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i965/vec4: Return the last emitted instruction in emit_math()

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Needed in the NIR backend to set the "saturate" value of the
instruction.

Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
This commit is contained in:
Antia Puentes 2015-06-17 00:04:09 +02:00 • committed by Jason Ekstrand
parent 9acebf1461
commit 068a41b349
2 changed files with 7 additions and 4 deletions
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5
src/mesa/drivers/dri/i965/brw_vec4.h
View file

@ -321,8 +321,9 @@ public:
src_reg fix_3src_operand(src_reg src);
void emit_math(enum opcode opcode, const dst_reg &dst, const src_reg &src0,
const src_reg &src1 = src_reg());
vec4_instruction *emit_math(enum opcode opcode, const dst_reg &dst, const src_reg &src0,
const src_reg &src1 = src_reg());
src_reg fix_math_operand(src_reg src);
void emit_pack_half_2x16(dst_reg dst, src_reg src0);

6
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
View file

@ -338,7 +338,7 @@ vec4_visitor::fix_math_operand(src_reg src)
return src_reg(expanded);
}
void
vec4_instruction *
vec4_visitor::emit_math(enum opcode opcode,
const dst_reg &dst,
const src_reg &src0, const src_reg &src1)
@ -350,11 +350,13 @@ vec4_visitor::emit_math(enum opcode opcode,
/* MATH on Gen6 must be align1, so we can't do writemasks. */
math->dst = dst_reg(this, glsl_type::vec4_type);
math->dst.type = dst.type;
emit(MOV(dst, src_reg(math->dst)));
math = emit(MOV(dst, src_reg(math->dst)));
} else if (devinfo->gen < 6) {
math->base_mrf = 1;
math->mlen = src1.file == BAD_FILE ? 1 : 2;
}
return math;
}
void