diff options
Diffstat (limited to 'src/gallium/auxiliary/rtasm')
-rw-r--r-- | src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c | 47 | ||||
-rw-r--r-- | src/gallium/auxiliary/rtasm/rtasm_ppc_spe.h | 16 |
2 files changed, 63 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c b/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c index 95a2d6fcbb..a996218ce7 100644 --- a/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c +++ b/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c @@ -306,6 +306,11 @@ void spe_init_func(struct spe_function *p, unsigned code_size) { p->store = align_malloc(code_size, 16); p->csr = p->store; + + /* Conservatively treat R0 - R2 and R80 - R127 as non-volatile. + */ + p->regs[0] = ~7; + p->regs[1] = (1U << (80 - 64)) - 1; } @@ -317,6 +322,48 @@ void spe_release_func(struct spe_function *p) } +int spe_allocate_available_register(struct spe_function *p) +{ + unsigned i; + for (i = 0; i < 128; i++) { + const uint64_t mask = (1ULL << (i % 128)); + const unsigned idx = i / 128; + + if ((p->regs[idx] & mask) != 0) { + p->regs[idx] &= ~mask; + return i; + } + } + + return -1; +} + + +int spe_allocate_register(struct spe_function *p, int reg) +{ + const unsigned idx = reg / 128; + const unsigned bit = reg % 128; + + assert((p->regs[idx] & (1ULL << bit)) != 0); + + p->regs[idx] &= ~(1ULL << bit); + return reg; +} + + +void spe_release_register(struct spe_function *p, int reg) +{ + const unsigned idx = reg / 128; + const unsigned bit = reg % 128; + + assert((p->regs[idx] & (1ULL << bit)) == 0); + + p->regs[idx] |= (1ULL << bit); +} + + + + void spe_bi(struct spe_function *p, unsigned rA, int d, int e) { emit_RI7(p, 0x1a8, 0, rA, (d << 5) | (e << 4)); diff --git a/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.h b/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.h index 10ce44b3a0..5a1eb1ed8d 100644 --- a/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.h +++ b/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.h @@ -39,11 +39,27 @@ struct spe_function { uint32_t *store; uint32_t *csr; const char *fn; + + /** + * Mask of used / unused registers + * + * Each set bit corresponds to an available register. Each cleared bit + * corresponds to an allocated register. + * + * \sa + * spe_allocate_register, spe_allocate_available_register, + * spe_release_register + */ + uint64_t regs[2]; }; extern void spe_init_func(struct spe_function *p, unsigned code_size); extern void spe_release_func(struct spe_function *p); +extern int spe_allocate_available_register(struct spe_function *p); +extern int spe_allocate_register(struct spe_function *p, int reg); +extern void spe_release_register(struct spe_function *p, int reg); + #endif /* RTASM_PPC_SPE_H */ #ifndef EMIT_ |