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mesa/src/gallium/auxiliary/rtasm/rtasm_ppc.c

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/**************************************************************************
*
* Copyright (C) 2008 Tungsten Graphics, Inc. All Rights Reserved.
* Copyright (C) 2009 VMware, Inc. All Rights Reserved.
*
* 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
* BRIAN PAUL 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.
*
**************************************************************************/
/**
* PPC code generation.
* For reference, see http://www.power.org/resources/reading/PowerISA_V2.05.pdf
* ABI info: http://www.cs.utsa.edu/~whaley/teach/cs6463FHPO/LEC/lec12_ho.pdf
*
* Other PPC refs:
* http://www-01.ibm.com/chips/techlib/techlib.nsf/techdocs/852569B20050FF778525699600719DF2
* http://www.ibm.com/developerworks/eserver/library/es-archguide-v2.html
* http://www.freescale.com/files/product/doc/MPCFPE32B.pdf
*
* \author Brian Paul
*/
#include <stdio.h>
#include "util/u_memory.h"
#include "pipe/p_debug.h"
#include "rtasm_execmem.h"
#include "rtasm_ppc.h"
void
ppc_init_func(struct ppc_function *p)
{
uint i;
memset(p, 0, sizeof(*p));
p->num_inst = 0;
p->max_inst = 100; /* first guess at buffer size */
p->store = rtasm_exec_malloc(p->max_inst * PPC_INST_SIZE);
p->reg_used = 0x0;
p->fp_used = 0x0;
p->vec_used = 0x0;
p->print = FALSE;
p->indent = 0;
/* only allow using gp registers 3..12 for now */
for (i = 0; i < 3; i++)
ppc_reserve_register(p, i);
for (i = 12; i < PPC_NUM_REGS; i++)
ppc_reserve_register(p, i);
}
void
ppc_release_func(struct ppc_function *p)
{
assert(p->num_inst <= p->max_inst);
if (p->store != NULL) {
rtasm_exec_free(p->store);
}
p->store = NULL;
}
uint
ppc_num_instructions(const struct ppc_function *p)
{
return p->num_inst;
}
void (*ppc_get_func(struct ppc_function *p))(void)
{
#if 0
DUMP_END();
if (DISASSEM && p->store)
debug_printf("disassemble %p %p\n", p->store, p->csr);
if (p->store == p->error_overflow)
return (void (*)(void)) NULL;
else
#endif
return (void (*)(void)) p->store;
}
void
ppc_dump_func(const struct ppc_function *p)
{
uint i;
for (i = 0; i < p->num_inst; i++) {
debug_printf("%3u: 0x%08x\n", i, p->store[i]);
}
}
void
ppc_print_code(struct ppc_function *p, boolean enable)
{
p->print = enable;
}
void
ppc_indent(struct ppc_function *p, int spaces)
{
p->indent += spaces;
}
static void
indent(const struct ppc_function *p)
{
int i;
for (i = 0; i < p->indent; i++) {
putchar(' ');
}
}
void
ppc_comment(struct ppc_function *p, int rel_indent, const char *s)
{
if (p->print) {
p->indent += rel_indent;
indent(p);
p->indent -= rel_indent;
printf("# %s\n", s);
}
}
/**
* Mark a register as being unavailable.
*/
int
ppc_reserve_register(struct ppc_function *p, int reg)
{
assert(reg < PPC_NUM_REGS);
p->reg_used |= (1 << reg);
return reg;
}
/**
* Allocate a general purpose register.
* \return register index or -1 if none left.
*/
int
ppc_allocate_register(struct ppc_function *p)
{
unsigned i;
for (i = 0; i < PPC_NUM_REGS; i++) {
const uint64_t mask = 1 << i;
if ((p->reg_used & mask) == 0) {
p->reg_used |= mask;
return i;
}
}
printf("OUT OF PPC registers!\n");
return -1;
}
/**
* Mark the given general purpose register as "unallocated".
*/
void
ppc_release_register(struct ppc_function *p, int reg)
{
assert(reg < PPC_NUM_REGS);
assert(p->reg_used & (1 << reg));
p->reg_used &= ~(1 << reg);
}
/**
* Allocate a floating point register.
