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Most x86-64 tests now work; only on error in test1-3.

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I've had to introduce the XMM1 register to get the calling convention
to work properly, unfortunately this has broken a fair bit of code
which assumes that only XMM0 is used.
This commit is contained in:
James Lyon 2013-04-19 15:33:16 +01:00
parent b961ba5396
commit 0e17671f72
3 changed files with 129 additions and 67 deletions
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69
tccgen.c
View File

@ -88,7 +88,7 @@ ST_INLN int is_float(int t)
{
int bt;
bt = t & VT_BTYPE;
return bt == VT_LDOUBLE || bt == VT_DOUBLE || bt == VT_FLOAT;
return bt == VT_LDOUBLE || bt == VT_DOUBLE || bt == VT_FLOAT || bt == VT_QFLOAT;
}
/* we use our own 'finite' function to avoid potential problems with
@ -688,9 +688,7 @@ static void gbound(void)
ST_FUNC int gv(int rc)
{
int r, bit_pos, bit_size, size, align, i;
#ifndef TCC_TARGET_X86_64
int rc2;
#endif
/* NOTE: get_reg can modify vstack[] */
if (vtop->type.t & VT_BITFIELD) {
@ -765,11 +763,14 @@ ST_FUNC int gv(int rc)
#endif
r = vtop->r & VT_VALMASK;
#ifndef TCC_TARGET_X86_64
rc2 = RC_INT;
if (rc == RC_IRET)
rc2 = RC_LRET;
#ifdef TCC_TARGET_X86_64
else if (rc == RC_FRET)
rc2 = RC_QRET;
#endif
/* need to reload if:
- constant
- lvalue (need to dereference pointer)
@ -777,18 +778,25 @@ ST_FUNC int gv(int rc)
if (r >= VT_CONST
|| (vtop->r & VT_LVAL)
|| !(reg_classes[r] & rc)
#ifndef TCC_TARGET_X86_64
#ifdef TCC_TARGET_X86_64
|| ((vtop->type.t & VT_BTYPE) == VT_QLONG && !(reg_classes[vtop->r2] & rc2))
|| ((vtop->type.t & VT_BTYPE) == VT_QFLOAT && !(reg_classes[vtop->r2] & rc2))
#else
|| ((vtop->type.t & VT_BTYPE) == VT_LLONG && !(reg_classes[vtop->r2] & rc2))
#endif
)
{
r = get_reg(rc);
#ifndef TCC_TARGET_X86_64
#ifdef TCC_TARGET_X86_64
if (((vtop->type.t & VT_BTYPE) == VT_QLONG) || ((vtop->type.t & VT_BTYPE) == VT_QFLOAT)) {
#else
if ((vtop->type.t & VT_BTYPE) == VT_LLONG) {
#endif
int r2;
unsigned long long ll;
/* two register type load : expand to two words
temporarily */
#ifndef TCC_TARGET_X86_64
if ((vtop->r & (VT_VALMASK | VT_LVAL)) == VT_CONST) {
/* load constant */
ll = vtop->c.ull;
@ -796,23 +804,32 @@ ST_FUNC int gv(int rc)
load(r, vtop);
vtop->r = r; /* save register value */
vpushi(ll >> 32); /* second word */
} else if (r >= VT_CONST || /* XXX: test to VT_CONST incorrect ? */
} else
#endif
if (r >= VT_CONST || /* XXX: test to VT_CONST incorrect ? */
(vtop->r & VT_LVAL)) {
#ifdef TCC_TARGET_X86_64
int addr_type = VT_LLONG, load_size = 8, load_type = ((vtop->type.t & VT_BTYPE) == VT_QLONG) ? VT_LLONG : VT_DOUBLE;
#else
int addr_type = VT_INT, load_size = 4, load_type = VT_INT;
#endif
