreg64(rd + 2, + ((u_int64_t)space[2] << 32) | space[3]); } return (0); /* success */ } diff --git a/lib/libc/sparc64/fpu/fpu_emu.h b/lib/libc/sparc64/fpu/fpu_emu.h index de156e2..82c96d8 100644 --- a/lib/libc/sparc64/fpu/fpu_emu.h +++ b/lib/libc/sparc64/fpu/fpu_emu.h @@ -140,7 +140,7 @@ struct fpn { #define FTYPE_SNG INSFP_s #define FTYPE_DBL INSFP_d #define FTYPE_EXT INSFP_q -#define FTYPE_LNG -1 +#define FTYPE_LNG 5 /* * Emulator state. |