* \return register index or -1 if none left.
*/
int
ppc_allocate_fp_register(struct ppc_function *p)
{
unsigned i;
for (i = 0; i < PPC_NUM_FP_REGS; i++) {
const uint64_t mask = 1 << i;
if ((p->fp_used & mask) == 0) {
p->fp_used |= mask;
return i;
}
}
printf("OUT OF PPC FP registers!\n");
return -1;
}
/**
* Mark the given floating point register as "unallocated".
*/
void
ppc_release_fp_register(struct ppc_function *p, int reg)
{
assert(reg < PPC_NUM_FP_REGS);
assert(p->fp_used & (1 << reg));
p->fp_used &= ~(1 << reg);
}
/**
* Allocate a vector register.
* \return register index or -1 if none left.
*/
int
ppc_allocate_vec_register(struct ppc_function *p)
{
unsigned i;
for (i = 0; i < PPC_NUM_VEC_REGS; i++) {
const uint64_t mask = 1 << i;
if ((p->vec_used & mask) == 0) {
p->vec_used |= mask;
return i;
}
}
printf("OUT OF PPC VEC registers!\n");
return -1;
}
/**
* Mark the given vector register as "unallocated".
*/
void
ppc_release_vec_register(struct ppc_function *p, int reg)
{
assert(reg < PPC_NUM_VEC_REGS);
assert(p->vec_used & (1 << reg));
p->vec_used &= ~(1 << reg);
}
/**
* Append instruction to instruction buffer. Grow buffer if out of room.
*/
static void
emit_instruction(struct ppc_function *p, uint32_t inst_bits)
{
if (!p->store)
return; /* out of memory, drop the instruction */
if (p->num_inst == p->max_inst) {
/* allocate larger buffer */
uint32_t *newbuf;
p->max_inst *= 2; /* 2x larger */
newbuf = rtasm_exec_malloc(p->max_inst * PPC_INST_SIZE);
if (newbuf) {
memcpy(newbuf, p->store, p->num_inst * PPC_INST_SIZE);
}
rtasm_exec_free(p->store);
p->store = newbuf;
if (!p->store) {
/* out of memory */
p->num_inst = 0;
return;
}
}
p->store[p->num_inst++] = inst_bits;
}
union vx_inst {
uint32_t bits;
struct {
unsigned op:6;
unsigned vD:5;
unsigned vA:5;
unsigned vB:5;
unsigned op2:11;
} inst;
};
static INLINE void
emit_vx(struct ppc_function *p, uint op2, uint vD, uint vA, uint vB,
const char *format, boolean transpose)
{
union vx_inst inst;
inst.inst.op = 4;
inst.inst.vD = vD;
inst.inst.vA = vA;
inst.inst.vB = vB;
inst.inst.op2 = op2;
emit_instruction(p, inst.bits);
if (p->print) {
indent(p);
if (transpose)
printf(format, vD, vB, vA);
else
printf(format, vD, vA, vB);
}
}
union vxr_inst {
uint32_t bits;
struct {
unsigned op:6;
unsigned vD:5;
unsigned vA:5;
unsigned vB:5;
unsigned rC:1;
unsigned op2:10;
} inst;
};
static INLINE void
emit_vxr(struct ppc_function *p, uint op2, uint vD, uint vA, uint vB,
const char *format)
{
union vxr_inst inst;
inst.inst.op = 4;
inst.inst.vD = vD;
inst.inst.vA = vA;
inst.inst.vB = vB;
inst.inst.rC = 0;
inst.inst.op2 = op2;
emit_instruction(p, inst.bits);
if (p->print) {
indent(p);
printf(format, vD, vA, vB);
}
}
union va_inst {
uint32_t bits;
struct {
unsigned op:6;
unsigned vD:5;
unsigned vA:5;
unsigned vB:5;
unsigned vC:5;
unsigned op2:6;
} inst;
};
static INLINE void
