diff options
| -rw-r--r-- | src/gallium/drivers/vc4/vc4_program.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c index 1d048206f8f..0b26f5adf5b 100644 --- a/src/gallium/drivers/vc4/vc4_program.c +++ b/src/gallium/drivers/vc4/vc4_program.c @@ -403,6 +403,43 @@ tgsi_to_qir_sin(struct tgsi_to_qir *trans, return sum; } +/* Note that this instruction replicates its result from the x channel */ +static struct qreg +tgsi_to_qir_cos(struct tgsi_to_qir *trans, + struct tgsi_full_instruction *tgsi_inst, + enum qop op, struct qreg *src, int i) +{ + struct qcompile *c = trans->c; + float coeff[] = { + 1.0f, + -pow(2.0 * M_PI, 2) / (2 * 1), + pow(2.0 * M_PI, 4) / (4 * 3 * 2 * 1), + -pow(2.0 * M_PI, 6) / (6 * 5 * 4 * 3 * 2 * 1), + }; + + struct qreg scaled_x = + qir_FMUL(c, src[0 * 4 + 0], + qir_uniform_f(trans, 1.0f / (M_PI * 2.0f))); + struct qreg x_frac = tgsi_to_qir_frc(trans, NULL, 0, &scaled_x, 0); + + struct qreg sum = qir_uniform_f(trans, coeff[0]); + struct qreg x2 = qir_FMUL(c, x_frac, x_frac); + struct qreg x = x2; /* Current x^2, x^4, or x^6 */ + for (int i = 1; i < ARRAY_SIZE(coeff); i++) { + if (i != 1) + x = qir_FMUL(c, x, x2); + + struct qreg mul = qir_FMUL(c, + x, + qir_uniform_f(trans, coeff[i])); + if (i == 0) + sum = mul; + else + sum = qir_FADD(c, sum, mul); + } + return sum; +} + static void emit_vertex_input(struct tgsi_to_qir *trans, int attr) { @@ -532,6 +569,7 @@ emit_tgsi_instruction(struct tgsi_to_qir *trans, [TGSI_OPCODE_TRUNC] = { 0, tgsi_to_qir_trunc }, [TGSI_OPCODE_FRC] = { 0, tgsi_to_qir_frc }, [TGSI_OPCODE_SIN] = { 0, tgsi_to_qir_sin }, + [TGSI_OPCODE_COS] = { 0, tgsi_to_qir_cos }, }; static int asdf = 0; uint32_t tgsi_op = tgsi_inst->Instruction.Opcode; |