diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_wm_glsl.c | 41 |
1 files changed, 32 insertions, 9 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_wm_glsl.c b/src/mesa/drivers/dri/i965/brw_wm_glsl.c index 8e404bcdc37..9f1c559c98a 100644 --- a/src/mesa/drivers/dri/i965/brw_wm_glsl.c +++ b/src/mesa/drivers/dri/i965/brw_wm_glsl.c @@ -631,23 +631,46 @@ static void emit_dph(struct brw_wm_compile *c, brw_set_saturate(p, 0); } +/** + * Emit a scalar instruction, like RCP, RSQ, LOG, EXP. + * Note that the result of the function is smeared across the dest + * register's X, Y, Z and W channels (subject to writemasking of course). + */ static void emit_math1(struct brw_wm_compile *c, struct prog_instruction *inst, GLuint func) { struct brw_compile *p = &c->func; - struct brw_reg src0, dst; + struct brw_reg src0, dst, tmp; + const int mark = mark_tmps( c ); + int i; + + tmp = alloc_tmp(c); + /* Get first component of source register */ src0 = get_src_reg(c, &inst->SrcReg[0], 0, 1); - dst = get_dst_reg(c, inst, get_scalar_dst_index(inst), 1); + + /* tmp = func(src0) */ brw_MOV(p, brw_message_reg(2), src0); brw_math(p, - dst, - func, - (inst->SaturateMode != SATURATE_OFF) ? BRW_MATH_SATURATE_SATURATE : BRW_MATH_SATURATE_NONE, - 2, - brw_null_reg(), - BRW_MATH_DATA_VECTOR, - BRW_MATH_PRECISION_FULL); + tmp, + func, + (inst->SaturateMode != SATURATE_OFF) ? BRW_MATH_SATURATE_SATURATE : BRW_MATH_SATURATE_NONE, + 2, + brw_null_reg(), + BRW_MATH_DATA_VECTOR, + BRW_MATH_PRECISION_FULL); + + /*tmp.dw1.bits.swizzle = SWIZZLE_XXXX;*/ + + /* replicate tmp value across enabled dest channels */ + for (i = 0; i < 4; i++) { + if (inst->DstReg.WriteMask & (1 << i)) { + dst = get_dst_reg(c, inst, i, 1); + brw_MOV(p, dst, tmp); + } + } + + release_tmps(c, mark); } static void emit_rcp(struct brw_wm_compile *c, |