emit_va(struct ppc_function *p, uint op2, uint vD, uint vA, uint vB, uint vC,
const char *format)
{
union va_inst inst;
inst.inst.op = 4;
inst.inst.vD = vD;
inst.inst.vA = vA;
inst.inst.vB = vB;
inst.inst.vC = vC;
inst.inst.op2 = op2;
emit_instruction(p, inst.bits);
if (p->print) {
indent(p);
printf(format, vD, vA, vB, vC);
}
}
union i_inst {
uint32_t bits;
struct {
unsigned op:6;
unsigned li:24;
unsigned aa:1;
unsigned lk:1;
} inst;
};
static INLINE void
emit_i(struct ppc_function *p, uint op, uint li, uint aa, uint lk)
{
union i_inst inst;
inst.inst.op = op;
inst.inst.li = li;
inst.inst.aa = aa;
inst.inst.lk = lk;
emit_instruction(p, inst.bits);
}
union xl_inst {
uint32_t bits;
struct {
unsigned op:6;
unsigned bo:5;
unsigned bi:5;
unsigned unused:3;
unsigned bh:2;
unsigned op2:10;
unsigned lk:1;
} inst;
};
static INLINE void
emit_xl(struct ppc_function *p, uint op, uint bo, uint bi, uint bh,
uint op2, uint lk)
{
union xl_inst inst;
inst.inst.op = op;
inst.inst.bo = bo;
inst.inst.bi = bi;
inst.inst.unused = 0x0;
inst.inst.bh = bh;
inst.inst.op2 = op2;
inst.inst.lk = lk;
emit_instruction(p, inst.bits);
}
static INLINE void
dump_xl(const char *name, uint inst)
{
union xl_inst i;
i.bits = inst;
debug_printf("%s = 0x%08x\n", name, inst);
debug_printf(" op: %d 0x%x\n", i.inst.op, i.inst.op);
debug_printf(" bo: %d 0x%x\n", i.inst.bo, i.inst.bo);
debug_printf(" bi: %d 0x%x\n", i.inst.bi, i.inst.bi);
debug_printf(" unused: %d 0x%x\n", i.inst.unused, i.inst.unused);
debug_printf(" bh: %d 0x%x\n", i.inst.bh, i.inst.bh);
debug_printf(" op2: %d 0x%x\n", i.inst.op2, i.inst.op2);
debug_printf(" lk: %d 0x%x\n", i.inst.lk, i.inst.lk);
}
union x_inst {
uint32_t bits;
struct {
unsigned op:6;
unsigned vrs:5;
unsigned ra:5;
unsigned rb:5;
unsigned op2:10;
unsigned unused:1;
} inst;
};
static INLINE void
emit_x(struct ppc_function *p, uint op, uint vrs, uint ra, uint rb, uint op2,
const char *format)
{
union x_inst inst;
inst.inst.op = op;
inst.inst.vrs = vrs;
inst.inst.ra = ra;
inst.inst.rb = rb;
inst.inst.op2 = op2;
inst.inst.unused = 0x0;
emit_instruction(p, inst.bits);
if (p->print) {
indent(p);
printf(format, vrs, ra, rb);
}
}
union d_inst {
uint32_t bits;
struct {
unsigned op:6;
unsigned rt:5;
unsigned ra:5;
unsigned si:16;
} inst;
};
static INLINE void
emit_d(struct ppc_function *p, uint op, uint rt, uint ra, int si,
const char *format, boolean transpose)
{
union d_inst inst;
assert(si >= -32768);
assert(si <= 32767);
inst.inst.op = op;
inst.inst.rt = rt;
inst.inst.ra = ra;
inst.inst.si = (unsigned) (si & 0xffff);
emit_instruction(p, inst.bits);
if (p->print) {
indent(p);
if (transpose)
printf(format, rt, si, ra);
else
printf(format, rt, ra, si);
}
}
union a_inst {
uint32_t bits;
struct {
unsigned op:6;
unsigned frt:5;
unsigned fra:5;
unsigned frb:5;
unsigned unused:5;
unsigned op2:5;
unsigned rc:1;
} inst;
};
static INLINE void
