gallium: add LDEXP TGSI instruction and corresponding cap

Reviewed-by: Marek Olšák <[email protected]>
Tested-by: Dieter Nützel <[email protected]>

5 files changed, 20 insertions, 2 deletions

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_limits.h b/src/gallium/auxiliary/gallivm/lp_bld_limits.h
index 421eeda4e7a..ea320bb5f7b 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_limits.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld_limits.h
@@ -134,6 +134,7 @@ gallivm_get_shader_param(enum pipe_shader_cap param)
       return 1;
    case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
    case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
+   case PIPE_SHADER_CAP_TGSI_LDEXP_SUPPORTED:
    case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
    case PIPE_SHADER_CAP_MAX_SHADER_BUFFERS:
    case PIPE_SHADER_CAP_MAX_SHADER_IMAGES:
diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.c b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index 2a47f5dfaef..9c019a311d7 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.c
@@ -1454,6 +1454,17 @@ micro_pow(
 }
 
 static void
+micro_ldexp(union tgsi_exec_channel *dst,
+            const union tgsi_exec_channel *src0,
+            const union tgsi_exec_channel *src1)
+{
+   dst->f[0] = ldexpf(src0->f[0], src1->i[0]);
+   dst->f[1] = ldexpf(src0->f[1], src1->i[1]);
+   dst->f[2] = ldexpf(src0->f[2], src1->i[2]);
+   dst->f[3] = ldexpf(src0->f[3], src1->i[3]);
+}
+
+static void
 micro_sub(union tgsi_exec_channel *dst,
           const union tgsi_exec_channel *src0,
           const union tgsi_exec_channel *src1)
@@ -5082,6 +5093,10 @@ exec_instruction(
       exec_scalar_binary(mach, inst, micro_pow, TGSI_EXEC_DATA_FLOAT, TGSI_EXEC_DATA_FLOAT);
       break;
 
+   case TGSI_OPCODE_LDEXP:
+      exec_scalar_binary(mach, inst, micro_ldexp, TGSI_EXEC_DATA_FLOAT, TGSI_EXEC_DATA_INT);
+      break;
+
    case TGSI_OPCODE_COS:
       exec_scalar_unary(mach, inst, micro_cos, TGSI_EXEC_DATA_FLOAT, TGSI_EXEC_DATA_FLOAT);
       break;
diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.h b/src/gallium/auxiliary/tgsi/tgsi_exec.h
index d28d99793b8..514c69ede30 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.h
@@ -534,6 +534,7 @@ tgsi_exec_get_shader_param(enum pipe_shader_cap param)
    case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
       return 1;
    case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
+   case PIPE_SHADER_CAP_TGSI_LDEXP_SUPPORTED:
    case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
       return 1;
    case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
diff --git a/src/gallium/auxiliary/tgsi/tgsi_info.c b/src/gallium/auxiliary/tgsi/tgsi_info.c
index 62b41c031b3..4e399508e5b 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_info.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_info.c
@@ -244,7 +244,8 @@ tgsi_opcode_infer_type( uint opcode )
 enum tgsi_opcode_type
 tgsi_opcode_infer_src_type(uint opcode, uint src_idx)
 {
-   if (src_idx == 1 && opcode == TGSI_OPCODE_DLDEXP)
+   if (src_idx == 1 &&
+       (opcode == TGSI_OPCODE_DLDEXP || opcode == TGSI_OPCODE_LDEXP))
       return TGSI_TYPE_SIGNED;
 
    switch (opcode) {
diff --git a/src/gallium/auxiliary/tgsi/tgsi_info_opcodes.h b/src/gallium/auxiliary/tgsi/tgsi_info_opcodes.h
index 3f39afe2196..fdb0f1078a1 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_info_opcodes.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_info_opcodes.h
@@ -19,7 +19,7 @@ OPCODE(1, 2, OTHR, TEX_LZ, .is_tex = 1)
 OPCODE(1, 3, COMP, LRP)
 OPCODE(1, 3, COMP, FMA)
 OPCODE(1, 1, REPL, SQRT)
-OPCODE_GAP(21) /* removed */
+OPCODE(1, 2, COMP, LDEXP)
 OPCODE(1, 1, COMP, F2U64)
 OPCODE(1, 1, COMP, F2I64)
 OPCODE(1, 1, COMP, FRC)