/* We do not want to modifier the long long
pointer here, so the safest (and less
efficient) is to save all the other registers
in the stack. XXX: totally inefficient. */
save_regs(1);
/* load from memory */
vtop->type.t = load_type;
load(r, vtop);
vdup();
vtop[-1].r = r; /* save register value */
/* increment pointer to get second word */
vtop->type.t = VT_INT;
vtop->type.t = addr_type;
gaddrof();
vpushi(4);
vpushi(load_size);
gen_op('+');
vtop->r |= VT_LVAL;
vtop->type.t = load_type;
} else {
/* move registers */
load(r, vtop);
@ -827,9 +844,7 @@ ST_FUNC int gv(int rc)
vpop();
/* write second register */
vtop->r2 = r2;
} else
#endif
if ((vtop->r & VT_LVAL) && !is_float(vtop->type.t)) {
} else if ((vtop->r & VT_LVAL) && !is_float(vtop->type.t)) {
int t1, t;
/* lvalue of scalar type : need to use lvalue type
because of possible cast */
@ -2479,6 +2494,8 @@ ST_FUNC void vstore(void)
#ifdef TCC_TARGET_X86_64
if ((ft & VT_BTYPE) == VT_LDOUBLE) {
rc = RC_ST0;
} else if ((ft & VT_BTYPE) == VT_QFLOAT) {
rc = RC_FRET;
}
#endif
}
@ -2497,29 +2514,29 @@ ST_FUNC void vstore(void)
load(t, &sv);
vtop[-1].r = t | VT_LVAL;
}
store(r, vtop - 1);
/* two word case handling : store second register at word + 4 (or +8 for x86-64) */
#ifdef TCC_TARGET_X86_64
if ((ft & VT_BTYPE) == VT_QLONG) {
if (((ft & VT_BTYPE) == VT_QLONG) || ((ft & VT_BTYPE) == VT_QFLOAT)) {
int addr_type = VT_LLONG, load_size = 8, load_type = ((vtop->type.t & VT_BTYPE) == VT_QLONG) ? VT_LLONG : VT_DOUBLE;
#else
if ((ft & VT_BTYPE) == VT_LLONG) {
int addr_type = VT_INT, load_size = 4, load_type = VT_INT;
#endif
vtop[-1].type.t = load_type;
store(r, vtop - 1);
vswap();
/* convert to int to increment easily */
#ifdef TCC_TARGET_X86_64
vtop->type.t = VT_LLONG;
vtop->type.t = addr_type;
gaddrof();
vpushi(8);
#else
vtop->type.t = VT_INT;
gaddrof();
vpushi(4);
#endif
vpushi(load_size);
gen_op('+');
vtop->r |= VT_LVAL;
vswap();
vtop[-1].type.t = load_type;
/* XXX: it works because r2 is spilled last ! */
store(vtop->r2, vtop - 1);
} else {
store(r, vtop - 1);
}
}
vswap();
@ -3897,8 +3914,16 @@ ST_FUNC void unary(void)
/* return in register */
if (is_float(ret.type.t)) {
ret.r = reg_fret(ret.type.t);
#ifdef TCC_TARGET_X86_64
if ((ret.type.t & VT_BTYPE) == VT_QFLOAT)
ret.r2 = REG_QRET;
#endif
} else {
#ifdef TCC_TARGET_X86_64
if ((ret.type.t & VT_BTYPE) == VT_QLONG)
#else
if ((ret.type.t & VT_BTYPE) == VT_LLONG)
#endif
ret.r2 = REG_LRET;
ret.r = REG_IRET;
}

4
tests/abitest.c
View File

@ -88,8 +88,8 @@ static int ret_2float_test(void) {
/*
* ret_2double_test:
*
* On x86-64, a struct with 2 doubles should be packed into a single
* SSE register (this tests VT_QFLOAT).
* On x86-64, a struct with 2 doubles should be passed in two SSE
* registers.