emit_a(struct ppc_function *p, uint op, uint frt, uint fra, uint frb, uint op2,
uint rc, const char *format)
{
union a_inst inst;
inst.inst.op = op;
inst.inst.frt = frt;
inst.inst.fra = fra;
inst.inst.frb = frb;
inst.inst.unused = 0x0;
inst.inst.op2 = op2;
inst.inst.rc = rc;
emit_instruction(p, inst.bits);
if (p->print) {
indent(p);
printf(format, frt, fra, frb);
}
}
union xo_inst {
uint32_t bits;
struct {
unsigned op:6;
unsigned rt:5;
unsigned ra:5;
unsigned rb:5;
unsigned oe:1;
unsigned op2:9;
unsigned rc:1;
} inst;
};
static INLINE void
emit_xo(struct ppc_function *p, uint op, uint rt, uint ra, uint rb, uint oe,
uint op2, uint rc, const char *format)
{
union xo_inst inst;
inst.inst.op = op;
inst.inst.rt = rt;
inst.inst.ra = ra;
inst.inst.rb = rb;
inst.inst.oe = oe;
inst.inst.op2 = op2;
inst.inst.rc = rc;
emit_instruction(p, inst.bits);
if (p->print) {
indent(p);
printf(format, rt, ra, rb);
}
}
/**
** float vector arithmetic
**/
/** vector float add */
void
ppc_vaddfp(struct ppc_function *p, uint vD, uint vA, uint vB)
{
emit_vx(p, 10, vD, vA, vB, "vaddfp\t%u, v%u, v%u\n", FALSE);
}
/** vector float substract */
void
ppc_vsubfp(struct ppc_function *p, uint vD, uint vA, uint vB)
{
emit_vx(p, 74, vD, vA, vB, "vsubfp\tv%u, v%u, v%u\n", FALSE);
}
/** vector float min */
void
ppc_vminfp(struct ppc_function *p, uint vD, uint vA, uint vB)
{
emit_vx(p, 1098, vD, vA, vB, "vminfp\tv%u, v%u, v%u\n", FALSE);
}
/** vector float max */
void
ppc_vmaxfp(struct ppc_function *p, uint vD, uint vA, uint vB)
{
emit_vx(p, 1034, vD, vA, vB, "vmaxfp\tv%u, v%u, v%u\n", FALSE);
}
/** vector float mult add: vD = vA * vB + vC */
void
ppc_vmaddfp(struct ppc_function *p, uint vD, uint vA, uint vB, uint vC)
{
/* note arg order */
emit_va(p, 46, vD, vA, vC, vB, "vmaddfp\tv%u, v%u, v%u, v%u\n");
}
/** vector float negative mult subtract: vD = vA - vB * vC */
void
ppc_vnmsubfp(struct ppc_function *p, uint vD, uint vA, uint vB, uint vC)
{
/* note arg order */
emit_va(p, 47, vD, vB, vA, vC, "vnmsubfp\tv%u, v%u, v%u, v%u\n");
}
/** vector float compare greater than */
void
ppc_vcmpgtfpx(struct ppc_function *p, uint vD, uint vA, uint vB)
{
emit_vxr(p, 710, vD, vA, vB, "vcmpgtfpx\tv%u, v%u, v%u");
}
/** vector float compare greater than or equal to */
void
ppc_vcmpgefpx(struct ppc_function *p, uint vD, uint vA, uint vB)
{
emit_vxr(p, 454, vD, vA, vB, "vcmpgefpx\tv%u, v%u, v%u");
}
/** vector float compare equal */
void
ppc_vcmpeqfpx(struct ppc_function *p, uint vD, uint vA, uint vB)
{
emit_vxr(p, 198, vD, vA, vB, "vcmpeqfpx\tv%u, v%u, v%u");
}
/** vector float 2^x */
void
ppc_vexptefp(struct ppc_function *p, uint vD, uint vB)
{
emit_vx(p, 394, vD, 0, vB, "vexptefp\tv%u, 0%u, v%u\n", FALSE);
}
/** vector float log2(x) */
void
ppc_vlogefp(struct ppc_function *p, uint vD, uint vB)
{
emit_vx(p, 458, vD, 0, vB, "vlogefp\tv%u, 0%u, v%u\n", FALSE);
}
