diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs.cpp | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index 8fd120cb653..66bbdbe80e6 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -661,14 +661,18 @@ fs_visitor::emit_math(fs_opcodes opcode, fs_reg dst, fs_reg src0, fs_reg src1) assert(opcode == FS_OPCODE_POW); if (intel->gen >= 6) { - /* Can't do hstride == 0 args to gen6 math, so expand it out. */ - if (src0.file == UNIFORM) { + /* Can't do hstride == 0 args to gen6 math, so expand it out. + * + * The hardware ignores source modifiers (negate and abs) on math + * instructions, so we also move to a temp to set those up. + */ + if (src0.file == UNIFORM || src0.abs || src0.negate) { fs_reg expanded = fs_reg(this, glsl_type::float_type); emit(fs_inst(BRW_OPCODE_MOV, expanded, src0)); src0 = expanded; } - if (src1.file == UNIFORM) { + if (src1.file == UNIFORM || src1.abs || src1.negate) { fs_reg expanded = fs_reg(this, glsl_type::float_type); emit(fs_inst(BRW_OPCODE_MOV, expanded, src1)); src1 = expanded; |