*/
typedef struct ret_2double_test_type_s {double x, y;} ret_2double_test_type;
typedef ret_2double_test_type (*ret_2double_test_function_type) (ret_2double_test_type);

123
x86_64-gen.c
View File

@ -23,7 +23,7 @@
#ifdef TARGET_DEFS_ONLY
/* number of available registers */
#define NB_REGS 5
#define NB_REGS 6
#define NB_ASM_REGS 8
/* a register can belong to several classes. The classes must be
@ -39,10 +39,12 @@
#define RC_R10 0x0400
#define RC_R11 0x0800
#define RC_XMM0 0x0020
#define RC_ST0 0x0040 /* only for long double */
#define RC_XMM1 0x0040
#define RC_ST0 0x0080 /* only for long double */
#define RC_IRET RC_RAX /* function return: integer register */
#define RC_LRET RC_RDX /* function return: second integer register */
#define RC_FRET RC_XMM0 /* function return: float register */
#define RC_QRET RC_XMM1 /* function return: second float register */
/* pretty names for the registers */
enum {
@ -50,7 +52,8 @@ enum {
TREG_RCX = 1,
TREG_RDX = 2,
TREG_XMM0 = 3,
TREG_ST0 = 4,
TREG_XMM1 = 4,
TREG_ST0 = 5,
TREG_RSI = 6,
TREG_RDI = 7,
@ -70,6 +73,7 @@ enum {
#define REG_IRET TREG_RAX /* single word int return register */
#define REG_LRET TREG_RDX /* second word return register (for long long) */
#define REG_FRET TREG_XMM0 /* float return register */
#define REG_QRET TREG_XMM1 /* second float return register */
/* defined if function parameters must be evaluated in reverse order */
#define INVERT_FUNC_PARAMS
@ -108,6 +112,7 @@ ST_DATA const int reg_classes[NB_REGS+7] = {
/* ecx */ RC_INT | RC_RCX,
/* edx */ RC_INT | RC_RDX,
/* xmm0 */ RC_FLOAT | RC_XMM0,
/* xmm1 */ RC_FLOAT | RC_XMM1,
/* st0 */ RC_ST0,
0,
0,
@ -375,7 +380,8 @@ void load(int r, SValue *sv)
if ((ft & VT_BTYPE) == VT_FLOAT) {
b = 0x6e0f66, r = 0; /* movd */
} else if ((ft & VT_BTYPE) == VT_DOUBLE) {
b = 0x7e0ff3, r = 0; /* movq */
b = 0x7e0ff3; /* movq */
r -= TREG_XMM0;
} else if ((ft & VT_BTYPE) == VT_LDOUBLE) {
b = 0xdb, r = 5; /* fldt */
} else if ((ft & VT_TYPE) == VT_BYTE) {
@ -387,6 +393,9 @@ void load(int r, SValue *sv)
} else if ((ft & VT_TYPE) == (VT_SHORT | VT_UNSIGNED)) {
b = 0xb70f; /* movzwl */
} else {
assert(((ft & VT_BTYPE) == VT_INT) || ((ft & VT_BTYPE) == VT_LLONG)
|| ((ft & VT_BTYPE) == VT_PTR) || ((ft & VT_BTYPE) == VT_ENUM)
|| ((ft & VT_BTYPE) == VT_FUNC));
ll = is64_type(ft);
b = 0x8b;
}
@ -450,18 +459,30 @@ void load(int r, SValue *sv)
orex(0,r,0,0);
oad(0xb8 + REG_VALUE(r), t ^ 1); /* mov $0, r */
} else if (v != r) {
if (r == TREG_XMM0) {
assert(v == TREG_ST0);
/* gen_cvt_ftof(VT_DOUBLE); */
o(0xf0245cdd); /* fstpl -0x10(%rsp) */
/* movsd -0x10(%rsp),%xmm0 */
o(0x44100ff2);
o(0xf024);
if ((r == TREG_XMM0) || (r == TREG_XMM1)) {
if (v == TREG_ST0) {
/* gen_cvt_ftof(VT_DOUBLE); */
o(0xf0245cdd); /* fstpl -0x10(%rsp) */