/** vector float reciprocol */
void
ppc_vrefp(struct ppc_function *p, uint vD, uint vB)
{
emit_vx(p, 266, vD, 0, vB, "vrefp\tv%u, 0%u, v%u\n", FALSE);
}
/** vector float reciprocol sqrt estimate */
void
ppc_vrsqrtefp(struct ppc_function *p, uint vD, uint vB)
{
emit_vx(p, 330, vD, 0, vB, "vrsqrtefp\tv%u, 0%u, v%u\n", FALSE);
}
/** vector float round to negative infinity */
void
ppc_vrfim(struct ppc_function *p, uint vD, uint vB)
{
emit_vx(p, 714, vD, 0, vB, "vrfim\tv%u, 0%u, v%u\n", FALSE);
}
/** vector float round to positive infinity */
void
ppc_vrfip(struct ppc_function *p, uint vD, uint vB)
{
emit_vx(p, 650, vD, 0, vB, "vrfip\tv%u, 0%u, v%u\n", FALSE);
}
/** vector float round to nearest int */
void
ppc_vrfin(struct ppc_function *p, uint vD, uint vB)
{
emit_vx(p, 522, vD, 0, vB, "vrfin\tv%u, 0%u, v%u\n", FALSE);
}
/** vector float round to int toward zero */
void
ppc_vrfiz(struct ppc_function *p, uint vD, uint vB)
{
emit_vx(p, 586, vD, 0, vB, "vrfiz\tv%u, 0%u, v%u\n", FALSE);
}
/** vector store: store vR at mem[rA+rB] */
void
ppc_stvx(struct ppc_function *p, uint vR, uint rA, uint rB)
{
emit_x(p, 31, vR, rA, rB, 231, "stvx\tv%u, r%u, r%u\n");
}
/** vector load: vR = mem[rA+rB] */
void
ppc_lvx(struct ppc_function *p, uint vR, uint rA, uint rB)
{
emit_x(p, 31, vR, rA, rB, 103, "lvx\tv%u, r%u, r%u\n");
}
/** load vector element word: vR = mem_word[ra+rb] */
void
ppc_lvewx(struct ppc_function *p, uint vR, uint rA, uint rB)
{
emit_x(p, 31, vR, rA, rB, 71, "lvewx\tv%u, r%u, r%u\n");
}
/**
** vector bitwise operations
**/
/** vector and */
void
ppc_vand(struct ppc_function *p, uint vD, uint vA, uint vB)
{
emit_vx(p, 1028, vD, vA, vB, "vand\tv%u, v%u, v%u\n", FALSE);
}
/** vector and complement */
void
ppc_vandc(struct ppc_function *p, uint vD, uint vA, uint vB)
{
emit_vx(p, 1092, vD, vA, vB, "vandc\tv%u, v%u, v%u\n", FALSE);
}
/** vector or */
void
ppc_vor(struct ppc_function *p, uint vD, uint vA, uint vB)
{
emit_vx(p, 1156, vD, vA, vB, "vor\tv%u, v%u, v%u\n", FALSE);
}
/** vector nor */
void
ppc_vnor(struct ppc_function *p, uint vD, uint vA, uint vB)
{
emit_vx(p, 1284, vD, vA, vB, "vnor\tv%u, v%u, v%u\n", FALSE);
}
/** vector xor */
void
ppc_vxor(struct ppc_function *p, uint vD, uint vA, uint vB)
{
emit_vx(p, 1220, vD, vA, vB, "vxor\tv%u, v%u, v%u\n", FALSE);
}
/** Pseudo-instruction: vector move */
void
ppc_vmove(struct ppc_function *p, uint vD, uint vA)
{
boolean print = p->print;
p->print = FALSE;
ppc_vor(p, vD, vA, vA);
if (print) {
indent(p);
printf("vor\tv%u, v%u, v%u \t# v%u = v%u\n", vD, vA, vA, vD, vA);
}
p->print = print;
}
/** Set vector register to {0,0,0,0} */
void
ppc_vzero(struct ppc_function *p, uint vr)
{
boolean print = p->print;
p->print = FALSE;
ppc_vxor(p, vr, vr, vr);
if (print) {
indent(p);
printf("vxor\tv%u, v%u, v%u \t# v%u = {0,0,0,0}\n", vr, vr, vr, vr);
}
p->print = print;
}
/**
