diff options
Diffstat (limited to 'src/gallium/auxiliary/tgsi/tgsi_ppc.c')
| -rw-r--r-- | src/gallium/auxiliary/tgsi/tgsi_ppc.c | 61 |
1 files changed, 54 insertions, 7 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_ppc.c b/src/gallium/auxiliary/tgsi/tgsi_ppc.c index 9d7de41fe7f..6b05fd16cf9 100644 --- a/src/gallium/auxiliary/tgsi/tgsi_ppc.c +++ b/src/gallium/auxiliary/tgsi/tgsi_ppc.c @@ -36,6 +36,7 @@ #include "pipe/p_debug.h" #include "pipe/p_shader_tokens.h" #include "util/u_math.h" +#include "util/u_memory.h" #include "util/u_sse.h" #include "tgsi/tgsi_parse.h" #include "tgsi/tgsi_util.h" @@ -44,6 +45,14 @@ #include "rtasm/rtasm_ppc.h" +/** + * Since it's pretty much impossible to form PPC vector immediates, load + * them from memory here: + */ +const float ppc_builtin_constants[] ALIGN16_ATTRIB = { + 1.0f, -128.0f, 128.0, 0.0 +}; + #define FOR_EACH_CHANNEL( CHAN )\ for (CHAN = 0; CHAN < NUM_CHANNELS; CHAN++) @@ -81,6 +90,7 @@ struct gen_context int temps_reg; /**< GP register pointing to temporary "registers" */ int immed_reg; /**< GP register pointing to immediates buffer */ int const_reg; /**< GP register pointing to constants buffer */ + int builtins_reg; /**< GP register pointint to built-in constants */ int one_vec; /**< vector register with {1.0, 1.0, 1.0, 1.0} */ int bit31_vec; /**< vector register with {1<<31, 1<<31, 1<<31, 1<<31} */ @@ -88,6 +98,39 @@ struct gen_context /** + * Load the given vector register with {value, value, value, value}. + * The value must be in the ppu_builtin_constants[] array. + * We wouldn't need this if there was a simple way to load PPC vector + * registers with immediate values! + */ +static void +load_constant_vec(struct gen_context *gen, int dst_vec, float value) +{ + uint pos; + for (pos = 0; pos < Elements(ppc_builtin_constants); pos++) { + if (ppc_builtin_constants[pos] == value) { + int offset_reg = ppc_allocate_register(gen->f); + int offset = pos * 4; + + ppc_li(gen->f, offset_reg, offset); + /* Load 4-byte word into vector register. + * The vector slot depends on the effective address we load from. + * We know that our builtins start at a 16-byte boundary so we + * know that 'swizzle' tells us which vector slot will have the + * loaded word. The other vector slots will be undefined. + */ + ppc_lvewx(gen->f, dst_vec, gen->builtins_reg, offset_reg); + /* splat word[pos % 4] across the vector reg */ + ppc_vspltw(gen->f, dst_vec, dst_vec, pos % 4); + ppc_release_register(gen->f, offset_reg); + return; + } + } + assert(0 && "Need to add new constant to ppc_builtin_constants array"); +} + + +/** * Return index of vector register containing {1.0, 1.0, 1.0, 1.0}. */ static int @@ -95,7 +138,7 @@ gen_one_vec(struct gen_context *gen) { if (gen->one_vec < 0) { gen->one_vec = ppc_allocate_vec_register(gen->f); - ppc_vload_float(gen->f, gen->one_vec, 1.0f); + load_constant_vec(gen, gen->one_vec, 1.0f); } return gen->one_vec; } @@ -115,7 +158,6 @@ gen_get_bit31_vec(struct gen_context *gen) } - /** * Register fetch, put result in 'dst_vec'. */ @@ -182,7 +224,7 @@ emit_fetch(struct gen_context *gen, } break; case TGSI_EXTSWIZZLE_ZERO: - ppc_vload_float(gen->f, dst_vec, 0.0f); + ppc_vzero(gen->f, dst_vec); break; case TGSI_EXTSWIZZLE_ONE: { @@ -544,7 +586,7 @@ ppc_vec_pow(struct ppc_function *f, int vr, int va, int vb) int t_vec = ppc_allocate_vec_register(f); int zero_vec = ppc_allocate_vec_register(f); - ppc_vload_float(f, zero_vec, 0.0f); + ppc_vzero(f, zero_vec); ppc_vlogefp(f, t_vec, va); /* t = log2(va) */ ppc_vmaddfp(f, t_vec, t_vec, vb, zero_vec); /* t = t * vb */ @@ -573,7 +615,7 @@ emit_lit(struct gen_context *gen, struct tgsi_full_instruction *inst) FETCH(gen, *inst, x_vec, 0, CHAN_X); /* x_vec = src[0].x */ - ppc_vload_float(gen->f, zero_vec, 0.0f); /* zero = {0,0,0,0} */ + ppc_vzero(gen->f, zero_vec); /* zero = {0,0,0,0} */ ppc_vmaxfp(gen->f, x_vec, x_vec, zero_vec); /* x_vec = max(x_vec, 0) */ if (IS_DST0_CHANNEL_ENABLED(*inst, CHAN_Y)) { @@ -586,7 +628,8 @@ emit_lit(struct gen_context *gen, struct tgsi_full_instruction *inst) int w_vec = ppc_allocate_vec_register(gen->f); int pow_vec = ppc_allocate_vec_register(gen->f); int pos_vec = ppc_allocate_vec_register(gen->f); - int c128_vec = ppc_allocate_vec_register(gen->f); + int p128_vec = ppc_allocate_vec_register(gen->f); + int n128_vec = ppc_allocate_vec_register(gen->f); FETCH(gen, *inst, y_vec, 0, CHAN_Y); /* y_vec = src[0].y */ ppc_vmaxfp(gen->f, y_vec, y_vec, zero_vec); /* y_vec = max(y_vec, 0) */ @@ -594,7 +637,8 @@ emit_lit(struct gen_context *gen, struct tgsi_full_instruction *inst) FETCH(gen, *inst, w_vec, 0, CHAN_W); /* w_vec = src[0].w */ /* XXX clamp Y to [-128, 128] */ - ppc_vload_float(gen->f, c128_vec, 128.0f); + load_constant_vec(gen, p128_vec, 128.0f); + load_constant_vec(gen, n128_vec, -128.0f); /* if temp.x > 0 * pow(tmp.y, tmp.w) @@ -613,6 +657,8 @@ emit_lit(struct gen_context *gen, struct tgsi_full_instruction *inst) ppc_release_vec_register(gen->f, w_vec); ppc_release_vec_register(gen->f, pow_vec); ppc_release_vec_register(gen->f, pos_vec); + ppc_release_vec_register(gen->f, p128_vec); + ppc_release_vec_register(gen->f, n128_vec); } ppc_release_vec_register(gen->f, x_vec); @@ -798,6 +844,7 @@ tgsi_emit_ppc(const struct tgsi_token *tokens, gen.temps_reg = ppc_reserve_register(func, 5); /* ... */ gen.immed_reg = ppc_reserve_register(func, 6); gen.const_reg = ppc_reserve_register(func, 7); + gen.builtins_reg = ppc_reserve_register(func, 8); gen.one_vec = -1; gen.bit31_vec = -1; |