/* movsd -0x10(%rsp),%xmmN */
o(0x100ff2);
o(0x44 + ((r - TREG_XMM0) << 3)); /* %xmmN */
o(0xf024);
} else {
assert((v == TREG_XMM0) || (v == TREG_XMM1));
if ((ft & VT_BTYPE) == VT_FLOAT) {
o(0x100ff3);
} else {
assert((ft & VT_BTYPE) == VT_DOUBLE);
o(0x100ff2);
}
o(0xc0 + (v - TREG_XMM0) + ((r - TREG_XMM0) << 3));
}
} else if (r == TREG_ST0) {
assert(v == TREG_XMM0);
assert((v == TREG_XMM0) || (v == TREG_XMM1));
/* gen_cvt_ftof(VT_LDOUBLE); */
/* movsd %xmm0,-0x10(%rsp) */
o(0x44110ff2);
o(0x110ff2);
o(0x44 + ((r - TREG_XMM0) << 3)); /* %xmmN */
o(0xf024);
o(0xf02444dd); /* fldl -0x10(%rsp) */
} else {
@ -510,7 +531,7 @@ void store(int r, SValue *v)
o(0x66);
o(pic);
o(0xd60f); /* movq */
r = 0;
r -= TREG_XMM0;
} else if (bt == VT_LDOUBLE) {
o(0xc0d9); /* fld %st(0) */
o(pic);
@ -679,7 +700,7 @@ void gfunc_call(int nb_args)
struct_size += size;
} else if (is_sse_float(vtop->type.t)) {
gv(RC_FLOAT); /* only one float register */
gv(RC_XMM0); /* only one float register */
j = --gen_reg;
if (j >= REGN) {
/* movq %xmm0, j*8(%rsp) */
@ -861,6 +882,7 @@ static X86_64_Mode classify_x86_64_inner(CType *ty) {
case VT_LLONG:
case VT_BOOL:
case VT_PTR:
case VT_FUNC:
case VT_ENUM: return x86_64_mode_integer;
case VT_FLOAT:
@ -881,6 +903,8 @@ static X86_64_Mode classify_x86_64_inner(CType *ty) {
return mode;
}
assert(0);
}
static X86_64_Mode classify_x86_64_arg(CType *ty, CType *ret, int *psize, int *reg_count) {
@ -963,6 +987,14 @@ static const uint8_t arg_regs[REGN] = {
TREG_RDI, TREG_RSI, TREG_RDX, TREG_RCX, TREG_R8, TREG_R9
};
static int arg_prepare_reg(int idx) {
if (idx == 2 || idx == 3)
/* idx=2: r10, idx=3: r11 */
return idx + 8;
else
return arg_regs[idx];
}
/* Generate function call. The function address is pushed first, then
all the parameters in call order. This functions pops all the
parameters and the function address. */
@ -1051,7 +1083,7 @@ void gfunc_call(int nb_args)
case x86_64_mode_sse:
if (sse_reg > 8) {
gv(RC_FLOAT);
gv(RC_XMM0);
o(0x50); /* push $rax */
/* movq %xmm0, (%rsp) */
o(0x04d60f66);
@ -1097,15 +1129,18 @@ void gfunc_call(int nb_args)
break;
case x86_64_mode_sse:
if (sse_reg > 8) {
sse_reg -= reg_count;
} else {
for (j = 0; j < reg_count; ++j) {
--sse_reg;
gv(RC_FLOAT); /* only one float register */
sse_reg -= reg_count;
if (sse_reg + reg_count <= 8) {
gv(RC_XMM0); /* only one float register */
if (sse_reg) { /* avoid redundant movaps %xmm0, %xmm0 */
/* movaps %xmm0, %xmmN */
o(0x280f);
o(0xc0 + (sse_reg << 3));
if (reg_count == 2) {
/* movaps %xmm1, %xmmN */
o(0x280f);
o(0xc1 + ((sse_reg+1) << 3));
}
}
}
break;
@ -1113,16 +1148,17 @@ void gfunc_call(int nb_args)
case x86_64_mode_integer:
/* simple type */
/* XXX: implicit cast ? */
if (gen_reg > 8) {
gen_reg -= reg_count;
} else {