** Vector shuffle / select / splat / etc
**/
/** vector permute */
void
ppc_vperm(struct ppc_function *p, uint vD, uint vA, uint vB, uint vC)
{
emit_va(p, 43, vD, vA, vB, vC, "vperm\tr%u, r%u, r%u, r%u");
}
/** vector select */
void
ppc_vsel(struct ppc_function *p, uint vD, uint vA, uint vB, uint vC)
{
emit_va(p, 42, vD, vA, vB, vC, "vsel\tr%u, r%u, r%u, r%u");
}
/** vector splat byte */
void
ppc_vspltb(struct ppc_function *p, uint vD, uint vB, uint imm)
{
emit_vx(p, 42, vD, imm, vB, "vspltb\tv%u, v%u, %u\n", TRUE);
}
/** vector splat half word */
void
ppc_vsplthw(struct ppc_function *p, uint vD, uint vB, uint imm)
{
emit_vx(p, 588, vD, imm, vB, "vsplthw\tv%u, v%u, %u\n", TRUE);
}
/** vector splat word */
void
ppc_vspltw(struct ppc_function *p, uint vD, uint vB, uint imm)
{
emit_vx(p, 652, vD, imm, vB, "vspltw\tv%u, v%u, %u\n", TRUE);
}
/** vector splat signed immediate word */
void
ppc_vspltisw(struct ppc_function *p, uint vD, int imm)
{
assert(imm >= -16);
assert(imm < 15);
emit_vx(p, 908, vD, imm, 0, "vspltisw\tv%u, %d, %u\n", FALSE);
}
/** vector shift left word: vD[word] = vA[word] << (vB[word] & 0x1f) */
void
ppc_vslw(struct ppc_function *p, uint vD, uint vA, uint vB)
{
emit_vx(p, 388, vD, vA, vB, "vslw\tv%u, v%u, v%u\n", FALSE);
}
/**
** integer arithmetic
**/
/** rt = ra + imm */
void
ppc_addi(struct ppc_function *p, uint rt, uint ra, int imm)
{
emit_d(p, 14, rt, ra, imm, "addi\tr%u, r%u, %d\n", FALSE);
}
/** rt = ra + (imm << 16) */
void
ppc_addis(struct ppc_function *p, uint rt, uint ra, int imm)
{
emit_d(p, 15, rt, ra, imm, "addis\tr%u, r%u, %d\n", FALSE);
}
/** rt = ra + rb */
void
ppc_add(struct ppc_function *p, uint rt, uint ra, uint rb)
{
emit_xo(p, 31, rt, ra, rb, 0, 266, 0, "add\tr%u, r%u, r%u\n");
}
/** rt = ra AND ra */
void
ppc_and(struct ppc_function *p, uint rt, uint ra, uint rb)
{
emit_x(p, 31, ra, rt, rb, 28, "and\tr%u, r%u, r%u\n"); /* note argument order */
}
/** rt = ra AND imm */
void
ppc_andi(struct ppc_function *p, uint rt, uint ra, int imm)
{
/* note argument order */
emit_d(p, 28, ra, rt, imm, "andi\tr%u, r%u, %d\n", FALSE);
}
/** rt = ra OR ra */
void
ppc_or(struct ppc_function *p, uint rt, uint ra, uint rb)
{
emit_x(p, 31, ra, rt, rb, 444, "or\tr%u, r%u, r%u\n"); /* note argument order */
}
/** rt = ra OR imm */
void
ppc_ori(struct ppc_function *p, uint rt, uint ra, int imm)
{
/* note argument order */
emit_d(p, 24, ra, rt, imm, "ori\tr%u, r%u, %d\n", FALSE);
}
/** rt = ra XOR ra */
void
ppc_xor(struct ppc_function *p, uint rt, uint ra, uint rb)
{
emit_x(p, 31, ra, rt, rb, 316, "xor\tr%u, r%u, r%u\n"); /* note argument order */
}
/** rt = ra XOR imm */
void
ppc_xori(struct ppc_function *p, uint rt, uint ra, int imm)
{
/* note argument order */
emit_d(p, 26, ra, rt, imm, "xori\tr%u, r%u, %d\n", FALSE);
}
/** pseudo instruction: move: rt = ra */
void
ppc_mr(struct ppc_function *p, uint rt, uint ra)
{
