From 44e1affaec3477d52c56cd2a10b20af48ae39854 Mon Sep 17 00:00:00 2001 From: Iago Toral Quiroga Date: Fri, 26 Oct 2018 13:40:27 +0200 Subject: [PATCH] intel/compiler: implement is_zero, is_one, is_negative_one for 8-bit/16-bit There are no 8-bit immediates, so assert in that case. 16-bit immediates are replicated in each word of a 32-bit immediate, so we only need to check the lower 16-bits. v2: - Fix is_zero with half-float to consider -0 as well (Jason). - Fix is_negative_one for word type. Reviewed-by: Jason Ekstrand --- src/intel/compiler/brw_shader.cpp | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/src/intel/compiler/brw_shader.cpp b/src/intel/compiler/brw_shader.cpp index 06f613cf6b5..f7ed108bd07 100644 --- a/src/intel/compiler/brw_shader.cpp +++ b/src/intel/compiler/brw_shader.cpp @@ -713,11 +713,20 @@ backend_reg::is_zero() const if (file != IMM) return false; + assert(type_sz(type) > 1); + switch (type) { + case BRW_REGISTER_TYPE_HF: + assert((d & 0xffff) == ((d >> 16) & 0xffff)); + return (d & 0xffff) == 0 || (d & 0xffff) == 0x8000; case BRW_REGISTER_TYPE_F: return f == 0; case BRW_REGISTER_TYPE_DF: return df == 0; + case BRW_REGISTER_TYPE_W: + case BRW_REGISTER_TYPE_UW: + assert((d & 0xffff) == ((d >> 16) & 0xffff)); + return (d & 0xffff) == 0; case BRW_REGISTER_TYPE_D: case BRW_REGISTER_TYPE_UD: return d == 0; @@ -735,11 +744,20 @@ backend_reg::is_one() const if (file != IMM) return false; + assert(type_sz(type) > 1); + switch (type) { + case BRW_REGISTER_TYPE_HF: + assert((d & 0xffff) == ((d >> 16) & 0xffff)); + return (d & 0xffff) == 0x3c00; case BRW_REGISTER_TYPE_F: return f == 1.0f; case BRW_REGISTER_TYPE_DF: return df == 1.0; + case BRW_REGISTER_TYPE_W: + case BRW_REGISTER_TYPE_UW: + assert((d & 0xffff) == ((d >> 16) & 0xffff)); + return (d & 0xffff) == 1; case BRW_REGISTER_TYPE_D: case BRW_REGISTER_TYPE_UD: return d == 1; @@ -757,11 +775,19 @@ backend_reg::is_negative_one() const if (file != IMM) return false; + assert(type_sz(type) > 1); + switch (type) { + case BRW_REGISTER_TYPE_HF: + assert((d & 0xffff) == ((d >> 16) & 0xffff)); + return (d & 0xffff) == 0xbc00; case BRW_REGISTER_TYPE_F: return f == -1.0; case BRW_REGISTER_TYPE_DF: return df == -1.0; + case BRW_REGISTER_TYPE_W: + assert((d & 0xffff) == ((d >> 16) & 0xffff)); + return (d & 0xffff) == 0xffff; case BRW_REGISTER_TYPE_D: return d == -1; case BRW_REGISTER_TYPE_Q: -- 2.30.2