for (j = 0; j < reg_count; ++j) {
--gen_reg;
int d = arg_regs[gen_reg];
r = gv(RC_INT);
if (gen_reg == 2 || gen_reg == 3)
/* gen_reg=2: r10, gen_reg=3: r11 */
d = gen_reg + 8;
gen_reg -= reg_count;
if (gen_reg + reg_count <= REGN) {
r = gv((reg_count == 1) ? RC_INT : RC_IRET);
int d = arg_prepare_reg(gen_reg);
orex(1,d,r,0x89); /* mov */
o(0xc0 + REG_VALUE(r) * 8 + REG_VALUE(d));
if (reg_count == 2) {
/* Second word of two-word value should always be in rdx
this case is handled via RC_IRET */
r = TREG_RDX;
d = arg_prepare_reg(gen_reg+1);
orex(1,d,r,0x89); /* mov */
o(0xc0 + REG_VALUE(r) * 8 + REG_VALUE(d));
}
@ -1263,13 +1299,13 @@ void gfunc_prolog(CType *func_type)
case x86_64_mode_sse:
if (sse_param_index + reg_count <= 8) {
/* save arguments passed by register */
loc -= reg_count * 8;
param_addr = loc;
for (i = 0; i < reg_count; ++i) {
loc -= 8;
o(0xd60f66); /* movq */
gen_modrm(sse_param_index, VT_LOCAL, NULL, loc);
gen_modrm(sse_param_index, VT_LOCAL, NULL, param_addr + i*8);
++sse_param_index;
}
param_addr = loc;
} else {
param_addr = addr;
addr += size;
@ -1286,11 +1322,12 @@ void gfunc_prolog(CType *func_type)
case x86_64_mode_integer: {
if (reg_param_index + reg_count <= REGN) {
/* save arguments passed by register */
loc -= reg_count * 8;
param_addr = loc;
for (i = 0; i < reg_count; ++i) {
push_arg_reg(reg_param_index);
gen_modrm64(0x89, arg_regs[reg_param_index], VT_LOCAL, NULL, param_addr + i*8);
++reg_param_index;
}
param_addr = loc;
} else {
param_addr = addr;
addr += size;
@ -1547,12 +1584,12 @@ void gen_opl(int op)
/* generate a floating point operation 'v = t1 op t2' instruction. The
two operands are guaranted to have the same floating point type */
/* XXX: need to use ST1 too */
/* XXX: need to use ST1 and XMM1 too */
void gen_opf(int op)
{
int a, ft, fc, swapped, r;
int float_type =
(vtop->type.t & VT_BTYPE) == VT_LDOUBLE ? RC_ST0 : RC_FLOAT;
(vtop->type.t & VT_BTYPE) == VT_LDOUBLE ? RC_ST0 : RC_XMM0; /* to avoid xmm1 handling for now */
/* convert constants to memory references */
if ((vtop[-1].r & (VT_VALMASK | VT_LVAL)) == VT_CONST) {
@ -1803,9 +1840,9 @@ void gen_cvt_ftof(int t)
ft = vtop->type.t;
bt = ft & VT_BTYPE;
tbt = t & VT_BTYPE;
if (bt == VT_FLOAT) {
gv(RC_FLOAT);
gv(RC_XMM0); /* to avoid rewriting to handle xmm1 for now */
if (tbt == VT_DOUBLE) {
o(0xc0140f); /* unpcklps */
o(0xc05a0f); /* cvtps2pd */
@ -1817,7 +1854,7 @@ void gen_cvt_ftof(int t)
vtop->r = TREG_ST0;
}
} else if (bt == VT_DOUBLE) {
gv(RC_FLOAT);
gv(RC_XMM0); /* to avoid rewriting to handle xmm1 for now */
if (tbt == VT_FLOAT) {
o(0xc0140f66); /* unpcklpd */
o(0xc05a0f66); /* cvtpd2ps */
@ -1857,7 +1894,7 @@ void gen_cvt_ftoi(int t)
bt = VT_DOUBLE;
}
gv(RC_FLOAT);
gv(RC_XMM0);
if (t != VT_INT)
size = 8;
else