ppc_or(p, rt, ra, ra);
}
/** pseudo instruction: load immediate: rt = imm */
void
ppc_li(struct ppc_function *p, uint rt, int imm)
{
boolean print = p->print;
p->print = FALSE;
ppc_addi(p, rt, 0, imm);
if (print) {
indent(p);
printf("addi\tr%u, r0, %d \t# r%u = %d\n", rt, imm, rt, imm);
}
p->print = print;
}
/** rt = imm << 16 */
void
ppc_lis(struct ppc_function *p, uint rt, int imm)
{
ppc_addis(p, rt, 0, imm);
}
/** rt = imm */
void
ppc_load_int(struct ppc_function *p, uint rt, int imm)
{
ppc_lis(p, rt, (imm >> 16)); /* rt = imm >> 16 */
ppc_ori(p, rt, rt, (imm & 0xffff)); /* rt = rt | (imm & 0xffff) */
}
/**
** integer load/store
**/
/** store rs at memory[(ra)+d],
* then update ra = (ra)+d
*/
void
ppc_stwu(struct ppc_function *p, uint rs, uint ra, int d)
{
emit_d(p, 37, rs, ra, d, "stwu\tr%u, %d(r%u)\n", TRUE);
}
/** store rs at memory[(ra)+d] */
void
ppc_stw(struct ppc_function *p, uint rs, uint ra, int d)
{
emit_d(p, 36, rs, ra, d, "stw\tr%u, %d(r%u)\n", TRUE);
}
/** Load rt = mem[(ra)+d]; then zero set high 32 bits to zero. */
void
ppc_lwz(struct ppc_function *p, uint rt, uint ra, int d)
{
emit_d(p, 32, rt, ra, d, "lwz\tr%u, %d(r%u)\n", TRUE);
}
/**
** Float (non-vector) arithmetic
**/
/** add: frt = fra + frb */
void
ppc_fadd(struct ppc_function *p, uint frt, uint fra, uint frb)
{
emit_a(p, 63, frt, fra, frb, 21, 0, "fadd\tf%u, f%u, f%u\n");
}
/** sub: frt = fra - frb */
void
ppc_fsub(struct ppc_function *p, uint frt, uint fra, uint frb)
{
emit_a(p, 63, frt, fra, frb, 20, 0, "fsub\tf%u, f%u, f%u\n");
}
/** convert to int: rt = (int) ra */
void
ppc_fctiwz(struct ppc_function *p, uint rt, uint fra)
{
emit_x(p, 63, rt, 0, fra, 15, "fctiwz\tr%u, r%u, r%u\n");
}
/** store frs at mem[(ra)+offset] */
void
ppc_stfs(struct ppc_function *p, uint frs, uint ra, int offset)
{
emit_d(p, 52, frs, ra, offset, "stfs\tr%u, %d(r%u)\n", TRUE);
}
/** store frs at mem[(ra)+(rb)] */
void
ppc_stfiwx(struct ppc_function *p, uint frs, uint ra, uint rb)
{
emit_x(p, 31, frs, ra, rb, 983, "stfiwx\tr%u, r%u, r%u\n");
}
/** load frt = mem[(ra)+offset] */
void
ppc_lfs(struct ppc_function *p, uint frt, uint ra, int offset)
{
emit_d(p, 48, frt, ra, offset, "stfs\tr%u, %d(r%u)\n", TRUE);
}
/**
** branch instructions
**/
/** BLR: Branch to link register (p. 35) */
void
ppc_blr(struct ppc_function *p)
{
emit_i(p, 18, 0, 0, 1);
if (p->print) {
indent(p);
printf("blr\n");
}
}
/** Branch Conditional to Link Register (p. 36) */
void
ppc_bclr(struct ppc_function *p, uint condOp, uint branchHint, uint condReg)
{
emit_xl(p, 19, condOp, condReg, branchHint, 16, 0);
if (p->print) {
indent(p);
printf("bclr\t%u %u %u\n", condOp, branchHint, condReg);
}
}
/** Pseudo instruction: return from subroutine */
void
ppc_return(struct ppc_function *p)
{
ppc_bclr(p, BRANCH_COND_ALWAYS, BRANCH_HINT_SUB_RETURN, 0);
}
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